Correct mapping for Camshafts

[EFISYSTEMS at aol.com]

Hi,
      I realize you say this is a 90 chev pu..but why does it have the 6299 
in it????did it used to have a supercharger on it???? the 6299 wasn't used in 
a PU until 92......but supercharger companies used to convert the early 7747 
to a 6299 because it was a direct plug in and they didn't reverse the code of 
the 7747 until later.....otherwise check your year......a 7747 will plug 
right in.....but that big of a camshaft is gonna take quite a bit of work 
especially with that slow processor....let me know if I can help.......
-Carl Summers

In a message dated 10/26/99 6:02:59 PM Pacific Daylight Time, 
nwester at eidnet.org writes:

<< Subj:     Correct mapping for Camshafts
 Date:  10/26/99 6:02:59 PM Pacific Daylight Time
 From:  nwester at eidnet.org (Programmer)
 Sender:    owner-gmecm at esl.eng.ohio-state.edu
 Reply-to:  gmecm at efi332.eng.ohio-state.edu
 To:    gmecm at efi332.eng.ohio-state.edu
 
 Hi guys,
 
 Got a guy I'm trying to help out at a neighboring shop. He's got a customer 
with an
 AWLB 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.
  >>