Replaced Injectors and driveability questions - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

race24x · 06-16-2019, 08:23 PM

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

Morgan.13 · 06-17-2019, 07:56 AM

I’m in the same boat kinda but I’m 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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NoDakZ/28 · 06-17-2019, 08:09 AM

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.

xc_SS/RS · 06-17-2019, 08:12 AM

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

ChibiBlackSheep · 06-17-2019, 09:34 AM

Quote:

Originally Posted by race24x

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.

race24x · 06-17-2019, 12:18 PM

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.

06-16-2019, 08:23 PM	#1
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 387	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

06-17-2019, 08:09 AM	#3
NoDakZ/28 Drives: 2014 Z/28 CTF Join Date: Sep 2017 Location: North Dakota Posts: 623 View My Garage	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. __________________ 2014 1LE - Sold 2014 Z/28 #99008 CTF SIM

06-17-2019, 08:12 AM	#4
xc_SS/RS Drives: 2010 Camaro SS/RS Join Date: Mar 2014 Location: somewhere in MD Posts: 4,884	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 __________________ 2010 2SS/RS Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53

06-17-2019, 07:56 AM	#2
Morgan.13 Drives: 2011 camaro 1ss Join Date: Jul 2017 Location: Wisconsin Posts: 92	I’m in the same boat kinda but I’m 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 Sent from my iPhone using Tapatalk

06-17-2019, 12:18 PM	#6
race24x Drives: 80 Z28 - 93 Z28 - 14 Camaro SS-RS Join Date: Sep 2016 Location: Fayette Maine Posts: 387	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.