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Old 06-16-2019, 08:23 PM   #1
race24x
 
Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS
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Replaced Injectors and driveability questions

So I am taking my car to get it tuned. First I put a smaller pulley on my supercharger. I was going to drive it there and it seemed fine I just would stay out of the boost. I had to upgrade the injectors also. Now that I replaced my 550cc Grams injectors with 850cc Fuel Injector Clinic injectors. I have not changed any tuning. It runs rough driveability is not great and it starts hard. I assume this is to be expected from changing the injectors right? I guess part of me assumed that it would drive the same until the new tune took advantage of the bigger injectors, but again I assume this is an issue because they are different brands and larger injectors? Any help to make sure driving it easy 100 miles to the tuner would be appreciated. Again staying out of the boost and running it as close to 1500 RPMs as possible
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Old 06-17-2019, 07:56 AM   #2
Morgan.13
 
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Iím in the same boat kinda but Iím just trying to get mine on the trailer haha. Most likely putting my old ones back in and driving it on the trailer and then swapping them out real quick on the trailer


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Old 06-17-2019, 08:09 AM   #3
NoDak1LE
 
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Changing injectors you need a tune, I would highly recommend you not drive it that distance. Put your old injectors back in and have your tuner swap them when he gets the car. You could do serious damage even without being in boost.
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Old 06-17-2019, 08:12 AM   #4
xc_SS/RS


 
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The computer still thinks the stock injectors are installed. So it's likely shooting too much fuel into the cylinders. I'd put the stock ones in and drive like grandma to your tuner
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Old 06-17-2019, 09:34 AM   #5
ChibiBlackSheep

 
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Quote:
Originally Posted by race24x View Post
So I am taking my car to get it tuned. First I put a smaller pulley on my supercharger. I was going to drive it there and it seemed fine I just would stay out of the boost. I had to upgrade the injectors also. Now that I replaced my 550cc Grams injectors with 850cc Fuel Injector Clinic injectors. I have not changed any tuning. It runs rough driveability is not great and it starts hard. I assume this is to be expected from changing the injectors right? I guess part of me assumed that it would drive the same until the new tune took advantage of the bigger injectors, but again I assume this is an issue because they are different brands and larger injectors? Any help to make sure driving it easy 100 miles to the tuner would be appreciated. Again staying out of the boost and running it as close to 1500 RPMs as possible
It all works with percentages, and multipliers. You changed the main number, but the multipliers are still in play.

I agree with everyone else, put the stock ones in, and let your tuner swap them.
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Old 06-17-2019, 12:18 PM   #6
race24x
 
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I am getting pretty good at replacing injectors. Took 20 minutes of my lunch and put the other ones back in. They are not stock, but I am sure the tune is specific for the 550cc ones and not the new 850cc ones. I should be able to drive it out of the boost now to the tuner and put the new injectors in outside in the driveway LOL. I have all of my tools in a bucket pretty much 8mm 10mm a screwdriver and some oil... THank you everyone that posted.
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