1985 Mustang GT w/GT-40p Heads Dyno Test

Lamotta Performance in Longwood, Florida, conducts a test of Chris' 1985 Mustang GT. Specs: Remanufactured 302 with GT-40p heads, shorty headers, 2 1/2 true dual off-road exhaust, Holly Street Avenger carb, Edelbrock Performer intake, Cobra-spec cam, 3.27 gears.

Category:

Autos & Vehicles

Tags:

• Mustang
• Ford
• GT
• Dyno

[gtdrummerdude]

What rpm was your max power at?

[radiochris1]

Max HP was at 5200 rpm, max TQ was at 3800

[radiochris1]

Jake Lamotta, who installed the crate engine, said it performed better than he would have guessed. He's the expert (owner of Lamotta Performance), so I trust what he says. It's way more power than I need!

[TheDylan222222]

wow very nice 85 gt are the 85s carberated?

[radiochris1]

@TheDylan222222 - Thanks! 1985 was the last year of the carb'ed GTs

[CDF302v8]

What are the specs on the Cobra cam?

[radiochris1]

Just a stock 1995 Ford Cobra cam

[TheCadenBoy]

@BigBoyd06 230hp to 260hp is actually the average for a GT40 or GT40p standard bore 302. Port work can them them closer to 275hp to 300hp range.

[TheCadenBoy]

@CDF302v8 It is similar to the B-303 cam specs, I believe...

[mindfuckerification]

what timing are you running cause those numbers are awfully low.

[gtdrummerdude]

What was your a/f ratio during the pulls?

[roush480]

is that 238 hp to the wheels?

[gtdrummerdude]

@radiochris1 He has no experience with these heads then. We have GT40P headed Mustangs with very minor port work in the high 11s with letter cams here in AZ. They are capable of putting 300 hp to the tires without any port work at all. VERY, VERY good heads with the right combo.

[gtdrummerdude]

@radiochris1 The Performer intake is your problem, and the Cobra cam. It is little more than a stock 5.0 cam. The Performer only flows to 5500 rpm and the GT40Ps like to turn 6000 or more, they flow 200/140 cfm right out of the box. I have GT40Ps with a Performer intake and I can feel it nose over at 5700 or so. Even with the crappy intake and a flat-tappet cam, I trapped 104.2 mph shifting at 6,000 every gear. It is getting an RPM Air Gap and E-fan next week, looking for 270 whp.