[ZLRob]

Originally Posted by KingLT1

Reliable power can be had "If" you upgrade fuel system and run Ethanol.

Non-Reliable power can be had "If" you just want to slap a supercharger on, run pump gas on stock fuel system.

Here is the rub. 93 octane and boost doesn't bode very well for a 11.5-11.8:1 compression motor. Yeah some will say you can make 550-575whp on a dyno with that setup and it will on a cooled down dyno pull. The problem is the dyno is not the street. Your realistic power on the street will be lower 500-520whp range because timing will need to be pulled at very conservative IAT's to keep detonation at bay.

The solution for consistent real-world power is octane. Meth or E are good solutions...I prefer Ethanol on a stock piston LT1 motor because basic meth kits are not great for distribution. All it takes is to have one cylinder not getting the same amount of meth as the others and boom. And it doesn't take much because meth systems seem to work great on LT4's and other forged piston motors. It's just the LT1 has a very low tolerance for detonation and high cylinder temps. I guess one way to ensure all cylinders are getting enough meth is to run a richer AFR. I would tune for .78-.80 if you decided to go that route. Don't try to run the DI system .90 and use the meth to get the AFR to .83. Probably speaking greek but you might find this info useful down the road at some point.

All of this right here.

I should probably mention that if you are going to add boost you need to step down the plugs to heat range 6's assuming you are running higher 500's wheel HP range. If you ever step into the 600's in wheel HP range then you need to run 7's as changing our plugs to a step colder over the OE heat range 5's help remove as much as 100* C from the combustion chamber.

Dialing the fuel in the fuel in right, and having the right plugs for your configuration as well for a higher compression motor like the LT1 is very important.