diamond 557 a head flat tops

I have a brand new in box set of 4.44 bore 1.25 ch flat top lightweight a head pistons for sale with pins and rings. Going to a dish piston to lower my compression to 11.5.
These were purchased from Lem about this time last year.
900 shipped or trade for 25cc dish piston for same app.

I also have a new spare set of diamond 4.39 1.44ch 39cc dish standard valve relief blower pistons with rings and tool steel pins for sale. Brand new in box. Not original box though. Bought from lem 4 years ago. $800 shipped.



feel free to call or email.
barry. 3605801085
fastbarryracing@yahoo.com

Need to get these sold.    I need some lower compression pistons.

How small is your chamber? My ahead 557 has flattops and it came in between 11.5-12:1 w the 88cc heads.
anyways....I was just curious.

Double post.

My chambers are 73cc. They are early motorsport castings that have been shaved.

These pistons at .040 deck clearance would have worked out to right about 13.3 to 1 in my motor.

That is not any where near what I can make work on pump gas.

Are the blower pistons for a 3.85 stroke or ?

What length rod for these? Before I do any number crunching on compression


Ace

powerstrokeace wrote:What length rod for these? Before I do any number crunching on compression


Ace

they are for a 6.8 rod and a 4.5 stroke.

blown4x4 wrote:Are the blower pistons for a 3.85 stroke or ?

the blower pistons are for a 4.3 stroke w a 6.7 rod.

Sorry about the slow reply. I had been on vacation.

fastbarry wrote:Sorry about the slow reply.  I had been on vacation.

Once i figure out what size chambers i have on my heads i will know more.. trying to get like 14:1. what the ring size? .043/.043 and 3/16? better yet what the job number on these?

Ace

can you get me the job number on the pistons so i can check the final size from diamond. my bore i think is finished out at 4.445

Ace