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Intake Manifold (forward Facing Plenum)

Yts

By Yts,
in Engines & Forced Induction

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Yts Rising Star

Yts

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so i am looking at a forward facing plenum for my r32, have an stroked rb20 and next on the list of upgrades now that i have finished the engine is a plenum, basically the power side of things has already been sorted out and mopre than anything doing it to get rid of the cross over pipes and tidy up the engine bay, basically what i want to know is bigger throttle body size i.e 90mm better then say a 75mm, there are options ranging from the 75mm through to 90mm for me to choose from, anyone with experience using this throttle body size or info to help me would be much appreciated

regards

jeremy

R31Nismoid Grand Master

R31Nismoid

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Plus the other issue is the larger you go, the less responsive/controllable the throttle is with low RPM and so on given you use 10% with a smaller one it's opening a lot more than 10% with a large butterfly :/

A few people here have actually changed back from larger TB's to factory ones and noticed this down in their posts.

I think Al was one such user.

Yts Rising Star

Yts

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  R31Nismoid said:
Plus the other issue is the larger you go, the less responsive/controllable the throttle is with low RPM and so on given you use 10% with a smaller one it's opening a lot more than 10% with a large butterfly :(

A few people here have actually changed back from larger TB's to factory ones and noticed this down in their posts.

I think Al was one such user.

yeh thanks for the extra info def good food for thought, so maybe just buy the plenum and use the factory tb?

juggernaut1 Proficient

juggernaut1

Posted
Posted (edited)

I actually found a larger t/b made the car "feel" more responsive on my sr20 with the 77mm Hypertune t/b over stock.

But yes because it is more responsive it can be trickier in car parks etc where you use low throttle apps. All in all I liked it.

Edited by juggernaut1

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