High injector duty cycle for my power??? :S
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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?
Last edited by NW Iowa WS6; 04-20-2011 at 10:39 PM.
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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
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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?