Dyno'd my Duster 340 how did I do?

moper said

I've never seena dyno trace like that that wasnt dismissed as "something's messed up with the dyno..." It should be a smooth trace, not a hueg sweap back and forth. Converting from wheel to crank is still an approximate. But the ratio is roughly 1 to 1.2 for autos, 1 to 1.15 for sticks. Or, 264hp, 278tq. I think that's low. that package should be closer to 325hp 380tq if what you say is in there and in right. I would try tuning it a bit. I cant see the number well enough to say what direction to try. Just that you should try something. That reading is low. Even if the dyno was stingy, that's low.

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I think all of the dyno charts ended up wavy for everyone that dyno'd for some reason. And when they gave the printouts, they said to estimate the engine numbers by dividing the whp by 0.65. This is to account for drivetrain losses and the fact that the mustang dyno reads 15-20% lower hp. Dividing the 220 whp by 0.65 gives approximately 340 hp.

A friend that had a built 440 with aluminum heads, and a Mopar 509 cam, and some other good stuff and put out 308 hp after they tuned it, so if you would only multiply that by 1.15 he's putting out less than a stock 440 should make, which is definitly not the case.

I know I need to get everything tuned in. They said I was losing peak torque, because my converter was flashing too high. The carb is still in the out of the box settings besides float level and idle mixture, ect. and the timing definitly needs worked on. All I know is I have the initial set to around 10 and I don't know how fast it advances or the total timing. I'll probably mess around with a better distributer and have them tune everything in on the dyno sometime in the future.