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Old 04-10-2007, 09:33 PM   #26
cnstman
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Chapter/Region: RMIC
Location: Colorado Springs
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how much to coat the housings on a gt-35r (.82 exahust housing) what is the turn around when you just coat the housings?
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Old 04-10-2007, 10:01 PM   #27
Crucial Racing
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JDM RA tranny & '04 FXT

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Turn around would be a week to week-and-a-half from the time it arrives here until they ship back out to you. Not exactly sure on cost since we very rarely do just coatings... usually it's the entire P&P&C package and there is P&P work that is effective on the GT30/35 turbos. For just coating it'll come in somewhere in the range of $150 to $200... Please e-mail me at CrucialRacing@gmail.com if you need a more accurate quote than that and I'll work one up for you.

Thanks.

Jeremy
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Old 04-18-2007, 01:25 PM   #28
fatcircles
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Where exactly in the Bay Area are you located?
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Old 04-18-2007, 01:34 PM   #29
Crucial Racing
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Crucial is in San Francisco. I can likely meet you in the South Bay somewhere though to pick up/drop off the turbo, as I drive down there once a week. The shop that does most of our coatings is in the San Jose area.

Please e-mail (crucialracing@gmail.com) if you want to set something up. I'll be driving down there tomorrow! Otherwise, of course, you're welcome to come by the shop here and drop stuff off.

Jeremy
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Old 04-20-2007, 01:36 AM   #30
jabba827
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JBP

Default tgv's

do you also pnp and coat tgv's? i have a set that i'm thinking about having this done to. how much for such a service? also, would you know if tgv's from an 02 wrx would fit my 04 wrx? thanks.
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Old 04-20-2007, 01:21 PM   #31
Crucial Racing
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Yeah we P&P TGV's.

Can't think of any reason whatsoever to coat them though, although we have in the past for a couple of customers who just wanted them black... although even that's pushing it since you can barely see them when they're installed. There's just no coating that would be functional on them. Since they bolt directly to the cylinder heads they're going to get really hot whether or not they're coated... simply doesn't matter. If you barrier coat them, all they're going to do is retain even more heat than they might have before. The coating I would consider doing is the thermal dispersant coating that we do on intercoolers, radiators, cylinder heads, oil pans, brake calipers/rotors, etc... anything that you want to dissipate heat as quickly as possible. Can improve the efficiency of an intercooler or radiator or the like by up to 20% and it really does work! However... it needs airflow to function. The TGVs don't get a lot of air flowing over the outside of them because of their location in the engine bay and because they're surrounded by all sorts of other stuff. It just wouldn't be functional.

^^^ so.... don't waste your money on coating them $0.02

What we do is a FULL P&P on the TGVs. The rods get taken out, the dividers get ported out, the TGV's get gasket matched to the intake port gaskets and absolutely everything inside of the TGV is ported smooth and then it is professionally finished with the correct texture. ALSO... the holes where the rods used to be are first TIG welded shut and the weld is ported smooth. No crappy "plugs" screwed into the outside holes . These puppies are welded solid before the porting is done.

It's $200 and that includes return shipping to you and the welding, etc.

All of the top-feed injector cars (WRX) have identical TGVs.

Jeremy



This is near the beginning of the process... the TGV's have been fully roughed out at this point. You can see there are NO holes from the rods (on the inside sides or external wall sides of the runners)... they were TIG welded shut and then ported smooth.



This is a finished product


Last edited by Crucial Racing; 04-20-2007 at 01:27 PM.
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Old 04-20-2007, 02:07 PM   #32
jabba827
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as always, a thorough explanation....thanks, jeremy...i'll be sending out my tgv's when i'm ready!!
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Old 04-20-2007, 06:06 PM   #33
jabba827
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Default gaskets

jeremy, what sort of gaskets will i need to get when i have my tgv's put back on? where can i buy? thanks.
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Old 04-20-2007, 06:36 PM   #34
jabba827
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with the tgv porting, is it absolutely necessary to port the intake manifold, too? thanks....
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Old 04-20-2007, 07:45 PM   #35
Crucial Racing
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'98 EJ20 Legacy w/
JDM RA tranny & '04 FXT

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No, we don't touch the intake manifold unless the customer really wants it for some reason. The diameter is already just fine... already a touch larger than the gasket that goes between it and the TGVs actually... and there's nothing wrong with the casting. Besides, the IM already flows WAY more air than the cylinder heads anyway so porting isn't going to do anything. What it needs is a larger plenum and runners that flow even amounts of air but that's not anything that light porting can fix. IIRC each pair of intake ports flows a maximum of like 240 cfm and the average flow for each IM runner is like 308... they don't need help.

So, when people ask -- and we actually get asked about IM porting semi often -- I usually tell them to save their money and put it somewhere where it will actually do something. There's nothing restrictive in the intake manifold. It's just the TGVs

But dispersant coating them can be very sexy ... the particular one in this picture I did for Crucial's Forester XT but never put it on before I sold the car. I had some time on my hands so I actually did port it (just smoothed the inside out really... not much else to do to these anyway), dispersant coated the outside, and barrier coated the inside. The barrier on the inside was in the hope that the metal, which is going to get super hot because it's physically connected to the cylinder heads, wont radiate its heat into the intake air as much because it has the barrier coat on the inside. In theory, it should be pretty darn effective. The dispersant on the outside will help it radiate heat and the intake manifold gets a bit of airflow around it but not great, so that's probably not hugely effective.

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Old 04-20-2007, 09:41 PM   #36
jabba827
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and the gaskets for the tgv? where can i buy them at? thanks.
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Old 04-21-2007, 01:20 PM   #37
Crucial Racing
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JDM RA tranny & '04 FXT

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Any Subaru dealership or www.SubaruGenuineParts.com ....I forget which is top and which is bottom, but the part numbers are 14035AA421 and 14075AA160 and you need two of each...

Jeremy
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Old 04-21-2007, 03:56 PM   #38
WRXtasy05
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Jeremy,
I get stupid amounts of turbo lag with my td04 (more than usual)... I know you were saying back in the first couple posts that it wouldn't make a big enough difference to spend that kind of money for. But I really think it might, let me know what you think.

Chris
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Old 04-21-2007, 04:12 PM   #39
Crucial Racing
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Well.... each setup is different. However, I'm inclined to think that if you have so much lag with the TD04 either:

1) the turbo is bad. bearings, seals, wastegate isn't sealing... something... but there's something physically wrong with it. Because if everything else is okay, it's a small turbo and should be extremely responsive.

2) there's a boost control issue like a leak somewhere or cracked hose, or the solenoid is bad

3) very large uppipe or headers leak.


...and don't get me wrong, we've done a handful of TD04's and I'm not against it. It still does help and they come out very nice. Plus just dropping engine bay temps helps out, too. It just doesn't have the bang for the buck as larger turbos, which see a bigger improvement in spool/response really just because they have more room to be improved in that department... still happy to P&P&C it for you though if it seems that the things in 1, 2, and 3 above aren't a potential problem on your car, but they're worth checking.

Jeremy
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Old 04-22-2007, 09:54 AM   #40
WRXtasy05
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I brought the car in to my local dealership and they just told me it was a normal amount of lag. I'm wondering if I'm just in need of more power or if I'm just going nuts or who knows??

Chris
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Old 04-24-2007, 01:01 PM   #41
squashman
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Hey Jeremy, I sent you an email. Thanks, MG.

ps. if you read this before you read the email, add in the cost of drilling and welding in a threaded EGT bung
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Old 06-01-2007, 06:37 PM   #42
Crucial Racing
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Hey guys, time for a bump!

We've done lots of turbos for the NASIOC crew and they all looked great when they left!!! Anybody have installed pictures and/or reviews?

Jeremy
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Old 06-01-2007, 09:59 PM   #43
FiveLimaCinco
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PM sent...
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Old 06-15-2007, 09:51 AM   #44
El Supremo
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Default Has Crucial Racing ever worked on an APS SR-30 turbo?

Hello,

Has Crucial Racing ever worked on an APS SR-30 turbo? They're suppose to be pretty efficient, but like you said on the various posts, every turbo can be improved. The APS SR-30 is slightly larger (50 cfm or so) than the vf-34 and cost close to twice as much. Just wondering if you had any feedback (positive or negative) from customers regarding this turbo.

Thanks,

Supremo

Last edited by El Supremo; 07-03-2007 at 11:48 PM.
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Old 06-15-2007, 05:08 PM   #45
Crucial Racing
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Supremo --

Yes, we've done a couple of SR-30's and a few other APS turbos as well. They're okay. The castings are a bit on the thin side, especially the compressor casting, but they clean up nicely. The cartridges are good. Garrett I believe. There are people making very good power with these turbos. I think more than a lot of other turbos like the VF34, the SR likes to be run in a fairly specific psi range and it likes to be tuned a specific way, whereas a VF and some others are more forgiving. ...I say this because I've seen larger variances in spool and power output with the SR turbos vs most others, which seem to make more consistent numbers, and the SR ones that do very well all tend to be tuned similarly.

Anyway, they are nice turbos. They absolutely do benefit from P&P&C.

Jeremy
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Old 06-15-2007, 06:06 PM   #46
El Supremo
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Great information and knowledge shown here. Yes, the SR-30 is a Garrett hybrid. I've seen the SR-30 make close to 300whp when tuned by the right person. While others barely get 240whp on a standard generic, Mc Donald's type tune. I've talked to five different tuners regarding this unit and I've responses from "great turbo" to "I'm not impressed at all by this turbo and you could have done better for the money spent"
Anyway, I just wasn't sure how this enigmatic turbo would react to a P&P&C, however it does sound promising.

The turn-around time is about two weeks? I live in Chico, Ca so it might be a shorter time at least delivery wise.

Again thanks for the insight,

Supremo
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Old 06-15-2007, 08:02 PM   #47
Crucial Racing
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Yes, although the two week turn-around is really from when it arrives to when it ships back out... shipping time isn't factored into that. Luckily, FedEx Ground from here to Chico is probably 1 day and very inexpensive.


...and yes, some turbos do respond better to the P&P than others. There are various reasons, but mostly it comes down to the castings. Some castings are extremely good, like higher end Garrett turbos. They are already very smooth on the inside and there is very minimal crap where the parts of the castings are joined together (small seams, flashing, etc). Then there are castings that flat-out suck. I wont name names, but we've had a couple turbos from a particular company (expensive ones, at that!) that makes/brands/uses their own castings and they are REALLY rough on the inside... like freakin' 40 grit sandpaper . Obviously, this type of turbo is going to have a larger before-and-after than a really good Garrett. That doesn't mean the Garrett doesn't benefit, because it does. It's just not as dramatic. The coating ALWAYS helps.


I've had a couple people ask about only coating or only porting. We REALLY push to do this as a package. Let's say the coating = 1 and the porting = 1. Seems it's assumed that when you put those together you come up with 2. But... it's really not quite the case. They both affect the turbo in different ways but they affect each other, too, and they work together to increase efficiency in different ways. In this case, 1+1 might = more like 2.2.... that is to say, there's something extra that's gained when you do both because they compliment each other, and doing only one of the two will likely net you less than half of the results, not half. Does that make any sense ?

^^^ that said, if you really really only want porting or only want coating, we can do that. It's always the customer's decision and we respect that! But *cough* do the whole package *cough*!

Jeremy
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Old 07-04-2007, 06:39 AM   #48
Spenk
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I had my p/p/c TD04 from Crucial tuned yesterday. The results were fantastic!

14psi@2400
20.3psi@3150
holds 19.4psi from 3300 to 5000
down to 16psi@6000
14psi@redline

Mike at Innovative Tuning in Buffalo was impressed with the turbo. I asked him to take the new turbo to the edge to see what it can do, and then ratchet it back a couple of notches to keep it reliable for my DD car. He said he's never seen a TD04 consistently make that much boost. The car pulls like a train, and the throttle/boost response is just perfect --> you push the go pedal, and it just pulls, even in 5th gear.

Obviously, I'm very pleased with this turbo. Even though Jeremy doesn't really suggest his service for this small of a turbo, IMO it's totally worth it. For a street-driven car, it's a LOT of fun, and the power is everywhere without being rediculous --> I'm getting the midrange of a smallblock V8 without having to worry about borking the tranny. I will be sending my stock TD04 (the one I replaced with the Crucial turbo) to Crucial for the same treatment.

Thanks again, Jeremy!
Spence

Last edited by Spenk; 07-04-2007 at 09:28 PM.
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Old 07-05-2007, 12:01 AM   #49
El Supremo
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Spenk,

I didn't know you could buy a stock TD04 with a CR P&P&C job already done to it outright from Crucial Racing. How much of a deposit (refundable usually) did you had to leave until you sent the original stock unit back to Crucial? I thought he was short on stock TD04's and wasn't doing swaps or didn't want to do stockers in general because of the lack of the "Bang for the Buck" factor.

Did you own two stockers to start with?

Supremo

Last edited by El Supremo; 07-05-2007 at 12:14 AM.
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Old 07-05-2007, 04:15 PM   #50
Spenk
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I had the stock turbo on my car. I bought an unmolested TD04 and sent it to Crucial. I then replaced my stock TD04 with the Crucial TD04. My next move is to send my original (stock) turbo to Jeremy.
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