Blown fuel/timing maps

[Raymond C Drouillard]

On Sat, 2 May 1998 16:28:44 -0400 "Bruce Plecan" <nacelp at bright.net>
writes:
>From: Andris Skulte <askulte at emerald.tufts.edu>
>Subject: Blown fuel/timing maps
>
>
>>For all you turboed and supercharged V8's out there... As most of you
>>know, the twin turboes will be going on the IROC this week. I need to
>>get a ballpark fuel and timing map for the DFI so I don't blow up the
>>engine the first time out.
>
>The best I could offer would be coping something off a syty (749)
>fuel/timing map and passing that along. 
>Come to think of it I guess could do the same for timing off a Buick
>V-6 for timing, it's maf
>The syty is a 4.3 (2/3 of SBC) so it might be best, let me know,
>it's a all typing exercise, so ain't gonna be instant (ie day or 2).
>No worries mate
>Bruce

Are you using a MAF or MAP system?  If you are using a MAP (Manifold
Absolute Pressure) sensor, simply extrapolate the table up into the >100
KPa region.  I don't have any experience with MAF (Mass Air Flow)
systems, but I suspect that you would similarly extrapolate the table up
into the higher airflow regions that were unreachable before.

BTW, the Holley Pro-Jection is a MAP system, and can plot up to about 130
KPa.  That means that it'll handle about a five PSI boost without
trouble.

Ray Drouillard.

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