B&M Flex-plate

[sdcbowler]

Looking for some advice here. I purchased this flex-plate many years ago for my engine (426 wedge, 440 cast crank, 6-bolts, damper number 3577785 [USE WITH 440 CAST CRANK ONLY], externally balanced, no weights on the converter. Should I grind of the weight welded onto the flex-plate, or leave it? I have no idea.

Thanks

 

[Chryco Psycho]

Looks modified as a custom balance for 1 particular engine , the B&M plates are not delivered new like this

 

[sdcbowler]

OK. That makes perfect sense to me. Please allow me to phase the question another way. Consider the specs I mentioned, if I were to purchase the identical plate, would I have to add any weights to it, or could I install it right out the box?

 

[Chryco Psycho]

Hard to know , did the engine vibrate with that flex plate before ?
You have a unique combo with a 426 W & cast 440 crank so the pistons should be lighter than 440 & you could have LY or 6 pack rods in there which will affect balance also .
If the engine was balanced with that plate when built it needs it .
Why do you want to replace it ?

 

[sdcbowler]

The engine came with a stock flexplate. I wanted to upgrade so I got this one. I went to the B&M website where I found about 12 others who asked the same question. Based on the specs of my engine and torque converter, I discovered that I can use this flexplate. I just have to grind the weight off, which I did today. Also, the original plate and converter did not have any weights added so I should be good to go.

Chryco, thanks much for you assistance.

 

[340challconvert]

I had a similar problem to solve. I am pulling a 1970 small block 340 and installing a 360 non-magnum while I work on the 340. The 340 is internally balanced w no need for the flex plate or weighted torque converter. I bought a flex plate that is weighted to be used with the 360 along with the proper dampener. I will use the original torque converter (non-weighted).

I would just buy the proper flex plate for your application IMO

 

[heminut]

I would just buy the proper flex plate for your application IMO

His application is unique, to quote Chryco Psycho;

"You have a unique combo with a 426 W & cast 440 crank so the pistons should be lighter than 440 & you could have LY or 6 pack rods in there which will affect balance also."