Annoying Brakes

[robwright]

Hi all not really a problem but sometimes when travelling at low speeds and I apply the brakes I can hear a small clunking noise. Not dramatic and I can't feel anyrhing through the wheel. I am running the standard Brembos for 944 turbo and have just bled the entire system today. It did appear to go away for a short while or maybe that was my imagination?? Other than that it's just the intermittent low speed musical brake applications, which I gather is not uncommon for our cars. I feel a liberal application of cooper grease coming on! Any body any ideas on the clunking? Every time I have the wheels off I check everuyhing for tightness and security and all seems to be fine.

 

[zcacogp]

Could well be simply the pads moving around a little in the calipers.

Happens quite a lot on my S2. (Much more when the car has last had the brakes applied when moving backwards, as the pads are then at the 'wrong' end of the calipers.) Nothing to worry about at all.


Oli.

 

[PSH]

Hi rob, few questions.. what type of clunk.. deep heavy clunk or light tinny , also front or rear?

Pete

 

[robwright]

Seems to be quite deep in it's sound as if something is moving. Mostly on the front but occasionally on the rear. Could be something or nothing but this is the first time I have run a car wuith 4 piston calipers so a bit unsure. Breaking peformance seems to be good (in fact very good) but I am a bit of a perfectionist and hate little niggly things.

 

[PSH]

hmm.. could be as Oli says and pads moving , do you know when the brakes were last serviced , may be worth giving them a check over and possible clean up. I have to say my brakes do not make any noise when applied either lightly or hard . Might be worth checking the plates fixed to the calipers , they can be forced up over time and foul against the pads which may be a possible cause.

Pete

 

[robwright]

Don't know when they were serviced no. I have only had the car a couple of months and the guy who had it before me rolled it out the garage every Sunday for a polish!! What's the point in that??? I am slowly working through the jobs, which thankfully almost all I can do myself. Dropped the coolant and replaecd the brake fluid today but I agree could be time for a caliper overhaul. I will put it on the list!!! I will probably do the camshaft and ballance belts next week. Probably a good idea before installing the dual port wastegate, chips and boost controller and shoving an extra 70 HP through belts that I don't know the history of I think. Had a result with the aircon. A guy in St Noets pressure tested it and replacement gassed it for 70 quid. Now pumping lovely frosty air. Not bad for a 21 year old car eh??

 

[PSH]

Nice wish my A/C worked[&:].. one of those things that's been on my list for far too long..lol
Glad to hear you've been bitten by the boost bug , don't forget to get the car remapped after you've had them installed you'll really feel the difference.

Pete

 

[robwright]

Yeah I went for the whole package from pauer tuning in the states. Vic seems a nice guy actually from the emails we have exchanged. The wastegate is blowing anyway so needs replacing. So extra 70 HP or standard wastegate for the same price - NO BRAINER!! My TIAL 38mm wastegate, MaxHP951 DME and KLR chips and manual boost controller have just cleared customs. Your 944 looks good by the way will get a pic of mine on here soon from a good angle. A previous owner though put a chavvy turbo decal on the front right wing. Thing is though the t**t went and laquered over the top of it after it had been put on!!! I know this 944 thing is a roller coaster but seem to be enjoying it so far. Not too much to spend before the car is proper good will have to do some track days I think. Although not sure about the potential for stuffing it into a barrier after spending a wad of cash on it!!

 

[PSH]

A previous owner though put a chavvy turbo decal on the front right wing. Thing is though the t**t went and laquered over the top of it after it had been put on

The cup cars had that as standard I believe, alas there are cheap versions also available to buy , just letting you know in case you have one of the cup cars and it's a geniune sticker...


Pete

 

[robwright]

How would I know if it is a genuine cup car? There is nothing in the docs to suggest it is ? I am thinking it was an ill thought out after thought by someone who thought it may be good. The car has must have had a respray in it's 21 year life?

 

[PSH]

affraid my memory is bad as i've forgotten most that i've learnt over the years about the cup cars. Rest assured though someone here will be able to answer that question with some authority. You may also find out what you need to know on google , I do know that 1988 was the year they arrived although they were replaced by the standard turbo the following year I believe with the same setup.

Come on you turbo S guys... help out here..[8D]


Pete

 

[robwright]

I must admit it doe feel fast. My previous was a BMW 330 coupe, which was 231 HP and it does feel quicker!! Or maybe that's just me. Didn't have any lag in that though just a big straight six!!!! Like Pete said c'mon Turbo S guys please reply!!! I have chips coming configured for standard turbo 220 without cat!!!

 

[PSH]

ahhh.. if 220 then not cup car.. cup cars were increased to 250bhp.... but 220 is good as it has the same block as cup cars, much stronger than later 250 models...


Pete

 

[PSH]

yes although to be honest I'm not sure for how long...certainly the early 220's have forged conrods and the crank was designed for 500bhp... the later 250's have cast.. it was a cost cutting issue. There are a number of other cheaper items on the later cars too, most noticeable being the door handles, early being PORCSHE inscribted later not.


Pete

 

[944Turbo]

Not sure about the crank or heard of any differences in the block either. The later cars had a better sump baffle but there are several variants through the range. Later cars were improved in other areas (gearbox/brakes/bigger turbo/leather/sports seats/the 1990 cars also had more advanced diagnostics) so costs did have to be cut to even get close to being competitive. One of the road tests of the day pointed out you could have an esprit turbo and a golf for the price of a late 944t. I think in 1990 they only sold around 200 944 turbo's
Tony

 

[944 man]

All 944s have a forged crankshaft. Early normally aspirated cars (early series ones) have forged rods too, which Porsche soon backed out of. Whether early 951s had them too I cant say. To add weight to my statement, in these internet-educated times, I will point out that all 924s have a forged crankshaft too.

 

[sawood12]

Aren't all crankshafts forged? Never heard of a cast crankshaft, cast structures just don't have the necessary material properties. You can get away with cast con rods as the forces are largely in compression.

On the brake problem - have you checked bushes and suspension? Just because it clunks when you brake doesn't necessarily mean it's the brakes. Could be a slit ARB bush for example.

 

[Frenchy]

My Turbo S has one of those chavvy turbo wing decals fitted by the barrys at the Porsche factory in Stuttgart, i quite like it though it was a delete option.
So am i correct in saying that early forged rods will go into my Turbo, are these fitted to the early dash cars ? how can you tell forged from non forged items.
Going to Florida next week and Mr Pauer (sp) is sending me some bits to the hotel []

 

[sawood12]

Well there are two part numbers in the PET:-

944.103.008.02 for M44.05-10, M44.40 models (not sure what that means!)
&
944.103.001.00 for M44.50/51, M44.52 models.