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Discussion Starter #1
ok, so i have an 87 16v scirocco with a 9A block and some other mods as seen in sig and i have a question about fuel injectors. i've been running the stock PL injectors which i assume are #0 437 502 045. but mine are leaking so today i picked up some from a 9A passat which are # 0 437 502 043 and are specified for Motronic. so can i still use these in my car? does anyone know what the difference is? they look identical and i usually thought motronic had a separate electrical connection at each injector but i guess not.
so any info much appreciated.


Modified by superloaf at 6:22 PM 4-18-2010
 

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The only difference really is the thread pitch on the injector where the fuel line screws on.
Virtual World carries both styles, and also used to carry a threaded adapter pieces you would need to run motronic injectors with non-motronic fuel lines.
You can see the difference on his website:
cis non-motronic

motronic




Modified by -camber at 9:15 PM 4-18-2010
 

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Discussion Starter #3
thanks, camber.
do you know if they flow the same? just wondering why they changed the threads.
 

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From what I've read, all CIS injectors flow the same...even the Mercedes injectors when compared to VW.
The flow rate is pretty much controlled by the metering plate size/shape and the fuel dizzy.
 

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Discussion Starter #5
also, i read somewhere that the impedance was different between them.
and can't find any adapters unless you happen to know the size/type of threads they both have?
 

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Impedence??...these are mechanical injectors, not electronic.
Give Mike a call re: the adaptors....not sure if he stocks them still but he might have a lead.
 

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Discussion Starter #7
Re: (-camber)

Quote, originally posted by -camber »
Impedence??...these are mechanical injectors, not electronic.
Give Mike a call re: the adaptors....not sure if he stocks them still but he might have a lead.

yeah, i know. i was thinking that after posting but thought maybe they were thinking impedance in the flow through them.
do you know if i get the Motronic fuel lines, can just i use them and connect them to my fuel distro?
 

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Yeah, you can use motronic lines but they are lengthed/bent for passenger side fuel distributors so they might look sloppy.
 
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