Head temp differences, How big is too big? Options

[lapuwali]

I recently fit a CHT gauge, and originally put the sender under the #4 plug. Readings were in line with what I've read here: idled at 300dF, cruised at 325-350dF, touched 400dF under heavy load (lots of long uphill grades here).

I moved the sender to the #1 plug yesterday, and the temps are as much as 50dF lower across the board. Idles at 250dF, cruise about 300dF, never exceeds 350dF even pulling up a long hill.

I expected a difference, but not 50dF (20%!) between heads. I'm running Webers, so it's possible I have completely different mixtures for each cylinder. I presume cooler head temps would usually mean richer? This would be in line with plug colors (blacker on the 1/2 head, tanner on the 3/4 head). Hmmm....

[Jake Raby]

Yes, the mold is being made now... It loks 100%factory but much cleaner. we pulled the outside of the mold from a cleaned up stock TIV shroud.

The inside will be fully adjustable on the test shroud..

I will perfect it after the 911 system. The Type I DTM is almost perfected, then comes the 911, and then the 914!

Wait till you see my method of creating more ashroud pressure, it'll blow ya away!

I'm totally involved in coolibng system stuff now, just bought a new 16 sensor data logger for the dyno, it reads in real time and downloads every 10 seconds into the P/C!