924Board.org

[toolbox1211]

So I have a 1980 924 turbo. The previous owner drained the fuel tank before it was parked in 2000. Point being, I have a tested and fully functional clean origional in tank fuel pump.

I know the pump is often replaced with the screen from the 944.

So my questions are.

Is there any reason to run the in rank fuel pump?

I see the price for the pump is a lot. I assume due to availability and not because people want it?

My thought was to go with the screen and sell the pump for a good price to someone who needed it to help fund my 931 project. Is the pump even somthing people want?
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1980 924 turbo m471

[chuck21401]

I don’t think the pump is needed. I’m running a single pump and 944 screen in my 931. I bought my car in 2019 and it was like that when I bought it.

From time to time I’ve seen people looking for the in tank pump; a good one is worth something.
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1981 Porsche 931 w/S1 engine & euro g31 transaxle. Water-cooled intercooler

[morghen]

I always gut them or change to the 944/928 filter.
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Supercharger and EFI kits
https://www.the924.com

[Beartooth]

Mine was trashed when I got it, and I eliminated it without any issues so far as I can tell. The consensus is it's not necessary, but they wouldn't have included it, especially in a lower-price sports car like the 924 if there was no reason for it. I suspect you'd have to crack a fuel line to prime the pump if you ran it out of gas (especially if you were only able to put a couple gallons of gas in); I've done that the couple times I emptied the tank to work on it. I've seen speculation that it make a difference when you're running low on gas; not sure if it's a matter of fuel pressure transients, hard on the main pump, or maybe a mix of the two. The counterpoint to that is that cars like my Mercedes have no in-tank pump. The pump(s) are below the gas tank, but I'd think it's effectively the same if you have more than a couple gallons in the tank of a too-for.

If I had a good one, I'd prefer to run it, but at the price being asked for a new (or even used) one, I'm not buying one unless I come up with a really good reason. I have no idea why replacements are so expensive: even for a Porsche part, it seems excessive, especially when you consider that there's no way there's more than $100 in component cost to build one. If I ever decide there's a good reason to have it, I think I'd find a way to adapt a universal in-tank pump, like this https://deatschwerks.com/products/9-110-1055, rather than spending big money on the "correct" pump.
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1980 931 diamond in the rough

[toolbox1211]

you all have been very helpful, thank you. I will buy the pickup screen for a backup and run the pump until it fails
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1980 924 turbo m471

[Elektrobank]

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