#42lb injectors, no tune..how will car run?
04-01-2004, 02:10 PM
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#42lb injectors, no tune..how will car run? I want to start the car (mid blower install) to check for rubbing/clearance issues....How will the car run untuned with 42lb injectors? What should I be expecting?
Thanks,
Mike
Thanks,
Mike
04-01-2004, 02:58 PM
#2
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simple answer... it wont 
I put FMS 42lb injectors in my heads/cam (at the time) car last year... had the stock tune (26lb injectors) and car would start but wouldn't idle... and it wouldn't rev past like 2k ... just dumps WAY too much fuel in... so I'd imagine it'd be the same w/a blown application (PCM is going to see xxx amount of air coming in, so it will hold the injectors open for the appropriate time if they were 28lb injectors... which will dump way too much fuel in)
I corrected it in about 30 mins w/some LS1 Edit updates but w/out tuning the car isn't going to go very far w/those huge injectors in...
I put FMS 42lb injectors in my heads/cam (at the time) car last year... had the stock tune (26lb injectors) and car would start but wouldn't idle... and it wouldn't rev past like 2k ... just dumps WAY too much fuel in... so I'd imagine it'd be the same w/a blown application (PCM is going to see xxx amount of air coming in, so it will hold the injectors open for the appropriate time if they were 28lb injectors... which will dump way too much fuel in)
I corrected it in about 30 mins w/some LS1 Edit updates but w/out tuning the car isn't going to go very far w/those huge injectors in...
04-01-2004, 06:02 PM
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How about the fact that if you do run it untuned, you WILL dump fuel into the cylinder and most likely wash the cylinder walls! Just a thought, I would find some way to program for them, or replace them to test for rubbing and other things. It seems liek only a minute, but, we all know once we hear how that baby idles, and so on, we let it run longer, and every second we are dumping fuel, running it past the rings, and around the cylinder, before we know it, the oil burning begins... Go back and read the old JPR thread... the smoking issue from having injectors not tuned and how it washed the cylinder. Not something I would do man.
Good luck.
Charlie
thread in ref: major problems with JPR 388 from a few months ago, talks about washing on the 1st page and continues.
Good luck.
Charlie
thread in ref: major problems with JPR 388 from a few months ago, talks about washing on the 1st page and continues.
Last edited by CAT3; 04-01-2004 at 07:04 PM.
04-01-2004, 07:29 PM
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Originally Posted by CAT3
How about the fact that if you do run it untuned, you WILL dump fuel into the cylinder and most likely wash the cylinder walls! Just a thought, I would find some way to program for them, or replace them to test for rubbing and other things. It seems liek only a minute, but, we all know once we hear how that baby idles, and so on, we let it run longer, and every second we are dumping fuel, running it past the rings, and around the cylinder, before we know it, the oil burning begins... Go back and read the old JPR thread... the smoking issue from having injectors not tuned and how it washed the cylinder. Not something I would do man.
Good luck.
Charlie
thread in ref: major problems with JPR 388 from a few months ago, talks about washing on the 1st page and continues.
Good luck.
Charlie
thread in ref: major problems with JPR 388 from a few months ago, talks about washing on the 1st page and continues.
good call, I have an acquaintance with ls1edit, I wonder if he'd mind coming over and doing a few adjustments, so that it would be safe to drive.
Thanks for the advice!
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04-01-2004, 08:28 PM
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Originally Posted by BlackBootyZ71
good call, I have an acquaintance with ls1edit, I wonder if he'd mind coming over and doing a few adjustments, so that it would be safe to drive.
Thanks for the advice!
Thanks for the advice!
sorry to rain on your parade...but if your vin isnt on his cable then you cant do any adjustments
04-01-2004, 08:41 PM
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Originally Posted by SC-MECHAM-WS6
sorry to rain on your parade...but if your vin isnt on his cable then you cant do any adjustments
04-01-2004, 09:08 PM
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Originally Posted by slow
why not put your stock injectors back on, and swap at the shop?
just stay under 3K and out of boost and you should be fine.
Ryan
just stay under 3K and out of boost and you should be fine.
Ryan
