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Question On Front Facing Plenum

dr1ft3r

By dr1ft3r,
in Engines & Forced Induction

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ahh 33 s2 Mentor

ahh 33 s2

Posted
Posted
I'm currently building an RB25/30 for my 32, would a standard GTR plenum fit on an RB20 25 or 30? if so wouldn't that be the best bet with the multiple throttle bodies? or some thing simpler like a greddy?

i would also like to no if a gtr plenum could go straight onto a 25?? also the ebay "greddy" plenums they say they are a copy, good or bad idea

rinmak Proficient

rinmak

Posted
Posted

Seriously dont know why people bother with these cut and shut stock plenums. If you want a forward facing plenum then fair enough, so do I, but if your going to do it then do it properly and get something like a Greddy or Plazmaman plenum. These companies have spent lots of time and money trying to perfect the flow characteristic of their product and saved you all the hard work, so I think the extra money is well worth it.

Plus they look a shitload better than modified stock, plazmaman especially.

zertek Proficient

zertek

Posted
Posted

l_78f349979a4eefeed31e2ef1cc65eecc.jpg

Here is my plenum... I'm not sure what it is as the previous owner just said it was 'custom'. It's using the standard throttle body.... my head gasket just blew the other night... not sure if this is related to the damages as im still trying to grasp a better understanding on mechanics.

GeeTR Grand Master

GeeTR

Posted
Posted
l_78f349979a4eefeed31e2ef1cc65eecc.jpg

Here is my plenum... I'm not sure what it is as the previous owner just said it was 'custom'. It's using the standard throttle body.... my head gasket just blew the other night... not sure if this is related to the damages as im still trying to grasp a better understanding on mechanics.

Feck me, nice car to be "learning teh mechanics" theres some heat in that bay for sure

  • 2 months later...
Behind Horizon Collaborator

Behind Horizon

Posted
Posted (edited)
yes gtr plenum can fit onto an rb25 head. Blitz makes a bolt-on adopter kit its worth about $700 and then you have to buy the gtr plenum and sort out the injectors . and blitz made a comment that it wont work with a std ecu

Do you or somebody else do know where i can get this Blitz adapter kit ? I would be very thankful if somebody could help me.

Edited by Behind Horizon
TurboX Mentor

TurboX

Posted
Posted

I would not like to use the std plenum just sealed at the center and a hole put for the inlet at the front because of obvious uneven distribution.

I built my plenum with care to try to avoid this problem but probably would have been better to buy Plasmaman/Subzero etc.

wolverine Grand Master

wolverine

Posted
Posted

i'm just checking that you really think it has lowered intake temps by 30 degrees?

exactly how and where did you measure this?

ps. i have measured mine at the plenum so i have a pretty good idea why you won't lower intake temps by 30 degrees when you remove a little pipework.

craked Proficient

craked

Posted
Posted
i'm just checking that you really think it has lowered intake temps by 30 degrees?

exactly how and where did you measure this?

ps. i have measured mine at the plenum so i have a pretty good idea why you won't lower intake temps by 30 degrees when you remove a little pipework.

well i guest you dont tune cars then sore the temp drop on my haltech,mates ems and motec all 10sec cars guest that proves that it works

Alf Proficient

Alf

Posted
Posted
hey bud i have used a cut standard one for the past 2 years without any problems and so have a some of my friends. your intake temps will drop by about 30 degress which = hp

When was the last time you tore down the motor to check for uneven wear to back up your claims?

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