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Generation III Internal Engine 1997-2006 LS1 | LS6
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Stock Injectors Enough?

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Old 12-18-2007, 03:29 AM
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Default Stock Injectors Enough?
Would I need bigger injectors on a 98 with a 228/230 cam and a set of AFR 205's with FAST 90?
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Old 12-18-2007, 03:35 AM
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your stock injectors should be good for the 450's and up a lil...might want to upgrade the fuel pump tho
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Old 12-18-2007, 04:39 AM
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228/230, can we say VRx4!?

As for the injectors, its always good to run the calculator, and if I recall the 98's in stock form had the lowest "rated" injectors.
Last edited by BlackScreaminMachine; 12-18-2007 at 06:18 AM.
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Old 12-18-2007, 06:08 AM
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Only way to tell is datalog via live monitoring.
Best way to increase or maintain injector capacity is having an adjustable fuel pressure regulator. Only after that can you make the decision to change or not.
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Old 12-18-2007, 09:16 AM
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I think the 98 had the 28.8 injectors like the 01-02. You have a considerable amount of money tied up in that setup, I'd go ahead and upgrade to at least the SVO red-tops. Just my 2 cents worth tho.
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Old 12-18-2007, 10:55 AM
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Well I guess just another reason not to wait for a tune. I imagine, a tune with A/F will help identify the answer.
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Old 12-18-2007, 10:58 AM
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Get the SVO 30lbs
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Old 12-18-2007, 11:20 AM
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i say 107-112% duty cycle at WOT. U will need to change them.
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Old 12-18-2007, 11:49 AM
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98'a had the highest rated injectors, not the lowest

98- 28lbs
99+ -26lbs
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Old 12-18-2007, 11:54 AM
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When I did my swap, I put in a set of SVO red top 30lbs. Since the fuel pressure is higher on the camaro, they end up being in the 36lb range.
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Old 12-18-2007, 11:56 AM
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With just my cam, I was at 115%+ IDC, not good. You should get atleast the SVO red tops.
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Old 12-18-2007, 06:59 PM
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Originally Posted by lsheaven
98'a had the highest rated injectors, not the lowest

98- 28lbs
99+ -26lbs
Not true- 01 and 02's had the 28's, Never heard that the 98's had them as well.

I am at 97% duty right now and you would be over my power, so you would definatly need to change them out.
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Old 12-19-2007, 05:39 AM
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Default fff
98's did have the larged injectors along with the larger cam.f
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Old 12-19-2007, 10:51 AM
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Man, I was 95% with just bolt-ons, though I have a 2000 with the slightly smaller injectors.
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Old 12-19-2007, 11:47 AM
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Originally Posted by seawolf18
When I did my swap, I put in a set of SVO red top 30lbs. Since the fuel pressure is higher on the camaro, they end up being in the 36lb range.
+1

Better to be safe than sorry.

I'm running the red tops with my current stroker combo and all is well.
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Old 12-19-2007, 12:37 PM
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like said befor at least get the 30# ford red tops
flow matched if you can afford them
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Old 12-21-2007, 05:48 PM
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better to be safe then sorry. id go with the svo red tops
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