Beta2 Alpine Supercharger
Senior Member
Joined: May 2001
Posts: 585
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Vehicle: Mitsubishi Lancer Ralliart GSR
QUOTE (fordfasterr)
from what alpine tells me, the psi is a bit lower than on their test car since they hit 8 psi with it... alpine says the reason for the lower boost is the fact that i have such low backpressure in the exhaust with no cats and a high flow muffler...
their test car had both cats and the stock can in the back... that help to keep the boost in the cylinders more efficiently..
their test car had both cats and the stock can in the back... that help to keep the boost in the cylinders more efficiently..
I'm running 8 psi, with aftermarket 4-2-1 headers and an exhaust with no cat.
Maybe adding a cat would help to create a little backpressure, although how can backpressure increase boost, surely 'boost' is the compressed air coming from the supercharger?
Sorry to resurrect this post
Senior Member
Joined: Oct 2003
Posts: 3,832
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From: Fort Erie, Ontario
Vehicle: 2004 Acura TL
Backpressure on any Forced Induction application is no good IMO. A cat wouldn't create that much bp though.
Yes, boost comes from the compressor in the supercharger. As you know it compresses the air, heating it in the process, and then throws it into the engine.
What about mounting the IM upside down?? That might give enough space to throw in one of Mad-Machines little water-cooled IC's he was looking at. I'm just throwin' stuff out there.
**EDIT**
I should prolly stop throwin' stuff. I just realized that you'd have to pu the maf on the other side plus the tb and all the throtle cables. It'd be a mess.
Nevermind!! Disregard my idiocy. If that's even a word?
Yes, boost comes from the compressor in the supercharger. As you know it compresses the air, heating it in the process, and then throws it into the engine.
What about mounting the IM upside down?? That might give enough space to throw in one of Mad-Machines little water-cooled IC's he was looking at. I'm just throwin' stuff out there.
**EDIT**
I should prolly stop throwin' stuff. I just realized that you'd have to pu the maf on the other side plus the tb and all the throtle cables. It'd be a mess.
Nevermind!! Disregard my idiocy. If that's even a word?
Senior Member
Joined: Jan 2002
Posts: 573
Likes: 0
The car looks good, I thought it would make a little more power to the wheels, you should look into getting one of these boost cooler kits http://snowperformance.net/products.asp?id=1 They use a alchohol water mixture to cool down the intake charge, I'm running one with my turbo and it really makes up for the small alpine intercooler, you notice the most differance on those hot days.
