EFR 9180 Street Port Dyno Results
02-21-18, 05:27 PM
#27
Banned. I got OWNED!!!
02-23-18, 03:55 PM
#32
Full Member
Thread Starter
02-28-18, 11:58 PM
#36
It is my understanding that plenum volume helps with driveability/low rpm power and hurts high rpm power because it introduces more pumping losses.
Mazda worked hard to reduce the plenum volume on the FD for this reason. Likewise Formula SAE cars have since come up with the "inline plenum" like Mazda did on the FD where the intake looks like typical shorty 4-1 header and the plenum is inline in the collector area to cut down on pumping losses.
That said, single blade throttle bodies and their associated single entry plenums have less surface area exposed to flow compared to stock triple throttle plates and dual entry intake and therefore less aerodynamic drag which helps with big intake flow #s.
The shorter intake runners shift peak power up in the rpm range.
A short runner 4150 style manifold and the 4150 to single blade throttle body like the Projay set-up should have all the advantages for power (on paper anyways). It should also have some serious disadvantages to driveability like any single big throttle body intake...
More than one way to skin a cat and more than one way to tune that skinned cat to make it work well.
Mazda worked hard to reduce the plenum volume on the FD for this reason. Likewise Formula SAE cars have since come up with the "inline plenum" like Mazda did on the FD where the intake looks like typical shorty 4-1 header and the plenum is inline in the collector area to cut down on pumping losses.
That said, single blade throttle bodies and their associated single entry plenums have less surface area exposed to flow compared to stock triple throttle plates and dual entry intake and therefore less aerodynamic drag which helps with big intake flow #s.
The shorter intake runners shift peak power up in the rpm range.
A short runner 4150 style manifold and the 4150 to single blade throttle body like the Projay set-up should have all the advantages for power (on paper anyways). It should also have some serious disadvantages to driveability like any single big throttle body intake...
More than one way to skin a cat and more than one way to tune that skinned cat to make it work well.
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RGHTBrainDesign (06-06-18)
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infinit1 (03-02-18)
06-06-18, 10:57 AM
#41
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Thread Starter
We only got to 60% duty cycle on both the id2000 and the 550lb injectors so we have a lot left as far injector goes but the turbo was maxed out as far as shaft speed goes.
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