L-72 Dyno Test

[COPO PETE]

CHEVY454; In my cars I run all the timing in at 2500 rpm. 20 initial and 36 total.Good luck. Let me know what your dyno says!

Marlin; Cars looks like it's coming right along. I love the shot with the old 1/4's hanging in the background. Good luck to you as well.
Peter

[69yenkoman]

Marlin:

Your car is coming along good. I like the old 1/4's haning in the background as well. Looks like you are doing a super job.:burnout
:

[YENKO DEUCE REGISTRY]

Thanks for the kudos, I can't wait to drive it. I also saved the deck lid and tailight panel, and plan on hanging them together in my garage at home. Brian Henderson has an original '69 Yenko Camaro 1/4 hanging in his shop as well, they look cool!
M

[Chevy454]

Well, guys, it's final: we put the L-72 on the dyno yesterday, and it spun it up to the tune of 420hp@5,600. This was through the exhaust manifolds, of course, but we were more after a good "break in" for the engine, and to try so different settings (jetting, timing, lash, etc.). Needless to say, we learned a LOT! The settings we ended with (lash=24,24 jets=78,84 timing=40 degrees) are a little bit different than what Pete used, but they worked the best for us, so we stuck with 'em. Now, I had better go see about getting that thing between the frame rails...

[JoeC]

WOW 420 HP with exhaust manifolds. Sounds great. Did it have mufflers hooked up also?

[Chevy454]

No, no mufflers, but the "dyno guy" said that a good set of mufflers (like a DynoMax) wouldn't change that much, except raise the torque a shade.

What we did was tune for a broad power curve, versus a higher peak. When we found that, we stuck with it. From 5,100-6,000 it was making 400hp or more, and was in the 416hp-420hp range all the way from 5500-6000. 6000rpm was about the most the engine seemed to like to run...now the only problem is keeping dad from spinning it over 7k!

[COPO PETE]

Congrats Rob....12.6 here you come!!!!!!!!
Peter