Hello. Ok, I bought this guys car and it came with log in name aswell as a tuner. The car is modded with a ported through ought L67. The valve train has comp cams pro magnum 1.9 roller rockers,105 springs, titanium retainers, high tech pushrods and LS7 lifters. Still running the stock timing chain. My question is how high can I safely set the shift point with all those parts? Thanks.

Is this a Series 1 or Series 2 L67? What is it in? What other supporting mods have been done? Has anything been done to the transmission?

4" CAI, N*, (P&P gasket matched m90, LIM, heads,) pro magnum 1.9 rockets, comp 105'*/titanium retainers, ls7 lifters , zzp headers, zzp 3" exhaust, tune. Trans is a low k stock 3.29 gears with 3000 stall and a trans go shift kit and zzp trans pan and dex 6.

All these fancy parts he'* listing off and still doesn't know if its an Series 1 or 2 and never tells us what the car is. https://www.gmforum.com/buick-172/an...n-making-post/

We need to know what kind of car you have so we know what the trans is. Meh, it doesn't really matter anyway. You put any kind of huge power behind these 4L60,65E'* and you will eventually kill them. Stop putting money into the engine and put it into rebuilding the entire trans with harder parts.

Almost non of the parts listed work on a series 1. Also I don't think I can tune a series 1 with a tuner. The ***k mods a series 1 with a 4l60 lol

It'* a 65e upgraded to a HD. The car is a 99 Grand Prix GT. The car doesn't valve float and neither does the trans. Lol I don't give ***t what car it'* in or what trans it has. I could put this in a friggen smart car with a getreg or a Toyota with an asin and I'd still have the same valve float at the same rpm with the same valve train mods listed. Thanks for sweet f all. Lol