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Fuel Injector Differences????

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Old 09-26-2008, 02:20 PM
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Fuel Injector Differences????


I had 3 cracked injectors so I bought a slightly used set. The injector on the left is what I pulled off the 86 305 TPI motor. Part# 5235047. The one on the right is the ones I bought, Part# 5235301. They are both Rochester, and are both for 305 TPI's. My question is will they work? The one on the right is around a 1/4" longer. I would hate to have bought the wrong injectors. Any info is MUCH appreciated. Thanks.-James

Last edited by IROCtheThird; 09-26-2008 at 10:40 PM.
Old 09-26-2008, 03:38 PM
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Re: Fuel Injector Differences????

Check this website out: http://fuelinjectorconnection.com/shop/index.php

I just bought my set for my 1989 305 TPI. Call them if you need help and talk to John. Ask him for a set take the BOSCH III . He is making them for our cars so no modification is needed. He has great prices and a 3 year Warrantee. His price is the best I found. Look it up on this site TGO everyone has had good things to say about FIC.

Thanks
Billy

Last edited by FUNIROC; 09-26-2008 at 06:25 PM.
Old 09-26-2008, 05:47 PM
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Re: Fuel Injector Differences????

1. Your link doesn't work.
2. I would definately not use those injectors if they are 1/4 inch too long. Get the right ones from FIC.
Old 09-26-2008, 06:21 PM
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Re: Fuel Injector Differences????

Here just go to this site. fuelinjectorconnection.com

I dont know why the link did not work for you.
Here is the phone number as well. 770-888-1662

Thanks
Billy
Old 09-26-2008, 08:14 PM
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Re: Fuel Injector Differences????

great guy with plenty of advice. just put my bosch 3's in today. and work great.
Old 09-26-2008, 10:42 PM
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Re: Fuel Injector Differences????

I dont have the money, thats why I had to go used. They are both 305 TPI injectors. When I looked them up, the ones I had said 85 which is weird since my motors an 86, the ones I bought said 87-89. I am going to put them in the port and see if they sit in all the way, thats really all I'm concerned with.
Old 09-26-2008, 11:58 PM
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Re: Fuel Injector Differences????

Originally Posted by IrocZ30589
I dont have the money, thats why I had to go used. They are both 305 TPI injectors. When I looked them up, the ones I had said 85 which is weird since my motors an 86, the ones I bought said 87-89. I am going to put them in the port and see if they sit in all the way, thats really all I'm concerned with.
fyi THE INJECTOR THAT IS LONGER WILL FIT. THE O RING TO ORING LENGTH IS THE SAME. HOWEVER I'VE ONLY SEEN THE LONGER 1 ON A L98 1985 AND IS A 24LB INJECTOR. TO MUCH FOR A 305. IN 85 THE VETTE HAD 36 PSI RAIL PRESSURE NOT 43.5 LIKE YOUR CAR. DO YOU HAVE THE PART # I THINK YOU ARE WASTEING YOUR TIME DOING ALL THAT WORK TO PUT SOME USED TOO BIG INJECTORS IN, CALL JON AT FIC. HE CAN SELL YOU WHAT YOU NEED AT A GOOD PRICE. YOU WILL WASTE MORE FUEL THAN THE COST OF THE INJECTOR

Last edited by irocuroc; 09-27-2008 at 12:08 AM.
Old 09-27-2008, 03:13 AM
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Re: Fuel Injector Differences????

I would buy the Bosch III from Jon at Fuel Injector Conection anyday, I got them in my car and it runs like never before, Ive tested 4 types of injectors / brands and Bosch III are the best, never got better idle and throttle response.

He takes 169,95 for a set of 8 22lbs injectors, that are flowmatched and have a great spraypattern. So I would fix some money and buy his set, he leaves 3 years warranty on them to.

So call Jon up and he will help you out.
Old 09-27-2008, 06:37 AM
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Re: Fuel Injector Differences????

I understand the short on money. The part number 5235301 is a AC injector for a 87-88 305 TPI. Just hope they are good. I would still Call JOHN at FIC and ask him if you can get a filter for them and how to change them out. If they are 20+ years old they should be cleaned at least before reinstall and use. Do you know if they are good?

Last edited by FUNIROC; 09-27-2008 at 11:53 AM.
Old 09-27-2008, 08:28 AM
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Re: Fuel Injector Differences????

Originally Posted by irocuroc
fyi THE INJECTOR THAT IS LONGER WILL FIT. THE O RING TO ORING LENGTH IS THE SAME. HOWEVER I'VE ONLY SEEN THE LONGER 1 ON A L98 1985 AND IS A 24LB INJECTOR. TO MUCH FOR A 305. IN 85 THE VETTE HAD 36 PSI RAIL PRESSURE NOT 43.5 LIKE YOUR CAR. DO YOU HAVE THE PART # I THINK YOU ARE WASTEING YOUR TIME DOING ALL THAT WORK TO PUT SOME USED TOO BIG INJECTORS IN, CALL JON AT FIC. HE CAN SELL YOU WHAT YOU NEED AT A GOOD PRICE. YOU WILL WASTE MORE FUEL THAN THE COST OF THE INJECTOR
When I looked up the part# it said it was for a 305, the part number is in my first post, 5235301. They are both Rochester 305 injectors, I was just concerned with the length, but I went outside this morning and they fit fine. FUNIROC, I was planning on having them cleaned, and yes they are good. To everyone it doesnt look like there will be a problem, as I say we will find out, but thanks for the info, a couple months down the road I will probably pick up a new set, but for now I need to put the car back on the road before winter ruins my fun.
Old 09-27-2008, 06:42 PM
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Re: Fuel Injector Differences????

Originally Posted by IrocZ30589
When I looked up the part# it said it was for a 305, the part number is in my first post, 5235301. They are both Rochester 305 injectors, I was just concerned with the length, but I went outside this morning and they fit fine. FUNIROC, I was planning on having them cleaned, and yes they are good. To everyone it doesnt look like there will be a problem, as I say we will find out, but thanks for the info, a couple months down the road I will probably pick up a new set, but for now I need to put the car back on the road before winter ruins my fun.
yea you are right they are 305 but for a 85 the 85 ran fuel pressure of 36psi not 43.5.. here are the specs of that injector.

5235301
20.5lbs/hr
215.5cc/m
3 bar

so you are ok.. at 36 they will flow about 19.. i thought the funnel tips were only on vettes. learn something everyday
Old 09-27-2008, 08:01 PM
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Re: Fuel Injector Differences????

I would save some money and buy the Bosch III from FIC instead of putting in used injectors (if they arent cleaned and done the right way..) its 169,95 for REALLY good injectors, with 3 years warranty.. but thats just my 2 cents..
Old 09-27-2008, 08:39 PM
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Re: Fuel Injector Differences????

yeah i did this swap on my 86 IROC and it makes a big differance. keep up the good work.
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