Hi Joe. I have run any number of forced induction engines in my half
century on this rock and without exception
the car/bus/semi/m-cycle et al all used a factory cam. Exceptions to the
rule, sure ,how about drag vehicles or off shore power boats etc.The
idea is to keep your chug around drivability but to have the benefits of
a larger engine at positive boost .Always run a stock cam, or copy of
same,with a performance cam the blow through will hurt your mileage and
so waste fuel.Why do it?Diesel engines do not use long duration cams to
make power, they are boost pressurized up in the 20's lbs psi,(admittedy
intercooled.)OTR semi's develop 4 to 600 hp at 1800 rpm.My motorcycle
750cc was 180 hp + at 11500rpm.My old VW bus churns out 150 or so at
5000rpm.
Try your local library on turbocharging or forced induction. Regards
DK
Joseph J Burlein wrote:
>
> Hadn't heard that about the cam. Could explain why I don't get a punch
> until late in second gear, then third and fouth. Since I am not worried
> about off the line performance, I won't worry about it until an engine
> rebuild way in the future (I hope!). Any idea if it hurts the
> acceleration in higher gears/RPMs?
>
> Joe Burlein
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