I found the problem...
I had a turbo failure yesterday so I spent the better part of to day pulling all of the turbo stuff off and putting my old 4-1 header and N/T exhaust back on .While I was at it I welded an egt bung on.So after it all was back together, I took a test drive and egts under...
If that were the case my EGT at cruise would be much lower
the EGT problem only occurs at lean AFR and Low manifold pressures
...The problem has gotten better since I added more timing to my spark map in the problem areas but there still in the 1300*f range
I understand all that
However I'm still curious why the EGTs are higher at low load and not during high load .If it were due to a restrictive turbine housing (small AR) or a restrictive manifold the EGT should higher all the time or at least during high airflow
The temperature issue only...
What would be the best way to check a gauge?
The timing is correct. (I would never even own a dial-in timing light) I had the same thought though so checked my base timing from idle to 3000 rpm , it doesn't fluctuate from the 5* its set at and the programmed advance is spot on.
I also forgot...
What is an acceptable EGT range for light/mid cruise?
Right now they hover in the 1350-1400*f range while at cruise (50-60 kpa @ 3000rpm)
the engine is a 1755cc mitsu 4cyl
9.5:1 compression
Ive tried AFRs from 14.5 to 17:1
and ign lead from 36 to 42* btdc
No mater what Ive done they wont...
