NW Iowa WS6

iTrader: (9)

Ok I dyno'd and tuned about a year ago on a mustang dyno and preliminary numbers for the mods in my sig were 366hp/341 torque. I have a bone stock fuel system with the 28lb. injectors and after tuning my final numbers there were 382/354 but the guy told me his dyno is really low compared to a dynojet and I should be in the 430hp range on them. So after last year at the tracks my times and track speed didn't add up to a car in that nice power range with a best of 12.52@113.7 with a 1.97 60foot(4432 DA) and so I went to a dynojet recently and I did 383/367 which makes more sense with a stock weight stock drivetrain 380 rear wheel fbody. Weird thing though is my injector duty cycle depending on the outside air temp on my hptuners is between 91 and 94% and 59psi fuel pressure. Both times I dyno'd the wideband was between 12.5 and 12.7 from 4000rpm-6600rpm Anybody esle think this is a ridiculous duty cycle for a fairly weak cam and bolt on car?

NW Iowa WS6

iTrader: (9)

My main thing for wondering here, is their something wrong I should look for? I wanna retune at a different dyno and change to an e85 speed density tune for more power with my same mods and I know I'll need bigger injectors but shooting for about 400 rear wheel I don't wanna need 60lb. injectors for a NA car in that power range

FICINJECTORS

iTrader: (30)

First of all the stock injectors are 24 lb at 43.5 they call them 28 because the fuel pressure in your car is 58. At 430. Hp ds will be in the 90's.. You should have a 30 at 43.5 which would run at 36 at your pressure. Now add 35% to the 30 for the e85. So you need a 42 rated at 3 bar which you scale at 50. 60 siemens that are sold for the ls1 will be 72 at the 58 so they would be way too much.

NW Iowa WS6

iTrader: (9)

Thanks for the help, that makes a little more sense. A 42lb at 3bar using your websites calculator would be about perfect it looks like