1984HO

iTrader: (1)

hey guys im about to burn my first chip for my newly tpi LO5 in my 84 anyways the heads are the 193 swirl ports with some minor porting and polishing (DIY) anyways will the stock 89 l98 program be ok timing and fuel wise with these heads i was thinking of making a chip with maybe 5 or so less degrees of timing across the table just to be safe

i tried searching but could really find much info on spark curves for the 193's as compared to 083's


thanks

steve

91chevz71

Here's a stock ARJU.bin spark curve from my old TBI 350 with those heads

1984HO

iTrader: (1)

that is a lot less timing but that main spark table is set up completly different any idea how i can make mine look similar mine has a larger rpm range as well as mine has the y axis as LV8 and the the x is rpm, that might be reversed but you get the idea