C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

interchangability question

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Old Feb 13, 2012 | 11:20 AM
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Default interchangability question

do c4 and c5 cars use the same type of injectors? could i use aftermarket injectors that were previously on a c5 for my 90?
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Old Feb 13, 2012 | 12:11 PM
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From the factory they are not the same type of injector although you can use LS style injectors in older engines. You would certainly want to make sure that they are sized properly.

Stock for stock they are different size injectors (flow rate for a given pressure) and if memory serves LS series engines ran at a higher pressure too. It can be done but you might be opening a can of worms. If you're looking for a stock replacement, I would look somewhere else. If you're looking for a performance injector to support other mods and you have the ability to tune for them, they are probably a good choice.
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Old Feb 13, 2012 | 12:38 PM
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there is a set of siemens 60lbs i was looking at, but they came off a c5, so i just wanted to check
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Old Feb 13, 2012 | 04:22 PM
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Contact Jon at Fuel Injector Connection. He's a Supporting Vendor and will be able to answer your questions.

What sort of mods do you have that require 60 lb injectors? Blower, NOS or ??? The stock L98 Multecs were something like 22 lb

Injector height is another concern. FIC has Bosch III injectors they offer that are the same height as the OEM Multec's.
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