I am having some kr issues with my new motor. its a 5.3 with 3.810 ls pro forged pistons, texas speed stage 2.5 heads, head studs, gen 4 rods, small summit cam 209/217 550 lift 112+1 cam with long tube headers. Im trying to get it safe to drive around and brake in but the timing retard seems a bit too much for me. i have pulled some timing in the low load areas .08-.52 airmass areas and it did not really seem to help at all. Im not hearing any knock or any engine noise (other then a squeaking belt that im replacing tomorrow). I have never fully tuned any thing like this before. only done fuel corrections on a cammed truck i paid someone else to tune and they screwed it all up. Im just not sure where to start timing wise. I know with better heads they may need less timing but im just not sure where to start. i have attached a tune and log. any help would be greatly appreciated. Just trying to get it safe tell the lsa blower arrives and i can take it to a pro for a dyno tune.

 

what octane fuel your running? Any fuel upgrades?

 

I just put 32 gallons of 93 in it and stock injectors for now. We have a set of fic injectors coming for the lsa and will be doing the fuel system at that time. I figure for now we should be able to putt around on the factory injectors. I know they won’t do wot or anything but should be able to cruise down the road.