OK this thread is for people to post up what PSI, timing and octane they are running. Ive been scratching my head trying to figure how hard I can push my 5.3 with 93 pump gas so hopefully this thread will help. When I had the truck tuned it was tuned for 9psi and 16 degrees of timing. I recently turned it up to 13psi to beat a modded 5.0 and I was wondering how safe it is. I know I shouldnt have done it without running a log to see if I have any KR but it ran like a scalded dog. AFR was right at 11.0. How much boost/timing can I safely run on pump 93 octane? No meth right now and E85 is out of the question in Louisiana.

 

You bumped it up to the same psi as I did trying for 6's in the 1/8th. I was only at 12.5 degrees of timing on 93 though.

I take it your sig needs updating...

 

What I would like to see is a screen shot of somebody's log showing nothing but RPM, Boost, and Timing from idle to redline.

 

im gonna have to look at my old tune/logs, but i wanna say i was running 18* at 6psi on 93 oct..
Even used the same timing for the 47 shot and never heard it complain

 

10-11psi, 18-19 timing, 93 oct with some meth

 

If i can find my jump drive ill do that at lunch time.

 

Yea it needs a little updating lol. I guess I need to do some logs and see what's happening

 

22psi, 16°, 50/50 E85/91.

 

13psi, 11 degrees timing, 50/50 meth/water, 11.5 afrs..

 

I don't think any 2 combos will be the same - intake temps, compression ratio, and where the timing is plays a factor in how much you can run.