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 Post subject: engine mods
PostPosted: Sun Apr 24, 2005 3:46 pm 
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3 Deuce Weber

Joined: Mon Apr 04, 2005 5:28 pm
Posts: 52
Location: Vernon,WI
Car Model: 1966 Plymouth Valiant
i am wondering if anyone has tried turning down the counter weights on a
forged crank and if so where there any balancing problems???

also are there any aftermarket balancers availible????can a small or big block balancer be modified to work????

has anyone ever used olds valves it looks like with a lash cap they will be the correct lenght and i can turn the head size down to what i need.

any help would be greatly apreciated

thanks vitamindart


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 Post subject:
PostPosted: Sun Apr 24, 2005 5:45 pm 
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SL6 Racer & Moderator
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Joined: Sat Oct 19, 2002 12:06 pm
Posts: 8987
Location: Silver Springs, Fl.
Car Model:
Some people have lightend slant cranks. Doug had some pictures posted someware, but I couldn't find them. Fisher has a balencer for the slant. Also a big block balencer can be used with some minor modifications, but the pulleys do not line up. Have no idea on the valves.

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 Post subject:
PostPosted: Sun Apr 24, 2005 7:50 pm 
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Board Sponsor & Moderator
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Joined: Thu Oct 17, 2002 7:27 pm
Posts: 14777
Location: Park Forest, Illinoisy
Car Model: 68 Valiant
I overheard Doug explaing about the crank lighteneing out in Vegas. IIRC, when the bob weights are cut, Mallory metal has to be added making the entire process a wash.

As far as valves go, Ferrea is making a drop-in Slant valve now that is relatively low cost. (or so I've been told) :shock:

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 Post subject:
PostPosted: Mon Apr 25, 2005 4:53 am 
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Joined: Thu Oct 17, 2002 9:45 am
Posts: 1120
Location: NC
Car Model:
Answer this question - Why did the factory put the large counter weights on the crank to begin with?

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 Post subject:
PostPosted: Mon Apr 25, 2005 4:36 pm 
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SL6 Racer

Joined: Sun Nov 10, 2002 8:49 pm
Posts: 125
Location: Longview Washington
Car Model:
I removed 10 pounds from a stock weight crankshaft. THAN I took it to the machine shop and they rebalanced the shaft. This was after the poor guy spend serveral ??? hours TRYING to rebalance it. When I picked up the crank he asked me if this was a running engine because he had never seen a crank so far out of balance.....so I just played dumb and said I didn't have any history of that crank. Well it has been in my car for 2 years now with no problems. It was worth it BUT it was also lots of work and money. As far as damper I just use a big block and change the front seal.

Dave M


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 Post subject:
PostPosted: Mon Apr 25, 2005 6:54 pm 
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 17350
Location: Blacksburg, VA
Car Model:
Also, the later cast crank motors have much lighter cranks, apparently. The 80s ones supposedly only weigh about 55-60 lbs. I believe this is what Rodney has had in the Lancer for the last 3-5 yrs of drags w/ no issues.

Lou

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