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Will I need new Injectors?

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Old 03-07-2008, 02:37 PM
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Originally Posted by mdenz3
O.P. I would highly recomend new injectors for you with the 503 cam. FYI, stock GTP injectors flow about 33.5lbs at stock LT1 fuel pressure and can be had for about $5 each on GTP forums.


And to think I was about to spend $200 on a new set. Thank you.
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Old 03-07-2008, 05:31 PM
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Is there a particular year GP I should be looking for?
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Old 03-08-2008, 07:40 AM
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Originally Posted by Counted Out
Is there a particular year GP I should be looking for?
I'm looking to replace my stock injectors as well, this sounds like a really cost effective idea. Does anyone have more info on this? Are many people out there using GTP injectors?
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Old 03-08-2008, 07:43 AM
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Originally Posted by Counted Out
Is there a particular year GP I should be looking for?
I would imagine only the supercharged series had the bigger injectors, the N/A models would not need the extra fuel delivery. Also, the supercharged 3.8 Series II engine was in more then just the Grand Prix, it was also in the Regal,Riviera,and Bonneville platforms as well.
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Old 03-08-2008, 04:44 PM
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Originally Posted by Counted Out


And to think I was about to spend $200 on a new set. Thank you.


Where from? That's cheap as hell!
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Old 03-08-2008, 05:10 PM
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Originally Posted by marshall93z
Where from? That's cheap as hell!
Whoooooppsss. Typo. $300*
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Old 03-10-2008, 12:36 PM
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Gotcha!
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Old 03-10-2008, 12:47 PM
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Yeah, but you will have to find at least 2 GTP engines to get enough injectors.
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Old 03-10-2008, 06:26 PM
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lol
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Old 03-11-2008, 08:50 AM
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So can anyone confirm the GTP injectors flow rate as that? I will jump on those if that's the case.
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Old 03-12-2008, 09:02 AM
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I am curious about injectors as well. I am still running the stock ones and I am curious if larger injectors would be needed or worth while.
I have an LT1 in my 89 Camaro. I am running the hotcam, 1.6 RR, headers, catless exhaust, LT4 KM, 160 thermostat, and a basic tune (not dynotuned).
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Old 03-12-2008, 10:51 AM
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Originally Posted by Fish89
I am curious about injectors as well. I am still running the stock ones and I am curious if larger injectors would be needed or worth while.
I have an LT1 in my 89 Camaro. I am running the hotcam, 1.6 RR, headers, catless exhaust, LT4 KM, 160 thermostat, and a basic tune (not dynotuned).
For those mods, the stock injectors should be up to the task.
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Old 07-17-2008, 08:11 PM
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Anyone look further into GTP injectors? I found a place that has some from $50-$150 of varying years....of course, you'd have to buy extra, as already stated.

Originally Posted by Counted Out


And to think I was about to spend $200 on a new set. Thank you.
$200 is still a bargain from what I've seen.
Last edited by MarcR94v6; 07-17-2008 at 08:13 PM.
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Old 07-18-2008, 01:52 PM
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He meant $300.
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Old 07-18-2008, 04:22 PM
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If your going to buy a injector buy something from Racetronix, they are it for fuel upgrade products.
They make a 32lb and a 37lb. Both will handle your needs.
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