924Board.org

[bruce76-924]

Hi guys,

I noticed in a few old posts that the question of fitting 944 plastic fuel tanks to 924s has cropped up more than once. Yes you can fit them, I've just fitted one to my '79 931 this weekend and I fitted one to my old 81 924 a few years back.

You do need to replace the crossmember with the late 944 bolt in crossmember and if you have a 924 then you have to make up new mounting plates for the trans mounts. If you have a 931 then as the transmission isn't mounted on the crossmember then it is easier. If you ae going to use the 944 tank, then get the tank, sender unit, cossmember and straps from the breakers yard together. As a guide I just paid £50 (UK) for my parts and spent all Sunday afternoon fitting it all.

If anyone needs more detailed info let me know. Oh yes great site, really can't believe I've been playing with 924s for all these yeas and never stumbled on you all before!

Cheers Bruce.
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1976 924 LHD, full cage, semi tube chassis, 951 brakes, lightweight 951 body panels.
1.8t engine conversion with Holset turbo and 6 speed Audi gearbox.

[steeny]

1976 924 LHD, Garrett turbo, 8 injectors, water injection, multiple intercoolers, 931 trans, 951 brakes, lightweight 951 body panels.


that sounds like fun.........
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1978 924 N/A
she's gone.....

[moone924]

Not to hijack but I'm going top be putting a 924S plastic tank on my 931 as soon as the lift in the shop is free. So I'm curious too...
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Ryan Moone

Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time.

[Peter_in_AU]

Bruce, any more detail you could give would be great. I bet there's a lot of guys, including me, who would be interested.
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1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)

Learn to love your multimeter and may the search be with you

[Min]

[arx]

FYI the 944 plastic tank is actually heavier than steel one. But of course -its also bigger and no rust problems anymore. Fitting is rather easy as bruce mentioned if you figure out ho to mount the transmission.

[morghen]

heck ~80 Liters is enough for me...tho i have a spare 944S tank.
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Supercharger and EFI kits
https://www.the924.com

[bruce76-924]

Fitting the tank is pretty straightforward..........depends on which vehicle/transmission you have though.

On my 931 the gearbox isn't mounted on the crossmember and being a "snail shell" type box then the tank can even be removed with the trans in situ. The standard 924 and 924S need the trans removing first though. The original crossmember will need removing as it is welded in, then you can either weld in captive nuts or just drill through the chassis rail from the boot/trunk and then bolt the new crossmember in.

The plastic tanks are also bolted through the center, so I drilled 2 holes through the boot floor and used 10mm threaded bar to bolt the tank up. Using a combination of 944 and original tank support straps then the tank can be supported from underneath as well. The fuel pump will sit under the tank in the 944 pump shield which is also bolted to the retaining straps. The fuel gauge will need the 944 electrical connector splicing in to the loom and although the gauge will work it will read different as the new tank is obviously larger - the yellow warning lamp functions accurately still.

If your transmission was mounted on the crossmember then you need to weld in 2 flat mounting plates with captive nuts in for your trans mounts to bolt up to, this is also the best time to mount the accumulators if used. that's it really, exhaust back up, trans back in, drop the car back of the axle stands and fill up with fuel. No more rusty tank problems! I'll try to get some pics of the 931 this weekend and somewhere I still have the pics and templates of the crossmember modifications needed for the standard 924.

Failing that, if you're in the UK near Yorkshire I'll give you a hand with it, just drop me an email.

Cheers Bruce.
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1976 924 LHD, full cage, semi tube chassis, 951 brakes, lightweight 951 body panels.
1.8t engine conversion with Holset turbo and 6 speed Audi gearbox.

[bruce76-924]

[Chrenan]

[Rasta Monsta]

[Min]

[morghen]

[steeny]

i thought at 32psi these things would become a smouldering mess of scrap?

anyway, i third the vote for pics. too often we hear about pie in the sky dreams of such a setup, not often enough anyone has the balls or skills to got hrough with it.
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1978 924 N/A
she's gone.....

[bruce76-924]

"wow, ok now I need way better info, pistons? head? rods? what kind of exhaust? what kind of intake? more details on the water injection? ... do you have headstuds? how are you keeping the head down at 32 psi???? I think we're going to need pictures..... Sounds like a awesome little project."

I'll spec out the car in full detail later on, but engine wise here goes......

1976 2.0 litre block and head ( head drilled and tapped to take screw in cis injectors), VW LT van pistons to bring the compression down, home made adjustable cam sprocket, custom ground camshaft, fully balanced crank and flywheel assembly, AP racing custom clutch assembly, Audi 100 exhaust manifold turned upside down so that the Garett turbo can be mounted high up on the front of the engine, twin CIS fuel distributors running 8 injectors, 9th injector manually operated for cold start, 2 radiators and 2 water pumps and far too much pipework!

Since you all asked it spurred me on to clear the garage out and drag the car outside this afternoon ( it's been hibernating in bits for the last 4 years) in order to take some pics. I'll ty to get them posted later on this evening but I guess I should stick them on the performance side the forum.

Cheers for showing a bit of interest in it, Bruce.
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1976 924 LHD, full cage, semi tube chassis, 951 brakes, lightweight 951 body panels.
1.8t engine conversion with Holset turbo and 6 speed Audi gearbox.