[grivera]

Originally Posted by JLMounce

If there's anything weird happening, verify the balancer is indexed properly with a piston stop.

Many good suggestions in your post -however, this is something that I'm sure was done by Paul

Originally Posted by Va68goat

torqhead,

One thing to point out that may be important. The knocking noise sounds the same with Jeff Koerners carburetor as it did with the Street Avenger that was on the car before.

Based on the video alone the sound subsides with RPM. And, I wouldn't rule out an exhaust leak. However, you and Lynn are right there with it so I defer to his on site assessment. Does he also say it sounds the same?


JLMounce (Jason),
You make great points. We haven't checked the coil. That's something that Jeff brought up is for us to look at what I'm using now compared to what was not used in the dyno. That's the coil and the fuel pump. We will check out the coil but we did run a mechanics stethoscope on the fuel pump but there was no signature on the fuel pump. If we take the logic of checking what I am using now compared to what was not at the dyno, how could the distributor bushing be that damaged causing damage to the bearings, piston rings? The noise is the same as before.

Keep in mind different issues could be at play - for example you already found the interference issue with the windage tray early on - that would have caused a noise yet after adding clearance you still had the noise.

Originally Posted by Va68goat

We also eliminated the fuel pump and ran the motor off of the fuel bowls and the knocking noise was present. We also ran the motor briefly without the belts and the knocking noise was present.

As long as the fuel pump is physically attached to the engine it can make noise- even if you block flow.