injetor type
07-02-06, 05:45 PM
#1
engineer wanabe
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injetor type
i have a early model s4 so it has the resistor box in it which means i use low imp injectors but i was wondering do i use saturated or peak and hold?
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07-03-06, 10:33 PM
#8
certified nutz and boltz
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Earlier ones are peak and hold - which are actually a more responsive product than the saturation (saturation are less expensive and do the job just as well for a stock rx7 which is prolly why the mazda swapped em out)
You'll want to keep using them and larger ones are easy to find aftermarket. ~rich
You'll want to keep using them and larger ones are easy to find aftermarket. ~rich
07-04-06, 01:50 AM
#10
Former Moderator. RIP Icemark.
Originally Posted by HeffBoost
Wow, the master gets one wrong. Low impedance = peak & hold.
"The peak and hold driver design usually has a resistance of 1.0 to 4.0 ohms. Battery voltage is applied to the injector until a predetermined current level is reached. The current is then reduced and held during the duration of the pulse width. It is imperative that the injector and driver characteristics are matched between injectors, so the switch from peak to hold does not occur out of sequence with the injector being fully opened. ...
"Saturation driver design usually has a resistance of 10.0 to 17.0 ohms, or a lower resistance when used in combination with a ballast resistor. The injector driver is fully on during the entire injector pulse width. This design reduces heat buildup and dissipation at the driver, but will have a slower driver response time.
"Vehicle manufacturers have designed the fuel delivery system around a specific type of injector, peak and hold or saturation. Any substitution of one type for another will result in injector damage and/or very poor performance." That's why all Venom high-performance fuel injectors are vehicle-specific, and they're matched to the exact factory coil resistance.
"Saturation driver design usually has a resistance of 10.0 to 17.0 ohms, or a lower resistance when used in combination with a ballast resistor. The injector driver is fully on during the entire injector pulse width. This design reduces heat buildup and dissipation at the driver, but will have a slower driver response time.
"Vehicle manufacturers have designed the fuel delivery system around a specific type of injector, peak and hold or saturation. Any substitution of one type for another will result in injector damage and/or very poor performance." That's why all Venom high-performance fuel injectors are vehicle-specific, and they're matched to the exact factory coil resistance.
07-04-06, 09:09 AM
#12
HAILERS
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I'm running two high resistance injectors in my car which has a N332. Both in the primary rail. I see no reason to worry. I used to think this was wrong, but no more. Now the other way around, a low resistance injector in a car built with a high resistance injector in mind, would give me reason to worry.
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