DO NOT UPGRADE YOUR INJECTORS!!!! <-----READ THIS!!! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-03-2004, 08:31 PM   #1
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Default DO NOT UPGRADE YOUR INJECTORS!!!! <-----READ THIS!!!

I kind of ruined a surprise but this was of a bit more importance. First off yes I did get my engine done, I've got about 600miles on it right now and its doing great! I'll get more into that later (video anyone?) but the important thing is that when I was checking everything out I noticed it was running lean.

I wasen't sure where it was comming from but to be sure it wasen't the injectors I pulled them and took them to a very respected local shop, Doctor Injector who is a part of Turbo Technologies here in Washington. I explained my whole story to him and he asked me what rating they were and I said "I think 21 pound." Well I got a call today and they tested out fine. He said "Yep they're performing as perfectly fine 30 pound injectors!" Oh and yes, my injectors are STOCK! Whoa whoa, I rushed down there to talk to him and he showed me the numbers. I'll get a copy of it tomorrow and post it but the stockers are 30 pound for the SSEI! He told me he thinks he remembers NATURALLY ASPIRATED 3.8'* as being 21 pounders. This was too big of news to sit on until I could announce I had a perfectly running engine, I don't want to have anyone else spending their summer money on 26# "downgrades."

Now for the "I'm so stupid!" logic. Its been confirmed by other sites that the supercharged Series II run 36# injectors. Why would they need injectors 15#'* larger for a mere 40HP or so increase? They don't, they only have 6# larger in part because of the increase airflow of the M90.

I know this probably hit people kind of hard, I talked to Will about it before I posted it. He'* researching another issue right now but I'm sure he'll add his 0.02 here shortly. I don't know what else to say...
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Old 08-03-2004, 08:47 PM   #2
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So could this contribute to your problems you've had? Or was that still in the bottom of the motor?

So Series I L67 injectors are rated at 30 lbs?
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Old 08-03-2004, 09:05 PM   #3
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No my bottom end was probably dirt, although it was never confirmed. Either way I can add "new crank" to the list of "mods" My current problem is a lean condition which brought about this bit of info.

Yes the Series I l67 have 30# injectors
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Old 08-03-2004, 09:46 PM   #4
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The Series III L32 (changed from L67) have 32# pound injectors, nice to have a little downgrade . A lot of the '04 GP guys are finding out their injectors go static with relatively few mods.

Cheers
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Old 08-03-2004, 11:05 PM   #5
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That'* what I've discovered lately. Although what I found indicated 28lb/hr.
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Old 08-03-2004, 11:19 PM   #6
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Quote:
Originally Posted by jwikoff99
That'* what I've discovered lately. Although what I found indicated 28lb/hr.
How'd you come to that conclusion? I'll have a copy of the results tomorrow, it'll give us a better idea on how he came to his conclusion.
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Old 08-03-2004, 11:26 PM   #7
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From contact with the guy at GMtuners.com and someone he referred me to that cleans and fixes injectors.
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Old 08-04-2004, 10:06 AM   #8
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Did you consider the ZZP mini afc?
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Old 08-04-2004, 10:35 AM   #9
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Wow, good info!! Thanks, Jay!!
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Old 08-04-2004, 11:00 AM   #10
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Quote:
Originally Posted by 95naSTA
Did you consider the ZZP mini afc?
That won't do anything for you if your fuel injectors are lean at 100% duty cycle.
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