Fuel Injectors

[richarde]

I realise that much has been written about the best injectors for the LT5's. Many comments suggest that the FIC injectors are really good, also Accel injectors.
Has anyone any experience of South Bay injectors in their LT5? I ask that as their injectors seem to be around 40% of the cost of FIC - when shipping internationally, this price difference can have a massive effect! Although South Bay advertise their 1990 - 1992 LT5 injectors as suitable for our engines (also ethanol tolerant), their resistances check out at around 14.8 ohms (at 70 degrees F) compared to the OEM of around 12.1 to 12.5.
Your comments would be appreciated.


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[Jcsws6]

I recently installed them in one of my 91s. I was impressed with the quality and so far, the performance. They are factory bosch injectors from early 00s ford v8s. South Bay does a great job of remanufacturing them and modifying them for use the lt5. I plan to install another set shortly.

[Matt B]

Amazing price indeed for all 16... having the same issue with shipping and taxes these might be a good alternative IF they do what they should and how they should.

[XfireZ51]

I realise that much has been written about the best injectors for the LT5's. Many comments suggest that the FIC injectors are really good, also Accel injectors.
Has anyone any experience of South Bay injectors in their LT5? I ask that as their injectors seem to be around 40% of the cost of FIC - when shipping internationally, this price difference can have a massive effect! Although South Bay advertise their 1990 - 1992 LT5 injectors as suitable for our engines (also ethanol tolerant), their resistances check out at around 14.8 ohms (at 70 degrees F) compared to the OEM of around 12.1 to 12.5.
Your comments would be appreciated.




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The idea is to make certain that injectors all have similar resistance, ie within a certain +/-. The way to truly establish if there is a defective injector is to warm up motor to operating temps, then check after a 30min heat soak. Resistance will be higher then, but ur checking for consistency across the 16 injectors.
Finally, for tuning purposes, you would really need to get the Injector Voltage Offset from SouthBay and incorporate that into the calibration if it varies from the stock values, which is likely.

[richarde]

Thanks for the feedback. I have just taken delivery of the South Bay fuel injectors and have carried out a quick check using the Kent Moore J39021 Injector Tester. The stock OEM injectors for the 1990 LT5 shows a 'coil test amp supply' of 0.5A, with a 'voltage window' of 5.7 to 6.6. With the Injector Tester set at 0.5A, my stock injectors averaged out at 5.87 to 6.15, all within the 'voltage window' of 5.7 to 6.6. The resistances at 60 degrees F measured at between 12.1 and 12.4 ohms.
Applying the same test criteria to the South Bay injectors, the 'voltage window' came out at between 7.1 and 7.2 volts with the resistance at between 14.8 and 14.9 ohms for all 16 injectors.
I emailed South Bay with my findings asking for comments. They came straight back to me saying that these were OK and the injectors will work as they should. This prompted me to ask the forum for any comments from people who have used these injectors. The only slight concern that I have, which may be unfounded, is the potential for damage to other components as the injectors do not exactly match OE specs. Initial checks showed that they are all within a tight window on resistances, albeit at 60 degrees F.


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[Ccmano]

I recently installed them in one of my 91s. I was impressed with the quality and so far, the performance. They are factory bosch injectors from early 00s ford v8s. South Bay does a great job of remanufacturing them and modifying them for use the lt5. I plan to install another set shortly.

I had set of those running in my ZR-1 when I purchased it. Mine were the orange top Bosch/Ford injectors. The car ran perfectly fine and I had no issues with them.

I later switched to a set of JerrysGaskets FIC balanced injectors. I really only did that because I got a killer deal from a fellow member.

I would have no problem using the Southbay orange tops again.
H
:cheers:

[richarde]

Yes, these are orange top Bosch / Ford injectors. Thanks for your input - I plan to install them on Monday!


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[Matt B]

I had set of those running in my ZR-1 when I purchased it. Mine were the orange top Bosch/Ford injectors. The car ran perfectly fine and I had no issues with them.

I later switched to a set of JerrysGaskets FIC balanced injectors. I really only did that because I got a killer deal from a fellow member.

I would have no problem using the Southbay orange tops again.
H
:cheers:Was there any noticeable difference?

[Ccmano]

Was there any noticeable difference?

I can't say I really noticed a difference. Idle is where it should be most noticeable. I changed out the entire engine around that time so I wasn't really paying attention to that at the time.
H
:cheers:

[-=Jeff=-]

I am running Bosch III's from South Bay on my ZR-1.. installed late int he season last year. so far so good..

[XfireZ51]

I recently installed them in one of my 91s. I was impressed with the quality and so far, the performance. They are factory bosch injectors from early 00s ford v8s. South Bay does a great job of remanufacturing them and modifying them for use the lt5. I plan to install another set shortly.

Are these Bosch 3s? If so, what does South Bay do to have them compatible w 90-92 Injector housings?

[Mystic ZR-1]

Short of ultrasonically cleaning and checking electrical resistance, what else can be done to "rebuild" injectors?

[-=Jeff=-]

Are these Bosch 3s? If so, what does South Bay do to have them compatible w 90-92 Injector housings?

I bet they are still the stock fat body. when I bought mine I was the only one that asked for them specifically

[Jcsws6]

Are these Bosch 3s? If so, what does South Bay do to have them compatible w 90-92 Injector housings?

Decaped they are physically the same as the originals. There are some old threads on how to do it with the accell injectors.

[Jcsws6]

Short of ultrasonically cleaning and checking electrical resistance, what else can be done to "rebuild" injectors?
Replacing the consumable parts including the filter, then flowing them for spec and variance. If all this is good, it should be key on fun for a long time!

[XfireZ51]

Decaped they are physically the same as the originals. There are some old threads on how to do it with the accell injectors.

So sounds like NO They?re Not. When I had the FICs flow tested and reconfigured the pairing of them, it was necessary to modify a few of the injectors to make them compatible to fit in the secondary vs primary position. Basically same as Accel as far as grinding down a locking tab.

[Jcsws6]

So sounds like NO They?re Not. When I had the FICs flow tested and reconfigured the pairing of them, it was necessary to modify a few of the injectors to make them compatible to fit in the secondary vs primary position. Basically same as Accel as far as grinding down a locking tab.

Correct, they are not Bosch 3. I don?t see why they couldn?t work though. I?ve ran both styles in my ls stuff with no issues. Decapped and the tab removed on the connector is all that?s modified for the secondaries.

[Corvette95]

I had used a set of the Southbay injectors years ago, I did a bench test on them and one of them new out of the box was bad...leaked after shut down. I understand the price point if you need to go that way but the FIC's from Jerry's are the way to go if you plan on keeping the car long term (forever in my case) plus Jerry has almost single handed kept LT5 parts available to us all. With customer service the way it is (almost every store/company etc hassle to get help and zero customer support) I gladly pay Jerry any extra over lower priced parts from bulk suppliers for his service (not that his parts are higher than others) but his service and support is money well spent. Same as with some other vendors here on the registry...could go on and on about their products and services, but dealing with registry folks is like buying local , it helps the entire community.

[CamP]

32 year old stock injectors are still in my car. Surprisingly, they still perform well. That said, I have a set of new FIC from Jerry that will be installed with a new stroker engine that's in the works.

https://youtube.com/shorts/PQbKc6b52Kk?feature=share

[Paul Workman]

Decaped they are physically the same as the originals. There are some old threads on how to do it with the accell injectors.

Far as the Accel (150821) 21# injectors go, they have a little plastic indexing nub on them which if not first removed makes it so the they cannot be used in (I believe) the secondary holes. When I installed mine, it took only a few seconds with a Dremel to grind that plastic nub off so it the wire connection could be made.

I believe those Accels have been in there for 8 years now and have worked w/o any problems so far!

That said, if I were to replace them, I would go with the FICs thru Jerry's Gaskets. That way I would be sure they were flow matched and Jerry would match them up with the plenum gaskets, etc. needed for the installation.:thumbsup:

[Matt B]

Does Jerry still have FIC? I recently browsed his site and couldn't find them...

[A26B]

Look for the small picture on the home landing page, click on the link below the thimbnail photo, OR locate the "Fuel System" Category on the left side of the page, click & browse until they show up.

However, here's the direct link :-)
https://www.jerrysgaskets.com/fuel-injector-set-16-90-95-13b2/

[Matt B]

Thanks, Jerry. Not sure what I did wrong - I tried multiple ways but all failed. So, thanks for the link!

P.s. I just checked again and immediately found them. Probably a matter of a lack of beer, hahaha. Sorry for the confusion

[viper107]

I just ordered a set from Jerry,will I need injector o rings or do they come with them,it's for a 93 to 95 z

[A26B]

Here you go....

Product Description
Fuel Injector Set of 16, Primary & Secondary for 90~95 ZR-1, LT5. Sold by the complete set of 16. All injectors are identical for both primary and secondary.

For 90~92 models: Viton o-ring seals for Primary Injector-upper and Secondary Injector upper & lower are included with the injectors. The Primary Injector-lower seal is NOT included. Order separately from our store at the following link, Seal Set, Fuel Injector, Lower Primary VITON 90~92 [11D8]

For 93~95 models: All Viton o-ring seals are included.

Injectors by FUEL INJECTION CONNECTION

[viper107]

Thankyou