Hey guys like the title says I'm looking for a few of these timing tables to play with and or VIN if you want to share. I'll FINALLY be getting my LT383 (XFI280) together fairly soon and I'd like to get a baseline setup for it while I wait. Also I'll be getting ANOTHER LT1 from a friend to swap Into my 91 using the stock computer and harness (Ebl P4 soon enough) and I'm tossing around either the XFI268 or the tried and true hotcam as the 91 is just my DD. So anybody got any tunes they'd like to share?

 

Real LT1 motor with factory style LT1 heads? If so they seem to like timing. Like a vette 113 head.

I did a 280xfi on an afr 190 head thats very similar to ported 113 or lt1's and it liked 40 deg around cruise maps and lower rpms, had 28-30 near idle bands of 700-1000 rpm ramping in quickly to 40 by 1600-1800 or so. Wot was 36 deg all in by 3000. Heavy throttle areas in between ramped down from 40 to 36 slowly. Higher rpm no load vacuum areas were 40-42 deg

But this was a low comp 360" sbc deal. High comp high dynamic comp stuff will not tolerate as much timing in certain spots so becareful

Heads determine what a motor wants for timing as burn efficiency/characteristics determine cyl pressure and timing will go hand in hand with that to find how much pressure your fuel will tolerate

 

Both engine are real LT1's. The 383 will have about 10.1 and the stock LT1 should be at stock compression..

 

Anybody? I just need the timing tables. The fuel I can do on my own.