FC3S Murray's never ending build.

[Rotary Inspired]

Ted I know you are big on tuning w/ the EGT gauge and one of the few I know of that are brave enough to use only the EGT to tune. What are you looking for in the logs of the EGT for the cause of this?

What are your thoughts on the cracking of plates. Everything I have seen points to a misfire which causes more strain on the block. I am wondering if the addition of the aux injection could have a cause on this. IMO there is not a huge need for aux injection at the 400 hp level. If you proceed upwards getting close to 500 is where it would be good investment.

Always willing to listen. Thanks in advance.

[RETed]

Originally Posted by Rotary Inspired

Ted I know you are big on tuning w/ the EGT gauge and one of the few I know of that are brave enough to use only the EGT to tune. What are you looking for in the logs of the EGT for the cause of this?

My thoughts on tuning with EGT here:
http://fc3spro.com/TECH/MODS/EL/GAUGES/egt.htm

I still don't like how hot the EGT's were, especially it's in the lower gears...

What are your thoughts on the cracking of plates. Everything I have seen points to a misfire which causes more strain on the block. I am wondering if the addition of the aux injection could have a cause on this. IMO there is not a huge need for aux injection at the 400 hp level. If you proceed upwards getting close to 500 is where it would be good investment.

If fuel was under control, it has to be ignition timing somehow...
Overly hot intake temps are basically out of the question, since aux injection was used.
Even misfires would register on the P-FC - unless the P-FC was malfunctioning and not showing true knock?

EGT's are still too high for under those conditions.
I would've liked to see them down in the 1300F range or even slightly lower.
I'm not an aux injection guru, so it's hard for me to confirm or dismiss the aux injection as a problem, but I always though the EGT's should come down due to the aux injection...

Do you mind posting your ignition timing #'s under those ranges?

Long shot...do you remember how much torque you guys put through the tension bolts when rebuilding?
Stock Mazda tension bolts, right?
Did you do anything funky with the adapter for the oil supply line to turbo in that same area?
Crush washer, right?
Approximate torque on the adapter?


-Ted