Driving me crazy trying to find right turbo...

[PSI NRG]

Ok, I've searched and searched, and searched for as much info as I can before posting this... I have found some good stuff but there's a few specific things I need to know.. So here it goes..

My goal: 400-450 AWHP on pump (94 octane)

My set up:

-Fully build bottom end
-Fp2 cams
-SMIM
- DSMlink
-660cc injectors (possibly upgrading to bigger if needed)
-Supporting mods

I can't decide on which turbo would be right for me, I'm mainly looking for something bolt-on, decent spool (3800-4000), and be good for a street car that will be daily driven.

I've looked into the GT30R...and the GT35R... Now this is were it gets confusing... each of these turbos comes in many different combinations as you may already know, like the gt30 can be in forms of the fp3052 and 65 along with the gt3071 or 76. Which is bolt on? And would I need a T3 manifold or a custom o2 housing for any of these? As for the GT35R... SBR makes a bolt on style of this turbo with a mitsu. housing or would a full garret be overkill? Ugh it's making my head hurt. Any advice on which would be the best turbo selection for my set up and goal woul be great I'd appreicate it!! Thanks!

 

[Thomas91169]

i think a bolt up gt30/35 would be great and can do more than your goal, which is good for later down the road.

also, get bigger injectors right off the bat with dsmlink. since its so easy to set the ecu for the bigger injectors, why not? if i get another dsm, dsmlink is the first order of business, with a fuel system to back up(the standard 255/afpr/850cc's), then id go from there.

 

[dalatinromeo]

I would def go with a FP3065 OR GT35R.

also, get bigger injectors right off the bat with dsmlink. since its so easy to set the ecu for the bigger injectors, why not?
(the standard 255/afpr/850cc's)

I would def do this.

 

[shleppy]

Whats your budget, you listed a few different options that will all cost differently. The slowboy bolt on turbos will be cheapist since you dont have to get a new o2 or external wastegate and it'll bolt right up. The fp stuff is excellent quality but will cost closer to 2grand since you need to get thier o2 and external wastegate. Going full garett will be most expensive since you will need a new exhaust manifold, o2 and a external wastegate. You will also need bigger injectors as already mentioned, plus think about getting a 4" intake.

 

[PSI NRG]

Thanks for the replys, as far as budget I'm already spending almost 8k on the built motor so... I,m trying to keep the cost down for the turbo as much has I can but, don't get me wrong I would much rather pay for a turbo that's going to last than something I will have problems with down the road.

 

[shleppy]

Talk to the guys at slowboy. You can do straight bolt-on gt30r or gt3076r internally gated if your really on a budget, or if you can afford get them with a external wastegate off the o2 housing for better boost control. That would be about the least expensive way to go with the turbos you mentioned that should get you your numbers and spool quickly too. With the injectors, I would sell your 650's and buy a used set of 850's. That way upgrading injectors would only cost you $20-40-it's how I upgraded for $20.

 

[VRMAN]

A GT35R is a BIG turbo to daily drive on and you are going to be off boost a lot on that turbo. On a built 2 litre, you won't see full boost near 3800rpms at all. I think you would be best off shooting for a GT30R for the 2.0L

Did you check on the BB 60trim that Speedfactor offers? Slightly smaller but you'll see full boost where you want and with the supporting mods, the power level you request will be where the 60trim can take you and for cheaper price too. Worth the look....

 

[Boosted98gsx]

if you just want 400-450, go with a bolt-on tried and true 50 trim. Either an AGP, PTE, or get a Green. They will get you to your mark w/o many problems.

 

[dalatinromeo]

if you can afford get them with a external wastegate off the o2 housing for better boost control. With the injectors, I would sell your 650's and buy a used set of 850's.

The best way to control boost is off the exhaust manifold not the O2 housing. I would def recommend going external high boost and internal don't mix well.

With the injectors, I would sell your 650's and buy a used set of 850's. That way upgrading injectors would only cost you $20-40-it's how I upgraded for $20.

I have to agree with him here get bigger injectors.

 

[shleppy]

I was thinking about his budget, since it should be cheaper to go external off the o2 then from the exhaust manifold. Plus forced performance seems to do fine off the o2 with the fp3052 and 3065 turbos.

 

[PSI NRG]

As for the external vs. internal wastegate I forgot to mention I already have a tial external wastegate from my old set up. If that helps slim down choices.

 

[Verticaljump1]

Why not go to full garrett? T3 manifolds are floating all over the place, and the o2 housing can be custom made our bought from agp and shearer. The T3 housings flow better than a mitsu bolt-on housing, so less backpressure and more power. I'd say a T04E 50-trim with a .63 a/r t3 housing and T31 turbine wheel will work out nicely. I really don't think you'd need anything more than a 50-trim to make that power. Forced performance turbos are awesome, but the housings still won't outflow a matched T3 housing, plus the price is insane. I wouldn't think ballbearing is necessary, but it's up to you on that one. 50-trim will do the trick, as it's done it for a gillion others, yes, a gillion

 

[92awddsm]

I was thinking about his budget, since it should be cheaper to go external off the o2 then from the exhaust manifold. Plus forced performance seems to do fine off the o2 with the fp3052 and 3065 turbos.

The new sbr cast manifold isnt much more than a wg flanged o2 housing. The manifold mounted wg will fit into his budget, especially since he already has a tial wg.

 

[shleppy]

Your right, that will work just fine, and now he dosen't have to pay 125 extra for the internal gate.

 

[dalatinromeo]

Plus forced performance seems to do fine off the o2 with the fp3052 and 3065 turbos.

The WG is not off the O2 on the FP3052 and FP3065 they're off the actually turbo itself. You can see it off their website here the link of the turbo and the WG attached to it. http://linux.forcedperformance.net/merchant2/graphics/00000001/full/NTFP3052_full.jpg

But yes it is cheaper to go internal, but is not a good idea when the goal like this guy stated was 400-450 AWHP.

The new sbr cast manifold isnt much more than a wg flanged o2 housing. The manifold mounted wg will fit into his budget, especially since he already has a tial wg.

Good point, I was going to bring up the same point

 

[shleppy]

There's no real difference with what fp is doing with the external wastegate off the wastegate mount on the turbine housing, and a regular external wastegate off the o2 dumped to the atmosphere. In both cases it's pretty much just a short tube from the turbine to the external wastegate and then a tube releasing the exhaust gases towards the ground. And as I said I agree, going off the manifold would work well and be cost effective since he's now told us he already has a external wastegate. I was merely listing his options which is what he originally requested, not just telling him what the best options are.

 

[PSI NRG]

So I think I've decided on the turbo!!!


I'm almost 100% positive I will run the SBR GT-13 Flows 60lbs/min with a spool around 4300 rpms supports 560hp so I think this will be the perfect turbo that will get me 400-450 on pump and pretty much anything in the 500's on race Thanks to everyone for the replies!!

 

[shleppy]

bigger then I went, but you should make awesome power with high boost and race fuel. did you talk to the guys at slowboy to make your decision?

 

[PSI NRG]

bigger then I went, but you should make awesome power with high boost and race fuel. did you talk to the guys at slowboy to make your decision?

Haha, actually I talked to alot of people. I just spent half the day making phone calls to different shops and got their opinions and kinda narrowed down my choices then just picked the one I thought would fit my style of driving and horsepower range. I talked to AMS, Slowboy, Switzer, Buschur... they all had different options but I learned alot which helped me a ton, best advice I can tell others about making a turbo decision is do your homework it makes it so much easier and you will be much happier in the end. Pretty much I needed a turbo that flowed alot of air but had a moderate spool mostly because of the high whp number I wanted and the fact that its a daily driven street car and most of the time If I will be racing people on the freeway so I wanted better top end which the larger compressor side would support.

I'll be sure to keep you guys updated on the kind of numbers I put down

 

[shleppy]

Sounds good, you know we both just got gt30r based turbos from slowboy, and we both have the exact same platform(96 tsi awd). Why don't you fill out your profile so I can see what you've done with your car. It will be interesting to see what kind of numbers we lay down on the dyno and on the track this year.

 

[PSI NRG]

Updated profile, might have forgot a few things but most of the important studd is there

 

[shleppy]

Wow! Pretty impressive. The only change I would make would be to move up to bigger injectors to keep your duty cycles down. You should have no problem making big power with your setup. Since you already have the slowboy tubular manifold, where are you going to run your tial from?

 

[PSI NRG]

Wow! Pretty impressive. The only change I would make would be to move up to bigger injectors to keep your duty cycles down. You should have no problem making big power with your setup. Since you already have the slowboy tubular manifold, where are you going to run your tial from?

Same as where it was with my last turbo, off the turbo, I have a custom o2 that allows me to bolt up a tial wastegate and then recirc it back in to the o2 housing. I think SBR makes them, I dont know where mines from it came with my old gt28 turbo set up. And since the GT13 is a mitsu housing there was no need to buy the manifold with the wastegate flange since everything swaps over from the old setup. I just wanted a tubular mani cause they flow a little better and they look sick I've dropped so much money it to this set up might as well go all out!!

As for injectors I was told by buschur and slowboy that those should be fine, but I'll look into it, what size would you suggest?

 

[shleppy]

Those are nice o2 housings. I know fp makes them for something like 600. Well I'm running 850's, but my turbo only flows 53lbs of air. Most people recommend 950-1000cc range for longevity with a setup like yours-not because the injectors that they recommended can't flow enough for that turbo. You might be able to sell them and by bigger ones for the same price-thats how I went from 650's to 850's.

 

[PSI NRG]

Do you have any numbers from your set up yet?