I am running a fully built h22 but I have a question as to when boost will start building. Comparing T4 GT35R .63 a/r hotside vs. T4/T67 GTQ .68 a/r hotside. I plan on running a Lovefab Sidewinder V1 manifold.

H22a4
-Benson Sleeves
-CP 9:1
-Manley Rods
-Ported head w/ Supertech Valvetrain
-Skunk2 Intake Manifold

I am shooting for 700+hp. Any advice would be greatly appreciated. TIA

 

BTW what size throttle body should I run? I have 2.5 in intercooler piping.

 

Looks like you're building a street car. How much do you want to spend? I don't think either of these turbos will make 700 to the wheel that efficiently. Correct me if i'm wrong. From what everyone is talking, the 35R would be the way to go for a street car.

 

67/gtq would do 700whp. The gt35R is limited to about 650whp.

 

We've made 750 WHP on a supra with a 67-GTQ, and I think it still had a bit more to give. 730 WHP has been made on a T3/T67 HO, so I'd think that's very attainable with a full T4 frame T67 with a better exhaust wheel.

 

the gt35r is good to 620 crank hp (per garrett) and will spool a whole hell of a lot quicker than the t4/t67.

if spool is what you are looking for, go with the 35r, if ultimate power is the goal, t4t67

 

Thanks for the replies. Spool is not my main concern but I just wanted a general idea as to when each will start building boost. What size throttle body should I use with this setup (my intercooler piping is 2.5 in). Thanks for your help.

 

bump for more suggestions for throttle body

 

67mm Max Out around 700-730whp Depending on Combination.

GT35R Maxes at around 600-650whp...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by noob101 &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the replies. Spool is not my main concern but I just wanted a general idea as to when each will start building boost. What size throttle body should I use with this setup (my intercooler piping is 2.5 in). Thanks for your help.</TD></TR></TABLE>

if spool is your main concern, the gtq is not the wheel you probably should be looking at... it will provide you with a very low backpressure and low shaft speed, if thats what you're after

 

Just to give you a comparison on a 2.0L B series with a P-Trim wheel PT67 with a .68A/R I made 632Whp at 27Psi, it may have been more but the car would not hook on the dyno after 6500Rpm.

Brian

 

even the T4 version of the 35R only makes 650??? please clear this up for me guys.

 

At what RPM did you start building boost on your 2.0L? BTW can someone recommend me what size throttle body should I use?

 

bump for more replies and suggestion on throttle body

 

i am using a 74mm tb on my build and i had my jg intake manifold ported to match my throttle body. i would use at least a 70mm if your goal is 700whp.

 

I am shooting for 700+ but I have a Skunk2 IM. I didn't measure the opening of the IM but I thought if you have a much bigger throttle body than the opening, you will actually lose power? Unless I port match the opening of the IM with the throttle body (which I don't plan on doing).

 

ya, if you don't plan on port matching get a tb the same size of the opening

 

i would think it would be easier to reach that power goal with a 'bigger' intake manifold, like jg or full race or custom. just my opinion.

 

Well I don't think JG Edelbrock makes a IM for a h22. I don't want to have a custom one made because I have a Skunk2 already.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xsi-t &raquo;</TD></TR><TR><TD CLASS="quote">even the T4 version of the 35R only makes 650??? please clear this up for me guys.</TD></TR></TABLE>

Bump cuz I would like to know this too...

 

From what i've seen, the gt35r t4 version, most people are running the .68 turbine housing and it is maxing out at around 650whp at over 30+ psi.

 

even though you increase the turbine side (lower backpressure) you get to a point where you can only lower it so much, until it doesnt make power.

In the case of the t4 GT35R, the compressore wheel is maxxed out around 650whp, and that the compressor wheel can make. Lower hte backpressure all you want, the compressor wheel can not push any more air.

 

Thanks for clearing that up Geoff

 

even the t4 gt35rls is 650 maxx????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xsi-t &raquo;</TD></TR><TR><TD CLASS="quote">even the t4 gt35rls is 650 maxx????</TD></TR></TABLE>

From what geoff is saying, YES, the compressor wheel can only do so much. So basically the compressor wheel is maxing out at 650whp.