Correct mapping for Camshafts

[ECMnut at aol.com]

That's a bummer..   MAP & vacuumm killing cams
can be a PITA.  I went through this with my Syclone.
and found a table referred to as  
 "F29E Base Pulse VE vs RPM And MAP (Closed Throttle)"
Thought this was the silver bullet to fix a low idle vac problem...
It help some, but hindsight showed that I should've read more first.
If I had only gone a few byte farther, I would have found the
 "F30, Base Pulse VE vs RPM"  I just reduced the first 6 values 
of the 15 byte table from all 31's to 24,25, 26, 27, 28, 29  as a rough 
guess to compensate for what the cam did to low rpm efficiency..
I got lucky..  It worked well...   Use block learn as your seing eye 
dog for rich vs lean..  If it is much higher than 128, you need to lean
things out.  Much lower, and you need to fatten..  You'll need to lean.
My numbers were in the basement (90's)..
Mike V

>  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.
>