flex plate

Ed · Post by Ed » Fri May 01, 15 4:18 pm

I have 2 flex plates, one from a cast crank 440, the other from a forged crank 440. Are they interchangeable? The centres look slightly different but other that the same..

Thanks

Cannonball · Post by **Cannonball** » Fri May 01, 15 6:26 pm

Ed wrote:I have 2 flex plates, one from a cast crank 440, the other from a forged crank 440. Are they interchangeable? The centres look slightly different but other that the same..
Thanks

If they are factory originals yes......... if aftermarket No..

autofetish · Post by **autofetish** » Fri May 01, 15 6:47 pm

i got caught out with the torque converter bolts there are 2 different sizes

Ed · Post by Ed » Fri May 01, 15 7:09 pm

Thanks. I'm almost certain they are originals.

JerryL · Post by **JerryL** » Sun May 03, 15 8:16 pm

Should they not be completely different as I was advised for the 383.

The 383 forged crank has a 4 arm plate and the cast crank plate is circular with a small section removed and these are not interchangeable for one or other crank type.

Is it not the same for the 440?

Cannonball · Post by **Cannonball** » Sun May 03, 15 8:45 pm

JerryL wrote:Should they not be completely different as I was advised for the 383.

The 383 forged crank has a 4 arm plate and the cast crank plate is circular with a small section removed and these are not interchangeable for one or other crank type.

Is it not the same for the 440?

NO NO NO NO NO....... Factory are all the same 273 through 440 cept 6 cylinder,,,,, Be told,,,,

DaveBishop · Post by **DaveBishop** » Sun May 03, 15 8:50 pm

Cannonball is right listen to him.

Pete · Post by **Pete** » Sun May 03, 15 8:54 pm

I think 400 is different as it is externally balanced, but stand to be corrected......

Stu · Post by **Stu** » Sun May 03, 15 8:54 pm

Duncan is 100% right. I had this, the \6 is different, all others the same.

Trust your Uncle Cannonball.

Cannonball · Post by **Cannonball** » Sun May 03, 15 11:24 pm

Pete wrote:I think 400 is different as it is externally balanced, but stand to be corrected......

when have you ever seen a mopar spider flex plate with weights on come on pete get on clock,,,,,,,

Pete · Post by **Pete** » Sun May 03, 15 11:29 pm

Well it does not impact on the 383 debate but I think they are materially different , ask Blue.....

Cannonball · Post by **Cannonball** » Sun May 03, 15 11:31 pm

Pete wrote:Well it does not impact on the 383 debate but I think they are materially different , ask Blue.....

Not a chace they are all the same, either small or large thats it,

Pete · Post by **Pete** » Sun May 03, 15 11:36 pm

No worries, I would not use them in the first place - I would always use the B&M style full SFI Flex plates anyway, at least they do not fracture in service..........

Cannonball · Post by **Cannonball** » Mon May 04, 15 1:07 am

Pete wrote:No worries, I would not use them in the first place - I would always use the B&M style full SFI Flex plates anyway, at least they do not fracture in service..........

nothing really wrong with the original chrysler flex plates, problems arise when engines are out of balance, people sit the mtr on them when out of the car and bend them, or bolts left loose and wreck them, they are fine up to around 500hp, it makes sense to use aftermarket but no essential,,,,

latil · Post by **latil** » Mon May 04, 15 1:22 am

Why do Summit list int and ext B&M flexplates?
http://www.summitracing.com/int/search/ ... g-block-rb

Mopar Muscle Association UK

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