Looking for the phone number of Nissan Motorsports... I am in need of a set of teflon w/pin buttons for my L6 engine. I need to call these guys to see if they have any lying around. I know this is old tech stuff but it will work on my engine. I am putting Z22S pistons and they use a press fit pin. I have the rods already sized and they are floated. I need a set of wrist pin buttons to put the bottom end together. Anyone know where I can order a set of these buttons? Links? Web page? Phone numbers?

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Hi Loren,

My last contact with them was 11-18-02

Nissan North America-Motorsports

745 West Artesia Blvd.

Compton, Ca. 90220

Phone: 310-538-1462

Fax: 310-538-1462

PS

Spence got the pole at Eureka last week end.

I called Nissan and they no longer have the teflon buttons. We will manufacture a set out of aluminum. Thanks for the info. If this were a true racing engine, I would have gotten a set of shorter pins and had the grooves machined into the pistons. I am just going to run this baby on the street so buttons it is!

Loren,

I ran alu. pin buttons on the old Spridget race engins. The only problem I had was on the first set which didn't have enough purchase in the pin bore. I also had them fit in the pin bore with a few thou clearance thinking they would expand. This was not the case and they started to loosen in the pin and I caught it just before disaster struck. The sucsessfull alu. buttons had a .001 press fit, and were hollow ( except for the area that contacted the cyl. wall.)

The press fit didn't effect the pin O.D. as the crush collapsed the hollow button. Then I fit the length to have end clr. of .005. I machined the end of the button the same radius as the bore dia. I tried a smaller radius for less friction area on the bore, but these quickly wore and then had too much end clr. If you have a nice honed pin I.D., a slip fit will work with at least .625 purchase. The Lycoming Aircraft engines use buttons with a slip fit and one inch of purchase in the pin. I patterned mine after these. If you use a slip fit type, be sure to drill a couple of small holes in the fillit between the small and large dia. of the button. this will allow oil to drain out of the pin/button. If you don't do this oil will fill up in the pin, and screw up the balance. Thats one of the reasons I used a pressed/sealed fit. The picture is a Lycoming button I had from my old aircraft days.

Phred

Thanks for the detailed info on the buttons. I will pass this info on to the machinist. I think we will be in business. Old tech still works wonders!