No sir, I've seen many quality groove spacers with a LOT of time/passes on them, and no problems at all.
JUAN W said:Ok this is the story, my old combo was stock crank and rods,speed pro forged flattops with 2 valve relief, victor jr. an isky solid flattapet 254/259@0.050 .547/.548 lift, canfield heads,750 dp, my best e.t with this combo was 11.31 in a cold night. Then i bought a set of lunati pistons for 5.7 with scat rods and crank same damper and flexplate and the first pass was 11.24 in a hot day, the mechanic installed 4 pistons the wrong way and the valves was hitting the pistons from the begining, i broke a piston in the second pass but i am sure that i could ran at least 11.10 in the same weather conditions than the stock rods, both engines was 10.8 cr.
Now (check my sig) i am running 11.40cr more gears, a little big tires and cam and the best e.t. in winter is 11.01, i ran a best of 11.20 last fryday but the summer is very hot here. I really dont see a big diference between the 3 combos.
eldabo said:I think it all has to do with stacking.What I mean is if you do one thing that helps power a tiny bit you want see any thing ,but if you do 20 -30 little things it will make a big deference. Like longer rod ,4/7 swap , thermal coating , scuff coating on pistons, roller cam bearing, windage trays, areo counter weights, larger bore lifters,costom rocker ratios,top secert cam grind.etc,etc,etc, Just one of these probably wont make a night and day deference but all of them together will. Just my 2 cents.
David