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Suspicious timing chains delivered
Hoping that some of you builders can weigh in on the timing chains I received that have seams in the rollers- very concerned about this, as my factory chains did not have any seams in the rollers.
Forum discussion: Suspicious looking IWISS timing chain delivered today...
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Dave 1985 Porsche 911 Carrera Coupe 3.2 to 3.4L "Carina" PCA Member- Sacramento Valley region Last edited by 85RedCarrera; 04-20-2025 at 05:57 AM.. |
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04-20-2025, 05:47 AM
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Location: Langley,B.C.
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You have 2 threads going on 2 subforums, please ask a moderator to merge them into one on this sub forum.
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-24-2025, 05:23 PM
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Quote:
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Dave 1985 Porsche 911 Carrera Coupe 3.2 to 3.4L "Carina" PCA Member- Sacramento Valley region |
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04-27-2025, 06:27 PM
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Excellent!
And I did reply to your other post as well regarding what we found.
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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04-30-2025, 05:09 PM
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Well, I returned my regular timing chains with seams in the rollers, and re-ordered a set of Heavy Duty (Race) IWIS chains.
I just received them, and these chains also have seams in the rollers.. not sure what to do at this point- apparently, this is how they are being made now.
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Dave 1985 Porsche 911 Carrera Coupe 3.2 to 3.4L "Carina" PCA Member- Sacramento Valley region |
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08-02-2025, 05:54 PM
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PCA Member since 1988
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On the other thread you measured the lengths of you used chain and new chain. They were within .5mm total length. I would reuse the old ones.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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08-02-2025, 11:01 PM
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Try not, Do or Do not
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Over the years, we have been asked to rebuild engines that were relatively low mileage and chains being over $150 a pair, we invented a tool to measure the chains accurately.
That said, we still use new chains on every build. Caveat: race engines with only a few hrs don't need new chains.
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Henry Schmidt SUPERTEC PERFORMANCE Ph: 760-728-3062 Email: supertec1@earthlink.net |
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08-03-2025, 06:34 AM
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Quote:
I re-measured my chains against these latest new ones, and apparently my method of measuring was quite poor the first time around- I had my wife help this time. I put both chains over a straight rod, and let them hang, then pulled down on firmly both of them to measured the difference at the bottom of the chains. I got 3.5mm this time! 3.5mm x 2 = ~7mm total chain length difference. It is also interesting to note that when I place them on their sides on the bench and arch them along their sides, that they have an identical arch- no wear shows up using this technique. I used to check my motorcycle chains this way, and would always have a smaller radius on a worn chain- not so with these chains. Perhaps because they are a double chain? IDK
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Dave 1985 Porsche 911 Carrera Coupe 3.2 to 3.4L "Carina" PCA Member- Sacramento Valley region |
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08-03-2025, 11:03 AM
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Carina
Porsche
Retor 911
Scarab
Riley
