I have a inlinefour.com 70mm throttle body that I just recieved and was told by my mechanic that it might be to big for my setup (b18c1, skunk2 mani, drag3 kit w/ upgraded turbo and manifold) t3/t04e 60. trim 63 ar (precision), InlinePRO manifold. im running stock gsr tb right now.

My question is would 70mm do more harm then good for my setup ? I was told that a ITR throttle body would better suit my needs.

Any help would be greatly appreciated

 

someone ? anyone ? bump plz

 

Try it and see..Usually an oversized tb will do you no harm on a turbo set up.

 

I am using one.. my car seems to run pretty good never ran without it though so don't ask

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">Try it and see..Usually an oversized tb will do you no harm on a turbo set up. </TD></TR></TABLE>

Yep, I've found the same thing. Although too big on a N/A motor can really drop your low end power.

 

Doesnt matter if its FI. It will only hurt if your all motor.

 

thanks alot guys for the info greatly appreciated

 

how about this.
Will it actually Net you some power gains?????????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid &raquo;</TD></TR><TR><TD CLASS="quote">how about this.
Will it actually Net you some power gains?????????</TD></TR></TABLE>

i'd like to know too...

... also, anyone care to explain why it wouldnt hurt a turbo setup but would hurt an all-motor setup?... thanks...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid &raquo;</TD></TR><TR><TD CLASS="quote">how about this.
Will it actually Net you some power gains?????????</TD></TR></TABLE>

i know some one had compared a stock TB to larger TB on a JRSC honda and saw no gains....but i'm not sure who it was exactly or if it would be anydifferent on a turbo car

 

you will see no gain stock tb is good to 500whp++

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleeper007 &raquo;</TD></TR><TR><TD CLASS="quote">you will see no gain stock tb is good to 500whp++</TD></TR></TABLE>

what about throttle response ? will i be able to notice any gains or will it just cause lag ?

 

i wouldnt spend my money on that. i've seen plenty of power on the stock tb.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8T_EG &raquo;</TD></TR><TR><TD CLASS="quote">

... also, anyone care to explain why it wouldnt hurt a turbo setup but would hurt an all-motor setup?... thanks...</TD></TR></TABLE>

First off flow velocity keeps atomized fuel from forming droplets and gets it into combustion much better. Lower velocity will lead the fuel in the air to split up, especially around a turn. The air will flow down a curve, but the fuel will fly straight into the wall ahead of it at a turn. So as the cross sectional area increases, the velocity is slowed ok? Unless you have matched your throttle body to the intake manifold, done headwork to compensate for the extra volume or what not, the larger throttle body will hurt you down low. Efficency is found by determining what the MAP sensor is reading in the plenum at WOT while using a datalogger. Map needs to be equal to atmospheric pressure. If not, or it drops at WOT, then your throttle body is too small. Hope this gives you somewhat of an idea.

EDIT: SPELLING CORRECTED





Modified by intekragsr at 11:01 PM 5/25/2003

 

i have never realised that english is so difficult ......

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SEX DR &raquo;</TD></TR><TR><TD CLASS="quote">i have never realised that english is so difficult ...... </TD></TR></TABLE>

Hehe, sorry I typed it in bed laying down on my laptop.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid &raquo;</TD></TR><TR><TD CLASS="quote">how about this.
Will it actually Net you some power gains?????????</TD></TR></TABLE>
If your throttle body is the bottle neck in your system, you can see performance gains. 2.5" piping can get away with 64-5mm tb. Any piping larger than 2.5" could use the 68-70mm tb. Remember when doing your calculations for throttle body volume, you must remove the volume displaced by the butterfly and shaft that holds it.