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vorse

By vorse,
in Engines & Forced Induction

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

There are some big power RB30s built with the Neo head but I am not sure of the advantage of going to the trouble of adapting RB26 throttle bodies - especially when the really big power RB26s seem to revert to one big throttle body (don't know the rationale for that).

For myself an RB26 head on my RB30 would be great but the vct conversion sounds interesting as well depending on price.

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GTSBoy Grand Master

GTSBoy

Posted
Posted

the really big power RB26s seem to revert to one big throttle body (don't know the rationale for that).

Largely because way back in the day, to use a MAP sensed ECU, they needed to go big single plenum and TB to get a stable load signal. They wanted to go MAP sensed because of all the trouble they had with reversion through AFMs.

Some of that still holds true today, although solutions to the base problems are known. Nevertheless, old habits die hard.

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JustinP Mentor

JustinP

Posted
Posted

There are some big power RB30s built with the Neo head but I am not sure of the advantage of going to the trouble of adapting RB26 throttle bodies - especially when the really big power RB26s seem to revert to one big throttle body (don't know the rationale for that).

For myself an RB26 head on my RB30 would be great but the vct conversion sounds interesting as well depending on price.

I just like the idea of the ITB's because I'm sure they are what gives the RB26 it's unique sound which I love. I will revise my idea of the ultimate RB - Neo head, adapted RB26 ITB's / plenum AND an RB30 bottom end :P

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Hanaldo Grand Master

Hanaldo

Posted
Posted

I just like the idea of the ITB's because I'm sure they are what gives the RB26 it's unique sound which I love. I will revise my idea of the ultimate RB - Neo head, adapted RB26 ITB's / plenum AND an RB30 bottom end :P

I don't think so; my mechanics RB26 has a Hypertune plenum with a single throttle body and it still sounds like a 26.

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