@Chevyman - I had this problem when I fired her up the first time. I thought it is a Valve problem ( becaus of verry low compression on 2 and 3) and pulled the head. The gasket was fine. I let the machine shop regrind the 2 valve seats and put the head back on with a new gasket.
@ all others: thanks for the help but:
Checked for vacuum leaks and ignition failure - even used a new set of sparkplugs and cables, distributor is new. 2 and 3 have still only a view ignitions (glas sparkplug shows the plugs fire fine but there seems not much to ignite) Carbs work good.
But it is even geting more strange.
As I said, the cold pipe is the one that comes from the front part of the split exhaust - the one with 2 and 3 with less compression (maybe because the valve seats are way deep in the head now - but not sure how much that makes)
As soon as I rev her more than 2500 when driving the temp gauge goes to the red.
I head her on the lift yesterday. Both pipes get equaly hot up to the glaspacks. The left (cold) pipe was even so hot that the pipe turned totaly blue. Because some sort of magic the gases seems to get cold wehen they pass the glaspack.
I have a crossover pipe 4 inches bevore the glaspacks.
Is it possible that the exhaust gases go back and forth in a strange way and instead of getting sucked out of the engine, while the exhaust valve on 2 and 3 is open, they get forced in, so I don`t get enough fresh gas in.
(oh I feel I run out of my english to explain this - I hope you guys know what I mean) does this make any sense or did I just get to much exhaust fumes?)
Thanks, Frank
