Inj Duty Cycle
02-12-04, 11:35 PM
#1
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Inj Duty Cycle
Hey guys I just took my FD for a spin to check something out.. I was doing some pretty hard pulls on the intersate and afterwards I looked at the PFC peaks.. I noticed that my peak injector cycle was 85.8% Is this safe? Im still running stock injectors.. The pull was on third gear all the way to 8100rpm..
Thanks
Flipn
Thanks
Flipn
02-12-04, 11:38 PM
#2
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there is nothing wrong with maxing out your injectors. my firend is hitting 100% duty cycles and theres nothing wrong with that its just your decreasing your margin for failure.
its not a good thing but there's nothing wrong, thats all
its not a good thing but there's nothing wrong, thats all
02-12-04, 11:41 PM
#3
The more you increase your duty cycle the more risk you are running off a failure. 85% is the max I would go, but this is also a highly debated issue on the forum. The higher the duty cycle the more risk of running lean, and we all know what this leads to.
02-12-04, 11:47 PM
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im have it set on .90 bar but on this run i only hit .80 bar.. (PFC Peaks) I guess im semi-okay right now.. But a new fuel pump and new secondary injectors are going to be on my list of mods soon... Thanks
02-13-04, 02:12 AM
#7
Originally posted by jspecracer7
It is NOT safe to run injectors past 85% duty.
It is NOT safe to run injectors past 85% duty.
Check out this thread:
https://www.rx7club.com/showthread.p...hreadid=259912
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02-13-04, 03:03 AM
#9
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Originally posted by SpeedKing
I thought so too, but I take this now to be a misconception.
Check out this thread:
https://www.rx7club.com/showthread.p...hreadid=259912
I thought so too, but I take this now to be a misconception.
Check out this thread:
https://www.rx7club.com/showthread.p...hreadid=259912
02-13-04, 07:21 AM
#10
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I hit 93% last night. I think not going above 90% is a good rule of thumb. I believe I heard somewhere the OEM injectors can handle higher percentages when compared to some aftermarket injectors...I.E, they have less of a chance of sticking @ high usage.
I wasn't too concerned because I had the trusty WI kicking in above 10 PSI.
I wasn't too concerned because I had the trusty WI kicking in above 10 PSI.
02-13-04, 08:25 AM
#11
I won't let go
1000th post for me....yea...
Anyway, I was set to 15 PSI on the stock twins. I'd regularly hit 97% when getting on it. I agree that you're playing a risky game when you only have a 3% margin for error, but if you're tuned right, and everything's mechanically sound, I don't know why it would be THAT big of an issue. Every car is obviously different. Just because I could doesn't mean that you can. It's trial and error. Tune to 10, 12 or whatever PSI. If you have room to play and want to go higher, then go higher.
My .02
My .02
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