Join Date: Jan 2006
Location: Ozark, Missouri
Hot Rod December 2005 did a 5.0 EFI build. They tried to build a typical steet motor (starting with a junkyard 91 Mustang GT 5.0). They used Edelbrock Performer RPM heads, RPM II EFI intake, Comp Cams X#270HR cam (218/224 .544 lift), stock shortblock with 9.2:1 compression. They tested with no accessories and their best pull was 388 HP @ 6000 RPM. I would guess that the EFI motor would make a few more ponies than a carbed motor (but don't want to start that discussion!), and the 388 would probably be about 315 RWHP in a stick car. The motor had a pretty flat torque curve from 3000-6000 RPM (thank you fuel injection!) and hit 315 HP at 4500 RPM. That is a good steet motor.
Given it's a 302, a 289 with a similar build (carbed or EFI) would probably be about 285 RWHP (give or take 10 HP or so).
Plain Jane 65 Coupe w/ supercharged 4.6L DOHC, 10.5:1 compression, 10 psi boost, burns E85, 480 RWHP. (SOLD 10/2012)
Feature Car in December 2010 StreetScene (the magazine of the National Street Rod Assoc)