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Oem Rb26 Plenum With Single Tb

bigmikespec

By bigmikespec,
in Engines & Forced Induction

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bigmikespec Veteran

bigmikespec

Posted
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Hello everyone,

Just wondering if anyone has converted the OEM RB26 plenum from individual throttle bodies to a single throttle body?

I am not interested in the for and against argument as I am well aware of it, I don't want it to turn into a 'why the hell are you doing that for' from a bunch of 5min experts.

Just wanted to know if anyone has done it and what were the recorded results if any from doing it?

Thanks,

Mike

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bigmikespec Veteran

bigmikespec

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Well the short reason is that the head porter would like to move to a single throttle body and ultimately a plenum with larger volume (as do I). Considering the ridiculous price of most aftermarket plenums as a means to get by for the short term I was going to convert the OEM plenum to a single throttle body.

XRATED Veteran

XRATED

Posted
Posted

Alot of the early Japanese drag Gtr's had modified stock plenums with vh45 tb's. I was always under the impression it was for ease of tuning.

I haven't seen much in the way of intake trickery done with rb's.... jenvey style updraft centre entry manifolds, experimentation with different intake angles (apex v-max and the hks drag gtr's), exploring split 2x3 intake manifolds, variable length runners etc

Maybe try and find a cheap greedy knockoff, build a spacer plate that's as wide as you can get to fit for a bit of extra runner length, build a bias set trumpet arrangement and whack a vh45 Tb on the front... see what happens?

Then keep us updated

Cheers

J

bigmikespec Veteran

bigmikespec

Posted
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Posted

Unfortunately there is less interest in actual development of performance parts for the RB26 as the majority of the crowd that have them want flashy ricey bits for a street car and not motorsport orientated parts. Probably why there hasn't been much work done in this area, especially considering plenum design is often left to OEM's or big motorsport teams.

I know Ariel from CPC is doing something really good, I spoke with him and was super impressed but his product is a bit out of reach for me dollar wise as he is develping a top shelf product.

I would love to do a Lehmann style manifold, I started messing with a design but got too busy with house rennovations.

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