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Sandman · Joined: 23 May 2006 Posts: 3 Location: Utah

Ok, so let's put this all in one place, starting from scratch with a bone stocker 931, where would you put your must have upgrades, engine,brake, body or electrical. 10 and why...discuss..lol

flosho · Posted: Thu May 25, 2006 8:31 am Post subject:

1. Lowering Springs
2. Konis or bilstien shocks
3. Good Tires
4. Intercooler
5. EFI/ignition conversion
6. manual boost controller
7. 2.5-3" mandrel bent exhaust
8. Head work: cam, big valves, stiffer springs, etc
9. Upgraded turbo k26/28 or w/e
10. Stroker Kit

Some where in there could be a custom intake manifold and bigger throttle body as well...
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Khal · Posted: Thu May 25, 2006 10:18 am Post subject:

I'm with flosho for most part.

But it's a bit tricky, because all the Australian-delivered cars, like all the "Euro" cars, I believe, came with disc brakes. If you have an early U.S. Turbo with drum brakes on the rear, I would suggest the first upgrade to do would be to put on the disc brake setup from the "Euro" cars.

You'd also have to assume that the car would be in less than perfect condition. Lets face it, after 25+ years, they're all gonna be in need of a little TLC. That being the case, I'd be tempted to immediately fit new, good shock-absorbers (say Bilstien or Koni, etc...) and springs, lower the car if possible and put good, high-performance tyres on it.

I can't stress it enough: Good shock-absorbers/springs and good tyres will absolutely transform the performance of the car!!!

As will the disc brakes if you don't already have them...

Performance upgrades for the engine also get tricky because all the Euro/Australian/Rest-of-the-World cars had about 170hp (or more) whereas the U.S. cars were around 155hp, IIRC. As I understand it, this is because the U.S. cars have a lower compression ratio and lower boost. If you've got a U.S. car and you're not tempted to pull the engine apart (and I certainly wouldn't, assuming it's running OK), I'd suggest installing a boost controller and boost gauge and then upping the boost to 10psi. Given that this is what the "Euro" cars run and that the U.S. cars have lower compression, it should easily be able to handle 10psi. Quite possibly a lot more, as other members can attest...

The next obvious modification is installing an intercooler. Pretty straight-forward, relatively speaking.

After that, the sky (and your budget) is the limit!

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'80 924 Turbo

N-Dub · Posted: Thu May 25, 2006 1:00 pm Post subject:

OT - Khal can you remind me why your car is a 932? Is that a spoof or Carrera GT?
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'79 924 now Totaled! Carrera GT bodywork for sale!
'87 951

Lizard · Posted: Thu May 25, 2006 2:05 pm Post subject:

931 LHD

932 RHD

it is all about the position of the wheel
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3 928s,

sequential · Joined: 18 Nov 2005 Posts: 500 Location: BANNED

P924 · Joined: 14 May 2006 Posts: 57 Location: Belgium

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924 1981
911T 2.2

Khal · Posted: Thu May 25, 2006 7:10 pm Post subject:

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Why change the exhaust system? It is stainless steel and does not rust. I believe mine is still on and the original. No cat straight pipe and sounds nice. 1979 931 same as Khals 934. Someone told me he rides side saddle.
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

flosho · Posted: Sat May 27, 2006 3:24 am Post subject:

John Brown · Joined: 07 Nov 2002 Posts: 903 Location: Leesburg VA

I don't understand why the 'lowering' springs. Well, I do understand; but don't agree.

The cars are balanced as built. Usually 'lowering' springs are Weltmeister 200, 220 or 250. The rear gets adjusted down to match. But the balanced car now is moved toward (more than stock) understeer.

There are ways to dial this out but nothing very satisfactory unless the torsion bars are also replaced. As torsion bars are a pain and/or expensive (relative to the front springs replacement) they usually are left alone.

Curbs and speedbumps become road hazards. So the result is a firm ride but not a noticably better handling car and susceptible to normal road trash.

I know. The curmudgeon grumbles again. Recently had my daughter change out the 55 series tires on her Focus (which is a really nice handling little car by-the-way) for 60 series. The 55s were just TOO much trouble with damage and rough ride on the street for a daily driver.
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John
80 931 - #931 44Cup
99 Escalade - tows track cars
gone but not forgotten: original 924.org car - 82

John Brown · Joined: 07 Nov 2002 Posts: 903 Location: Leesburg VA

flosho · Posted: Sat May 27, 2006 5:38 am Post subject:

Sandman · Joined: 23 May 2006 Posts: 3 Location: Utah

so no one else wants to make a list, other than flo? ...hmmm..maybe they ARE perfect just the way they are!

morghen · Joined: 21 Jan 2005 Posts: 9095 Location: Romania

Sorry to hijack the thread...but i dont want to start another one just for this question:

what will a 2.3 Inch exhaust system...no cat..straight pipe...just the final piece(a 944 one) do to a EURO 924 NA?

could it make it run worse ?

I am planing on mounting a larger TB and that exhaust...for now i have the 944 final piece and 6 meters of INOX 2.3inch interior diameter pipe.
i'm also going to change the plugs,injectors and the filters....looking for visible/senseble improvements....will i get any?
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