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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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cam timing made easy? adjustable sprockets
I just stumbled across these.
Very slick. I wonder if they will hold timing. Certainly easy to adjust. I assume that you set torque on the cam fixing nut/bolt and then clock the sprocket with the 6 adjusting bolts to set timing.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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03-23-2006, 12:54 PM
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abit off center
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what would really be nice is if you could adjust it on the fly!
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______________________ Craig G2Performance Twinplug, head work, case savers, rockers arms, etc. |
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03-23-2006, 02:37 PM
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3 restos WIP = psycho
Join Date: Feb 2005
Location: North of Exit 17
Posts: 7,665
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- 1965 911 - 1969 911S - 1980 911SC Targa - 1979 930 |
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03-23-2006, 03:02 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Not a chance thats going into any Porsche I'm responsible for.
Timing is simple with existing cam sprockets. My problem is all the extra parts spinning around and possibly coming loose. I would not want a retaining screw and washer going through the cam drive, with all the havoc it would create. This is not a improvement at all. Maybe great for the Brit's, they love to tinker with their cars all the time.
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DOUG '76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's. '85 911 Carrera, stock, just painted, Orient Red |
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03-23-2006, 05:00 PM
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3.4 Bigger is better
Join Date: Nov 2003
Location: South Dakota
Posts: 1,497
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These are made in the USA. Found them at JB Racing for $375.00 for the pair, same pictures and part numbers. What are the advantages of having the adjustable sprocket? I agree that there are more parts there but they also claim to be lighter than stock. Anybody used these?
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Michael 88 911 Diamond Blue CE Carrera 3.4 HC3.4 member 2020 Honda Passport |
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03-23-2006, 08:02 PM
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Less brakes, more gas!
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Doug-
This kind of adjustable cam wheel has been around for years... I've not heard of many of them coming apart. Though, on most other makes they are external to the engine oiling system and might not cause severe havoc. Even so, isn't the clearance from sprocket surface to cam housing cover tight enough that the screw may not be allowed out? Just an academic discussion, really, as I agree with you. We already have adjustable sprockets... in essance  Price is way out there too! -Michael
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 Michael '82 Euro SC 'Track Rat' 22/29 Hollows, 22/22 Tarrets, Full ERPB F/R, Rennline Tri Brace, Glass bumpers, Pro 2000's, 5 pts, blah blah blah '13 Cayenne GTS |
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03-23-2006, 08:14 PM
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Registered
Join Date: Jun 2004
Location: Rio Rancho, New Mexico
Posts: 1,325
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Michael,
I don't know the answer whether the cam housing cover is close eough to catch a loose screw. Could be..... I agree with you, the price is way out there. I see this as another solution without a problem. I would rather see a system that would automatically advance cam timing within a prescribed parameter. I would also like a timing chain system for my '76 that uses a 964 and later type takeup for the idle side of the chains, rather than the sprocket wheel pushed against the chain with the tensioners. Do these and you have my undivided attention. Don't get me wrong, I like innovation. I just don't see it in this case.
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DOUG '76 911S 2.7, webers, solex cams, JE pistons, '74 exhaust, 23 & 28 torsion bars, 930 calipers & rotors, Hoosiers on 8's & 9's. '85 911 Carrera, stock, just painted, Orient Red |
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03-24-2006, 11:12 AM
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1969 and 1986 Porsche Targa and Coupe 1720cc and 3
Ugly Betty
