Disappointing dyno results

jawbone said

Hi ch1ll. Regarding Carter AVS. Dyno operator only had a lager Holley which yielded similar results. He will receive 600cfm Holley for pull tomorrow if weather permits. Humidity is currently high. Operator does not have any replacement jets or metering rods. The Carter I had rebuilt was stock unit for 68 or 70 340 4 speed application. Can't remember which. Would only think jetting would be correct.

Cam is from Camcraft. I know, you never heard of them. Wish I hadn't. Only looking to make stock horsepower. That's all I can expect using stock engine components.

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Your still not telling me if you cc’ed the cylinder with the piston at top dead center. This is going to make a difference in CR. I doubt your going to make stock hp with less than stock compression. Compression is a huge part of the equation.

If he didn’t have jets, he should not have even loaded it on the dyno till he did.

Did you have the advance curve checked?

If anything, your avs is too small. Using a dual plane intake, 4 cylinders are only getting 275-300 cfm. The other 4 are getting the other half of the carb. Think about that.


Did he have jets,air bleeds,power valves to tune the holley he used?