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WHAT PISTON ARE THESE?? #1279624 08/05/12 12:56 AM 08/05/12 12:56 AM
Joined: Jan 2007 Posts: 136 AZ, USA moon OP member
moon OP member Joined: Jan 2007 Posts: 136 AZ, USA	Ive had these pistons for about 10yrs, some guy gave them to me. He said they were for a 440, there is no name on them. Just says .040 over. Inside there are 2 marking an arrow on one side and a triangle with a - on the other. There are 4 valve notches and a 1/4 of it is raised up higher. They measure about 4 5/16. Is there anyway to figure out what kind they are? 7322269-pis.jpg (80 downloads)

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279625 08/05/12 12:58 AM 08/05/12 12:58 AM
Joined: Jan 2007 Posts: 136 AZ, USA moon OP member
moon OP member Joined: Jan 2007 Posts: 136 AZ, USA	2nd pic 7322271-pis2.jpg (81 downloads)

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279626 08/05/12 12:59 AM 08/05/12 12:59 AM
Joined: Jan 2007 Posts: 136 AZ, USA moon OP member
moon OP member Joined: Jan 2007 Posts: 136 AZ, USA	3rd pic 7322273-pis3.jpg (71 downloads)

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279627 08/05/12 01:00 AM 08/05/12 01:00 AM
Joined: Jan 2007 Posts: 136 AZ, USA moon OP member
moon OP member Joined: Jan 2007 Posts: 136 AZ, USA	4th pic 7322274-pis5.jpg (75 downloads)

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279628 08/05/12 07:09 AM 08/05/12 07:09 AM
Joined: Jan 2003 Posts: 1,795 Greer, SC TooMany62s top fuel
TooMany62s top fuel Joined: Jan 2003 Posts: 1,795 Greer, SC	Besides the .040 there appears to be some numbers on the top. What are those numbers?

Re: WHAT PISTON ARE THESE?? [Re: TooMany62s] #1279629 08/05/12 07:22 AM 08/05/12 07:22 AM
Joined: Nov 2003 Posts: 915 Cincinnati OH B Bishop super stock
Bishop super stock B Joined: Nov 2003 Posts: 915 Cincinnati OH	To me they look like a 440 6PAK piston cut down

Re: WHAT PISTON ARE THESE?? [Re: Bishop] #1279630 08/05/12 10:35 AM 08/05/12 10:35 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	They do don't they??

Re: WHAT PISTON ARE THESE?? [Re: Dodgem] #1279631 08/05/12 12:19 PM 08/05/12 12:19 PM
Joined: Jan 2003 Posts: 75,043 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,043 U.S.S.A.	Quote: They do don't they?? X3 someone flycut the top of that piston.

Re: WHAT PISTON ARE THESE?? [Re: JohnRR] #1279632 08/05/12 12:45 PM 08/05/12 12:45 PM
Joined: Jun 2008 Posts: 3,916 usa L lewtot184 master
lewtot184 master L Joined: Jun 2008 Posts: 3,916 usa	they look like a '70 six pak piston that has been milled to reduce compression but still have a quench pad for closed chamber heads. the first time i've heard of this was edelbrock doing it on a dyno mule engine. probably would work fine on an 84cc or 74cc edelbrock head. i wouldn't be afraid to use them. measure the cut and you can come close to calculating a compression ratio.

Re: WHAT PISTON ARE THESE?? [Re: lewtot184] #1279633 08/05/12 01:53 PM 08/05/12 01:53 PM
Joined: Jan 2007 Posts: 136 AZ, USA moon OP member
moon OP member Joined: Jan 2007 Posts: 136 AZ, USA	Here's a pic with the letters 7322897-2012-08-0509.50.53.jpg (58 downloads)

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279634 08/05/12 02:53 PM 08/05/12 02:53 PM
Joined: Jan 2003 Posts: 75,043 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,043 U.S.S.A.	Quote: Here's a pic with the letters The LH I'll ASSuME is LEFT HAND , that would be on 4 pistons , 4 should have RH , unless it was milled off . Not to come off like an [Edited by Moparts - Family Friendly Site - Keep it clean] but using a dial or digital caliper can you measure the piston diameter, the height from the top of the pin bore to the top of the piston and the depth of that step? That will help determine what the piston is instead of a just a picture and a measurement using what I assume was a 25ft tape measure?

Re: WHAT PISTON ARE THESE?? [Re: moon] #1279635 08/05/12 03:06 PM 08/05/12 03:06 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	It does look like someone spent too much time making a set of ashtrays. They made a 9.5 compression piston into a 8-1 piston. At least they are a little better weight now. Sheldon

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