hey guys, I`m wondering what the perf. gain is if I go to 1.60 from a 1.5 (rockers), I have a 455 bored 30 over with small chamb.( 0 decked) about 9.8 comp. 6x heads street strip ported pol. , 2.11 int. and 1.77 ex, ferrea valves, 92 cc( I think, can`t remember, but I`m sure we figured it then to be 9.8 comp.)), w/ trw forged pistons, edel. rpm w/ holley 850 dbl. pump, ultradyne solid (@50 dur. 247 int, 255 ex. gross valve lift 525 int, 540 ex. lobe sep. 108 ,msd 6al , billet dist. , in a 70 gto w/ muncie m20 / 3.73 rear,right now I have 1.5 harl. I had 1.65 harl. after about 500 miles a ex. valve bent (just one), Don`t know if it was caused by too much lift , so I went to 1.5`s, ( put about 1000 miles since, no problem)) . I would like to go to 1.6, but is there going to be that much of a gain. I mostly show the car, and drag it not often ( 3 times a year) not a daily driver, might drive 2 times a week, just to store or shows ect,, ran 110 in the quarter, times sucked ( no slicks) would the 1.6 be beneficial at all?? thanx for your input Forrest
|