Dyno Tuning

[WOLFEMAN]

BDR #369 has a new FMS 392 and Holley 770 Street Avenger. I'm having a baseline dyno done and dyno tuning in a couple of weeks but am wondering about the need/benefit of dyno tuning while it's in the shop. The engine was installed in Florida recently and I suppose it was initially "setup" but not dialed in. Am I right or am I wasting my money on the tuning?

[Dennis Kelley]

Best money you will every spend. Don't get hung up on the numbers. Make sure the dyno has an oxygen sensor wide band. Tune for a 12.5 air fuel ratio.
Take a timing light, and jet for your carb. Good luck. The dyno is worth it but we don't race dyno's Let me know the numbers.

later

dennis

[WOLFEMAN]

It may be overcarbeurated with the 770 and I know the pipes cost me a lot of RWHP. The tuning is setup for 3 weeks down the road. I'll post the numbers. I've heard that these guys are good tuners so hopefully, we can max out the hardware I have and then I can make a determination on modifications.

[Dennis Kelley]

I doubt you are overcarbed. What heads are on that 392? I run a 650 dp on a 302 so I doubt you will have a problem. The type of heads you run usually determines what total timing you engine likes.

later

dennis

[WOLFEMAN]

It has GT40 heads. I believe the initial setup was 20 degrees.

[Dennis Kelley]

Just for your info I picked up 57 hp at the rear wheel with timing and jetting. Car drove like a dream after the dyno.

later

dennis

[WOLFEMAN]

That's significant. Mine drives great now. If my increase was comparable, I'd be elated. I'll post the numbers on this tread in a few weeks.

Thanks for your insight.