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122 Upgrades 120-130 1967

posted by  Phil S. on  Fri Apr 25 09:16 CST 2003
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last visit: Fri Oct 24 13:18 CST 2014
[RELATED]

Just some info, no intent to be argumentative...

1) The charger makes full boost right from idle, unlike a turbo.

2) The intake still has negative pressure in 95% of driving. The boost only applies when lots of throttle is used.

3) A mild cam, with little overlap, is used so the charger doesn't blow the intake charge right out the exhaust port.

So, unless the motor is intended to be driven at or near full throttle only, we still don't want to drop the CR very much. For the only (so far) motor specially built to take the blower, CR is 8.4:1.

I believe John hasn't reduced the CR on his 1800ES testbed car's motor, and he's now getting in excess of 250 bhp out of it with 11-12 lbs boost.






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New 122 Upgrades [120-130]
posted by  someone claiming to be mgreader  on Thu Apr 24 12:52 CST 2003 >


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