If you need 75-80lb. injectors would you go high impedance or low impedance?
12-20-2008, 04:12 PM
#1
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If you need 75-80lb. injectors would you go high impedance or low impedance? I see that I can get high impedance injectors that should support my 800rwhp goal but then see that many people go with a converter box and switch to low impedance. I'm staying with the factory ECM right now so can someone tell me why they would go one way or the other, Thanks.
12-20-2008, 08:47 PM
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I was doing some thinking, and our 83lb Siemens High impedance would work perfect for you, and i have never had any complaints about them.
Low impedance can be faster responding, but it isn't really worth spending all the extra money on a driver box or aftermarket ECM.
Send me a PM, I'll work a good price for you, and a deal if you trade in your stock or current injectors.
~Rich
Low impedance can be faster responding, but it isn't really worth spending all the extra money on a driver box or aftermarket ECM.
Send me a PM, I'll work a good price for you, and a deal if you trade in your stock or current injectors.
~Rich
12-20-2008, 09:02 PM
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I also need to bump up to a bigger injector for running e85. I much rather not spend the $500 on the driver box. How much harder is it to tune with that big of a high impedence injector?
12-21-2008, 01:27 PM
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12-22-2008, 11:31 AM
#9
It doesn't come with a harness that is plug and play, but all you have to do with it is jump in the middle of your injector wires and provide the box with power and ground.
If you feel you need an intermediate point for it (no cutting OEM wiring) then all you would need to complete this would be the connectors and mates. I have them in kits here:
http://www.lsxtune.com/shop/product_...roducts_id/570
http://www.lsxtune.com/shop/product_...roducts_id/451
With the price break for greater than 5 pieces, you get all 16 kits for $76 which should still get you in there well below $500.
I have looked at making the plug and play harness in the past but everyone wants a different length because everyone seems to mount the box in a different spot...
12-22-2008, 08:55 PM
#12
Sorry if this is retarded but I am still confused????
12-22-2008, 10:16 PM
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No, you still want 4 bar of fuel pressure. The injector flows 83 lbs at 58 psi of fuel pressure. If you were to run at 2 bar it would only be a 41.5 lb injector.
12-23-2008, 09:28 AM
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I am curious to. I will be running bs3 but not so sure I want to use 96ers just cause I can. Wouldn't one advantage to running a small injector be fuel millage since they a able to open and close quicker??
What about part throttle tuning?
Price? driver box aside
What about part throttle tuning?
Price? driver box aside
12-23-2008, 10:54 AM
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If running a BS3 you won't need a driver box, they can run a low impedance injector just fine.
The best reason to go smaller is ease of part throttle tuning, and especially idle tuning.
You can over injector so far that even set at the lowest settings possible for pulse, that the injector will dump enough fuel to flood the motor.
But the injector size has nothing to do with how fast the coils respond.
Think of over injecting an engine like trying to fill a shot glass with a fire hose, no matter how fast you turn it on and off, you are going to dump WAY too much.
The best reason to go smaller is ease of part throttle tuning, and especially idle tuning.
You can over injector so far that even set at the lowest settings possible for pulse, that the injector will dump enough fuel to flood the motor.
But the injector size has nothing to do with how fast the coils respond.
Think of over injecting an engine like trying to fill a shot glass with a fire hose, no matter how fast you turn it on and off, you are going to dump WAY too much.
12-23-2008, 11:24 AM
#17
If running a BS3 you won't need a driver box, they can run a low impedance injector just fine.
The best reason to go smaller is ease of part throttle tuning, and especially idle tuning.
You can over injector so far that even set at the lowest settings possible for pulse, that the injector will dump enough fuel to flood the motor.
But the injector size has nothing to do with how fast the coils respond.
Think of over injecting an engine like trying to fill a shot glass with a fire hose, no matter how fast you turn it on and off, you are going to dump WAY too much.
The best reason to go smaller is ease of part throttle tuning, and especially idle tuning.
You can over injector so far that even set at the lowest settings possible for pulse, that the injector will dump enough fuel to flood the motor.
But the injector size has nothing to do with how fast the coils respond.
Think of over injecting an engine like trying to fill a shot glass with a fire hose, no matter how fast you turn it on and off, you are going to dump WAY too much.
that's true, but I have been involved with more than one set of 160lbers and BS3 on 402" motors that idled beautifully at 43.5psi rail pressure.... good luck doing that with a stock PCM and driver
