02-17-2022 | #1 |
Join Date: Sep 2012
Location: United Kingdom
Posts: 68
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Fuel Injectors
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. Sent from my iPad using ZR-1 Net Registry
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Richard 1990, numbers 1821 and 2391 1821 - owned since Nov 2002, charcoal / Gray, Stainless headers, B&B system, 4.10's 2391 - owned since Jan 2019, Black / Black, have completed restoration. Jeal headers, Corsa system, 4.10's, Aluminum flywheel with Carolina clutch. |
02-17-2022 | #2 |
Join Date: May 2021
Location: Freeburg IL
Posts: 45
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Re: Fuel Injectors
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.
Last edited by Jcsws6; 02-17-2022 at 06:55 PM. |
02-19-2022 | #3 |
Join Date: Jan 2021
Location: Beautiful Bavaria
Posts: 523
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Re: Fuel Injectors
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.
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ZR-1 #638/1991 |
02-19-2022 | #4 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,698
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Re: Fuel Injectors
Quote:
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.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX Last edited by XfireZ51; 02-19-2022 at 09:55 AM. |
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02-19-2022 | #5 |
Join Date: Sep 2012
Location: United Kingdom
Posts: 68
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Re: Fuel Injectors
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. Sent from my iPad using ZR-1 Net Registry
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Richard 1990, numbers 1821 and 2391 1821 - owned since Nov 2002, charcoal / Gray, Stainless headers, B&B system, 4.10's 2391 - owned since Jan 2019, Black / Black, have completed restoration. Jeal headers, Corsa system, 4.10's, Aluminum flywheel with Carolina clutch. |
02-19-2022 | #6 | |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Fuel Injectors
Quote:
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
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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02-19-2022 | #7 |
Join Date: Sep 2012
Location: United Kingdom
Posts: 68
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Re: Fuel Injectors
Yes, these are orange top Bosch / Ford injectors. Thanks for your input - I plan to install them on Monday!
Sent from my iPad using ZR-1 Net Registry
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Richard 1990, numbers 1821 and 2391 1821 - owned since Nov 2002, charcoal / Gray, Stainless headers, B&B system, 4.10's 2391 - owned since Jan 2019, Black / Black, have completed restoration. Jeal headers, Corsa system, 4.10's, Aluminum flywheel with Carolina clutch. |
02-19-2022 | #8 | |
Join Date: Jan 2021
Location: Beautiful Bavaria
Posts: 523
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Re: Fuel Injectors
Quote:
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ZR-1 #638/1991 |
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02-20-2022 | #9 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Fuel Injectors
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
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
02-20-2022 | #10 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,155
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Re: Fuel Injectors
I am running Bosch III's from South Bay on my ZR-1.. installed late int he season last year. so far so good..
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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