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Re: Injector Sizing
[Re: Mopar_Rich]
#890957
12/29/10 12:11 PM
12/29/10 12:11 PM
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Joined: Mar 2006
Posts: 49 Borden, Indiana, U.S.A.
wrenchinrandy
OP
member
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OP
member
Joined: Mar 2006
Posts: 49
Borden, Indiana, U.S.A.
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I had done the calculations earlier and knew that the 96's would be sufficient. However the 120's are pretty much the same cost and would leave me with injector to spare in case I decided to turn up the boost or build a larger motor in the future. I am confident the 120's would idle acceptably well. That said, the discussion I recall was talking about the operation at light load/part throttle. Would the 120's be on the ragged edge under those conditions? The 96's would have a surplus capacity with the current setup, just not as much. For what it is worth I really don't have any plans for higher boost or a bigger motor right now. I just have a tendency to try and overbuild everything. I guess I know I am guilty of the usual hot rodder mentality, if a little is good, then more is better, and too much is never enough. The 120's meet that need. That said, I don't need any extra capacity that reduces the daily operational effectiveness.
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Re: Injector Sizing
[Re: wrenchinrandy]
#890958
12/29/10 01:11 PM
12/29/10 01:11 PM
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Joined: Nov 2006
Posts: 2,265 IL
furious70
top fuel
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top fuel
Joined: Nov 2006
Posts: 2,265
IL
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Used 96er's should hold their value pretty well if you would need to upgrade in the future, a point to consider.
70 Sport Fury 68 Charger 69 Coronet 72 RR
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Re: Injector Sizing
[Re: wrenchinrandy]
#890959
12/29/10 04:42 PM
12/29/10 04:42 PM
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Joined: Jan 2003
Posts: 28,096 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,096
Irving, TX
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I was running 120s in the hot rod. It idles around 0.9 ms on time and can see on times as low as .85 ms under cruise. That's barely cracking the injector open. It can be done but be prepared for very low pulse widths for cruising under vacuum.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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