Looking into buying my blower... a few Qs

MustangChris · Sep 29, 2009

I was reading Kenne Bells web site and i was curious waht these terms mean:

"Supercharger Drives"
here's some text to go with it, so you have an idea of what im reading...

DRIVE ('03-'04 COBRA 2.8, 2.6, 2.4) 12MM BLACK
( DRIVES AVAILABLE IN BLACK OR POLISHED. SPECIFY YEAR VEHICLE, SC MODEL NUMBER AND PULLEY)

"Supercharger Bypass Valve"

context text:
BYPASS VALVE ASSEMBLY (specify year, vehicle)
LOW VACUUM BYPASS VALVE ASSEMBLY (specify year, vehicle)

"FUEL REGULATOR PRESSURE DISC (prevents surging, saves fuel pressure sensor)" (no context, just a price of $15.00)

what are these? what do they do? when are they used? will i need to buy them?

Thanks all,
Chris

blown98gt · Sep 29, 2009

by drive, they are talking about the actual unit itself.

the bypass valve is basically a blow off valve but the difference is instead of venting into the air it typically recirculates it back into the pipe. All draw-thru maf setups have to have the air recirculated from the bypass valve and all blow-thru maf setups the bypass can be vented into the open air.

fpr is just a fpr

MustangChris · Sep 29, 2009

FPR Disc? lol

whats teh difference between draw through MAF and blow through MAFs?

thanks for the help

NXcoupe · Sep 30, 2009

ON a Kenne bell it has to be draw through because the blower shoots the air directly into the engine via the intercooler under it in the intake manifold.
A blow through is like procharged or intercooled car that has the mass air in the piping, and the air, well, blows through it as it enters the engine.
With a KenneBell, there is no need to worry yourself with a blow through or draw through, they only use a draw through.
Their bypass is made into the rear of the blower and when it sees vacuum, it allows the pressure from under the blower to route back up into the intake plenum on the rear of the engine. I am a KenneBell dealer and have installed several, so if you have any questions feel free to pm or just post here.
As for the insert, I believe it is a vacuum restrictor or something of that kind, that keeps subtle changes in vacuum signal from affecting the computer's decisions in controlling timing and fuel. That's what causes surges and other problems.
Hope this helps.