nebulight

My goals are to reach 600whp with this setup: Ls/vtec, stock sleeves, 9:1 pistons, eagle rods, skunk2 valvesprings/retainers, ITR cams, FR cam gears, edelbrock IM, 70mm tb.

These two turbos are so close to each other in power ratings, it makes me wonder if it's worth it to step up to the GT4088R over a GT35R with my power goals. Either one I go with, it will be a divided housing with a full-race top mount dual wastegate setup. I personally don't have much experience on the divided setup, however I do read that it can help with spool up because of the directed pulses to the turbine. The GT35R would be a .78 t3 housing that you can get from Evans tuning because it's the only divided housing you can get with a t3 frame. But my worries are if you can get to 600whp with a .78 t3 frame. My other concern is if I get a t3 framed manifold if I'm going to be limiting myself later on if I want to do more with this car.

However, my goals for this car are quicker spool, which is why I'd go with a divided setup. This won't be a daily driven car due to the theft of my previous turbo setup:

http://forums.evans-tuning.com...=4048

But I really liked the powerband of that car which is making me lean a little towards to the GT35R with the smaller housing. Thanks for any info




GT35R "rated" at 600hp:

Compressor Trim: 56
Compressor Inducer: 61mm
Compressor Exducer: 82mm
Turbine Trim: 84
Turbine Inducer: 68mm
Turbine Exducer: 62mm



GT40R "rated" at 700hp:

Compressor Trim: 52
Compressor Inducer: 72mm
Compressor Exducer: 88mm
Turbine Trim: 78
Turbine Inducer: 77mm
Turbine Exducer: 68mm

atec

U cant go wrong with the new Gt3567R

nebulight

I've heard mixed things about that turbo.

Turbo-charged

i made 616 on a 35r
i made 675 on a 40r
i made 859 on a 42r

id personally go with a 40r for 600 so you dont have to push everything as hard. over laying my 2 dyno charts of the 35 and the 40, rapid power hapens nearly at the same rpm, but obviously the 40r takes off and makes more power...but also holds the power out higher in the rpm band. however the 35r made more power off boost (another words if you hit the throttle around 3k rpm on the dyno)

nebulight

Thanks for the info, it looks like it's GT4088R for me!

bigbadboy

go with the 35R. the spool will be so much better specially with the divided collector.

a1320addict

iTrader: (1)

The 35r is also available with a T4 housing, giving you the room to grow with the setup.

What type of driving will you be doing most with the car?

nebulight

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by a1320addict &raquo;</TD></TR><TR><TD CLASS="quote">The 35r is also available with a T4 housing, giving you the room to grow with the setup.

What type of driving will you be doing most with the car? </TD></TR></TABLE>

Strip and highway pulls.

tokesGTR

The GT35R will do 650 WHP, more than you need. Get it with a divided T4 housing and you're good to go.

zexxbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nebulight &raquo;</TD></TR><TR><TD CLASS="quote">My goals are to reach 600whp with this setup: Ls/vtec, stock sleeves, 9:1 pistons, eagle rods, skunk2 valvesprings/retainers, ITR cams, FR cam gears, edelbrock IM, 70mm tb. </TD></TR></TABLE>

am i the only one that saw this? errrrr, how long are you planning on this motor lasting? the gt35 will hit your goals, the gt40 wont spool until much later even with a divided housing, but that would be the least of my worries while running either on stock sleeves

hovic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tokes1320 &raquo;</TD></TR><TR><TD CLASS="quote">The GT35R will do 650 WHP, more than you need. Get it with a divided T4 housing and you're good to go.</TD></TR></TABLE>

I´m in the same situation like this guy. I´v never seen a 35R with a divided T4 housing. Only T3...

White Smoke

I'd go with the 35R since your already going to be pushing those sleeves past the limit.

93supercoupe

I concur, HERE HERE!!!

Really 35r.

tepid1

GT66

Andrea

A .78a/r divided T3 housing is entirely too small. The a/r on a divided housing is misleading in comparison to undivided a/r hosuings. The space taken up by the divder in the housing decreases the internal volume of the housing. The .78a/r divided housing is not in between a .63a/r and a .82a/r undivided in terms of size. It's actually much closer to a .48a/r (for comparison purposes), which is why backpressure goes through the roof, turbine efficiency goes way down, and power/spool suffer. We've seen the divided 30R spool terribly, make crappy power, and run slow at the track on Hondas. Garrett never designed the 35R turbine wheel to work with a divided housing (although it will with a much larger divided housing). If you do get a GT40R, go with the 1.06a/r housing as the turbo will spool faster than the .85 and .95 as well as make more power and have better response.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zeimbo &raquo;</TD></TR><TR><TD CLASS="quote">am i the only one that saw this? errrrr, how long are you planning on this motor lasting? the gt35 will hit your goals, the gt40 wont spool until much later even with a divided housing, but that would be the least of my worries while running either on stock sleeves</TD></TR></TABLE>

I ran a GT35R .82a/r turbo on my stock sleeve piston/rod motor for two years. As long as I shifted every gear right and didn't have problems with the tranny, I'd run a consistant 138-142mph (depending on air, track conditions, etc.). Most of our customers that are running the GT35R usually trap about the same mph and a lot of them are running stock sleeves. It's definitely not fool proof, but it can (and has been) be done.

nebulight

Thanks for the input Andrea, just out of curiosity, can you get the GT35R with a divided T4 housing? I've never seen one, but since you guys sell GT turbos you might have access to more info. Also, would you even recommend a divided housing on that turbo?

nebulight

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepid1 &raquo;</TD></TR><TR><TD CLASS="quote">GT66 </TD></TR></TABLE>

I'm not sure if I'm ready to jump off the divided bandwagon just yet.

tepid1

It has its pro's and con's....

Both are good. I think Andrea summed it up rather well actually.

Andrea

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nebulight &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the input Andrea, just out of curiosity, can you get the GT35R with a divided T4 housing? I've never seen one, but since you guys sell GT turbos you might have access to more info. Also, would you even recommend a divided housing on that turbo?</TD></TR></TABLE>

I can get you a divided housing, but we haven't really seen that much of a gain from using a T4 housing on a GT35R over a T3 housing. If you are going to go with a T4 frame turbo, go with either the T4/T67 bb turbo or the GT4088R. The T4/t67 bb will spool about the same as the GT4088R, but is capable of supporting a bit more power.

TDautowerkes

well if you want to stay t3 then the gt40 is out of the question......

the .63 gt35r will make 600 is the sleeves hold up.....

save the $ on the 2nd wastegate and other things you dont need like a divided manifold and spend $ on some sleeves!

vti2

Does anibody tried the Precision GT3767S?
I´ve heard it makes alot of power and has also a good spool.

zexxbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrea &raquo;</TD></TR><TR><TD CLASS="quote">I ran a GT35R .82a/r turbo on my stock sleeve piston/rod motor for two years. As long as I shifted every gear right and didn't have problems with the tranny, I'd run a consistant 138-142mph (depending on air, track conditions, etc.). Most of our customers that are running the GT35R usually trap about the same mph and a lot of them are running stock sleeves. It's definitely not fool proof, but it can (and has been) be done.</TD></TR></TABLE>

ok well you can run a gt42r on a stock sleeve b16 as well, but youre only gonna be boosting like 10 lbs or less. how much horsepower were you putting out? i know that the stock honda sleeves can take some abuse, but this guys wanting 600whp which is a lot of abuse for stock sleeves. it doesnt sound like his setup is gonna be a daily driven 350whp car with a scrambler for 25psi, it sounds like its getting tuned for strictly 600whp and track/freeway pulls, hence debating over getting the 40r. also, hes worried about boost creep with the manifold hes getting, so id hate to see the aftermath of a 35r spiking past 25psi on stock sleeves.

nebulight

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zeimbo &raquo;</TD></TR><TR><TD CLASS="quote">

ok well you can run a gt42r on a stock sleeve b16 as well, but youre only gonna be boosting like 10 lbs or less. how much horsepower were you putting out? i know that the stock honda sleeves can take some abuse, but this guys wanting 600whp which is a lot of abuse for stock sleeves. it doesnt sound like his setup is gonna be a daily driven 350whp car with a scrambler for 25psi, it sounds like its getting tuned for strictly 600whp and track/freeway pulls, hence debating over getting the 40r. also, hes worried about boost creep with the manifold hes getting, so id hate to see the aftermath of a 35r spiking past 25psi on stock sleeves.</TD></TR></TABLE>

She was running 28psi on her stock sleeve setup to my knowledge, and putting down some serious numbers:



This car may be tuned for C16 strictly, so running high boost won't be an issue.

timg

I tried to buy that turbo last year. It seems like Precision made a limited run of them and will make no more.

Tim

vti2

I have one myself, i will try it this sommer. I´ve heard it is one of the best turbos out there, and it has a T3 exhaust.