Correct mapping for Camshafts

[steve]

i had the same problem in my 89chevy truck, didn't make power til about
3000 rpm
called comp cams cam help  1-800-999-0853. they informed that my crank
had
4 degrees retard ground in from the factory. i bought one of their
timing sets that
has double roller chain and triple indexed crank sprocket, degreed the
cam and
the power band came down to where it should be
steve

Programmer wrote:

>  Hi guys, Got a guy I'm trying to help out at a neighboring shop. He's
> got a customer with anAWLB Prom (90 GM 5.7L C15 Truck) and the wrong
> camshaft. Right now, the guy has put a Comp Cams 280H (.480 Int/exh
> and 280 degrees duration) in his bone stock truck engine, has only 14"
> vacuum at idle (needless to say his truck is really overfueling). Runs
> like crap till around 3000 RPM because of the overfueling. Only other
> modification on the truck is headers and a dual exhaust. What's the
> plan of attack to correct this, based on differing parameters in the
> PROM ? I realise this is a 16146299 ECM, and I'm working on an *.ecu
> for this one right now...but ideas from a 7747 would really
> help. Thanks--I'd appreciate straight answers and not things like "he
> chose the wrong camshaft" <g>. I'll at least admit I'm not sure how to
> reduce fuel vs. MAP. Lyndon.