LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Stock tune big injectors

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Old 03-17-2011, 03:03 PM
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Default Stock tune big injectors

Can you run a stock PCM with 30# injectors? would it learn enough to run fine for a short time until I get a tune? No hard runs or anything
Old 03-17-2011, 03:30 PM
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I wouldn't do it, your going to be really rich.
Old 03-17-2011, 03:36 PM
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Originally Posted by ByProxy
Can you run a stock PCM with 30# injectors? would it learn enough to run fine for a short time until I get a tune? No hard runs or anything
Not a good idea. You will wash the walls with gas and run PIG PIG rich. Get it tuned first or park it until you do. Made that mistake when I first built my motor over 11 years ago and diluted the hell outta the oil. Thought I had more gas then oil in there when I drained the oil pan. When you dilute the oil by washing the cyl walls with gas you run the risk of damaging the bearings and also the piston rings.
Old 03-17-2011, 11:58 PM
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I've seen people say you can because the ltfts can compensate. it would only be like four days. Guess i better get a tune
Old 03-18-2011, 01:53 AM
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Yep get the tune or you will run the risk of damaging the motor. Why did you decide to go with the 30lb injectors?
Old 03-18-2011, 08:18 AM
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I changed mine on the dyno then tuned... It only takes about 30 minutes!
Old 03-18-2011, 08:36 AM
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i did it for 6 months without issue.
Old 03-18-2011, 09:10 AM
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Originally Posted by joshh123
i did it for 6 months without issue.
Doesn't mean it was a good idea, nor did your motor any good. Get it tuned and don't risk any damage to the motor.
Old 03-18-2011, 10:33 AM
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Gas is not a lubricant



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