Welcome to the North American Subaru Impreza Owners Club Thursday September 18, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-08-2007, 08:05 PM   #1
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Cool My review: Crawford vs. Perrin rotated kits + GT vs. T31 turbine housing

Well, I cut/paste from my gallery thread but here's my reivew. You can see all of the install pics. Please check it out here:

http://forums.nasioc.com/forums/show...1055292&page=7

First, let me start off with a review of the Perrin vs. Crawford rotated kits:
The Perrin kit works. Period. It is an inexpensive way to get an ok amount of power while sacrificing some drive ability in cases. These two kits accomplish the same thing, in a very different way.

The bottom line is that the Perrin kit has QC issues. The Crawford kit was honestly......perfect.......as far as fitment QC issues......there's NONE. You know how I know? My EVO2 exhaust sat waaaay crooked with the Perrin kit. (I thought the catback was bent wrong!) With the Crawford kit....it is now even!

During the Perrin kit install, it was obvious to me that it could not get done by myself.....as far as *MY* rotated kit. I obtained the help from one of my good buddies. I had ALOT of trouble with getting the waste gate on, with the Perrin kit, where the valve seat comes together at the v-band....it didn't really fit correctly, but I was able to get it on there after a good amount of struggle. (I actually had to apply air to the valve because the surface for the valve seat where the seat sits....seemed to shallow.....if you installed a kit, you know what Im talking about)

Installing the Crawford kit, Chris from Crawford told me the waste gate was the hardest part . Chris, you've never installed a Perrin kit. :lol The waste gate slid right in....downpipe fit PERFECT. i did EVERYTHING myself as far as all the install....I did have a friend help me cut the bumper and install the injectors and fmic tubing.

In my eyes, here's the advantages of the Crawford kit...and you can see in the pics:

Pros:
-EVERYTHING is jet-hot coated....even the turbo bracket!
-bellows in the up-pipe and downpipe!
-the turbo bracket is VERY nice.
-CAI
-newer GT exhaust housing
-comes with intercooler piping for their fmic....or I believe the APS unit also AND it's ALUMINUM!
-larger air filter than the perrin kit....plus it's a K&N vs. foam
-Oil Drain is ACTUALLY A BENT MEAL TUBE THAT FITS JUST LIKE OEM!!!!
-welds are on the INSIDE of the pipes....not the traditional outside like the cheaper way of doing it
-It's the little things such as the downpipe hanger, or using the OEM oil drain.....or the metal welded nipples on the intake.....or the nice oil restictor instead of the little "drop in pills", or the CP engraving on the intake maf housing....
-no more hitting the crossmember with the downpipe....there's PLENTY of clearance

Pros of the Perrin kit:
-cost
-it does work

Con's of the Crawford kit:
-IMO the o2 sensor bung needs to be at a more upward angle instead of straight out the side

con's of the Perrin kit:
-lol....the fitment in general. It was bent wrong, period. My downpipe hit my crossmember
-smaller foam air filter....I never liked it compared to an actual oil bathed paper filter
-no bellows in any of the pipes
-oil drain is a crazy concauction....you better not get that kinked at all....or you" ll have blue smoke out the exhaust! (turbo seals...ask flycaster)
-THE INTAKE!. It's subpar, and that IS the bottom line. There's only a few tuners in the country that are good enough to make it idle correctly. Luckily I had PDX and they deal directly with Perrin and have the competence.
-The outdated turbine housing. Although I don't know of any real testing, WHY would garrett make another one? Some famous tuners like the newer housing and claim various power/spool gains.
-no turbo bracket for support. although there's no bellows so you done HAVE to have one.....you're asking for welds to break
-flanges welded on the outside


I really wish we could put the GT housing vs. T31 housing debate....to bed. It would be nice to have conclusive evidence either way.




After being through both kits, both companies and various setups, it is IMO that Crawfords motto is the KISS principal:

Keep It Simple Stupid.

It seems as though they went OEM whenever possible....or copied the OEM designing when incorporating that into the hardware.

here is a slight review from 30r to 35r:

Ok peeps, 35r vs 30r. I have about 20 miles driven on the 35r combo.

ummm.....wow!? My buddy laughed his head off because the car pulls so well. I used DeltaDash to datalog, but I am still kinda breaking in the "new" to make sure I didn't forget nothing. I logged ZERO knock....knocklite never went off either......A+. There is a difference in lag.....less than what I thought there was going to be....but the car just bangs off the rev limiter . I hit 7k ALOT (limiter needs adjusting to 7500) . I was shocked that there isn't an instant hit....actually in all honesty...it's more smooth than the 30r......I think it's because of the stock boost control system im using instead of the DTEC i had? :

The turbo sound is completely changed....the 30r sounds like a jet turbine....with the 35r, this is not as much....more of an air rushing noise....not as high pitched. Frankly, I liked that jet turbine noise of the 30r. But hell....I've only driven 20 miles.


p.s...I need to find the pics showing my uber crooked evo2 exhaust from the perrin kit:

old turbo location:







New turbo from side angle:






old parts on the floor:



New parts on the floor:





Perrin intake I questioned Jeff Perrin about....he said it was ok...but I didn't like it. i had to cut it with a razor blade to clean it up

* Registered users of the site do not see these ads.
modaddict is offline   Reply With Quote
Old 08-08-2007, 08:06 PM   #2
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

old engine bay:




New engine bay:





or anyone who cares to see the turbine housing difference from the outside:



modaddict is offline   Reply With Quote
Old 08-08-2007, 08:26 PM   #3
wuuusaa
Scooby Guru
 
Member#: 92894
Join Date: Aug 2005
Chapter/Region: International
Location: Running away from Polar bears
Default

got pics i'm interested to see the difference.

btw how much of a cost difference is there between the kits?
wuuusaa is offline   Reply With Quote
Old 08-08-2007, 08:44 PM   #4
shady
Scooby Newbie
 
Member#: 79031
Join Date: Jan 2005
Location: Oxnard
Vehicle:
04 STI
WRB w/ Gold

Default

Off topic
Ryan,
are you and the wife coming for the Mt Baker run in Sept? I would like a ride to see how it runs.

On topic.
Did you also look at Ultimate racing's kit too?


Shea
shady is offline   Reply With Quote
Old 08-08-2007, 08:49 PM   #5
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Quote:
Originally Posted by ol'skoolwrx View Post
got pics i'm interested to see the difference.

btw how much of a cost difference is there between the kits?
umm...you talking about the turbine housings for pics if so....look at the last two pics.

apples to apples comparison, the perrin kit retails for 3,499.99
http://perrinperformance.com/product...gory=5&model=2

the Crawford kit retails for 3,999.95


Ryan
modaddict is offline   Reply With Quote
Old 08-08-2007, 08:53 PM   #6
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Quote:
Originally Posted by shady View Post
Off topic
Ryan,
are you and the wife coming for the Mt Baker run in Sept? I would like a ride to see how it runs.

On topic.
Did you also look at Ultimate racing's kit too?


Shea
Shea, good to talk to you again! I really really hope I get to go to the baker run and I would love to give you a ride.


I did not really look at Ultimate racing's kit. I am hoping to do some road racing at PIR soon and I thought Crawford would be a good company to get parts from. This is NOT to take away anything fro UR, I have seen pics and have no doubt that kit performs......as does the perrin.

I just wanted to tell people that the perrin kit, IMO, was a kit that wasn't ideal, but works......and that people have options.
modaddict is offline   Reply With Quote
Old 08-08-2007, 09:07 PM   #7
albie1kanobi
Scooby Newbie
 
Member#: 101607
Join Date: Nov 2005
Chapter/Region: South East
Location: Gibsonton,FL
Vehicle:
06 Subaru STi
Aspen White

Default

nice review!
albie1kanobi is offline   Reply With Quote
Old 08-08-2007, 10:39 PM   #8
lev98
Scooby Guru
 
Member#: 140529
Join Date: Feb 2007
Chapter/Region: TXIC
Location: Dfw
Vehicle:
01 Ferrari 360 spy

Default

Nice review and I hope to go rotated one day. I like the crawford kit there.
lev98 is offline   Reply With Quote
Old 08-09-2007, 02:27 AM   #9
sleepy98
Scooby Newbie
 
Member#: 96084
Join Date: Sep 2005
Vehicle:
98 obs
green

Default

That's actually a great review. What are the driving impressions? Have you been able to romp on it yet?
sleepy98 is offline   Reply With Quote
Old 08-09-2007, 07:36 AM   #10
Zornorph
Scooby Specialist
 
Member#: 17332
Join Date: Apr 2002
Chapter/Region: NESIC
Location: The neighbor's yard
Vehicle:
2004 Black STI
Not stock anymore

Default

Nice work, mod. Liking the intake setup.
Zornorph is offline   Reply With Quote
Old 08-09-2007, 09:37 AM   #11
TopEndPull
Scooby Specialist
 
Member#: 126112
Join Date: Sep 2006
Chapter/Region: TXIC
Location: Houston,Texas
Vehicle:
93.5 Toyota Supra
Red

Default

Good Work, and very useful info.
i plan on going rotated with 35r really soon so this lets me know i have
a few other options on which kits to buy!
TopEndPull is offline   Reply With Quote
Old 08-09-2007, 10:23 AM   #12
MATT0404
Scooby Specialist
 
Member#: 85765
Join Date: Apr 2005
Location: PA
Default

Good writeup!
MATT0404 is offline   Reply With Quote
Old 08-09-2007, 11:48 AM   #13
Freon
Scooby Specialist
 
Member#: 88322
Join Date: Jun 2005
Chapter/Region: MWSOC
Location: Indianapolis, IN
Vehicle:
2009 BMW 135i

Default

Thanks for the post and info.

I agree the Perrin kit is overall built cheaper. I personally had no real big fitment issues and installed it myself, on ramps in my garage, with no air tools. I guess I got the "good" trannie casting so my WG fit without problem. The downpipe is too close to the transmission mount, and I had to dent the pipe to make sure it would clear. Not a huge deal, but, it could've just been bent to clear in the first place. There isn't any reason it could not have been set about an inch over and clear easily. You'd think they could just make a minor adjustment on the pipe bender program or something...

I can't remember seeing any reports of people busting welds on their Perrin kits, not to say it hasn't happened. Perrin has sold a boat load of these over the past year+. I think if there was a real problem here we'd be seeing tons of "Perrin rotated cracked!" posts, as there are tons of Perrin kit users here and people LOVE to bitch about ****. I have both my UP and DP wrapped, driven a full year in Indiana, from -10F to 100F, parked outside during the day at work, through snow drifts, etc. and nothing has cracked. I'd probably feel better if it had a bracket, but again, it doesn't seem like these are breaking left and right so I find it hard to really complain about it. Perrin does say they require a catback with a flex joint, something to keep in mind. Not sure if other options do.

I think there are plenty of dynos in PPB to determine if the Perrin kit overall (T31 and all) is actually costing the power or spool some have claimed... A year later, I remain unconvinced this is much of an issue at all despite all the crying foul by a few. When I emailed ATPturbo about the T31 and GT, they gave me a very agnostic response. They didn't even suggest it over the older one, let alone push it, or say it is better in any way. I believe someone else who contacted Garrett got a similarly neutral response when this issue first came up last year. I don't see any reason they'd hold back from saying the GT housing is better and push it if it were so important. I at least agree in principle that a newer design, costing the same (which they do, best I can tell, and even Perrin admitted it), would be a more obvious choice. Maybe it flows 0.9% more efficiently or something.

I agree the intake is poor. Worst filter placement ever for many reasons. My main beef is intake temps. Others complain about being right next to the rad fans, or it being too close to the turbo, etc. I ended up both making my own CAI, and I'm running speed density now so it isn't a big deal, but out of the box it could be much better. I had it fairly well tweaked, but it is a huge pain, and intake temps are still awful.

As for fitting the FMIC, CP's kit fits the expensive CP FMIC. Perrin is leaving it up to you to fit it to whatever FMIC you want. It's not that hard to adapt it to a Perrin, TXS, or other common, affordable FMIC. I don't think this is so unreasonable. It's much harder to make a custom intake to deal with the intake issues.

As for price, well, I don't think anyone is paying MSRP for the Perrin kit. The price definitely went up since introduction. I only paid about $2500 when they first came out, now they're closer to ~$3000. At $2500 it was more comparable to getting an FP Green, 3" inlet, and EWG setup. I certainly think there are enough differences from Perrin to CP or UR that if the price difference is only a few hundred bucks you're going to want to think over carefully. I think in the real world the price difference is still about a grand. A grand covers a lot other parts for those who aren't running on an unlimited budget.

It'd be nice for Perrin to come out with a V2 kit with a few of the fitment issues worked out, a better intake, and the new GT housing (if nothing else, its the same price, and saves them welding the little bell section at the top of the DP). I guess they feel they're successful enough as is, but surely they're losing sales on it.
Freon is offline   Reply With Quote
Old 08-09-2007, 12:29 PM   #14
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Quote:
Originally Posted by sleepy98 View Post
That's actually a great review. What are the driving impressions? Have you been able to romp on it yet?
thanks everyone for the compliments.

My impressions will wait as I am not fully tuned yet, so an apples to apples 30r vs 35r will have to wait. I HAVE been able to romp on it....but.....


....just be patient for now

modaddict is offline   Reply With Quote
Old 08-09-2007, 12:43 PM   #15
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Quote:
Originally Posted by Freon View Post
Thanks for the post and info.

I agree the Perrin kit is overall built cheaper. I personally had no real big fitment issues and installed it myself, on ramps in my garage, with no air tools. I guess I got the "good" trannie casting so my WG fit without problem.

I can't remember seeing any reports of people busting welds on their Perrin kits, not to say it hasn't happened.


As for fitting the FMIC, CP's kit fits the expensive CP FMIC. Perrin is leaving it up to you to fit it to whatever FMIC you want. It's not that hard to adapt it to a Perrin, TXS, or other common, affordable FMIC. I don't think this is so unreasonable. It's much harder to make a custom intake to deal with the intake issues.


I only paid about $2500 when they first came out, now they're closer to ~$3000.
Great post Freon!

You got lucky on the install! However, I too had the "good" tranny casting and did not have to grind anything off my tranny bellhousing like some people have had to. It was just an UBER PITA to get the wastegate clamp on the uppipe side (something WASN'T right.....but I got it...phew)

I too, have not heard of any welds breaking. What I should have done is taken a picture of the downpipe to turbo flange and how we had to "suck" the top together. The bottom of the flange was flush...the top was out 3/16 of an inch....like this

turbine
| / downpipe flange

I had to suck the top together and it always made me cringe to know I was pulling on the weld. FWIW, when I pulled it off.....It was fine. the heat cycling probably made it bend into shape.....IMO.

As far as the fmic is concerned. I guess that is an advantage to the perrin kit....you can basically use any fmic you want. I used ATELAST $80 in couplers and clamps to mate it to my ebay fmic. (I know you did it similar)

with the CP kit, you're limited to the front hole in the fender....... and I'd be willing to bet, as far as cost standpoint goes, you can get the kit without those intercooler pipes....thus, lowering the total cost of the kit, a little bit.



thanks for your reply!


It's nice to know we have options.
modaddict is offline   Reply With Quote
Old 08-09-2007, 03:17 PM   #16
Badler
Scooby Guru
 
Member#: 133597
Join Date: Nov 2006
Chapter/Region: SCIC
Location: Orange
Default

Nice! It looks like you cut out about 2-3' of intercooler piping with the CP kit. Could this have aided in your spooling making it feel more similar to the 30r? That is one clean set up. Awesome review!
Badler is offline   Reply With Quote
Old 08-09-2007, 05:12 PM   #17
337drew
Scooby Newbie
 
Member#: 64631
Join Date: Jun 2004
Default

Quote:
Originally Posted by Freon View Post
As for fitting the FMIC, CP's kit fits the expensive CP FMIC.
The Crawford FMIC is only $900 and for those of us in the marked for a rotated kit + FMIC, this option makes a lot of sense.

Quote:
Originally Posted by Freon View Post
As for price, well, I don't think anyone is paying MSRP for the Perrin kit. The price definitely went up since introduction. I only paid about $2500 when they first came out, now they're closer to ~$3000. At $2500 it was more comparable to getting an FP Green, 3" inlet, and EWG setup. I certainly think there are enough differences from Perrin to CP or UR that if the price difference is only a few hundred bucks you're going to want to think over carefully. I think in the real world the price difference is still about a grand. A grand covers a lot other parts for those who aren't running on an unlimited budget.
I've been in the marked for a rotated kit for quite some time and got quotes from at least 4 tuners in my area on the Perrin kit. First of all, I couldn't find a GT35R Perrin kit for under $3000. Perhaps used, or online you can get that deal, but not locally and brand new. Second of all, the Perrin FMIC retails from $1280 - $1380. Thats almost $500 more than the CP FMIC.

In the end the CP kit + FMIC is roughly the same as paying MSRP for a Perrin GT35kit + FMIC.
337drew is offline   Reply With Quote
Old 08-09-2007, 06:09 PM   #18
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Mod, I'm sure Crawford has their opinions about this, but imo a big turbo kit with NO BOV/BPV to vent throttle lift surge pressure is a very, very bad idea, especially for a street car. In my car if the BPV is even slightly tight, light throttle lift surge bucking becomes pronounced and gets worse with altitude gain as the vacuum drops. Frankly, I can't imagine what this will be like with that kit, not to mention the potential damage done to the turbo vanes and shafts as that pressure wave slams into them when the throttle plate shuts, or the loss in spool as the pressure waves stall the compressor wheel. It sure seems like a lose-lose deal to me.

I strongly disagree with this exclusion, and I can't think of another single kit made for any turbo'd street car that has no dedicated purge. But it's Crawford's kit, and that's what they believe is the best "solution": zero charge pipe venting, other than back out the front of the turbo compressor.

I'm not trying to crap on anyone, or pick any fights. This is just my $0.02. Other than this, the kit looks superb; but this exclusion is, as I've already said, astonishing to me.
flycaster is offline   Reply With Quote
Old 08-09-2007, 08:12 PM   #19
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Quote:
Originally Posted by flycaster View Post
Mod, I'm sure Crawford has their opinions about this, but imo a big turbo kit with NO BOV/BPV to vent throttle lift surge pressure is a very, very bad idea, especially for a street car. In my car if the BPV is even slightly tight, light throttle lift surge bucking becomes pronounced and gets worse with altitude gain as the vacuum drops. Frankly, I can't imagine what this will be like with that kit, not to mention the potential damage done to the turbo vanes and shafts as that pressure wave slams into them when the throttle plate shuts, or the loss in spool as the pressure waves stall the compressor wheel. It sure seems like a lose-lose deal to me.

I strongly disagree with this exclusion, and I can't think of another single kit made for any turbo'd street car that has no dedicated purge. But it's Crawford's kit, and that's what they believe is the best "solution": zero charge pipe venting, other than back out the front of the turbo compressor.

I'm not trying to crap on anyone, or pick any fights. This is just my $0.02. Other than this, the kit looks superb; but this exclusion is, as I've already said, astonishing to me.
Fly, I COMPLETELY understand. We talked about what is to happen and I guess I will just have to see it first hand.

When/If my turbo get damaged from it....hey, I have no life.....I will DEFINITELY post it up as part of my stupidity.

For now I am leaning on trust of the whole Crawford Performance team....(cause they all do it)
modaddict is offline   Reply With Quote
Old 08-09-2007, 08:23 PM   #20
flycaster
Scooby Specialist
 
Member#: 60142
Join Date: Apr 2004
Location: Bend, OR
Vehicle:
2011 WRX
Grey

Default

Like I said, amigo, there's no fight in me on this one. This is just flat bizarre to me. Maybe the Crawford folks will explain their theory on this one - I'm sure others would like to hear it as well.

edit: do we have any turbo engineers here that might like to weigh in on this?

Last edited by flycaster; 08-09-2007 at 08:30 PM.
flycaster is offline   Reply With Quote
Old 08-10-2007, 05:02 PM   #21
PERRIN
NASIOC Manufacturer
 
Member#: 6776
Join Date: May 2001
Chapter/Region: NWIC
Default

Hey folks: Good news on a lot of fronts with the PERRIN kit. We were able to determine that a handful of kits fit properly in the fixture so passed QC, then had problems mating to the wastegate as he described above. Additionally, the tail then hit the crossmember. Those problems have long since be addressed and current kits do NOT have this concern. In fact they are now welded and cooled with the wastegate in place to prevent any issues from post fixturing shrinkage. So again problem was VERY isolated (however this client certainly had an issue and we agree with his frustration.)

Mounting: as Freon mentioned above, if there was a problem you would have heard about welds cracking etc. Simply not an issue. However, to appease the big boys we are now making available a mounting bracket for some kits (Jeff is out of the office on business today, so I can't ask him) but it is either the 35R only or the 30R only. Sorry for not having all those details. Regardless, not one kit has ever been returned for a broken weld.

Intake: We now offer options but will eventually switch to the newer only. We can and have tuned VERY well with the MAF ahead of the turbo. I agree some folks have had difficulty but that should reflect on the part, only on that tuner and his/her comfort level. But for those interested in running blow-thru MAF and cold air and PERRIN FMIC, we have those intake systems in stock now for your rotated kits. Expect all the kits to switch to this version in about 4-6 weeks, however, can be retrofit to all kits produced.

Finally, we are ALWAYS here to help you. We WANT to help you and don't hide behind busy phone lines and un answered e-mails. Call me personally if you like, or Jeff. We are enthusiasts too!

Thanks again NASIOC members for the posts, the business and the honesty!

Adam
PERRIN is offline   Reply With Quote
Old 08-10-2007, 05:37 PM   #22
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Wow thanks Modaddict. That's a great and informative comparo.

I had no idea - but that Crawford kit looks top notch. Thanks for posting this.
SilverSurfer04STi is offline   Reply With Quote
Old 08-10-2007, 06:42 PM   #23
modaddict
Scooby Guru
 
Member#: 95840
Join Date: Sep 2005
Chapter/Region: NWIC
Location: Pasco, WA
Vehicle:
sold to a good bud
awaiting next car

Default

Adam, thanks for updating your kit. it looks like I was a little too early in getting one of these. I got it for a good price, so I don't really have any complaints. The kit worked..... 408whp is what Jarrad from PDX tuned me to.


I also realized I didn't post proof of my downpipe hitting the crossmember....

Here are to show some differences:


downpipe hitting crossmember:





You can see the worn spots on the wrap where it was hitting...2 or 3 places I believe
modaddict is offline   Reply With Quote
Old 08-10-2007, 07:37 PM   #24
SilverSurfer04STi
Scooby Specialist
 
Member#: 71542
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Midwest
Vehicle:
2013 WRB BRZ

Default

Quote:
Originally Posted by flycaster View Post
Like I said, amigo, there's no fight in me on this one. This is just flat bizarre to me. Maybe the Crawford folks will explain their theory on this one - I'm sure others would like to hear it as well.

edit: do we have any turbo engineers here that might like to weigh in on this?
I find this a bit odd also. I remember quite a while back when I saw a video of their race car and it wasn't making a BOV/BPV sound. I was sort of confused. Then somebody posted that the kit on the race car wasn't using one. Then I was more confused.

To date, I have never seen a posted explanation on why they do not use a BOV/BPV. However, I haven't heard of people breaking turbos on their kit either so maybe they know something we don't.

I agree Flycaster, not running some sort of pressure release for the charge air just makes me cringe. Only pro I can think of for doing this is the turbo might stay somewhat spooled between shifts (after that air slams back into the compressor when the throttle slams shut). Can't be good for turbo longevity vs running a pressure release...

Agreed again on the fact I cannot think of a single turbo kit for any type of car that doesn't use some sort of BOV/BPV.

Somebody please enlighten us.
SilverSurfer04STi is offline   Reply With Quote
Old 08-10-2007, 07:43 PM   #25
insaneSTI
Scooby Newbie
 
Member#: 63953
Join Date: Jun 2004
Location: NEW YORK
Vehicle:
04 STi
WR Blue

Default

I've never seen any one post a good 1/4 mile time really for any kit other than the UR kit.
insaneSTI is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
My new Perrin rotated kit and stealth front mount are in!!!! sgm_sti North West Impreza Club Forum -- NWIC 25 05-07-2010 05:48 PM
WTB: T31 Turbine Housing for GT3071R/GT3076R/GT35R theotherguy Private 'Wanted' Classifieds 2 11-29-2009 01:07 PM
Perrin Rotated Kit questions scoob4fun Factory 2.5L Turbo Powertrain 10 05-04-2006 01:40 PM
gauging interest perrin rotated kit west005 Private 'For Sale' Classifieds 23 04-19-2006 08:12 AM
Intake on Perrin rotated kits machemist Factory 2.5L Turbo Powertrain 21 04-10-2006 11:08 PM


All times are GMT -4. The time now is 08:27 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.