4.9L Cadillac with Allante Intake Manifold (Page 2/2)
Will JUL 26, 07:40 PM
I used 19# Ford Motorsport orange top injectors in my Northstar to make 312 RWHP... so 19's have the headroom for whatever you want to get out of the Allante 4.9.

Interesting to see the differences in VE.
Does the timing drop dramatically between the 4400 RPM power peak and the 5200 RPM top of the VE table on the 4.9? Is there another factor that reduces fuel flow that would result in fuel flow matching real world power?

BSFC varies a little bit, but generally not much at constant MAP, which covers WOT.
sanderson231 JUL 26, 10:32 PM
4.9L Main spark advance vs RPM vs MAP - EGR off

RPM 85kPa 90 kPa 95 kPa 100 kPa
4000 33.3 32.0 32.0 32.0
4400 35.2 35.2 34.1 34.1
4800 35.9 35.9 35.9 35.9

Not much going on - assume 35.9 holds for 4800+ rpm

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formerly known as sanderson
1984 Quad 4
1886 SE 2.8L
1988 4.9L Cadillac
1988 3800 Supercharged