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Old 07-03-2004, 03:59 AM   #1
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Default Rating of stock injectors?

Does anyone know for sure what the lb/hr rating of stock Series I L67'* are? I thought I knew, but I'm working something out right now and need to know.
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Old 07-03-2004, 10:11 AM   #2
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S2 is 36.6 lbs I think not sure if the S1 is anywhere near the same.
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Old 07-04-2004, 04:15 AM   #3
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One source tells me 21, another 28. If it is 28, I've got a problem.
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Old 07-04-2004, 12:36 PM   #4
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y do u have a problem?
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Old 07-04-2004, 12:53 PM   #5
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Quote:
Originally Posted by jwikoff99
One source tells me 21, another 28. If it is 28, I've got a problem.
I believe the L27 is 21, and the Series 1 L67 is 24, but that'* just from memory.
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Old 07-05-2004, 03:48 AM   #6
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Quote:
Originally Posted by Kennginn
y do u have a problem?
Cause I've put on 24'*. Now, with Bill'* recollection, I have three choices.

I tried contacting Pontiac, through their site, but only got some run-around.
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Old 07-07-2004, 03:00 PM   #7
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Alright, the GMtuners guy indicates that he has tested SI SC injectors at 28 lb/hr, and that after looking at a stock 94 chip, which has the same stock injectors as a 92, it has its "fuel constant set at about 28."

So, anybody got some 30 pounders laying around? Any NAers want to upgrade their 21 pounders to 24?
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Old 07-07-2004, 06:09 PM   #8
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They won't benefit you, as your PCM will just operate them at a lower duty cycle to maintain your AFR.

You only need to upgrade if you're beyond the fuel delivery capability because of mods.
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Old 07-07-2004, 07:15 PM   #9
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I may be interested in those injectors... I've got a high flow intake, and i'll put on a larger TB when i get my L67 one from spiral this week. A little headroom will be nice when i get a custom chip...
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Old 07-07-2004, 07:52 PM   #10
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I'm probably getting my stockers sent out for cleaning, new tips, and flow testing. It'll be a few weeks, then the injectors are for sale.

I agree with Bill. Unless you manage to outmod your injectors' capacity, you don't need them. Jason, your project might just need these. They are is great shape. My MPG went up about 4 on the highway, I just go lean in the top end.
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