Author Topic: Crankshaft  (Read 1639 times)

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Offline Haganracer88

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Crankshaft
« on: January 06, 2015, 11:12:27 PM »
Is there anyone who makes a billet crank or billet or brass counter weights for a 390?


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Offline SILVERDEVIL

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Re: Crankshaft
« Reply #1 on: January 07, 2015, 12:27:58 AM »
http://www.parsonsracingengines.com/ This place has a balanced rotating assembly. works great
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Offline Darkviper

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Re: Crankshaft
« Reply #2 on: January 07, 2015, 12:43:18 AM »
You can run balancer in it which works good under 7500 rpms. Parsons racing sells one with it balanced and everything. I got my balanced but you have to find someone who has small enough harness to balance a stock on cause its smaller then a brigs. So if you find like kart racing builder who balances cranks can do it.
Jonathon Kaup
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Offline George Herrin

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Re: Crankshaft
« Reply #3 on: January 07, 2015, 05:25:57 AM »
You can spin the balancer 8400 no problems. We run the stock crank and balancer in all our motors.Everyyear its run at the AAMC its qualified in the top five to 3rd overall including the twins time wise. Just saying.
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Offline Darkviper

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Re: Crankshaft
« Reply #4 on: January 07, 2015, 05:31:09 AM »
Oh ok I saw your old post a remember it said 7500 rpms. I'm glade you can spin it higher with a balancer in it cause I paided alot of money to have it balanced.
Jonathon Kaup
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Offline George Herrin

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Re: Crankshaft
« Reply #5 on: January 07, 2015, 05:32:55 AM »
We used to go by 7500 but when ya need more speed you go for it. Last season we spun it anywhere frpm 78 to 84 all year with no problems.
George Herrin #6
Indian Power.. You gotta Go big to beat em or Go HOME
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My other racer is a 1/5th scale Dirt Late Model!!!!

Offline Darkviper

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Re: Crankshaft
« Reply #6 on: January 07, 2015, 05:36:17 AM »
Thanks again George I know IV been babying mine at 6400 with it balanced. I'm getting new rings all stuff done right this year and turn rpms up for sure.
Jonathon Kaup
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