Originally Posted by RIGGLE21

that is probably the best place for true temp. but what about the front 3 cylinders...are they 1400 degrees when the rear 3 are 1200...you would need to have another pyro on the front port aswell

Originally Posted by Begle1

I'm entirely serious. When you're injecting tons of fuel on a relatively poorly atomizing injection system like what's on a first gen, much of the excessive EGT's are caused by "afterburning" in the exhaust manifold. The fuel has air to burn, but doesn't have time to burn and put all its heat into the piston. The unburned fuel actually absorbs heat from the cylinder similar to water injection, then it finally gets around to burning after it leaves the cylinder. 1600 degree EGT's during racing or pulling on a twelve valve is hardly a sign of imminent failure, unlike common rails which have very efficient injection systems that burn fuel very quickly and do tend to melt pistons at 1400-1500 degrees.

So the relevant information a pyro gives on a modified first gen engine while racing or pulling is how fast it pegs. 1600 doesn't really mean much, what you really want to know is if it's hitting 1800 or 2000, how fast it gets there and how long it stays there after you get off it.

What it really is useful for is while towing or driving really fast up a hill or otherwise putting out sustained power for minutes on end, because that's how long it takes for the heat in the manifold to migrate to the cylinders. But even in that capacity it lies to you; advanced timing, better injectors or different cylinder bowls will cause more heat to be put into the cylinder than what you see on the pyro. 1250 degree EGT's with timing advanced a 1/4" is about as painful on the pistons as 1350 degree EGT's with timing at the stock levels.

Originally Posted by RSWORDS

#6 will always run hotter then the rest do to its location and the air flow so teh rear three "should" be teh hotter of the 2 groups.