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451 piston #1503292
09/17/13 08:09 PM 09/17/13 08:09 PM
Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
ccdave Offline OP
The Ultimate
ccdave  Offline OP
The Ultimate

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Do all 451 stroker pistons used with a 440 rod have the oil control ring partially into the wrist pin hole??
Re: 451 piston [Re: ccdave] #1503293
09/17/13 09:04 PM 09/17/13 09:04 PM
Joined: Jan 2007
Posts: 7,664
IN
A
ahy Offline
master
ahy  Offline
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IN
The 451 (3.75 stroke, 6.76 rod) usually runs about 1.3" compression height. Typically no oil support ring is required.

With 4.125 stroke different story... the ring is in the pin area and a ring support is needed.
Re: 451 piston [Re: ccdave] #1503294
09/17/13 09:13 PM 09/17/13 09:13 PM
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
R
RapidRobert Offline
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My KB 280's (400 block/6.76 rods/440 crank) are that way but I'm not anticipating an issue from that (not together yet)

live every 24 hour block of time like it's your last day on earth
Re: 451 piston [Re: ahy] #1503295
09/17/13 09:15 PM 09/17/13 09:15 PM
Joined: Oct 2005
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WI
Dcuda69 Offline
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w/ahy I have a 3.900 400 block with 6.760 rods and 1.270 comp.height and the pin is not in the ring. Call Diamond piston...they will hook you up with some beautiful pieces

Last edited by Dcuda69; 09/17/13 09:16 PM.
Re: 451 piston [Re: Dcuda69] #1503296
09/17/13 09:21 PM 09/17/13 09:21 PM
Joined: Jan 2007
Posts: 7,664
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ahy Offline
master
ahy  Offline
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Here is Ross. The * denotes oil support rail... 3.9 and 4.15 stroke only.

I run Ross with 4.15 stroke and they do have the rail. I've had no problems with over 10k miles. These are forged. Maybe with the hypers the ring pack needs to be a little lower thus the rail.


http://www.rosspistons.com/products/#cid=7&acc_id=0&type_id=2&vehicle_id=42
Re: 451 piston [Re: ccdave] #1503297
09/17/13 09:35 PM 09/17/13 09:35 PM
Joined: Jan 2003
Posts: 75,136
A Banana Republic near you.
JohnRR Offline
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JohnRR  Offline
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Quote:

Do all 451 stroker pistons used with a 440 rod have the oil control ring partially into the wrist pin hole??



Depends on the piston , A KB hyper , as RR has , has a wide ring spacing between the top and second ring , couple that with a Chrysler pin of 1.09 and you can have a pin in the oil rings . Use a piston with a .990 pin and you shouldn't have an issue.

FYI the same piston , 1.320 CH is used for with a 3.75 stroke , 3.9 stroke and 4.25 stroke low deck, just use a piston with a .990 pin and chose the correct rod length.
Re: 451 piston [Re: JohnRR] #1503298
09/17/13 11:39 PM 09/17/13 11:39 PM
Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
ccdave Offline OP
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ccdave  Offline OP
The Ultimate

Joined: Jan 2003
Posts: 1,807
Mopar Country, Mi
Thanks guys


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