legacycentral bbs

Kind of a rhetorical question, since some day I will be able to answer it.

But anyway, I couldnt stand the 3 psi and need more. So I installed the larger crank pulley but DID NOT install the AWIC. Instead I left the 2.5" piping that goes straight from the SC to the throttle body. But instead of having a blow off valve, I COMPLETELY removed it, leaving a 1/2" diameter hole in the duct work. This literally squeeks like a mouse when off boost, and roars when on boost. But I am getting a steady 5psi now, with no detonation which A) maked my motor happy and B) makes me happy.

But back to my rhetorical question, how much boost do you think I am losing with this massive hole?

Haha, and the hole makes a pretty loud noise the moment I shut the throttle as well. Back to scaring pedestrians!

That's gotta be playing hell with your air flow sensor......

In the morning it did, but once it warmed up it runs fine.

But I traded holes, for a smaller one and boost went from 5 psi to 8 psi. No audible knock and no puffs of smoke coming out the back.

And just today I sealed it up 100% and did a single 2nd, 3rd, 4rth gear run.

10 psi barely, but I am getting some belt slippage.

And I did have a knock or two. So back to the single 1/4" diameter hole and 8 psi.

God only knows why this motor has no problems with the high boost, high compression, no intercooled setup. But I aint looking a gift horse in the mouth!