Biggest Cube A

[Anonymous-0]

Was wondering what the biggest cube A is out there pulling or whats as big as you can go with an A? What weight classes are they pulling? Thanks just curious.

 

[Anonymous-0]

660 ci is the biggest I have heard of.
4000# all the up to 7000# classes

 

[farmall460ih]

rumor has it there is one that has nearly 1000 cu in .... dont know if it is true or not

 

[Anonymous-0]

Wow, that does sound like a lot for an A. I have heard of some really big G's and 70's around the 1000 cubes. 660 sounds reachable.

 

[Anonymous-0]

a friend of mine has one at 808ci yes you read it right 808!

 

[Mike N Mo]

One in S.D. that's 808 if I remember right (7X10.5).
Mid 600's is becoming much more common (6.75X9). Mike

 

[Anonymous-0]

Mike could you send me your e-mail address to [email protected]. Thanks, Ricky

 

[Big Jugs]

662....and it's for sale...cheap!

 

[CJ_1080]

A late JD A with a powerblock and no stroke mods is around 400 ci.

 

[79fordblake]

How big can you go with an A before it starts falling apart and not reliable? 600-700ci?

 

[Mike N Mo]

The biggest concern with reliability is the crankshaft. At that bore size, you want a 3" or bigger crankpin. If you use a Murphy's block, you should have no problems with the block/sleeves. If you use a re-sleeved stock block or powerblock, you'll likely have problems with bore concentricity (thin sleeves) and water leaks. You'll also have problems with cracks because there isn't a lot of material left at key spots due to the large bore. I've had both types of large bore blocks, and the resleeved one is just a boat anchor now. Mike

 

[Mike N Mo]

Mail was sent 8/22. Did you get it?? Mike