s4 and s5 throttle bodies
#1
King of the Loop
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s4 and s5 throttle bodies
What si the dirrerence between the s4 and s5 tb? Also can the s4 tb be put on a s5 uim? I was told before that it could but now i see sum1 in the for sale secton saying he had to modify his to make it fit. So whats the deal?
#5
there is some metal that needs to be removed to fit the s4 TB on the S5 UIM. check http://homepage.mac.com/carldavis/intake/mod.html and scroll down to the bottom of the page.
#7
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Originally Posted by rx7will
You can run a s4 tb with the tps on a s5 manifold. All you have to do is change over one stud on the manifold. I'm not running the thermowax or the double throttle so its pretty simple.
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#9
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Originally Posted by BlaCkPlaGUE
while we're on that topic, what is the benefit of having a narrow and full range tps? more accurate fuel controll or something?
FYI, the FD's TPS has both narrow-range and full-range sensors built into one unit, with two output wires.
#10
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Originally Posted by NZConvertible
The narrow-range TPS is really only used to tell the ECU whether or not the throttle is closed. The full-range TPS is used for transient fuel control (like an accelerator pump), OMP control, A/C cut control, injector kill for unflooding and some other things. Although the full-range TPS could be used to tell the ECU the throttle is closed, the much greater resolution of the narrow-range TPS allows this to be done with more accuracy.
FYI, the FD's TPS has both narrow-range and full-range sensors built into one unit, with two output wires.
FYI, the FD's TPS has both narrow-range and full-range sensors built into one unit, with two output wires.
So why can't this all be done in one unit? I still don't get it..
#11
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Originally Posted by NZConvertible
Although the full-range TPS could be used to tell the ECU the throttle is closed, the much greater resolution of the narrow-range TPS allows this to be done with more accuracy.
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Originally Posted by NZConvertible
You can't use the S4 TB on a S5, as it has no full-range TPS.
#15
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Actually the manifolds and engine don't really matter. All that matters is the ECU. The S5 ECU must have a full-range TPS connected to it. If he's using the S4 ECU it'll be fine.
#19
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Ok well I have a s5 block with s4 manifolds in ym sf car right now. i want to swap in s5 port matched/polished manifolds to get the full benefit of a s5 engine. but im dont knwo what i need to do to get my s4 tb on the new manifold. I am keeping the s4 cause of the tps and the omp.
#21
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Originally Posted by mycarisolderthanme
what? so you have.. an s5 block, s4 manifolds, s4 ecu, s4 omp, and s4 soon to be s5 manifolds?
#22
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not sure if its the same between N/A and TII, but on a TII the S4 TB will physically bolt onto the S5 UIM. just one of the nuts only threads on like 1 thread. I never had any problems with a vac leak or anything though when I had to do that.
oh, and since you have S4 wiring and computer(right?), yes you will need to use the S4 TPS/TB.
oh, and since you have S4 wiring and computer(right?), yes you will need to use the S4 TPS/TB.
#23
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That sounds right, given that 1 TB screw on the s5 manifold is shorter than the rest and they all look equal on the s4. Well i guess ill find out when i do ti. Im still tryna fidn a writeup on boring out the TB. i see the butterfly mod on fc3spro but i cant fidn a step by step with pics for boring out the TB or porting the manifolds. The manifolds seems easy enough but I might just polish the tb and let it be with that as to not risk anything.
#25
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Originally Posted by mycarisolderthanme
did you not follow the link i posted on the first page? it shows EXACTLY what you have to do.
Thanks