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Replacing obsolete fuel injectors

Old 07-19-2011, 11:58 AM
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Originally Posted by hallj
Your fuel pumps are from a Porsche 930, able to support over 500bhp.

The mercury diagnostic box for your engine is pn 91-11001A2 it was also used on the EFI outboards of the same vintage.


Jeff
Oh man that is awesome. I thought I was going to have to replace the port fuel pump, and I might have to replace the starboard one. I was trying to figure out the replacement and I had no idea what to look for. After I read this, I looked at the fuel pump online for a 1991 Porcshe and yup, it's identical. If I have to replace that starboard pump for some reason, can I just use this same fuel pump? Are they any different for marine applications? Doesn't seem like it would be, but I don't know.

This forum totally rocks.
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Old 07-19-2011, 12:26 PM
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Call Linder Tech in Indy they are the injector guru's and will be able to get you a set of injectors no problem. 888-809-3835 http://www.lindertech.com/index.html
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Old 07-19-2011, 01:01 PM
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Originally Posted by MikeyFIN
I.e. the regular Bosch Injector design II pintle type at @ 24lbs/hr flow.
Used by many makes.. Ford Motorsport for the 5.0 Mustang GT usually are the cheapest.
http://www.justfuelinjectors.com/ser...flowchart/Page
Okay I got the part number. Yes, these are the pintle type. The site you linked to shows them to be 20.35 lb/hr. I found another site that said they were 23 lb/hr, but the one you linked to looks more reputable.

The exact OEM Bosch replacement is pretty damn expensive, at around $140/each. But now that I have the stats, I can find something that matches I think.
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Old 07-19-2011, 01:24 PM
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Can I replace the pintle type with a four hole type? Does the lb/hr have to match the original exactly, or can I change a little? What about the PSI rating? There are other much more affordable injectors that Bosch makes that are similar, but not exactly the same. Most are the four hole type.
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Old 07-19-2011, 02:18 PM
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Originally Posted by JMS322
Call Linder Tech in Indy they are the injector guru's and will be able to get you a set of injectors no problem. 888-809-3835 http://www.lindertech.com/index.html
Thanks for the tip. Called those guys and you're right, they know pretty much everything there is to know. They're either gonna hook me up with a cheaper replacement or just recondition the ones I have.
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Old 07-20-2011, 09:02 AM
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Originally Posted by svonmiller
Oh man that is awesome. I thought I was going to have to replace the port fuel pump, and I might have to replace the starboard one. I was trying to figure out the replacement and I had no idea what to look for. After I read this, I looked at the fuel pump online for a 1991 Porcshe and yup, it's identical. If I have to replace that starboard pump for some reason, can I just use this same fuel pump? Are they any different for marine applications? Doesn't seem like it would be, but I don't know.

This forum totally rocks.
You can use the car pump. Pn ending in 979 I think?
I've seen these used on F1 engine dynos and injector test benches as well.
I run one on my Donzi.

Jeff
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