I was just wondering if anyone was running 720cc injectors and if so what your constant was in HPTuners? I'm just looking to see what others are using to make sure i'm in the right ballpark. I've used the formula and got about a .072875 does this sound about right?
President/Founder - 607 Motorsports
it all depends on what your stock injector constant was, i started with the gm reflash inj constant being 0.32359 and then threw in my 750's.
did the calculation being new constant = old constant x (old inj size/new inj size) so i went .32359 x (310cc/750cc) and got .133750 for my new constant
That reflash constant alone makes no sense to me lol. The stock 252's have a constant of about .20250... larger injectors should make the constant go down yet GM made it go up...
Anyways my car is a 99 so no reflash for me. My original injectors were the 252's and the .20250 constant.
President/Founder - 607 Motorsports
jimmyc99z24 wrote:That reflash constant alone makes no sense to me lol. The stock 252's have a constant of about .20250... larger injectors should make the constant go down yet GM made it go up...
Anyways my car is a 99 so no reflash for me. My original injectors were the 252's and the .20250 constant.
One of the many hacks in the GM S/C tune to make the thing work. They made the injectors look smaller so they would get longer injections.
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Shifted wrote:jimmyc99z24 wrote:That reflash constant alone makes no sense to me lol. The stock 252's have a constant of about .20250... larger injectors should make the constant go down yet GM made it go up...
Anyways my car is a 99 so no reflash for me. My original injectors were the 252's and the .20250 constant.
One of the many hacks in the GM S/C tune to make the thing work. They made the injectors look smaller so they would get longer injections.
Hack is right and I even saw some stuff in a stock 01z tune that was interesting
Shifted: Have you or have you heard of anybody getting good results with using the stock Z injector size with the "new constant = old constant x (old inj size/new inj size)" formula as opposed to using the Reflash numbers?
