924Board.org

juno · Posted: Wed Aug 11, 2004 10:51 pm Post subject: Most powerful 931?

So who's got the most powerful 931?
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1980 924 Turbo RHD. 3" > 2.5" Stainless straight-through exhaust.

Robert Hooper · Joined: 15 Mar 2004 Posts: 70 Location: Christchurch NZ

The person with the most money

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1982 924 Race Car
1981 931 Road Car

J1NX3D · Joined: 06 Feb 2003 Posts: 1333 Location: New Zealand

Hi Rob,
I'll be in Chch this time next month, not sure if my car will be there too at that stage but it would be good to catch up!
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'86 944

Lizard · Posted: Thu Aug 12, 2004 4:33 pm Post subject:

there isnt anyone with any realy dyno # 931, however the CGT came factory with 210 bhp, it has 8.5:1 cr, with a top mounter IC and 12 PSI of boost,

Kenodog and I have done some work to his car and once he has his IC installed and has cranked the boost then he plans on dynoing it.
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3 928s,

numbbers · Posted: Fri Aug 13, 2004 11:13 am Post subject:

Well guys, I have been running 17 PSI of boost for years, and based on my calculations, I believe that I am running about 230HP. The car is still not a screamer, even at 2700 pounds, you need to get in the 400HP range to get real performance.
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1980 924 Turbo

AGD931 · Joined: 17 Mar 2003 Posts: 289 Location: Athens, Greece

Mine is the slowest... Absolutely no mods, totally stock.

Arthur
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1981 931 S2
1990 E30 320i Cabrio
1979 Ford Capri Ghia

juno · Posted: Fri Aug 20, 2004 9:03 pm Post subject:

Alex Roy · Posted: Fri Aug 20, 2004 11:58 pm Post subject:

I think mine is the slowest......it just sits in wait for body parts/paint in my drive way. If I didn't mind driving a car that was primer gray, it'd be driven all the time.

numbbers · Posted: Sat Aug 21, 2004 10:23 am Post subject:

Yah, I am in the bodywork mode right now. I am in the middle of striping and painting the hood. But, I am still driving, because I bought a hood off of Ebay. So, I can take my time with it, while the one on the car is still presentable enough for daily driving.
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1980 924 Turbo

Khal · Posted: Mon Aug 23, 2004 12:53 pm Post subject:

Well, I was told by the PO that mine makes a touch over 200hp -actually he quoted 205hp but let's not get too pedantic. I've never had it dyno'd so I can confirm in writing... but I have driven a bog-stock '80 Turbo (in good condition) and I can feel the power difference in mine.

Obviously numbbers has got it over me

It seems from various conversations here that these engines are not able to produce huge horsepower. But the PO of mine, a bloke definitely NOT prone to exaggeration, reckoned you could quite easily get 250 - 270hp from them?! Now, I'm no mechanic, and I'm certainly not taking what he said as Gospel. And I'm pretty sure they're never gonna get up in the 500hp range. But it doesn't seem to me that anyone posting here has actually tried getting one of these to make bulk horsepower. Engine swaps don't count.

A distinct lack of responses in this thread, for example...
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'80 924 Turbo

79turbo · Joined: 16 Aug 2004 Posts: 22

well mine is still the fastest in Iceland (i think)
240hp+ according to ex owner
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1979 porsche 924 turbo (euro)

emoore924 · Joined: 13 Apr 2004 Posts: 2822

I have a dyno day coming up in Nov. My time is limited but I am planning on varying a few things between pulls like boost, water spray on the IC and timing. I am expecting around 200 RWHP but a bit more will be great.

I'll try and remember to post results so we are working with facts rather than speculation. If nothing else, there will be a baseline.

Robert Hooper · Joined: 15 Mar 2004 Posts: 70 Location: Christchurch NZ

Come on team, if the factory could get 300+ hp out of the thing using old technology, then why cant we,

A new turbo relocated to the other side of the engine, new intak and exash systems, fully fuel injected, must yield some good horse power,

I belive we are all a bit defetest on the messege board and we can do anything if we have the time and the money!!!!!!!!!!!!!!!!!!
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1982 924 Race Car
1981 931 Road Car

numbbers · Posted: Fri Sep 17, 2004 9:25 am Post subject:

Well, I would say the reason we can't get 300 HP out of a two liter, is because the factory has a whole lot more money than any of us.
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1980 924 Turbo

Zuffen · Posted: Tue Sep 21, 2004 1:39 pm Post subject:

relocating the turbo would loose perfromance but gain in longevity.

knife edge the crank

dry sump

replace rods and pistons with customs

balance engine

seal off the head and add independant oiling and cooling

head studs

lighten the flywheel

custom intake and aftermarket EFI

951 turbo, ceramic coat, ball bearing

rework the wastegate and make adjustable

replace mechanical ignition dist

large intercooler

engine and car - remove weight , remove weight and remove weight

I think you can see 325 to 350 without too much effort.

220 from a 2 liter in 1980 was pretty impressive and with good economy

Toss the economy restriction out and use modern systems, the old engine (a bit heavy) should be more relaible after tweaking, than a modern equivalent
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Bob Dodd - 924turbo@cox.net
931 1982, 944 1982 euro, 924S 1988SE, 93 968 tip 06 Silver Cayenne S, 06 Black Cayenne S

I have Way too many cars, parts for the 931,944 and 951