Lets talk about cam chains.
04-25-2009, 09:33 PM
#16
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My other concern is if Porsche decide to stop selling a part - maybe the chains - where do we go from there?
Back to OEM and after market - just we need to choose the best for the job.
Part in question - Boge Gray shocks have just got NLA - where do we go from here?
Back to OEM and after market - just we need to choose the best for the job.
Part in question - Boge Gray shocks have just got NLA - where do we go from here?
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
04-25-2009, 09:41 PM
#18
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Roger...........the only diff I can see is the links colour.
The chains that are on the car from factory have the different coloured links 7 apart for ease of timing of the cams.
I haven't put a micrometer to compare but a new Bilstien chain must be better than the 20YO.
From my m/cycle experience we always measure chain length as a sign of wear. As such we should also be considering new vs old overall length (the blue pill may be the fix
)
The chains that are on the car from factory have the different coloured links 7 apart for ease of timing of the cams.
I haven't put a micrometer to compare but a new Bilstien chain must be better than the 20YO.
From my m/cycle experience we always measure chain length as a sign of wear. As such we should also be considering new vs old overall length (the blue pill may be the fix
)
04-25-2009, 09:43 PM
#19
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I do not want to sell anything that is not up to spec. So I am with you all the way.
Just like to do it factually rather than by "lynch mob" 8>).
Once we know I can let my customers make a choice based an fact and price.
Tell me about the 968 chain Greg? Is there a difference?
Just like to do it factually rather than by "lynch mob" 8>).
Once we know I can let my customers make a choice based an fact and price.
Tell me about the 968 chain Greg? Is there a difference?
Post 9, they look like the chains that were in mine, heavy and solid looking.
04-25-2009, 09:47 PM
#20
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Roger...........the only diff I can see is the links colour.
The chains that are on the car from factory have the different coloured links 7 apart for ease of timing of the cams.
I haven't put a micrometer to compare but a new Bilstien chain must be better than the 20YO.
From my m/cycle experience we always measure chain length as a sign of wear. As such we should also be considering new vs old overall length (the blue pill may be the fix)
The chains that are on the car from factory have the different coloured links 7 apart for ease of timing of the cams.
I haven't put a micrometer to compare but a new Bilstien chain must be better than the 20YO.
From my m/cycle experience we always measure chain length as a sign of wear. As such we should also be considering new vs old overall length (the blue pill may be the fix
)and that is what wears sprockets out.
I put over 100,000 miles on a harley with one set of sprockets, but went through a bunch of o-ring chain.
04-25-2009, 11:54 PM
#22
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Another good thread about chains.
https://rennlist.com/forums/928-foru...ain-broke.html
Funnily enough I'm about to order some - was planning on going with the IWIS racing ones based on older posts.
https://rennlist.com/forums/928-foru...ain-broke.html
Funnily enough I'm about to order some - was planning on going with the IWIS racing ones based on older posts.
04-26-2009, 11:22 AM
#23
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Nothing has changed really from the other threads and a lot of guess work.
I would like to review the choices and see which offers the best solution.
IWIS is after market but they make the racing chain as well as the (so called) stock chain.
Bilstein make the stock chain - again maybe not to the same spec as Porsche.
What about the 968 Racing Chain that Mark mentioned - any info on that - part number.
Porsche is Porsche so lets compare them all and find out what the differences are.
I would like to review the choices and see which offers the best solution.
IWIS is after market but they make the racing chain as well as the (so called) stock chain.
Bilstein make the stock chain - again maybe not to the same spec as Porsche.
What about the 968 Racing Chain that Mark mentioned - any info on that - part number.
Porsche is Porsche so lets compare them all and find out what the differences are.
04-27-2009, 08:23 AM
#26
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Roger
I just replaced my chains with the ones you supplied and did compare to the OEM off my car.
My 88 S4 has only 60,000 miles on it and thet are definetely the factory deal and the replacement you sent is definetely a finer cut.
With the amount of load on them they will out last me as i only do 6-7,000 miles per year
I just replaced my chains with the ones you supplied and did compare to the OEM off my car.
My 88 S4 has only 60,000 miles on it and thet are definetely the factory deal and the replacement you sent is definetely a finer cut.
With the amount of load on them they will out last me as i only do 6-7,000 miles per year
04-27-2009, 11:20 AM
#27
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I have taken some measurements of the chains today.
The overall thickness of the stock chain is .481 and the FEBI is .441 at the thickest part of the link on both.
Over 16 links when I gently took up all the slack in the FEBI chain (new) and then pulled the slack out I came up with a little over .040 in pitch change over 16 links.
That is the part that worries me.
The pitch change in the stock Porsche chain with at least 130,000 miles on it was so small that I could not measure it over 16 links.
The weight of the stock chain was 172.5 grams and the FEBI was 155.5 grams.
The actual pitch of the new and used chains were for the most part identical when in tension.
Neither of these are what I would call a performance chain as they both have split rollers.
The other Greg
The overall thickness of the stock chain is .481 and the FEBI is .441 at the thickest part of the link on both.
Over 16 links when I gently took up all the slack in the FEBI chain (new) and then pulled the slack out I came up with a little over .040 in pitch change over 16 links.
That is the part that worries me.
The pitch change in the stock Porsche chain with at least 130,000 miles on it was so small that I could not measure it over 16 links.
The weight of the stock chain was 172.5 grams and the FEBI was 155.5 grams.
The actual pitch of the new and used chains were for the most part identical when in tension.
Neither of these are what I would call a performance chain as they both have split rollers.
The other Greg
04-27-2009, 12:32 PM
#28
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Ive been usng the IWIS racing chains and they were a little beefier than stock!
Racing for about 5 years on them. 70 race days or so
mk
Racing for about 5 years on them. 70 race days or so
mk
