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What happens when injectors pass 100%?

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Old 10-15-2012, 06:22 PM
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With how nicely behaved injectors are these days there is no reason besides cost to not going bigger than you think you will need to begin with.
Old 10-15-2012, 06:33 PM
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Imma join in here... I'm running 83# injectors at ls pressure and iv hit 90% at 12 psi and 5900 rpm shifts. When I put my new big turbo on I know I'm going to add a good bit of fuel in the VE table. So Im sure its going to go well over 100% should I worry too much as long as afr stays in check? Running do10 and 14 meth nozzles currently.
Old 10-15-2012, 06:38 PM
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I have a gauge for that
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depends how you want to use the meth....for iat control or as another fuel source...

If you want to use it as a fuel source you can take the flow rate of your nozzles, convert to lbs per hour for the percentage of methanol you are using, then divide that number by 8 and add it to your injectors and that will be your "total fuel amount"
Old 10-15-2012, 06:44 PM
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Originally Posted by BlackGMC
Man i was thinking about ordering the 72s, why are you going so big? Basically our setups will be similar
Lots o boost needs big ole squiters.

Skinnyman is runnin my old 73# injectors and he is maxed out on 15.5 psi.

Ill be seeing 15psi so i need some big injectors.

How much boost you plan on runnin?
Old 10-15-2012, 06:54 PM
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Anyone look into getting factory injectors resized? Theres a guy in Missouri thatll resize, rebuild and flow the stock injectors to any size you need for 230 bucks.
Old 10-15-2012, 07:00 PM
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Honestly i have no idea i am a boost virgin. Probably start out at 7 then 12 then 15.
Old 10-15-2012, 08:12 PM
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Then 20. Then 25. Haha. New motor. Stop at 15 again.
Go big.
Old 10-16-2012, 01:16 PM
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Originally Posted by 2doorfury
Anyone look into getting factory injectors resized? Theres a guy in Missouri thatll resize, rebuild and flow the stock injectors to any size you need for 230 bucks.


interesting... contact info? pm if ya'd like
Old 10-29-2012, 08:20 AM
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i would send the injectors to FIC, they can restack the plates to make them bigger, its around $200 bucks. also when going over 80% the issue is the injectors get hot, they dont have enought time to cool, the injector window is only so big, but you can go way over 100%, ive seen almost 200% on a few cars. they are just staying open longer, which makes heat and they dont have time time to cool. 100% injector duty doesnt mean they are spraying fuel 100% of the time, its 100% of the alocated time window

drag racing wont kill them but is you road raced or something they would cook the driver in the pcm. i personally ran a set at 120% for over 3 years, they only hit that at redline for a short time, then it would shift to the next gear.

hope this helps
Old 10-29-2012, 08:24 AM
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These are Bosch EV14s from FIC.. i gotta send them back when i have time a swap them for the big 95 or 105s.. which ever are the biggest he has for the same money..


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