This is not a tale of over the top HP, but rather a accounting of a real world street car engine.
I know its not a run on my 40, but we finally have a local Dynojet (yeah !) so I brought out my '65 Mustang Fastback to finally record a dyno run on the engine I built for it some 3 1/2 years ago (it now has @ 1600 miles on it) the original run was for a '68 .030 block, stock bottom end, stock heads, Performer manifold, performer cam, Holley 1850, 1 5/8 Hedman headers.
This basline run back in 2001 posted a whopping 168.9 RWHP @ 4400, 223 RWT @ 3400. This with a std. C4 trans and 2.80 gears. This equates to about 219 FWHP, 290 FWT
Yesterday even though it was a bit warm (80-85d) the new engine: FMS B50 Hyd. roller short block, FMS windage tray, milled .030, lightly ported GT40P (Iron) heads (9.7:1), FMS roller rockers, Crane 2031 cam, same performer manifold, same Holley 600 cfm carb, 1 1/2 Tri-Y headers to 2-1/4" exhaust.
Even though the HP came in a bit less than I would have liked but I was quite pleased with the torque #'s, the run produced 238 RWHP @ 5400 and 272 RWT @ 4100 this comes to about 307 FWHP and 351 FWT, thats around +80HP & +60 lbs.Torque at the flywheel, +70 and +49 at the wheels respctivly and the power just leveled off and stayed the same for the next 400 RPM where I shut it down and then backed it up with an almost identcal run, BTW air/fuel was 12.90 the whole way (no tuning) how about that. I must also mention the car weighs in @ 2900 lbs.
I am aware that the numbers are probably not impressive to most of this crowd, but to put things into perspecitve:
'65 Shelby GT350 306 FWHP, 329 FWT
'96 Ford Mustang Cobra 305 FWHP, 300 FWT, 3354 lbs.
'99 Ford Mustang Cobra 320 FWHP, 314 FWT, 3425 lbs.
'04 Ford Mustang Cobra 390 FWHP, 390 FWT, 3660 lbs (+760 #)
'05 Ford Mustang GT 300 FWHP, 315 FWT, 3425 lbs.
Did I mention that this engine build, including balancing was done for $2750, I cant wait to get the Posi unit with some gears in it, and I really cant wait to put enough miles (@ 100 now) on the 40's new engine to dyno it, I'm figuring with the AFR heads and other small touches it should produce 50-60 more HP and I would be happy with the same torque numbers but probably it will see 5-10 less. I'll let you know
I know its not a run on my 40, but we finally have a local Dynojet (yeah !) so I brought out my '65 Mustang Fastback to finally record a dyno run on the engine I built for it some 3 1/2 years ago (it now has @ 1600 miles on it) the original run was for a '68 .030 block, stock bottom end, stock heads, Performer manifold, performer cam, Holley 1850, 1 5/8 Hedman headers.
This basline run back in 2001 posted a whopping 168.9 RWHP @ 4400, 223 RWT @ 3400. This with a std. C4 trans and 2.80 gears. This equates to about 219 FWHP, 290 FWT
Yesterday even though it was a bit warm (80-85d) the new engine: FMS B50 Hyd. roller short block, FMS windage tray, milled .030, lightly ported GT40P (Iron) heads (9.7:1), FMS roller rockers, Crane 2031 cam, same performer manifold, same Holley 600 cfm carb, 1 1/2 Tri-Y headers to 2-1/4" exhaust.
Even though the HP came in a bit less than I would have liked but I was quite pleased with the torque #'s, the run produced 238 RWHP @ 5400 and 272 RWT @ 4100 this comes to about 307 FWHP and 351 FWT, thats around +80HP & +60 lbs.Torque at the flywheel, +70 and +49 at the wheels respctivly and the power just leveled off and stayed the same for the next 400 RPM where I shut it down and then backed it up with an almost identcal run, BTW air/fuel was 12.90 the whole way (no tuning) how about that. I must also mention the car weighs in @ 2900 lbs.
I am aware that the numbers are probably not impressive to most of this crowd, but to put things into perspecitve:
'65 Shelby GT350 306 FWHP, 329 FWT
'96 Ford Mustang Cobra 305 FWHP, 300 FWT, 3354 lbs.
'99 Ford Mustang Cobra 320 FWHP, 314 FWT, 3425 lbs.
'04 Ford Mustang Cobra 390 FWHP, 390 FWT, 3660 lbs (+760 #)
'05 Ford Mustang GT 300 FWHP, 315 FWT, 3425 lbs.
Did I mention that this engine build, including balancing was done for $2750, I cant wait to get the Posi unit with some gears in it, and I really cant wait to put enough miles (@ 100 now) on the 40's new engine to dyno it, I'm figuring with the AFR heads and other small touches it should produce 50-60 more HP and I would be happy with the same torque numbers but probably it will see 5-10 less. I'll let you know