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Re: 440 Question
[Re: bobs69]
#129665
09/29/08 07:21 PM
09/29/08 07:21 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Or use a weighted flex plate 
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Re: 440 Question
[Re: bobs69]
#129667
09/29/08 07:33 PM
09/29/08 07:33 PM
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Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Quote:
If i change to a steel crank motor will i need to take the weights off the converter.
Yep. Generally...
cast crank = weighted covnerter
forged crank w/ ly rods = non-weighted/neutral balance converter
forged crank w/ 6pack rods = weighted converter
Also in the late 70's there was the odd combo of the cast crank, weighed converter and 6 pack rods. I can only imagine how poorly that would have balanced, but they did it and got away with it.
And keep in mind, if you need a weighted converter, you also need an external balance type balancer. If need a zero balance converter, then you need a zero balance balancer to go along with it. The two have to match and be the same type for the crankshaft you are using.
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Re: 440 Question
[Re: DaytonaTurbo]
#129668
09/29/08 07:40 PM
09/29/08 07:40 PM
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Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
WILD BILL
Senior Member of the Junior Dragster Club
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Senior Member of the Junior Dragster Club
Joined: Dec 2007
Posts: 10,542
BROOK PARK, OH
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Quote:
Also in the late 70's there was the odd combo of the cast crank, weighed converter and 6 pack rods. I can only imagine how poorly that would have balanced, but they did it and got away with it.
Feel free to call me odd then 
You just described my combo to a tee save I have a weighted flexplate and neutral conv.
I'm ok being odd 
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Re: 440 Question
[Re: buildanother]
#129669
09/29/08 07:56 PM
09/29/08 07:56 PM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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Quote:
No weights if you use the LY rods, not big beam six pac type.
Most all cast crank motors used LY rods and had weighted balancer and convertors .
i have a 440 with big rods , forged TRW pistons and it needed very little weight added to NEUTRAL balance it .
YMMV
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Re: 440 Question
[Re: bobs69]
#129671
09/29/08 08:30 PM
09/29/08 08:30 PM
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Joined: Jan 2003
Posts: 75,043
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,043
U.S.S.A.
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Quote:
We got a race car with a cast crank 440 took it out without thinking of looking at the converter. Replaced it with an eagle crank with manley rods 440. If the converter had weights on it am i going to have a vibration?
YES
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