Grooved discs.

[TTM]

The oil lines on the S2 oil cooler are on the same side while on the turbo's they're on opposite sides.

 

[Hilux]

[blockquote]

[blockquote]quote:

ORIGINAL: TTM

Some 944 turbo had air ducts in the front bumper which later ones (90, 91) don't seem to have, although they're listed as stock 944 turbo parts. Perhaps they were M030-only.

[/blockquote]


I have only seen them on original M030 cars.

Slight thread hijack [8|]

Mine has these and also the hub deflector plates.

What ducting does anyone use to improve the airflow to the inner side of the disc and where can I get it?

Thanks[/blockquote]

 

[Diver944]

ORIGINAL: Hilux

What ducting does anyone use to improve the airflow to the inner side of the disc and where can I get it?

I used flexible brake ducting from http://www.tridentracing.co.uk/ at Silverstone (ask for Bill Bray and mention the club). They have all different diameters and I think I used 4" (but cannot check at the moment [8|]) which compresses to a nice oval shape to fit the duct and also provide clearance for the tyres.

IIRC I used 2 metres for around £30

 

[edh]

http://www.merlinmotorsport.co.uk/AIR-DUCTING/c18/index.html

 

[sawood12]

The ducts on the turbo's definately go all the way through on both sides. I spotted this when my car was up on ramps at it's recent MOT. The air enters the lower grill at the outer edges and is ducted straight through to the wheel arch without obstruction. If I recall correctly the oil cooler was mounted next to the duct and higher on the drivers side and is pretty small barely 12"x6".

 

[944Turbo]

I believe all turbos until 1990 had the ducts when they were dropped. I actually believe the curved sections in the batwing contribute air to the brake disc deflectors ( one reason I dont have a splitter yet which all seem to do away with them). I dont know if Porsche discovered they were as effective as the holes through the arch or wether it was a cost saving measure on the later cars. As the weight had increased (10 speakers, sports seats etc.) I dont think they would want to reduce the braking effeciency by dropping them.
Tony

 

[Fen]

Possibly it was just felt they were not required, hence the acceptance of a degradation in brake cooling. The MY90 Turbo was much less good from a performance perspective than a MY89 car in terms of suspension and unsprung weight (because of the change from forged to D90 rims) which suggests to me that there was a cost cutting exercise that was allowed to erode into the performance a small and acceptable (to Porsche) margin. I even wonder that the bridge spoiler was actually developed as it was cheaper than the rubber one to make.