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]

Just talked to the builder and he was more than happy for me to bring the car back by to check it again. As Jake mentioned, he said the engine would be loud because of the clerances until it warmed up. If the noise persisted after warm up then something isn't right.

Capt'n - the builder has been responsive thus far I wouldn't want to post thier name yet until I see how they deal with this issue. I'll post how they folllow up on warranty repairs and such.

Jake - Thank you for dropping in and posting your insight It's much appreciated. I'm pretty sure it's exactly what you mentioned on the cylinder to piston clearances. Yes they were JE forged pistons.

He didn't have notes on the deck height, though he said the cylinder to piston clearance was JE's manufacture specs. The engine was built over a year ago, but had sat uninstalled until 4 months ago. No fault of the builder, my previous mechanic turned out to be a nightmare.

I'm going to try to take the car in this week. I hope it's an easy fix. *crossing fingers.