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Old 02-17-2005, 10:13   #1 (permalink)
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Not enough power, whats next?

Last dyno i ran 178.6rwkw on 5 pound boost
car uses a t03 turbo(internally gated), intercooler, fuel pump capable of flowing around 700hp, vortec rising rate fuel reg, and standard computer with a Chiptorque chip.
Currently when i boost it to 6 pound it'll start detonating, understandable.

Would the best thing to do be changing the computer and injectors if i want more boost running and more power?
if i do use a new computer, will the high comp with the AU engine matter at about 9 pound? or will i need that lower?
also, what size injectors should i be needing?
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Old 02-18-2005, 02:03   #2 (permalink)
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Re: Not enough power, whats next?

Running 9psi boost is pushing it for a high comp motor but as long as you get a good tune it will be okay. Get yourself a set of decent injectors, get rid of the rising rate reg and get a good tune, you may get away with running the chiptorque as long as you get it custom tuned, or even a unichip. Best option would be to go aftermarket though IMO.
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Old 02-18-2005, 20:39   #3 (permalink)
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Re: Not enough power, whats next?

Yep aftermarket where theres some boost reference.Where ecu can retard at max torque levels then advance over that to achieve better h.p....Colder plugs would help also...Infact a must...
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Old 02-19-2005, 02:53   #4 (permalink)
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Re: Not enough power, whats next?

On a six a general rule is 24lb injectors will do ~240rwhp, 30lb ~300rwhp, 36lb ~360rwhp. These will all be safe power levels for the injectors, meaning you could push for more at your discretion.

Unichip is a waste of money.
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Old 02-19-2005, 07:24   #5 (permalink)
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Re: Not enough power, whats next?

Quote:
Originally Posted by not ford
On a six a general rule is 24lb injectors will do ~240rwhp, 30lb ~300rwhp, 36lb ~360rwhp. These will all be safe power levels for the injectors, meaning you could push for more at your discretion.

Unichip is a waste of money.
Yep Roughly 50Lb = 100 h.p per cylinder...
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Old 02-20-2005, 07:38   #6 (permalink)
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Re: Not enough power, whats next?

sounds like i was right in my thinking. thanks for the help.
just wondering why i wouldnt need the fuel reg with bigger injectors? and is it possible to replace the injectors and get rid of the reg, yet still run the same chip / tune?
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Old 02-20-2005, 07:51   #7 (permalink)
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Re: Not enough power, whats next?

Quote:
Originally Posted by au-steve
just wondering why i wouldnt need the fuel reg with bigger injectors? and is it possible to replace the injectors and get rid of the reg, yet still run the same chip / tune?
The reg increases fp with boost which increases the fuel the injectors can deliver. It isn't the best way of doing it because they aren't really accurate and can fail. Instead, if you run larger injectors you can then just tune AF ratios with the EEC, this is much more accurate and reliable. And no you can't run the same chip.
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Old 02-20-2005, 22:30   #8 (permalink)
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Re: Not enough power, whats next?

im making 280 hp at the wheels on 7psi with 24lb injectors.........
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Old 02-20-2005, 22:45   #9 (permalink)
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Re: Not enough power, whats next?

In what car? Did you run your 14.2 with the same setup?
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Old 02-20-2005, 23:18   #10 (permalink)
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Re: Not enough power, whats next?

yes its a EF Fairmont, it only ran a 14.2 but at 103.8mph my A/F ratio is 11.7 too, but it does have a rising rate reg

setup is a 4lt with a T51R running just under 7psi, intercooler. engine is dead stock apert from 2.5" exaust and ED intake manifold for less intercooler piping.

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