You do not need an intercooler till you start to pass about 8PSI with the SC approach.
To add to what Sickfinga said, as air is compressed it generates heat and becomes hotter. As your piston compresses air on the compression stroke as it would normaly do, the air/fuel mixture raised temp as it's compressed but within spec to what it was desighned for, add the new hotter compressed air into the mix = your alot closer to pre-ignition temps AKA "PING".
Too many of theis and your engine goes BOOM!.
"They say ignorance is bliss..... I don't know what the Fu*k that means but I'm pretty happy". Ricky Trailer Park Boys.
Current Mods....X-Brace, Stromung Cat Back Exhaust, 17/225/45 M3 Replicas, HotBits Adjustable Coil Overs, 40% LSD 3:91 Diff, E30 Gearbox, Boosted.
Last edited by jeffrie; 02-13-2007 at 06:43 PM.