Good day at the dyno!

[ehummelman]

I took the Firebird to Dynolab on Saturday and got some good numbers. Thanks to Jeff and Arthur, they did a great job. Surprising to me, the carb was dead on and showed extremely good A/F ratios. I think it was like 14.5 at cruise and 13 something at WOT, I can't remember exactly. The timing was a good bit off which I expected since I've been fighting it for a while. After taking 6 degrees out, Jeff was able to get the best numbers of the morning. It's at 32 degrees total. I have to say too that the cheap chinese HEI that lots of us were using is not accurate, it was adding almost 25 degrees mechanical advance when it should have only been 21. It's also right up against the firewall and is self adjusting itself (i.e. turning clockwise) as the engine torques and shakes and it rubs against the firewall. Rather than smashing in the firewall to make it fit, I'm going to a pro billet unit with external coil. I'm already running a 6AL box, and to be honest attribute a lot of my problems recently to the HEI design. Anyway, for a first dyno session I was very happy with the numbers. I don't know if the ambient temperature made a difference, but I will just mention that it was over 100F in Atlanta this weekend when the runs were made.

[Randy67]

Nice! Nice power curves too. I used Dynolab as well, pretty cool place.