rebuilt engine knocking?, engine builder says its normal for big bore 4's? Options

[narino]

Alright I understand these cars don't have the quietest, smoothest runnning engines made, but does this doesn't sound right to me. There is a knocking sound at startup until she's warmed up. Then it smooths out, not completely though still can hear the knock.

The engine builder, who builds racing type IV engines says that the noise is typical with big bore type IV engines. Here is a link to a video, what do you guys think?

video
http://www.narino.com/images/914-knocking.wmv

Here is what the engine currently has inside it: (originally a 1.7)

103 mm x 78 Stroke
2.0 H beam 5.325 (? no idea what this is was on the paper)
G - Cam
44 x 38 Heads

Thanks in advance!

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[narino]

Thanks for the help guys.

Mike - I'm going to drive it a bit this week and then next weekend do an oil change. I'll let you guys know if I find any metal debris.

Ron - I'll ask about the cylinder to piston clearance. This sounds like what the builder said. Though after the engine is hot the knock is still audible. Shouldn't there be no knock? I'll run the car today and take a video of what the engine sounds like after it's hot.

Nate - There doesn't seem to be any exhaust leaks but I'll check again. I don't think they put 911 style adjuster rockers on it, but I'll ask tomorrow.

Sean - The video is taken just as it's started so the engine is cold. As mentioned before the engine smooths out and the knock lessens when the engine warms up. But you can still hear the knock. I'll rev the engine to see if the knock gets louder.

Things I'm going to ask the builder tomorrow:

Cylinder to piston clearance
Deck height
Did they install 911 style rockers adjuster?


Thanks again!

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