Jackass w/ LS9: original build and new Jackass 2.0 updates!

[mikels]

Originally Posted by will69camaro

I'm hoping we can add timing and see more than just the 6-8% gain.

We are adjusting timing based on ethanol % and 6-8% is typical. I've never seen E85 gain more than that without additional airflow (in this case would be boost).

Did find higher percentages of ethanol (up to 85%) to be very knock resistant - when trying to hook the spark curve on dyno, would reach point where additional timing made no more power - but still did not generate knock. On pump gas typically start running into knock issues simultaneously with power gains flattening out - if not before (this on high cylinder pressure engine).

You are correct though that while 6-8% may not sound like much, when added to numbers in the mid 900's, it's quite a bit!

All numbers I quote are engine dyno as well - 1000 RWHP is a staggering number - and nearly impossible to achieve while maintaining the driveability level we have with this package.

Dave

[will69camaro]

Originally Posted by mikels

All numbers I quote are engine dyno as well - 1000 RWHP is a staggering number - and nearly impossible to achieve while maintaining the driveability level we have with this package.

Dave

Yea I dont suspect it will have the driveability as that package, but should be ok. Nice thing about turbos vs blowers is I can be more selective of when it makes big power.

I fully suspect that 1000rwhp will be in the neighborhood of 20psi, but time will tell.

William