924Board.org

[crow.magnum]

cheers mate

[KlaasyT]

Hi. sounds like a great upgrade. I would be cautious when bending those steering arms though. It will obviously change the toe spec but it will most likely also change the ackerman angle(toe out on turns). This specification is designed in the shape of the steering arm in relation to the wheel base and front axle track width of the vehicle.
Basically when the car turns, the inside wheel needs to follow a tighter radius than the outside wheel. If this does not happen than the tires will fight eachother and scrub which would mean less traction and/or stability in turns.

just my thoughts

best
Clarence
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81 931 Minerva Blue
72 911t Irish green
84 911 Carrera Targa sold
72 911t rs look project
71 911e rusty future project

[Raceboy]

No it won't, because any and all differences will be dialed out on alignment shop. Remember, 951 spindles already have steering arms a bit more inside, hence the modification.

Before performing this mod I consulted with very knowledgeable people, and few sessions at the track confirmed no ill effects.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

[carnuck]

Just a little mention (I work for them as a counter saleman but don't get paid commission) but NAPA recently partnered with Altrom so if you have Brembo numbers, we can probably get new rotors and other stuff for you.
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Yes, my Jeep has a Porsche 924 motor

[Browar]

I can confirm that on 924 S it is possible to install rear 4-pots without any problems. You need 951 ~86 disc brake, brake pads, caliper, bolts, and spacers (P/N 999.025.131.01). Brake hard line is very long so it connects to caliper without any problems.

Front is in progress...

Quick question.

Using 951 ~86 spindle has different bolt patern for shock absorber than early cars have. To connect late spindle with old shock You have to enlarge upper hole in shock mounting for spindle...

Does anybody done that?
Is it safe?
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Browar
eS
924 S `87

[ideola]

Hmmm...the spindles I have from an 86 951 with the big brake setup have exactly the same bolt spacing for the strut as the early spindles...the bolt holes are ~58mm center-to-center, and the flange is 20mm wide. The 87-onward spindles I've seen have a narrower flange at 18mm, but the holes are spaced about 5mm further apart.

Your options:

• Source the 86 951 spindles, which is unique to that particular model year and ONLY on the 951 as far as I can tell
  
• Use early spindles and make or buy an adapter bracket for the caliper
  
• Convert the whole shebang over to late setup, which requires spindles, hubs, and strut assemblies
  
• Try elongating the hole, BUT you will also need to use 2mm shims on the inside due to the narrower flange on the spindle

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erstwhile owner of just about every 924 variant ever made

[Rasta Monsta]

• Use the Wildwood caliper and adapter from Rennbay

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Toofah King Bad

• WeiBe (1987 924S 2.5t) - 931 S3

[ic932]

Part of a good brake upgrade is bigger discs. Wilwood don't offer this in their kit.

[Raceboy]

For the price of Wilwood front calipers, you can get the whole '86 951 brake assembly icnluding rotors and calipers. If one doesn't want to fabricate adapters for regular 924S/944 front spindle, you can use '86 951 spindle also but speedo cable hole must be drilled in order to use stock cable driven speedo.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold
'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

[Browar]

Before I start testing new set-up I would like to get some info/opinion about rear brake bias (regulator of pressure at rear brakes) - sorry for my english...

As I stated before I have 924 S 1987 EU.
Can I install 4-pot from 944 S2 without rear brakes valve? Or it will lock rear wheels? I use 8Jx16" telephones with 225/50.
944 Turbo -86 had such valve...
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Browar
eS
924 S `87

[ic932]

Browar, yes you can it will be fine. I think the 86'951 needed a bias valve because all four calipers have te same size pistons...but i'm not 100% sure on that because i've never had a set in my hands.

Bias valves are also found on other 944 models. I had an S with a bias valve and that did'nt even come with brembo calipers. I've also seen 951S models with valves fitted too.

If you feel you need one PM me, I have a couple. 1 from that 944S I mentioned and one from a MO30 951...can't remember the valve specs at the moment but there were 2 available. I've got a feeling they are 928 parts.

I've never felt the need to use them, and have never locked up the rears with any of my brembo conversions using 87- 951/S2/968 brembo calipers.

[Browar]

My concern is that 924 S is lighter car without ABS. Rear pistons are smaller but utilize the same brake pad front and rear...

I am asking before I do anything stiupid.
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Browar
eS
924 S `87

[ic932]

Are you going to use a 944 MC and front/rear brake circuit split?

[Browar]

No. I will stay with original parts.

You mean front/rear vs. X shaped lines (front left/rear right and front right/rear left)?

I think 924 S has brake circuit from 944...
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Browar
eS
924 S `87

[Browar]

Hi,

At the moment car has front spindle, hub, brake disc from 944 Turbo -86. Everything fits together very nice.

Car is before wheel aligment.
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Browar
eS
924 S `87