Diamond custom NOS SBC pistons

[Scott @ DLS]

Specs as follows,
Bore 4.160
Compression Height 1.068
Effective Volume 11CC
Valve Depth Intake .318 Exhaust .222
Top ring .043
2nd ring 1/16
Oil ring 3/16 support rail 01-9000-155
Lock ring Spiro
Lock ring PN 01-5104
Wrist pin dia. .927 Wrist pin lenght 2.750
Piston weight 497 grams

7 are used and 2 are brand new, I broke #8 piston not sure why since I only had 11 motor passes and 8 NOS passes on these set on 300 and a digital window switch. NOS on at 4000 and off at 7600 RPM. With my 63.6cc heads we were running 14.61 compression. Other motor specs, 3.875 stroke, cyclinders measure 4.160, pistons measure 4.155, ran Child and Alberts tool steel rings, also ran a .040 MLS Cometic head gaskets. Pistons are glass bead blasted to round off and sharpe edges. If you have any other questions please PM me.

Asking $650.00, paid $1100.00 thru Dynamic Speed and Marine, that I will never use again!

Scott K.
586-630-1098

 

[milfordfab]

I could use them but new Wiesco's that are 440 grams are $92 each and I got 4 sets of pins. Wiesco's work good and ride only on the skirt. I had a set of JE's that ride on the skirt and #2 ring land and the ring lands failed real fast. Don't know how the Diamonds are designed. The problem is 1.068 is not enough to make a good piston. I went to a 5.85 rod and fattened up the ring lands, no issues now. They are worth 4200 to me for a low powered street engine, no insult intended..........

 

[milfordfab]

Also if you blasted the ring lands the rings will not seal under load and the pistons are general considered worthless.

 

[Scott @ DLS]

I ran 8.93 at 155mph on a set of off the shelf pistons with 2 stages for 2 seasons. Glass beading is only on the top and not into the ring lands. Pistons are also radial ported.


Going on Ebay in 2 days if no interest!

 

[sonic z]

Also if you blasted the ring lands the rings will not seal under load and the pistons are general considered worthless.

Dude,why would you post shit like this???:shake:

 

[Scott @ DLS]

Me thinks he was just to over analizing and typing out loud!