Question On Front Facing Plenum

[ahh 33 s2]

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

[Kaido_RR]

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

[rinmak]

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]

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]

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

[Behind Horizon]

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 August 3, 2007 by Behind Horizon

[Alf]

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.

They are discontinued, would have to be custom made.

[TurboX]

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.

[craked]

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

[wolverine]

30 degrees???

good effort that....breaking the laws of physics.

[craked]

really have YOU it tried cause i have and it works

Edited August 5, 2007 by craked

[wolverine]

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.

[Adriano]

Agreed, 30 deg, no way, think at full throttle how much air flows through the piping, you would have to heat all that air up by 30 deg, i would say 5-10 max

[craked]

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

[wolverine]

so posting up some temperatures measured at the plenum should be simple.

[Adriano]

And i dyno tuned cars full time for 18 months

[Alf]

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?

[Adriano]

Or run multiple EGT or lambda sensors

[robots]

Can some one post more pictures of their chopped front plenums ? Thanks!