Quote:
Originally Posted by oldman
I don't see how this is possible (stock engine???) on a 4.5 (upper) pulley my D1X makes 7 PSI at 6800 RPM, maybe 8 PSI at 7100 RPM. built engine stage 1 cam. 
With a 4.0 pulley it is about 12 PSI at 6600 RPM same engine. Both with the procharger standard lower pulley.
I mean it is only at 2/3 speed with a 4.5 pulley (I did the cals several times you have to search).
stock damper. I would be worried that you add on crank pulley may not fit aftermarket dampers. (Procharger would know). I assume you have the old style kit that has a separate crank pulley. If not Yeah, I would assume an UD crank pulley would work. |
I'm assuming it's because it is the larger F1 head unit? Not sure but I completely trust my tuner with what he says is going on, he's been tuning for 20 years. All of it really doesn't matter now because I purchased a Procharger intake with bungs for port injection and a secondary port injection system good for 1400 rwhp and I am about to purchase a forged short block and just turn it up.
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