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Re: EGT & E85
We use EGTs on road race cars, but not really in a way to save or do anything for the motor. Having an EGT probe on each cylinder is great for tuning with systems that can do individual cylinder trimming and power tuning, but most people, including the cars we do, usually only have 1 or 2 EGT probes. On the road race cars, we are most playing with the tunes to try keep the EGTs down enough to keep the turbo from melting. Road race cars never get a rest and the EGTs can build up to some high temps that eventually take out the turbo exhaust wheel. Having to slow down and come to a stop on the street once in a while is usually enough to keep a turbo alive forever on a street or drag car. 20+mins straight of beating with no stops can be a little hard on things and it can be hard to keep the EGTs down while at the same time running a safe tune for the motor at high boost.
I have 2 EGT probes and a wideband on a road race Evo. There is 1 probe in each bank of the twin scroll runners going to the turbo. They are wired to the factory ECU and the driver can log everything I need to know at the track using Evoscan and email the datalogs from each session.
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