injector questions
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
injector questions
first off i have read many places that the 85 corvettes had 24# injectors but have also read that only early 85's had the 24# injectors, so which is right?
if anyone knows how to decode the factory numbers they are:
80150945 and F1SE-E5
and the second part of my question is what is the deal on the bosch III 4 hole injectors that are used in the fords, i have a set and i want to use them but have some fears reading that some are shorter. also i see there are a couple styles of the 4hole injectors (one looks stock and other looks skinny and plastic) i am refering to the skinny type.
i know all im probably going to hear is buy them from jon at fic but i already have these and i dont really see any differance in his they look the same, whats the modification?
please give me the answers as i can think of few things worse then to have a suprise leaking of injecto seals into hot engone bay
if anyone knows how to decode the factory numbers they are:
80150945 and F1SE-E5
and the second part of my question is what is the deal on the bosch III 4 hole injectors that are used in the fords, i have a set and i want to use them but have some fears reading that some are shorter. also i see there are a couple styles of the 4hole injectors (one looks stock and other looks skinny and plastic) i am refering to the skinny type.
i know all im probably going to hear is buy them from jon at fic but i already have these and i dont really see any differance in his they look the same, whats the modification?
please give me the answers as i can think of few things worse then to have a suprise leaking of injecto seals into hot engone bay
Last edited by ladystoy69; Jul 17, 2013 at 06:16 PM.
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
Call Jon. He probably can decode that stuff for you. That or we can guess all day long unless someone knows it off the top of their head.
Those that Jon sells are tested. If yours are new, fine. If they are off something or other, it could be clogged, dirty or whatever.
Those that Jon sells are tested. If yours are new, fine. If they are off something or other, it could be clogged, dirty or whatever.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
good point but ya i got them from a buddy that had them in his mustang for probably not even 5 hours of testing so i,m betting there not too dirty, mine lasted about 28years so i would hope they would survive 5 hours lol 
if not maybe i should just stick with some type II's 
also mine are new with only 5 hours on them not just cleaned with who knows how much time on them, does Jon also sell new ones or just the used ones?
if not maybe i should just stick with some type II's also mine are new with only 5 hours on them not just cleaned with who knows how much time on them, does Jon also sell new ones or just the used ones?
Last edited by ladystoy69; Jul 18, 2013 at 02:30 PM.
Pro
Joined: Oct 2012
Posts: 648
Likes: 6
From: weems va
Jon is a great guy to deal with.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
good point but ya i got them from a buddy that had them in his mustang for probably not even 5 hours of testing so i,m betting there not too dirty, mine lasted about 28years so i would hope they would survive 5 hours lol if not maybe i should just stick with some type II's
if not maybe i should just stick with some type II's http://www.witchhunter.com/flowdatapix/b0280150945.jpg
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
i believe those are the type 2 style i mentioned yes although i have seen some that look just like those but are the 4 hole designtoo, but the type III i was refering to was these..
or these from Jon @ fic
so far from the reading i have done on using stock unmodded type 3's instead of ones from Jon is that stock type III's are shorter so if there not modded with the adapter then you have to run a second o-ring on the bottom, is this correct? anyone go that route? if so how did it work out? safe? also i wonder what size o-ring (just same as the standerd normally used o-ring groove takes?
or these from Jon @ fic
so far from the reading i have done on using stock unmodded type 3's instead of ones from Jon is that stock type III's are shorter so if there not modded with the adapter then you have to run a second o-ring on the bottom, is this correct? anyone go that route? if so how did it work out? safe? also i wonder what size o-ring (just same as the standerd normally used o-ring groove takes?
Last edited by ladystoy69; Jul 18, 2013 at 02:28 PM.
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
I have the ones in the top pic. I used a steak knife to cut a groove for the stock retaining clips and had no problems like that. When i switched to a miniram, I left the clips off, again, no problems. you may need to tweak fuel pressure, the 24# rating depends on what the FP is. I should run fine but you can datalog to see if its too rich. I am now running the red 30# Bosch IIIs but I used the 24s for years with no problems.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
I have the ones in the top pic. I used a steak knife to cut a groove for the stock retaining clips and had no problems like that. When i switched to a miniram, I left the clips off, again, no problems. you may need to tweak fuel pressure, the 24# rating depends on what the FP is. I should run fine but you can datalog to see if its too rich. I am now running the red 30# Bosch IIIs but I used the 24s for years with no problems.
30 pounders? what year and engine is your car? i have a new set of 30# red tops setting here too for a 383 hsr build but figured they would be way outta spec's for the 85
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Race Director
Joined: Sep 2003
Posts: 16,838
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From: Database Error Indiana
Its an 87. I dont have a big motor, just a ZZ4 basically. You could use the 30s but it would take some tuning. I got them because the 24s were maxed out on duty cycle when I was running E85. If you are familiar with tuning, no problem. I'd have to look at some bins to see what it took when I went back to premium gas.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
Its an 87. I dont have a big motor, just a ZZ4 basically. You could use the 30s but it would take some tuning. I got them because the 24s were maxed out on duty cycle when I was running E85. If you are familiar with tuning, no problem. I'd have to look at some bins to see what it took when I went back to premium gas.
do you think the 4 hole type III's are worth it to bother upgrading to or not really a notable diff?
Race Director
Joined: Sep 2003
Posts: 16,838
Likes: 341
From: Database Error Indiana
I cant say if they are better. I can say, I used E85 for 3+ years, no problem. I used the the 24s for at least 3 years also with no problems. The 24s actually got the job done running E85 but I felt running 75# FP and 100% DC at WOT might create a problem.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
The FIC injectors are 280-155-715 and flow right at 24.3 lbs. They would make a great replacement for your 85.
http://www.witchhunter.com/flowdatapix/b0280155715.jpg
http://www.witchhunter.com/flowdatapix/b0280155715.jpg
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
The FIC injectors are 280-155-715 and flow right at 24.3 lbs. They would make a great replacement for your 85.
http://www.witchhunter.com/flowdatapix/b0280155715.jpg
http://www.witchhunter.com/flowdatapix/b0280155715.jpg
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
I not so sure that the FIC Bosch III's are used. I know he remanufactures them. But he is just taking a cheaper injector and replacing the original seals with newer, better material that is not destroyed by alcohol then matches sets. I just put a set in my 96' LT-1 and it runs great. The injectors look new to me and Jon backs them for three years. But if you want to spend more money that's up to you.
Last edited by Klyde; Jul 19, 2013 at 06:12 PM.
Burning Brakes
Joined: Feb 2002
Posts: 1,232
Likes: 28
From: South Riding VA
so far from the reading i have done on using stock unmodded type 3's instead of ones from Jon is that stock type III's are shorter so if there not modded with the adapter then you have to run a second o-ring on the bottom, is this correct? anyone go that route? if so how did it work out? safe? also i wonder what size o-ring (just same as the standerd normally used o-ring groove takes?
Last edited by mxw128; Jul 19, 2013 at 07:01 PM. Reason: add picture
Pro
Joined: Mar 2013
Posts: 628
Likes: 13
From: Indiana
The upper of the two lower o-rings is just to stop the injector from being pushed to far into the manifold. It is not used as a seal but just to set the correct deck height for the fuel rail. Without it the forty pounds of fuel pressure in the fuel rail pushes the injector so far into the manifold that the upper rail seal is exposed and may leak.
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 849
Likes: 1
From: dubuque iowa
yes the yellows are the 22#, blues 24#, reds 30# and so on just like the old ford ones i belive.
whonder what the o-ring sizes he is running on those is, i know i have read that the bosch III's are a bit smaller diameter then the old style so i read they use an o-ring that is bosche III size inside and gm size outside but that doesnt really tell alot and what size is the second o-ring. think Jon would tell me the sizes if i got ahold of him? or does he frequent this site?
thanks for the info though ..
The upper of the two lower o-rings is just to stop the injector from being pushed to far into the manifold. It is not used as a seal but just to set the correct deck height for the fuel rail. Without it the forty pounds of fuel pressure in the fuel rail pushes the injector so far into the manifold that the upper rail seal is exposed and may leak.
Last edited by ladystoy69; Jul 20, 2013 at 12:35 AM.
Safety Car
Joined: Aug 2009
Posts: 3,752
Likes: 276
From: Melbourne, Victoria, Australia
first off i have read many places that the 85 corvettes had 24# injectors but have also read that only early 85's had the 24# injectors, so which is right?
if anyone knows how to decode the factory numbers they are:
80150945 and F1SE-E5
and the second part of my question is what is the deal on the bosch III 4 hole injectors that are used in the fords, i have a set and i want to use them but have some fears reading that some are shorter. also i see there are a couple styles of the 4hole injectors (one looks stock and other looks skinny and plastic) i am refering to the skinny type.
i know all im probably going to hear is buy them from jon at fic but i already have these and i dont really see any differance in his they look the same, whats the modification?
please give me the answers as i can think of few things worse then to have a suprise leaking of injecto seals into hot engone bay
if anyone knows how to decode the factory numbers they are:
80150945 and F1SE-E5
and the second part of my question is what is the deal on the bosch III 4 hole injectors that are used in the fords, i have a set and i want to use them but have some fears reading that some are shorter. also i see there are a couple styles of the 4hole injectors (one looks stock and other looks skinny and plastic) i am refering to the skinny type.
i know all im probably going to hear is buy them from jon at fic but i already have these and i dont really see any differance in his they look the same, whats the modification?
please give me the answers as i can think of few things worse then to have a suprise leaking of injecto seals into hot engone bay
Remember to use the two o rings on the bottom of the injectors, i found that out after fitting new bosch 111 injectors.
Cranked her over she started but there was fuel squirting from the top of a couple of the injectors in the fuel rail. The old multecs have a large diameter body that prevents the injectors being pushed too far into the manifold injector holes. the bosch 111 injectors are a little shorter also.