Quote:
Originally Posted by PieNsky
Can't say for certain, on a AMC 1970 and later heads, if you touch the floor of the port, it will flow worse. It was designed to have that ramp on the floor of the port on AMCs. May be the same on our engines as they may have the shape there for a reason. Bench flowing for the correct porting would be expensive. RX may have just ported the heads and put it on a dyno without flow testing. That is just a guess. I will say that Tracy took three calls from to help me with questions regarding changing out the timing chains on my Camaro. Even went out and put a mechanic on the phone for chain alignments.
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It might not be about absolute flow though. Tracy could have well had the heads ported, and they might flow better on a bench, but that doesn't necessarily translate into more power on an engine. These engines are incredibly tuned, producing damned near 90 HP per litre. He could have opened the heads up a bunch, and screwed with intake and exhaust velocities, and destroyed scavenging or something like that. Or, if the intake velocity falls too much, it might switch to laminar flow, or be laminar flow for longer, and not get mixed with the fuel as well, resulting in poor combustion at high RPM's.
Clearly, something went wrong. Any of us are just going to be speculating with various levels of expertise. The main point is: He screwed people over hard.