What is an acceptable max temperature for the engine block? My manifolds are a little varying in temp using a temperature gun, 1, 2 and 4 seem to be low 70s where as no 3 runs a good 10°C hotter with the block measuring high 90s bar cylinder 3 again which i just got 120°C with my gun. Seems a bit improbable to have such a gradient so close together.
Incidentally, doing a plug chop only no3 was close to the pale brown colour on the white insulator section.
*following this i decided to double check my dynamic timing which is looking spot but there is a but, and I think it may be interesting. On 1 and 4 I cant get the timing light to flash consistently, thus has got me questioning the 1-4 coil or its leads. Another observation is that when raising the revs from idle it gets to 2000/2200 they fly past 3k to 4 with literally no control, I cant hold 3k for love nor money. Is this the switch from pilot to main jet causing problems?
