Armed with a couple of thermocouples, I am going to start logging the EGT on my GTR.
The problem is mounting the thermocouples. I know ideally, I should use 2 and mount one in each manifold between the exhaust port and the turbine (or even one per cylinder), but this isn't really an option. I don't feel like pulling the turbos off for no reason.
The other option would be in the dump pipes, just after the turbines (ala BNR34 vspec), but again, I don't really want to pull the turbos off to get the dumps out, and I'd rather not weld a pair of bosses on the HKS dumps.
So...I was thinking of mounting one thermocouple on each branch of the front pipes, as close to the flange as possible. That way, I'd end up with the thermocouples maybe 10 inches away from the turbines. Will this be close enough?
What sort of EGT's are something to be concerned about?