Need new fuel injectors
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Joined: Aug 2016
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From: Washington
Need new fuel injectors
Been reading about high performance fuel injectors for replacement. What does the pound per hour rating mean? I’m not much of a mechanic and want to purchase the right parts for my 91 stock coupe.
Thanks,
Bernie
Thanks,
Bernie
Team Owner
Joined: Jul 2004
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From: Hartford WI
https://fuelinjectorconnection.com/c...3-injector-set
That is about all you need if you are stock. Bigger won't mean squat at best and at worst, cause problems. At full duty cycle, it will give 24 pounds of fuel in 1 hour, I suspect.
Why don't you tell us what you want to do with the car? Budget?
That is about all you need if you are stock. Bigger won't mean squat at best and at worst, cause problems. At full duty cycle, it will give 24 pounds of fuel in 1 hour, I suspect.
Why don't you tell us what you want to do with the car? Budget?
Racer
Joined: Jul 2015
Posts: 313
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From: Modesto Ca
Do not change the injector size.Best to do business with FIC.He has some good vids up on you tube regarding spray pattern/atomization .Technology has moved along and the newer Bosch type 3 injectors seen to atomize fuel better.You only need to change injector size if you have more hp than stock .Then the ecm will need a reflash.
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Joined: Aug 2016
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From: Washington
The injectors have gone bad and are giving me problems when I am at idle or try to accelerate. I don’t really need to add to the HP of the car and wanted to make sure that I bought the correct parts before I did the project. Looks like major surgery from the videos I saw.
https://fuelinjectorconnection.com/c...3-injector-set
That is about all you need if you are stock. Bigger won't mean squat at best and at worst, cause problems. At full duty cycle, it will give 24 pounds of fuel in 1 hour, I suspect.
Why don't you tell us what you want to do with the car? Budget?
That is about all you need if you are stock. Bigger won't mean squat at best and at worst, cause problems. At full duty cycle, it will give 24 pounds of fuel in 1 hour, I suspect.
Why don't you tell us what you want to do with the car? Budget?
Thread Starter
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Joined: Aug 2016
Posts: 61
Likes: 2
From: Washington
Thanks for the advice. I was planning on buying Accel injectors instead of remanufactured ones.
Do not change the injector size.Best to do business with FIC.He has some good vids up on you tube regarding spray pattern/atomization .Technology has moved along and the newer Bosch type 3 injectors seen to atomize fuel better.You only need to change injector size if you have more hp than stock .Then the ecm will need a reflash.
Team Owner
Joined: Jul 2004
Posts: 28,474
Likes: 3,291
From: Hartford WI
The injectors have gone bad and are giving me problems when I am at idle or try to accelerate. I don’t really need to add to the HP of the car and wanted to make sure that I bought the correct parts before I did the project. Looks like major surgery from the videos I saw.
Team Owner
Joined: Jul 2004
Posts: 28,474
Likes: 3,291
From: Hartford WI
Unless you have a unique injector that they don't have, I'd spring for a set of reman stock size every so often. Costs as much to clean and they do get crudded up. I don't use snake oils to clean so I send mine out every few years.
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Thread Starter
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Joined: Aug 2016
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From: Washington
Good advice. My mechanic told me to stay away from Bosch because their quality has gone down over the years. Is this still the case?
Team Owner
Joined: Jul 2004
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From: Hartford WI
I'm not sure if that is true or not. Check it out with Jon, Witch Hunter, RC Engineering and other places that do fuel Injectors for a living
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From: Washington
Racer
Joined: Oct 2006
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From: Tucson/Santa Paula AZ/CA
2017 C4 of Year Finalist
The correct injectors are 22lB/HR NOT 24lB/Hr, go here:
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
Team Owner
Joined: Jul 2004
Posts: 28,474
Likes: 3,291
From: Hartford WI
The correct injectors are 22lB/HR NOT 24lB/Hr, go here:
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
Thread Starter
Advanced
Joined: Aug 2016
Posts: 61
Likes: 2
From: Washington
Crap. I just ordered a set of 24lb injectors and a fuel pressure regulator from RC Engineering. Is that going to make a big difference in the running of the vehicle?
The correct injectors are 22lB/HR NOT 24lB/Hr, go here:
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
https://fuelinjectorconnection.com/c...2-corvette-tpi
Jon will send you the correct rebuilt Bosch IIIs's for your '91
Mick
Last edited by CGretired; Oct 6, 2017 at 07:29 PM.
Team Owner
Joined: Jul 2004
Posts: 28,474
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From: Hartford WI
Team Owner
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You are speed density. It should not matter for that difference. I ran 24's in mine when pretty much stock. 1990 is also speed density.
Larger causes a problem and map cars will change more things.
I went from stock up to 60lb injectors in my car depending on set up.
Put it this way, a guy here made something like 800hp IIRC on 32lbs, but I think that is really relying on a lot of tuning. Pretty small for my taste at that leve.
Stock is stock and should be fine. Lt1 cars had 24 IIRC.
Larger causes a problem and map cars will change more things.
I went from stock up to 60lb injectors in my car depending on set up.
Put it this way, a guy here made something like 800hp IIRC on 32lbs, but I think that is really relying on a lot of tuning. Pretty small for my taste at that leve.
Stock is stock and should be fine. Lt1 cars had 24 IIRC.
Racer
Joined: Aug 2017
Posts: 435
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From: Ellenton Florida
I just called and asked him what injectors. If running ethanol you may want to go with stainless. I am not using it so went with the rebuilt Bosch. Good idea on the regulator. Anyone have a favorite one they like?