Best Piston ring alignment /orientation for a blown motor

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prostude
Posts: 46
Joined: Mon Apr 26, 2010 11:16 am
Location: Syracuse NY

Best Piston ring alignment /orientation for a blown motor

#1 Post by prostude » Tue Aug 31, 2010 7:22 am

I usually follow gms recomendations but it seems if you ask 20 different people you get 20 different answers on the best alignment of ring gaps.

what do you recomend on a blown application
Top ring up second ring down
top oil rail to the front second oil rail to the back exapander ?


some say not to put gaps up and down or side to side?
Street car Old motor 10.80 @122 1.49 60' 355 6-71 stock gm heads stock rocker arms block hugger headers 1-5/8"x2.5" collector
the car ran in the 9's in the 60's with an olds motor.

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Moparious Maximus
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Joined: Mon Oct 05, 2009 6:05 pm
Location: Iowa

Re: Best Piston ring alignment /orientation for a blown moto

#2 Post by Moparious Maximus » Tue Aug 31, 2010 8:57 am

Thats what we do.

Top ring to towards the valley, second ring 180 degrees from it. Oil rings are inline with the pins 180 apart.

We've done it like that since I can remember, on all our motors. Personally I dont think its a big deal where they are but I do think the 180 apart is best, just so they have a hard time migrating towards each other. They will move around.
'63 Plymouth, Straight axle, Leaf springs, Drum brakes, 31x10.5wx15 Rears 3215lbs
Best time to date 7.99 @ 170 mph
572" Wedge 8-71 @ 28% OD, ALKY, Glide, Dana

http://www.youtube.com/watch?v=vq-xzFWHtFk
http://www.youtube.com/watch?v=JfyZSw59R_o

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prostude
Posts: 46
Joined: Mon Apr 26, 2010 11:16 am
Location: Syracuse NY

Re: Best Piston ring alignment /orientation for a blown moto

#3 Post by prostude » Tue Aug 31, 2010 9:28 am

Moparious Maximus wrote:Thats what we do.

Top ring to towards the valley, second ring 180 degrees from it. Oil rings are inline with the pins 180 apart.

We've done it like that since I can remember, on all our motors. Personally I dont think its a big deal where they are but I do think the 180 apart is best, just so they have a hard time migrating towards each other. They will move around.
thanks for the info how about the oil ring spacer gap
How about the theory of NOT aligning them up where the piston thrust area is which I believe is up and down

thanks in advance
Street car Old motor 10.80 @122 1.49 60' 355 6-71 stock gm heads stock rocker arms block hugger headers 1-5/8"x2.5" collector
the car ran in the 9's in the 60's with an olds motor.

User avatar
Moparious Maximus
Posts: 125
Joined: Mon Oct 05, 2009 6:05 pm
Location: Iowa

Re: Best Piston ring alignment /orientation for a blown moto

#4 Post by Moparious Maximus » Tue Aug 31, 2010 1:38 pm

That thrust area theory might have some merit in a blower motor, they sure are hard on skirts, that could beat up rings too I guess.

About the oil seperating ring, I dont even pay attention to it, doesnt matter where it is, thats only my opinion of course someone else might have other ideas.
'63 Plymouth, Straight axle, Leaf springs, Drum brakes, 31x10.5wx15 Rears 3215lbs
Best time to date 7.99 @ 170 mph
572" Wedge 8-71 @ 28% OD, ALKY, Glide, Dana

http://www.youtube.com/watch?v=vq-xzFWHtFk
http://www.youtube.com/watch?v=JfyZSw59R_o

User avatar
prostude
Posts: 46
Joined: Mon Apr 26, 2010 11:16 am
Location: Syracuse NY

Re: Best Piston ring alignment /orientation for a blown moto

#5 Post by prostude » Wed Sep 01, 2010 9:03 am

just curious anyone else out there putting the rings in any different way for any reason
Street car Old motor 10.80 @122 1.49 60' 355 6-71 stock gm heads stock rocker arms block hugger headers 1-5/8"x2.5" collector
the car ran in the 9's in the 60's with an olds motor.

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