336whp!?!?!!? Well sortof.... Crazy Plenum Test
08-05-2009, 05:22 PM
#42
TK
EDIT: I'm curious to know though, if you guys have tried measuring the manifold vacuum while the car is in motion. Seeing as your car no longer requires a MAF sensor, it can be as simple as plumbing a piece of pipe to about where some people have their Z nostril. Something like tuning the AFR on the dyno, then logging it while in motion and see if it starts to go lean, and at what vehicle velocity. Just a thought.
Last edited by T_K; 08-05-2009 at 05:36 PM.
08-09-2009, 07:44 PM
#46
TK,
We haven't measured vac, however without using any MAP sensor trimming, the AFRs are the same on track as they are on the dyno, infact if anything they go rich rather than lean, so there is no big ram air effect in action. There are plans to build a new intake out of carbon with a new airbox however!
Sasha
We haven't measured vac, however without using any MAP sensor trimming, the AFRs are the same on track as they are on the dyno, infact if anything they go rich rather than lean, so there is no big ram air effect in action. There are plans to build a new intake out of carbon with a new airbox however!
Sasha
The upper collector was lifted during the run, and in doing so it functions as if the upper collector weren't there at all. I believe the long bolts are in place, so they were easily able to align it with the lower when necessary. So yes, essentially just a wide open intake manifold.
TK
EDIT: I'm curious to know though, if you guys have tried measuring the manifold vacuum while the car is in motion. Seeing as your car no longer requires a MAF sensor, it can be as simple as plumbing a piece of pipe to about where some people have their Z nostril. Something like tuning the AFR on the dyno, then logging it while in motion and see if it starts to go lean, and at what vehicle velocity. Just a thought.
TK
EDIT: I'm curious to know though, if you guys have tried measuring the manifold vacuum while the car is in motion. Seeing as your car no longer requires a MAF sensor, it can be as simple as plumbing a piece of pipe to about where some people have their Z nostril. Something like tuning the AFR on the dyno, then logging it while in motion and see if it starts to go lean, and at what vehicle velocity. Just a thought.
04-23-2010, 12:54 PM
#47
HR?
The ports are not the same shape on a DE vs HR
Can it be done? sure - would require a CNC'd adapter (a fairly beefy one too) to allow the HR manifold to the DE head. It's been done before, at least on one of the RJN race cars from the UK. No idea if it proved worthwhile, or any results. You then run into the issue of controlling the dual throttle bodies with the factory ecu. Again, doable yes, but not sure if its worth the time/money/effort. You would also need to double the injector size, which again just adds more $ to the equation. I'd suspect you have hood clearance issues as well
Can it be done? sure - would require a CNC'd adapter (a fairly beefy one too) to allow the HR manifold to the DE head. It's been done before, at least on one of the RJN race cars from the UK. No idea if it proved worthwhile, or any results. You then run into the issue of controlling the dual throttle bodies with the factory ecu. Again, doable yes, but not sure if its worth the time/money/effort. You would also need to double the injector size, which again just adds more $ to the equation. I'd suspect you have hood clearance issues as well
Adam what about using the HR plenum/manifold with only one throttle body?
Sealing off the other side and using it only for its design?
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