Bigger throttle body on a FRST.... any gains ???

CVH and Zetec tuning, suspension and braking mods.
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Bigger throttle body on a FRST.... any gains ???

Postby Jur on Tue Dec 16, 2003 2:17 pm

Hi,

On a dutch Ford Forum the subject: "Bigger throttle bodies" is a hot item at the moment.

- Will a bigger throttle body have any gains for a FRST (top rev?? )
- What Throttle bodies to use.. and what NOT to use ??
- Any other changes to make ??
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Postby Project on Tue Dec 16, 2003 5:58 pm

Isn't the inlet manifold is more of a restriction?

The 130ps Zetec throttle body is around the same size but the inlet port diameters are a lot larger on the Zetec.

Anyway, for the turbo CVH engines, I don't think the throttle body is going to be a major problem :)
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Postby Jur on Thu Dec 18, 2003 2:14 pm

Thanx for the reply, but I'm not asking if it is going to be a problem..

I'm asking if i will gain something (faster revving, faster throttle response etc..)
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Postby Fezzy Turbo on Fri Dec 19, 2003 9:25 pm

I doubt just changing the throttle body would make much difference. I wouldnt say the throttle response was slow from the std item anyway. Just make sure the connecting cable and mechanism is clean and given a squirt of oil every so often.
Greg : Owner of a FRST for 14yrs

2009 FRS2 : 377bhp ATW / 395lb/ft :)
1990 FRST : Sold.
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Postby Jur on Mon Dec 22, 2003 8:02 am

Fezzy Turbo :I doubt just changing the throttle body would make much difference. I wouldnt say the throttle response was slow from the std item anyway. Just make sure the connecting cable and mechanism is clean and given a squirt of oil every so often.


Well i have changed a wee bit of the engine already.. so .. it might help..
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Postby saqmaster on Wed Dec 24, 2003 9:40 pm

Well, considering a 50mm throttle body on a cossie is good for over 400hp, i dont think you'll see an issue.. and responsiveness is irrelevant really as its forced induction..
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Postby Jur on Mon Dec 29, 2003 8:11 am

saqmaster :Well, considering a 50mm throttle body on a cossie is good for over 400hp, i dont think you'll see an issue.. and responsiveness is irrelevant really as its forced induction..


forced @ higher RPM .. near atmospherical at lower RPM.. so response is an item
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Postby Ian C70T5 on Mon Dec 29, 2003 4:40 pm

It might be better mate, but it might be like Al says, better replacing the actual inlet plennum (spelling) as the FRST one is reasonable restrictive i think. Well it is for mine..
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Postby Ian C70T5 on Mon Dec 29, 2003 4:41 pm

In saying that Kenny has an Escort RS 2000 with a Turbo Conversion, his is running about 340bhp, and the ERS2K Throttle Body is the same as the FRST Item. so actually i think the standard FRST one will be fine
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Postby Jur on Tue Dec 30, 2003 9:42 am

Thanx for the replies..

i think i'll stick with the FRST one..

it's working fine at the mo.. and no need to replace it for an item which might give some trouble
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