dabigesii

iTrader: (4)

I'm finally about to jump up to the big dogs, before I make my decision I need some info though. I'm trying to make around 400-450whp on my single setup while still maintaining drivability aka no horribly long lag times. Out of these turbos which would be best suited for my goals - garret to4e .84 a/r undivided turbine. 50 trim compressor wheel with 3 inch inlet, garret to4r .70 AR compressor side with a 1.0 hotside, and maybe a gt35r...not sure on specs yet. Which one of these turbo setups would be good for my application. I have new motor with 12k miles on it, 550/1200cc injectors, walboro 255 fuel pump, apexi power fc, exedy twinplate clutch, M2 Large SMIC, highflow cat (may switch to midpipe), and greddy power extreme catback. Just to recap I want a streetable (not rediculously long lag times aka 5000rpm full boost or anything close to that) 400-450whp on stockported engine. If possible please give me an estimate on spool time if you have experience with any of these setups. Thanks in advance.

twomucboost4u

iTrader: (9)

On stock ports with my gt35 @15lbs I made 380 had to stop tuning because I wire got ripped. I would say get with a-spec they now how a divided t4 gt35r that i think would suit your needs perectly. spool time... I had full boost by 3500

Chris

Gorilla RE

iTrader: (1)

Comparing a "TO4E .84 with a 50 comp" and and a "TO4R 1.0 with a .70 comp" is apples and oranges. Also 550/1200cc is not enough injector for 450rwhp.
-J

p.s. You have an M2 large SMIC?.....Man those are rare how did you get it?

dabigesii

iTrader: (4)

450whp is not necessary, I also still have another set of 850cc injectors that I could upgrade my primaries to if needed. I honestly just want to get to 400whp and I'd be more then happy. The three turbos are completely different...I realize that but that is what I'm working with right now. Thanks for the input...keep them coming please.

turbodrx7

iTrader: (43)

I made 386 rwhp on stock ports with a gt40r on 15psi, 400 is capable, just takes some tuning. I had 10psi by probably 4200 rpm and that was with a large exhaust housing, 1.06.

-Austin

dabigesii

iTrader: (4)

I think I'm leaning towards the garret to4e .84 a/r undivided turbine. 50 trim compressor wheel with 3 inch inlet because of my stock ports. My question is would I still be able to achieve my 400whp goal with this setup? O and from what the guy was telling me this turbo is dual ballbearing which should help out substantially for drivability.

sk8world

iTrader: (5)

I used a 40r with .85 back on my stock ports. I do not remember the lower boost amount but it made 430 around 19psi. I went this way as it left room to grow. It seems everyone wants more power sooner or later. So I always sugest running something that gets you were you want to be but has more power left to be pulled later when wanted..

Turblown

iTrader: (12)

I'm not sure 400rwhp is doable on a 50 trim. I believe I was close once at 23psi on one. However it requires you to really fine tune your complete setup, and really tune the engine to the edge. Definitely requires water/methanol injection, ignition upgrades, very smooth free flowing intake, exhaust, and charge-piping, along with a well built motor( even its a stock port, just a well built engine, not your used rotor housings low compression bs). You're going to need a much bigger turbine housing with that compressor to make 400rwhp. Exhaust restriction costs power. The " highflow" cat is also going to hurt power and spool time. So unless you want a really loud car I would just suggest you use something in the middle ground between a 50 trim and a to4R.

dabigesii

iTrader: (4)

Very good point. Thanks for this advice. I'm now leaning more towards to4r, but really want the gt35r (I just can't find the right deal on one right now). I will most likely switch to a midpipe instead of keeping the highflow cat to help spooltime. My motor is brand new (have the reciepts to prove it lol), so I'm not worried about that part at all. Just as a reference on my nonsequential turbos I get full boost 14psi at around 3600-4000 on very hot days...and 3000rpm rpm right now on cooler days. Keep the suggestions coming guys.

Turblown

iTrader: (12)

Seriously, receipts don't mean anything. Do a compression test. I see a car almost every two weeks with a " fresh" engine that is a complete half assed monkey rebuild. You know what really scares people is when I tell them in the past two years, I have only rebuilt engines that are fresh from other shops.

I deal with 50 trim turbos a lot, so I'm not talking out of my *** either. I would highly recommend staying away from a To4R if you don't like "lag". Don't fool yourself either, you can't make mis-match a big compressor wheel with a small turbo housing in effect to get the best of both worlds( big power, low boost-threshold) I would just stick with a middle of the pack turbo unless you have the patience to maximize every part of the system.

Really you should just wait until you can afford to do it right the first time, its cost a lot more in the end to cut corners and do things 2, 3 or 4 times.

classicauto

iTrader: (3)

Truth right there. My deflated wallet can attest to that!!!

dabigesii

iTrader: (4)

Thanks guys for all the advice, I finally decided and bought a GT35R kit. T3 GT35r Turbo 70trim compressor 1.06 ceramic coated hotside, polished cold side ceramic coated manifold, PSR 45mm wastegate (rerouted back to downpipe), and 3 inch downpipe (it arrived today). I also decided I might as well replace my 550cc injectors with my spare set of 850cc injectors. The only thing I have left to get is an hks twinpower. I can't wait to put this thing on and get it tuned (in between school and work...its extremely hard to find some spare time)!!! Once again, thanks for all the advice...I will be visiting here more often now .

mono4lamar

iTrader: (32)

My R85 kit is for sale. On stock ports it made 406whp on 16lbs of boost...