Posted By: bobs69
440 Question - 09/29/08 11:12 PM
On a 440 with a cast crank will i need weights on the converter?
440 Question
Posted By: DaytonaTurbo
Re: 440 Question - 09/29/08 11:14 PM
Yes.
Posted By: bobs69
Re: 440 Question - 09/29/08 11:18 PM
If i change to a steel crank motor will i need to take the weights off the converter.
Posted By: WILD BILL
Re: 440 Question - 09/29/08 11:21 PM
Or use a weighted flex plate 
Posted By: buildanother
Re: 440 Question - 09/29/08 11:21 PM
No weights if you use the LY rods, not big beam six pac type.
Posted By: DaytonaTurbo
Re: 440 Question - 09/29/08 11:33 PM
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.
Posted By: WILD BILL
Re: 440 Question - 09/29/08 11:40 PM
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
Posted By: JohnRR
Re: 440 Question - 09/29/08 11:56 PM
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
Posted By: bobs69
Re: 440 Question - 09/30/08 12:29 AM
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?
Posted By: JohnRR
Re: 440 Question - 09/30/08 12:30 AM
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