M117 adjustable timing gears - Mercedes-Benz Forum

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post #1 of 15 (permalink) Old 09-20-2015, 03:41 PM Thread Starter
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M117 adjustable timing gears

Has anyone purchased these or know if they are still available? The "contact" link does not work and I don't want to blindly send off money. I was having my own made but they will end up costing as much as these by time I am done.

adjustable cam gears for m117 motors - feind motorsports

Tony
280SE 3.5 Coupe
Stick shift
3.27 Axle
5.6 Iron block build in progress

Last edited by 3.5 Tony; 09-20-2015 at 03:45 PM.
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post #2 of 15 (permalink) Old 09-20-2015, 04:11 PM
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Neat! I've never seen these before. Not cheap, but very neat.

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post #3 of 15 (permalink) Old 09-20-2015, 08:33 PM
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Originally Posted by 3.5 Tony View Post
Has anyone purchased these or know if they are still available? The "contact" link does not work and I don't want to blindly send off money. I was having my own made but they will end up costing as much as these by time I am done.

adjustable cam gears for m117 motors - feind motorsports
Haven't dealt with them, but they do have a facebook page. On it the contact info is:
Phone 979.731.8100
Email info@feindms.com

Would you be using them for performance reasons or to just to correct for stretch/wear?

1972 350SL 4.5L - MBGraham, near Kingston, Ontario
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post #4 of 15 (permalink) Old 09-20-2015, 08:55 PM Thread Starter
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Several reasons. As part of my iron block 5.6 project I had the block parallel decked .030 and I will need to correct the valve timing. Most/all the 5.0/5.6 cams have greatly retarded cam timing for emission reasons and I want to experiment with cam timing-both difficult to do with the small range of offset woodruff keys.

Tony
280SE 3.5 Coupe
Stick shift
3.27 Axle
5.6 Iron block build in progress
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post #5 of 15 (permalink) Old 09-21-2015, 04:17 AM
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Originally Posted by 3.5 Tony View Post
... As part of my iron block 5.6 project

???
What did you bore out to make an iron block 5.6?

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post #6 of 15 (permalink) Old 09-21-2015, 05:33 AM
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Originally Posted by Fonzi View Post
???
What did you bore out to make an iron block 5.6?
I think he punched out an old iron block 4.5 M117 to 5.6

http://i30.photobucket.com/albums/c328/nutz4benz/W123/6C3A9CA5-EDFF-4834-8125-34B70B20A676_zpsiyesrawz.jpg
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post #7 of 15 (permalink) Old 09-21-2015, 06:06 AM
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Originally Posted by Nutz 4 Benz View Post
I think he punched out an old iron block 4.5 M117 to 5.6

I know this goes OT, but is the crankshaft / stroke what makes the difference in a m116 vs m117? I understand that the DOHC m119 has an shorter stroke and the AMG hybrid m117/119 DOHC 6.0 uses an m117 crankshaft for the longer stroke. I have always wondered why the very similar m116 and m117 engines had different designations despite being so similar: 3.5-4.5, and 3.8-5.0, an 4.2-5.6. Is it the stroke?

Sorry for going OT.

I hope you get in touch with the company for the very neat cam sprockets.

If it is of any help, I've got North American 4.5 and 3.8 cams (which I assume are of no interest).

I do think that custom m117 (5.0?) camshafts are available or can be made to match euro specifications. I interested, I can dig up the info. The w126 board has a lot of info on this stuff, as do the guys at Amgclassic.

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post #8 of 15 (permalink) Old 09-21-2015, 06:47 AM
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If I recall correctly, he used a 5.6 crank, rods and pistons in the bored out 4.5 plus other machine work.

If that site selling adjustable gears is legit, I wouldn't mind those lumpy M117 cams they have there also.

http://i30.photobucket.com/albums/c328/nutz4benz/W123/6C3A9CA5-EDFF-4834-8125-34B70B20A676_zpsiyesrawz.jpg
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post #9 of 15 (permalink) Old 09-21-2015, 08:08 AM
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What's the benefit of boring out a 4.5 iron block instead of just using a 5.6 alloy block?

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post #10 of 15 (permalink) Old 09-23-2015, 01:27 PM Thread Starter
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This is not a casual project-it has been in R&D and construction for a while. Believe me-it has been suggested many times to install a 5.6 but my goal was a more powerful, period correct(not aluminum) engine that my manual transmission fits to replace the tired 3.5 in my coupe. 4.5 owners might want to follow my route. The 5.6 has its own issues especially since the newest ones are 25+ years old and cannot be rebuilt without custom pistons and very expensive machine work. I remembered someone saying a 5.6 crank would fit a 4.5 block so I began my project and bought a core 4.5 and 5.6 engine to play with. I found the 5.6 crank fit with minor clearancing and my 3.5 flywheel fits. I had the 4.5 block sonic tested to determine if I could bore to 96.5 and found the cylinders walls minimum .25” thick. From there I had the block bored, parallel decked and blueprinted(checking crankshaft bore, etc). I had the 5.6 crank magnafluxed, mic’ed all journals, hardness checked, checked for straightness and micro polished. I had the rods magnafluxed, stress relieved, side beams polished, resized big end, rod bolts checked, balanced. I had to buy 2 5.6 engines to get 8 good “1” size pistons so all the bores would be the same size. My goal is not a “performance’ engine but by default it will have more power due to the displacement and CR increase. This build is not costing any more than a rebuild on the 3.5 would have been-maybe less if it needed pistons. The core engines were not expensive(Pick n Pull 50% off days) I will post about the top end and other specs later since that is another long story.

Tony
280SE 3.5 Coupe
Stick shift
3.27 Axle
5.6 Iron block build in progress

Last edited by 3.5 Tony; 09-23-2015 at 01:35 PM.
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