injector sizing
Feb 4, 2008 | 06:31 PM
#2
the non-flex fuels for the 4.8,-6.0 are 23 or 24 lb/hour. Or somewhere close to that, and the non-flexfuel 8.1s are 32 lb/hour. The 8.1 are a direct swap for the stock injectors in the 4.8-6.0 motors.
That answer your question?
That answer your question?
Feb 4, 2008 | 07:23 PM
#5
on the AC Delco site they do list an extra part that may be a pig tail, but from what I've been told they should swap directly in. Either way, they're a cheap easy mod especially when you pick up a whole set for less then 25 bux 
Feb 4, 2008 | 07:56 PM
#6
EDIT:
Ok, I also went and looked at a bunch of other stock tune, just cuz there always seems to be a bit of confusion as to what all these injectors are rated at and this is what I found according to my stock tune files as viewed with EFILive. 4.8,5.3, and 6 after 99 are 25lbs/hr. 99's are 22lbs/hr. Flex fuel as stated are 33lbs/hr. 8.1 truck injectors are 30lbs/hr.
Any one can show other wise, I'm all ears
Last edited by kbracing96; Feb 4, 2008 at 08:11 PM.
Feb 4, 2008 | 10:27 PM
#7
i guess that's the extra p/n listed on the ACDelco site? What did you have to modify to swap them in? I'm sure the pigtail on the acdelco site would adapt it, no reason for them to change the wiring harness completely just for a different injector.
I'm trying to find the bookmark from earlier that showed them rated at 37, I need to organize some
I'm trying to find the bookmark from earlier that showed them rated at 37, I need to organize some
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Feb 5, 2008 | 01:04 PM
#8
I put a 5.3 out of a flex fuel truck in my dads 72 Chevy with a turbo. The connectors are defiantly different. I left the stock injectors in it just to see if they would be enough. So far at 5 psi I'm only seeing about 80% DC on them. I looked at 3 different stock FF tunes and all 3 of them listed 33lbs/hr in the injector flow rate tables.