ANYONE PLEASE HELP !!! CALL, TEXT, P.M., EMAIL !

813-455-7294
nos10racer@yahoo.com

 

I'll have one on the 4th if that helps....

 

awesome !!!!

 

I have some stock ones, various compressions, but won't be able to get to them until Nov 12.

 

I have some left,sitting in a box,still in rods.

 

my motor is a 1965 10.25 comp motor..... "A" block from a jetstar I

 

If it is the original engine from the JS1, then it is the 10.5 comp engine and has a shallower dish. There were 2 different high compression pistons, 10.25 and 10.50.

Side note: I'm deducing this is where and why Olds came up with the term "Ultra High Compression". With the 10.25 already considered "High Compression", they needed something to call the 10.5.

 

that's cool guess I have 10 more hp I didn't know bout.... lol I am wondering if it was the piston that made the comp difference ? or was it head combustion chamber size or shim gasket size difference ?

 

The piston only. As I said, the 10.50 have shallower pistons.

 

Did you ever find the correct piston? I have some out of a 425 Toro engine; shallow dish, 10.5:1. Thanks, Bob.

 

Epic fail on my part...brought him a 455 piston and rod...not 425 like I thought I was getting...sooo....where in south Florida are ya?? I might be able to be a delivery boy...haha

 

Man, your timing sucks! My son and I were at the Nostalgia Race at Bradenton this past Sunday. I'm over on the East coast, near Ft. Lauderdale. I can press one off and ship it. E-mail me and we can figure something out: drolds1@bellsouth.net. Thanks, Bob.