CL-S progression 01

iTrader: (2)

how large is our OEM typeS throttle body?

and how do I go about getting a bigger one and what size should I go?

richardparker

iTrader: (7)

OEM I think is around 68-70mm.
You would'nt need no more than 76mm unless you had a huge intake (High volume)and high lift cams and alot of fuel.

CL-S progression 01

iTrader: (2)

OK and how do I go about getting a 76mm tb??? who makes them for our cars?

civicdrivr

iTrader: (9)

Right about size. Wrong about what this engine needs. These motors love to breathe. When you open up the intake and exhaust they'll keep making power. My old motor wouldnt make power past 6k rpm. Now it stops making power even lower.

CL-S progression 01

iTrader: (2)

^^ you lost me there civicdrivr

did you mean "now it stops making power even higher" ?

because you said "now it stops making power even lower"

which doesn't really correlate to your theory of how these motors love to breath. So i assume you meant it makes power even higher, now that u got the exhaust and the intake modded.

So my question is.

What size throttle body should I get? and who makes them

civicdrivr

iTrader: (9)

My motor wont make power above 5k rpms now. I opened everything up but the exhaust and throttle body so far.

My throttle body is small. Its 71mm in and 70mm out. Its not supplying nearly enough air.

No one makes them. Anything larger then a stock ported throttle body is a custom application.

CL-S progression 01

iTrader: (2)

I thought P2R does custom throttle bodies? or do they not do that anymore

civicdrivr

iTrader: (9)

He ports the stock throttle body.

brian6speed

iTrader: (5)

p2r can bore out a stock tb from 70mm to 71mm i believe. For you cl-progression i would avoid the custom one. It requires more work than just swapping a larger tb in. A larger tb alone wont really help since its restricted airflow in other places. If any of my info is wrong pls correct me.

civicdrivr

iTrader: (9)

For his motor you are correct. Hes got stock heads and a stock manifold (by that I mean its not ported).

If using the 3.7 intake then there is a benefit to running a larger throttle body. Or if you port the entire system (such as my motor) then the stock or ported tb isnt providing enough air.

CL-S progression 01

iTrader: (2)

tru I guess I should just leave it alone then.

finish the exhaust

Nersh7

nothing is ever finished
either you will want a different sound or are bored

or

do a real dual exhaust

CL-S progression 01

iTrader: (2)

lol I am just gonna do the XLR8 cat and call it a day for now

gnuts

iTrader: (1)

Wouldn't it be easier for you to keep the TL manifold, make a custom adapter to replace the P2R one, and weld on a bigger throttle body to that?