Big bore throttle bodies

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Aug 26, 2003 | 03:22 PM

gsr sol

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Big bore throttle bodies

Are there any advantages or disadvantages to running a overbored throttle body on a turbo setup? I am talking about 18psi of boost or so. Can you go too big? There is one site that makes them 70mm. Anyone had any experience with these?

Thanks

Aug 26, 2003 | 05:18 PM

Charlie Moua

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From: MN

Re: Big bore throttle bodies (gsr sol)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsr sol »</TD></TR><TR><TD CLASS="quote">Are there any advantages or disadvantages to running a overbored throttle body on a turbo setup? I am talking about 18psi of boost or so. Can you go too big? There is one site that makes them 70mm. Anyone had any experience with these?

Thanks</TD></TR></TABLE>

Yeah there is a benifit to it if your COMPLETE turbo setup allows for more flow.... meaning turbo, IM and compression & RPM limits.

Personally IMHO.....for a normal turbo setup 8-15psi stock ITR (62mm to 65mm work great) 70mm would be overkill for most applications. Check out Ericks 70mm TB, or IB 70mm tb. Kingmotorsports can make you a overbore of a ITR (62mm) into a 67-68mm. hTH