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Buchanan Automotive

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About Buchanan Automotive

  • Rank
    Weissachologist

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  • Location:
    Sydney
  • Ride/s
    944S2/951/928/968

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  1. Buchanan Automotive

    928 Wheel Size

    Be careful with the cast alloy D90's as shown in the photo above ( light blue 928S )because the correct ones for a 928 are very rare , where as the incorrect ones are quite common & will not work or even fit over the 928S4 mid blacks front brake calipers Only the 1990 & 1991 year model 928GT had the 928 specific wheels in the cast and painted D90 style , for the 1990 & the very rare 1991 928S4 , those cast and painted wheels were an option only M400 & I have never seen a 1990 or a 1991 928S4 that came with those wheels as an option Note } the 1990 & 1991 928S4 had as standard the Fuchs forged and anodized wheels 16" x 7" & 16" x 8" & yes these fit over the 928S4 brakes & they are very light as well --------------------------------------- The ones you do not want in that D90 style are the wheels from a 1989 - 1991 944S2 ( very common ) or from the 964 1990-1992 944S2 front = 7 X 16 X ET 55 ( will not fit over the 928S4 front brakes / the wheel spokes touch ) Rear = 8 X 16 X ET 52.3 964 ( 911 ) front 6 X 16 X 52,3 ( way too skinny & will not fit over the 928S4 front brakes ) Rear 8 X 16 X 52.3
  2. Buchanan Automotive

    928 Wheel Size

    Genuine Porsche 17" dia cup 1 or genuine Porsche 17" dia cup 2 wheels have the ET number & the width number cast into the outside of the wheels on either side of the valve stem hole , aftermarket cup wheels do not . So that means ( Front ) genuine Porsche Cup 1 or genuine Porsche Cup 2 wheels are 65 mm ET , either for the 928GTS or the 968 Genuine Porsche 928 & 968 Cup 1 & Cup 2 wheels are } Front = 7.5" X 65 ET X 17" Rear = 9" X 55 ET X 17" You will probably find you have the Mille Miglia aftermarket wheels , because they came in 7.5 " X 52 ET & these were very common here in Australia 20 + or so years ago because they were so cheap , but they are heavy & they bend relatively easily in both planes ( oval/bent rims & twisted spokes ) , we have thrown out heaps of them over the last 20 years ET 55 mm is 10mm out ( in relation to steering feel I find it crap to drive in relation to 65 mm ET) ET 52mm is 13mm out ( that's just a little bit more crap to drive ) ET 50 mm is 15mm out ( that's just a bit more more crap to drive) Its just mathematics , look up / Google " Scrub Radius" , you will see why it becomes at time a bit dangerous to drive , I am used to driving Porsche's with the wrong ET ( poor choice of wheels ) and in certain road conditions it still catches me out , meaning the steering wheel will for a split second wants to violently turn into oncoming traffic or the other direction It makes no difference to me what people choose , just understand how bad it can make the car feel If you drove you're 928S with a correct set ( 65mm ET ) front wheels and new tyres ( not crap tyres , but something that is a decent tyre ) you will never ever go back to any other ET , its that good
  3. Buchanan Automotive

    928 Wheel Size

    In regards to steering feel the ET is very important & as you have correctly mentioned , the standard ET ( wheel offset ) is 65mm , going to a ET 50mm ( 15mm per side difference ) = 30 mm total difference will result in a lot of tram tracking , particularly after the new front tyres settle in ( a few thousand kms from new ) , basically the car will follow irregularities in the road surface , some of which will shock you when it catches you by surprise as you are driving along even at 50Kmh and at 110 or 120Kmh on a free way you will be compensating with lots of steering inputs ( with you're hands ) which at first is not that noticeable , but after an hour or so you will know what I mean , its very tiring But if you drive a 928 ( any ) from the very beginning with the wrong ET front wheels ( 13 mm or 15 mm incorrect ET ) , you will be none the wiser as this is the only reference point you have & you will think , gee these cars steer a bit funny Google } Scrub Radius In regards to the 16" dia 928S cast & painted " Telephone style" wheels , these were fitted by Porsche as standard to the 928S 4.7L from 1980 to 1985 inclusive and were an option on the 928 4.5L > 1982 , we have a 1984 928S here at the moment with the standard Telephone wheels From model year1986 ( F vin letter ), the 928S had as standard the Brembo front "mid size blacks " 4 piston alloy front brake calipers ( 928S4 style ) and the Brembo 4 piston " small size blacks " on the rear , Porsche was not happy with the very very tiny clearance that the thicker cast alloy rimmed telephone style wheel gave on the front ,so Porsche installed as standard the more expensive Fuchs forged wheels & these gave a better clearance for the "mid blacks ", thats because being forged the rim thickness was less I have test fitted a single telephone wheel onto one side ( front ) of a 928S4 and it was very tight & the wheel weights ( stick on) would not clear the brake caliper at all , but if you are fitting caliper adapters to a early 928S to fit S4 front brakes , it may be either a slightly better clearance or slightly worse ( fractions of a millimeter ) Regards Bruce Buchanan
  4. Buchanan Automotive

    987 engine issue from mechanic report

    It could be chain tensioners as Peter has mentioned or it could also be chain tensioner pads coming apart causing more slack in the chains. if its the tensioner pads then its rebuild time. regards Sean
  5. Buchanan Automotive

    New 944 Need Wheels

    I haven't heard anything about these new state laws being introduced , can you find the link to it ?
  6. Buchanan Automotive

    New 944 Need Wheels

    Hi Mark ( Bumble ) , Sean & I purchased a 2nd hand 1991 year model Japanese import L/H/D 944S2 about 10 years ago and that car ( being L/H/D ) it had the battery in the front ( just like a USA 944S2 ) , but unlike the USA version it had the Euro driving / fog lamps & the Euro front guards , meaning No USA indicator lamps Being a 1991 year model , these was no way at the time of ever having the car registered in NSW . It was imported into Australia as a job lot with a lot of other Porsche cars , that the company importing them had to take the L/H/D 944S2 as part of the package ( job lot ) and we purchased it from them because we wanted the engine & drive line & the interior ( except the L/H/D dashboard )and the near perfect body was scrapped as no one wanted it , even as a whole car the no one wanted it & as the consequence it was cheap & the cars fate was sealed We have a customer with a 1990 944S2 L /H / D Japanese grey import and that car has the battery in the front ( like the USA version ) & this car was saved only because of the fairly recent NSW " Rally "rego , other wise this car would of been scrapped as well Maybe the R/H/D version of the Japanese delivered 944S2 has the battery in the rear , I have no idea because we have never seen a R / H / D Japanese delivered 944S2 As for the battery isolating switch , no, that was installed by later owner/s & yes , I would give it a 99% chance it was placed so they could run a emergency pull cable from it to a " red " pull handle in the corner of the windscreen & it ( the cable pull handle ) would of been tapped in place to the windscreen ( race tape ) with a sticker on the windscreen ( arrow ) pointing to it saying " Battery Kill " , so yes it was probably rallied as no factory factory 944S2 or 951 sold as a road car had it Its reasonably rare to see Japanese imported Porsche 944 models in Australia ( particularly a R/H/D one ) , these grey imported cars are generally from HK or UK or South Africa , part of the reason why Japanese models are a bit rare from Japan is its trendy in Japan ( and legal ) to purchase L/H/D European cars from new in Japan & it was very popular in Japan to do so Regards Bruce B
  7. Buchanan Automotive

    the clutch job

    the bearing in the end of the crank Regards Sean
  8. Buchanan Automotive

    the clutch job

    I think Brian means "Rear Main Oil Seal " ( not bearing )
  9. Buchanan Automotive

    the clutch job

    Its pretty essential to replace the guide tube as they tend to crack with age. it may look ok but they are pretty cheap from BWA. replace it. Same goes with the needle bearings and have a look at the clutch fork pivot shaft for any wear. Always get the flywheel resurfaced as well, its really not worth the risk to have clutch shudder after a big job like a 944 clutch. Other items we always replace are the clutch plate bolts, flywheel bolts and spigot bearing. That way you know its going to work as it should. You can get these parts from Porsche but I'm sure BWA and Autohaus will be cheaper Regards Sean
  10. Buchanan Automotive

    New 944 Need Wheels

    I had a feeling it was a grey import 944 , because I have never seen a 1987 ( year model ) Australian delivered 944 , Porsche cars Australia had way too many 1986 944 cars left unsold , so we received some but not many ( I think )1987 models , but like I said I have never seen one & I am not including tourist deliveries , I am just concentrating on the ones in stock at PCA back in early 1987 . Its a 2.5L 944 , probably a UK or HK import ( R/H/D ) & being 1987 it will be ( originally ) a leaded car , meaning no O2 sensor & no Cat Converter , looks like quite a nice car Defiantly not a converted USA car nor a Japanese delivered 944 , because the battery is in the boot Regards Bruce B
  11. Buchanan Automotive

    New 944 Need Wheels

    Hi Zacc , from model year 1986 all the 944 range had the teardrop ( oval ) dash , so that means } 1986 = 944 2.5L NA & the 944 Turbo ( 951 1987 = same as above plus the first year of the 2.5L twin cam 16v ( 944S ) 1988 = same as above ( last year for the 2.5L 944S ) 1989 = 944S deleted & in its place the new for 1989 3.0L twin cam 16v ( 944S2 ) also the last year in Australia for the base model 944 which was now a 2.7L 8v & introduction of the 250HP 944Turbo ( Turbo S ) in Australia Note A ) easiest way to pick a 944S ( as already mentioned ) is the 16v twin cam engine Note B ) The standard wheels on a 944S was the 15" dia telephone wheels , 16" dia ( Fuchs forged and anodized wheels "similar" to the 928S4 style wheels was an option ) Note C ) 944 Front wheels ET ( off sets) 1982 - 1986 including 951 = 23.3mm ( very important when choosing wheels ) 944 / S Front wheels ET 1987 - 1989 = 52.3 mm ( Not M030/ 758 ) ( very important when choosing wheels ) 944S2 Front wheels ET 1989 - 1991 = 55 mm ( Not M030 / 758 ) ( very important when choosing wheels ) 951 Turbo S Front wheels ET 1989 -1990 = 65 mm with M030 ( very important when choosing wheels ) Note D ) Easy way to determine the year model 1986 will have a " G " in the Vin number 1987 will have a " H " in the vin number 1988 will have a " J " in the vin number ( the letter i was not used as it looks like a number ) Regards Bruce & Sean Buchanan Buchanan Automotive
  12. Buchanan Automotive

    Engine does not match chassis number

    Not a lot, seems more prevalent in cold climates? guessing this has to do with the different coefficient of friction between the pistons and block material.
  13. Buchanan Automotive

    Engine does not match chassis number

    This is quite rare, only cars where the failure were within 6months or so got a new power unit. Most engines were sent straight back to Porsche without being dismantled by the dealer. These engines were then used as cores to build power units for other failed engines around the world. Basically they try and salvage as much as possible from the failed unit and fill in the rest with new parts. There have also been cases of remanufactured units being welded back (for instance say a broken crankcase) and then some new parts fitted and sent out to dealers as a unit for replacement. The issue was that these remanufactured units were the same as the units that failed and have the same failure rate and failure modes. Even new power units had the same failure rate and failure modes if you were to get one. Some M96 engines have been replaced multiple times. Some have never been replaced. I can say that during their highest exchange of remanufactured engines a local dealer was doing up to 4-5 engine swaps per week. regards Sean
  14. Buchanan Automotive

    Engine does not match chassis number

    On the M96 engine model cars we work on i would say around 40% do not have their original engines, really common and they have multiple failure modes. We have one in that has the rattle of death at startup. Not sure yet if its chain guides or tensioners but if its guides the engine is going to be split. original engine 45,000kms. Regards Sean
  15. Buchanan Automotive

    Looking for S2 or 968 block. Almost any condition.

    Actually Patrick, the 2.7 is using the 104mm bore siamese block. They used a 2.5 crank to reduce capacity Regards Sean
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