Injector DC again/N2O

Dave Zug dzug at delanet.com
Sun Oct 15 06:27:24 GMT 2000


Don't think I've seen N2O posts here before ... ?

A while ago (and a while before that, and a while before that, and...) there
was a discussion on injector duty cycling that I had responded to with my
experiences.  I have more to add now, I just pulled a mid 12 second run
using a (TPI) MAF '165 with a stock lower intake and stock 5.7 injectors.
the PW's never went above 88% (5300 RPM shift point, Tim) and the GM o2
sensor reported 0.89 O2 readings the whole way, and no detonation sept for
the launch. I used a *DRY* 45 hp shot (32 jet) of Nitrous and tuned the
injectors back in to compensate, with assistance from 2 additional PSI on
the FP regulator.  I made 8 passes and used less than 2 pounds of N2O ($8
worth at a premium shop).

Using info I got from N.O.S. and a really quick calculation, a 32 jet gives
me 83 CFM at (900 PSI) of N20. This of coarse REPLACES 83 CFM of standard
air and does not purely ADD to the intake's capabilities.  I'm playing with
the numbers and enjoying the new arena for now... has anyone out there done
anything with the GM_ECM and *DRY* N2O?  I searched for web pages and
nothing really technical exists.  Any other "cheaters" out there with real
DATA or experience using GM_ECM?

Man talk about fun... this sucker REALLY launches hard now - feels like a
tire is ready to lift!  finally over 400 hp ;-).. remember when YOU hit that
plateau?

RT 0.549
60'  1.744
330   5.193
1/8   8.082
MPH 85.31
1000    10.560
1/4   12.646
MPH   108.22

13.20 on the motor.

Looks good here - but then I have to tell people it's a sprayed 383
(  (wheres the 10?)

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org




More information about the Gmecm mailing list