Awesome kevin. How much boost were you peaking at, and what rpm were you spinning to? Also, were you intercooled other than chemically?That's good feedback. Makes me question my 12* timing without meth.
We started tuning with 7* and went up from there.
Yes, car also uses a large IC along with the meth inj.
All runs are through full length 2 1/2" exhaust.
Boost on the 91/meth was 19psi through manual trans
= 720hp max rpm 6500ish?
Boost on the 91/meth was 25psi through auto trans
= 700hp max rpm 6500ish? We had fuel distribution issues so stopped at 700hp.
Boost - 1 on E85/meth was 15psi through auto trans (new cams) = 840hp max rpm 6200
Boost - 2 on E85/meth was 32psi through auto trans (new cams) = 902hp max rpm 6200
We tried everything to add more timing but no matter what we did the engine just didn't like it so we obviously just tuned it for max power.
I also run a Safeguard Knock Detector
which monitors knock in each cylinder. When running straight 91oct (no meth) the knock detector lit up like a xmas tree at only 7psi of boost. In other words: If you don't have a knock detector you could be detonating the sht out of the motor.
I run several key electronics to monitor the engine to make sure it stays safe and, IMO, they are absolutely required when running pump gas or pump/meth:
1. Safeguard Knock Detector
2. Lean Protection Module with dual widebands