i did a little searching and didn't find the exact info i was looking for. I was wondering about putting the mrev2 + 5/16" spacer + crawford polished plenum. on my 04 5AT G35c. Has anyone heard anything about running these mods together or if you CAN run them. Sorry if i am just off the ball on this but this is what happens when i get an idea in my headand just run with it. Any help would be much appreciated. Thanks guys.


Eric

 

Can you run them??? Yes. But I don't think they will all add up to net the gains you think they will. Once you remove the air intake path restrictions, adding more items that accomplish the same will net you decreasing rate of returns. ie.. installing the Mrev + spacer might gain you 10-15 hp. But adding a Crawford plenum on top won't gain you another 8-12 hp.

 

I thought you were not supposed to run a spacer and a plenum together on a Non-Rev Up. I believe it is OK for the Rev-Up but not the Non, for some reason.

 

ahh, that makes perfect sense. thanks jeff.


you can run them as long as you do some changes to your fuel/ecu. which i already have plans to do.

 

yeah you can run all of them, but if you are going to drop the $$$ for the polished crawford plenum why pay for the spacer. Crawford plenum is basically the same thing as the spacer. Then adding the MREV below with the crawford will probably need some fuel/ecu tuning to keep you from running lean (although the engine runs so rich from the factory I doubt you'd have that much of a problem), but if you're already going to drop some more $$$ on the ECU I'd say go for it all. Run some dyno before and after numbers too so we all can see the gains