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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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 Posted: Fri Feb 03, 2006 8:51 am Post subject: 85-litre tank..? Methinks not! |
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Well, I ran out of fuel this morning!
I normally run my car for a few hundred kliks before filling up... say, half-empty.
This time I figured I'd run it a little longer and see how far she'd get. Now I know... 530km's. I've been a little heavier on the throttle lately, so it might run closer to 600km's on a highway cruise.
I've been checking my fuel economy and she's been running anywhere between about 22 and 25mpg (~9.5 - 10.5 litres/100km's). So she's spot-on there.
Anyways, I've definitely not got an 85-litre tank! I can't remember the two tank sizes but it certainly isn't the big one.
My question is, can anyone confirm whether all Australian-delivered 924 Turbos came with the larger tank? Is it likely mine has been swapped out for a smaller one?
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'80 924 Turbo |
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john h
Joined: 06 Nov 2002
Posts: 827
Location: Wellington New Zealand
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| Posted: Fri Feb 03, 2006 10:16 am Post subject: |
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It might have been swapped out with a Non Turbo tank. Fairly easy to check by sticking your head under the car. The turbo tank fills up the area around the back of the gearbox, whereas if you've a non turbo tankl (like my GT has at the moment) there's a large gap between the back of the gearbox and the front of the tank
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Remember a Porsche is not just for Christmas,
if you take it to pieces slowly it can provide anguish all year long! |
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Smoothie
Joined: 01 Jan 2003
Posts: 8032
Location: DE (the one near MD, PA, NJ)
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| Posted: Fri Feb 03, 2006 10:31 am Post subject: |
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924(NA) - "approx. 62 liters, of which 5 liters reserve"
924 turbo - "approx. 84 liters, of which 9 liters reserve"
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"..it's made in Germany. You know the Germans always make good stuff."
'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox |
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Andrew NZ
Joined: 22 Jun 2004
Posts: 744
Location: New Zealand
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| Posted: Fri Feb 03, 2006 10:32 am Post subject: Re: 85-litre tank..? Methinks not! |
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| Khal wrote: | | I've been checking my fuel economy and she's been running anywhere between about 22 and 25mpg (~9.5 - 10.5 litres/100km's). So she's spot-on there. |
Well, there's one advantage with turbo charging the NA then - mine gets 28mpg 
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Andrew
1977 RX924 race car
12a bridgeport supercharged
www.race4-dcup.co.nz |
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sequential
Joined: 18 Nov 2005
Posts: 500
Location: BANNED
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| Posted: Fri Feb 03, 2006 11:27 am Post subject: Re: 85-litre tank..? Methinks not! |
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| Andrew NZ wrote: | | Khal wrote: | | I've been checking my fuel economy and she's been running anywhere between about 22 and 25mpg (~9.5 - 10.5 litres/100km's). So she's spot-on there. |
Well, there's one advantage with turbo charging the NA then - mine gets 28mpg |
Andrew if you are getting 28 mpg you are not driving fast enough mate .
Pick the pace up and remember life begins at 15 psi.
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928 gts prototype
baby blue engine block
steam in 1,2,3,4 sometimes
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112 whp with new 4 valve head and MIS 2 |
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Andrew NZ
Joined: 22 Jun 2004
Posts: 744
Location: New Zealand
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| Posted: Fri Feb 03, 2006 1:32 pm Post subject: Re: 85-litre tank..? Methinks not! |
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| sequential wrote: | Andrew if you are getting 28 mpg you are not driving fast enough mate .
Pick the pace up and remember life begins at 15 psi. |
Don't worry, that's around town not in competition!!
Unfortunately I think my engines life would end at 15psi 
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Andrew
1977 RX924 race car
12a bridgeport supercharged
www.race4-dcup.co.nz |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Fri Feb 03, 2006 3:57 pm Post subject: |
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| Smoothie wrote: | 924(NA) - "approx. 62 liters, of which 5 liters reserve"
924 turbo - "approx. 84 liters, of which 9 liters reserve" |
Thanks Smoothie. It's in the Owners Manual I have but I just didn't have it on me and couldn't remember the sizes.
| john h wrote: | | It might have been swapped out with a Non Turbo tank. Fairly easy to check by sticking your head under the car. The turbo tank fills up the area around the back of the gearbox, whereas if you've a non turbo tankl (like my GT has at the moment) there's a large gap between the back of the gearbox and the front of the tank |
Thanks john h, I'll check it out but I don't think there's any doubt I've got the smaller tank!
Anyone know the size of the 944 tank? Are they the same as either the NA 924 or 924 Turbo tank? (i.e. is it just bolt-in?)
Possible it's been swapped for a 944 tank?
Don't really care either way. Just wondering is all...
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cleethorpes
Joined: 26 Jan 2004
Posts: 186
Location: cleethorpes (oddly enough!)
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| Posted: Sat May 19, 2007 8:02 am Post subject: |
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(44 tank isn't a straight swap. You'll really have to deform your spare wheel well to get one of those heavy buggers in....as I discovered, you would be better off replacing with a light alloy version in my uneducated opinion.....as I am about to do.....also dependent on model possibly, the 944 tank does not have an integral fuel pump(well not the one I got anyway)
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'24 turbo with dodgy gt bodykit......needs a new home |
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Thu Jun 14, 2007 8:27 am Post subject: Re: 85-litre tank..? Methinks not! |
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| Andrew NZ wrote: | | Khal wrote: | | I've been checking my fuel economy and she's been running anywhere between about 22 and 25mpg (~9.5 - 10.5 litres/100km's). So she's spot-on there. |
Well, there's one advantage with turbo charging the NA then - mine gets 28mpg :wink: |
What size gallons are you guys using?
I've worked out that my NA gets around 20 mpg, but that's with a 3.79 litre gallon. That works out to around 24 mpg if you use the UK gallon, which is 4.55 litres in size. Either way it's a fair bit worse than what you're getting. It looks like Khal was using the US gallon size for his mileage, and I should be getting better than that.
This article makes it sound as though 20 mpg for a NA is about right. What's up?
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78 924 NA
5-lug |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Thu Jun 14, 2007 12:08 pm Post subject: |
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It should get 25+ on the highway fairly easily. . .the drag coefficient of the 24 is uber low. . .
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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twt
Joined: 19 Dec 2002
Posts: 20
Location: Singapore
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| Posted: Thu Jun 14, 2007 12:59 pm Post subject: |
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I have the ROW 924 turbo and I'm sure that my fuel tank is only ~62litres as I normally top up ~50L when the reserve light comes on. They must have different tanks for different regions.
I've also experienced running out of petrol... hope you weren't too far from civilization! I learnt that day not to test how far you can go while on a date!  |
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Fri Jun 15, 2007 5:19 am Post subject: |
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| Rasta Monsta wrote: | | It should get 25+ on the highway fairly easily. . .the drag coefficient of the 24 is uber low. . . |
It's the most slippery car I've driven, but the best mileage I can get on my commute is around 28 mpg with a beater 1.4 litre Hyundai Pony. That's a 5 speed as well, while the '78 twofer has the Audi 4 speed.
I like to think I drive in a fuel efficient manner, but my calculations encompass my entire commute, which involves at least a dozen red lights, and about 75% of the distance with a speed limit of 80 - 90 km/h (that's 50 - 55 mph), and a distance of around 35 km each way (or around 20 miles each way).
So, is my mileage this poor because I'm running rich, or is there something else going on (like driving conditions)?
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78 924 NA
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Fri Jun 15, 2007 5:50 am Post subject: |
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Is your exhaust tip sooty? It's probably worth checking your control pressure. . .I'm sure someone up in Vancouver has a CIS tester you can use.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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!tom
Joined: 28 Aug 2006
Posts: 1941
Location: Victoria, BC Canada
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| Posted: Fri Jun 15, 2007 11:30 am Post subject: |
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Yep, definately sooty. I figure it's better to run on the rich side than the lean side though.
I've been wanting to check the pressures (before touching the mixture of course) for a while, but haven't gotten a pressure tester or anything like that yet. At over a hundred bucks for a round trip off this rock (via the ferry, not fairy!), meeting up with Min or Lizard in Vancouver (or maybe even Kendog) just for a pressure check is kind of pricey.
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78 924 NA
5-lug |
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Neil924
Joined: 18 Mar 2003
Posts: 4225
Location: Canada
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| Posted: Sat Jun 07, 2008 9:05 am Post subject: |
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| Rasta Monsta wrote: | | It should get 25+ on the highway fairly easily. . .the drag coefficient of the 24 is uber low. . . |
My coefficient is much higher I would imagine. |
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