Ok right now on my obd1 Ls (integra) im running a wet 50 shot of nitrous (but plan to turbo towards feb/march) My other mods are a greddy evo2 exhaust, AEM CAI, 4-2-1 header, and a skunk2 intake manifold.

My goal is to have a faster drag car with a well balanced low and top end...
Since im going turbo i wont have a need for the header/intake but my question is How do i determain what size throttle body to get... i know skunk 2 offers 60,66,68, and 70 mm TB's i just want an idea of how to choose a proper size to accomplish my goals...
Suggestions/Tips are wanted...
as far as searching i came across a couple threads but none really answered my question (well not really specifically)
Thanks in advance

 

how much power are you looking to make on turbo? The stock tb can handle plenty.

 

i know it can "handle" it but the ls TB is the most restrictive and i think i would get more power by "freeing up" a little on the TB.... with turbo im looking tto make around 300 whp...

 

Choosing a TB is cake on a turbo setup - all you have to do is match the size of your charge pipes.

For example, almost everyone has 2.5" charge pipes, so they go with 64mm TB's (2.5" = 63.5mm).

If you end up with 2" charge pipes, you can keep your stock TB (2" = 51.8mm)


All you need to do is make sure that your TB is the same size as the pipes. If it's bigger, it won't do anything beneficial. If it's smaller, it will obviously be a slight restriction.

 

Thanks a lot... is it the same with an intake? or should i just pick one based on my future plans for turbo piping size?
haha i think i just answered my own question

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blaxican05 &raquo;</TD></TR><TR><TD CLASS="quote">should i just pick one based on my future plans for turbo piping size?</TD></TR></TABLE>


Definitely. But while you're still N/A, you might have a hard time fitting the intake coupler over the larger TB. You can always buy reducer couplers though.

 

cool thanks... i pretty much feel like i lost some low end torque (when not squeezing) after the skunk2 manifold not sure tho... will a TB help that out or will i just be SOL till i have some big time FI...

 

The TB will mainly just quicken up throttle response. The intake manifold is what will shift the power band around.