Guess!
With some of the early guesses, I wondered if I was missing something, like maybe dog grooming. Honestly, I was hoping to hit 420 hp, but dyno time is expensive, and I wasn't going to get greedy on my dime. The customer was satisfied, so I left it be, even though there were a few more left. We didn't even pull plugs to look at fuel distribution between cylinders. Too much time wasted fitting the customers headers. With the dual plane, some staggered jetting may have netted a couple more numbers. Overall though, I guess it turned out ok.
I was a little surprised that it wanted so much timing. It has good quench, and stock heads with quench don't usually want near that much, in my experience.
This motor is a perfect example that you can make good torque numbers with a low DCR. Once the motor spins faster than cranking speed, inertia and ram tuning takes over, and the DCR has less effect on cylinder pressure as the volumetric efficiency increases.
It should work well in the customers application, but I recommended he throw a 3.91 gear in the rear eventually for better street/strip performance. With the right chassis setup and converter, low 12s or better should be possible.
And TrailBeast is the hero of the day! :thumbsup: He's darn near clairvoyant.:D Lots of good guesses, and I appreciate the feedback.
With some of the early guesses, I wondered if I was missing something, like maybe dog grooming. Honestly, I was hoping to hit 420 hp, but dyno time is expensive, and I wasn't going to get greedy on my dime. The customer was satisfied, so I left it be, even though there were a few more left. We didn't even pull plugs to look at fuel distribution between cylinders. Too much time wasted fitting the customers headers. With the dual plane, some staggered jetting may have netted a couple more numbers. Overall though, I guess it turned out ok.
I was a little surprised that it wanted so much timing. It has good quench, and stock heads with quench don't usually want near that much, in my experience.
This motor is a perfect example that you can make good torque numbers with a low DCR. Once the motor spins faster than cranking speed, inertia and ram tuning takes over, and the DCR has less effect on cylinder pressure as the volumetric efficiency increases.
It should work well in the customers application, but I recommended he throw a 3.91 gear in the rear eventually for better street/strip performance. With the right chassis setup and converter, low 12s or better should be possible.
