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Old 07-13-2006, 08:08 PM   #51
vtownrida
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WRB Cobb 2.5 VF34

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i love my cobb 2.5 vf34 setup.......i'll run this till it blows up and get a 2.5 block
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Old 07-14-2006, 03:05 AM   #52
boostedscooby2002
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UR Stage3 fmic vf34

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I see you guys are saying that we'd be hard pressed to get 300whp with a VF34 setup. I have an Ultimate Racing Stage 3 Turbo Kit which is supposedly making 318whp/310torque at 18psi on their dynojet awd dyno. Are these numbers believable? I tried to post a dyno graph but apparently i'm not allowed to post URLs yet as I still haven't hit 5 posts.

Here's the mods:

Ultimate Racing 3" Stainless Turbo-Back exhaust w/
Magnaflow Muffler
Cold Air intake w/K&N Filter
Ultimate Racing Up-Pipe
Ultimate Racing 3" Stainless Downpipe (Catless)
EcuTek Flashed ECU
Ultimate Racing 600cc Cylinder Flow-Matched Injectors
Walbro 255lph in tank Fuel Pump
IHI-VF34 Ball-Bearing Turbocharger w/ port and polish
Front-Mount Intercooler w/ Spearco core and Ultimate
Racing Pipes
HKS SSQV Blow-Off Valve
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Old 07-14-2006, 01:17 PM   #53
Assassin4457
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From what I've been reading in this post and others, is that whp varies widely depending on dynos and many other factors. I like looking at trap speeds really, what do you trap running that ?
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Old 07-14-2006, 01:29 PM   #54
boostedscooby2002
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UR Stage3 fmic vf34

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Yeah, That's what I am noticing. I know it feels really fast... but I don't have anything to compare it to. Maybe I'll have to take er to the track one day.
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Old 07-14-2006, 01:32 PM   #55
Tenacious Bee
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So, what to play
with next ?

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Quote:
Originally Posted by boostedscooby2002
I see you guys are saying that we'd be hard pressed to get 300whp with a VF34 setup. I have an Ultimate Racing Stage 3 Turbo Kit which is supposedly making 318whp/310torque at 18psi on their dynojet awd dyno. Are these numbers believable? I tried to post a dyno graph but apparently i'm not allowed to post URLs yet as I still haven't hit 5 posts.

Here's the mods:

Ultimate Racing 3" Stainless Turbo-Back exhaust w/
Magnaflow Muffler
Cold Air intake w/K&N Filter
Ultimate Racing Up-Pipe
Ultimate Racing 3" Stainless Downpipe (Catless)
EcuTek Flashed ECU
Ultimate Racing 600cc Cylinder Flow-Matched Injectors
Walbro 255lph in tank Fuel Pump
IHI-VF34 Ball-Bearing Turbocharger w/ port and polish
Front-Mount Intercooler w/ Spearco core and Ultimate
Racing Pipes
HKS SSQV Blow-Off Valve
Definitely believable. I am of the opinon that it is the exception to the rule but still possible. I have senn a few dyno plots to back that up. I have also seen 2.5 set ups making less than 250 whp. Thing is as Assassin points out all dynos read differently. The same dyno can read differently from one day to the next depending on conditions. Trap times are a good indicator of what is going on but then driver consistency comes into play.

How is your lag with the FMIC ?
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Old 07-14-2006, 01:46 PM   #56
boostedscooby2002
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UR Stage3 fmic vf34

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I get full boost by around 4k. Lag is really noticeable in higher gears though. I wish there was another way to post my dyno plot.
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Old 07-14-2006, 01:47 PM   #57
vlady
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I also have fmic with my 34, and lag is not an issue. I spool the same as I did before (19psi by 3700) and the motor loves it. It's dumping as much timing as possible due to the lower intake temps. I love it. Very smooth.
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Old 07-14-2006, 01:53 PM   #58
muskaroxs
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I have the hyperflow top mount and made 278 on a dyno dynamics dyno "vf34"
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Old 07-14-2006, 01:59 PM   #59
Tenacious Bee
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So, what to play
with next ?

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Quote:
Originally Posted by boostedscooby2002
I get full boost by around 4k. Lag is really noticeable in higher gears though. I wish there was another way to post my dyno plot.

You can scan it , save it as a jpeg, host it and use the image feature to post it.
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Old 07-14-2006, 02:00 PM   #60
Tenacious Bee
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So, what to play
with next ?

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Quote:
Originally Posted by vlady
I also have fmic with my 34, and lag is not an issue. I spool the same as I did before (19psi by 3700) and the motor loves it. It's dumping as much timing as possible due to the lower intake temps. I love it. Very smooth.
Great, thanks to both of you guys for the info.
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Old 07-14-2006, 02:01 PM   #61
boostedscooby2002
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UR Stage3 fmic vf34

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Quote:
Originally Posted by nitavern
You can scan it , save it as a jpeg, host it and use the image feature to post it.
Yes but I still haven't hit 5 posts yet. Forum will not allow me to post links.
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Old 07-14-2006, 02:16 PM   #62
boostedscooby2002
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hehehe.... I finally hit 5 posts!
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Old 07-14-2006, 02:18 PM   #63
Bort
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Quote:
Originally Posted by boostedscooby2002
Yes but I still haven't hit 5 posts yet. Forum will not allow me to post links.
At last count you're up to 7 posts

edit: Congrats, you made it
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Old 07-14-2006, 02:40 PM   #64
vlady
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Boosted: Is that your dyno run or is that the UR dyno plot?
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Old 07-14-2006, 02:52 PM   #65
boostedscooby2002
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UR Stage3 fmic vf34

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That is the UR dynoplot after they installed their stage 3 kit.
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Old 07-14-2006, 03:01 PM   #66
vlady
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Those numbers seem VERY high for pump gas and a vf34. That's usually 18G territory. But this again brings us to the fact that dyno numbers don't mean ****. Looks like a nice curve though...
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Old 07-14-2006, 03:46 PM   #67
Assassin4457
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Im seeing more people ask "hows your lag with the fmic" is the lag increase significant all the time? For my goal of 300whp (or close to it) should I stick to a top mount? (I would upgrade the stocker)

Low lag (good spool) is pretty important to me, thats why im staying fairly mild by choosing a 16G. I was innitially planning a FMIC, but if it kills the spool, I dont really think its a good idea.

What would you guys do if you were me? and if the FMIC hurts the spool, is it really significant ?

Vlady doesn't seem to have a problem. which fmic's are better for not affecting spool (minimal pressure loss is the term ? )

Last edited by Assassin4457; 07-14-2006 at 03:53 PM.
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Old 07-14-2006, 03:50 PM   #68
rishoboy6
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After you get tuned, there shouldn't be a huge difference in spool between a tmic and a fmic. a fmic will help you get more power tho.
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Old 07-14-2006, 03:55 PM   #69
Assassin4457
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Yeah i was after the extra cooling to perhaps push more boost, but I was afraid of killing the spool up. If you say its not significant im happy. Which FMIC do you guys reccommend for a 16G and a guy lookin to push 300whp ?
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Old 07-14-2006, 03:58 PM   #70
Assassin4457
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Quote:
Originally Posted by vlady
Those numbers seem VERY high for pump gas and a vf34. That's usually 18G territory. But this again brings us to the fact that dyno numbers don't mean ****. Looks like a nice curve though...
im no pro, but im noticing manufacturors like to exaggerate their dyno sheets when trying to sell a product.
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Old 07-14-2006, 04:00 PM   #71
vlady
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There are many variables that will affect spool in terms of a fmic. Piping size and core size are the major ones. I built my fmic with the intent on using it once I finish my 2.5l block and v8 heads. Therefore, I have a pretty big core (still smaller than the txs one) and 2.25 piping going from the turbo to the intercooler, then 2.75 from cold side of intercooler transitioning to 3in by the battery and onto the tb. This might seem large for a vf34, but I haven't noticed any more lag than before. Also, my timing has been affected by the cooler charge air and my car pulls all the way past 7500rpm. I'll have to get her on the dyno soon and tweak the ecu a little with the street tuner. I feel that I can run some more timing up top without det. Also, the lag that everybody refers to is only felt in 1st gear when building boost. Once you shift into second you'll be in the happy tq zone again and shouldn't have a problem with lag. If you do, you're not driving your car right.
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Old 07-14-2006, 04:08 PM   #72
Assassin4457
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Which would you recommend for a guy with my goals Vlady ?
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Old 07-14-2006, 04:15 PM   #73
vlady
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That all depends. Talk to your tuner. I did and came up with what I have now. It's good for what I have now (not ideal, but good) and will be perfect for when I get everything finished. I would say the smaller perrin, or if you're fine with tweaking a kit, save a boatload of money and get a ebay fmic.
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Old 07-14-2006, 05:19 PM   #74
Assassin4457
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Thanks again Vlady, and really thanks to all of you. I had no idea this thread would get so many responses with so much info. You all have saved me hours of time and I feel much more informed and knowledgeable after this. If you guys find yourselves in my neck of the woods, beers on me
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Old 07-14-2006, 08:47 PM   #75
boostedscooby2002
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My fmic already came with the car when I bought it.... so I don't know what kind of lag a stock subaru has. This is my fmic..... UR FMIC
Apparently from what I have been told... it has a spearco core. (That's my car on the product pictures page). It looks to be quite expensive though.
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