My Pistons Let Me Show You them.

[delatlanta1281]

Yummy no?





Custom made 3d cut and blueprinted by the best.
Some dude in Kansas.
Cannot wait to bring them and my block to my machine shop.

[5Toes]

Who these made by..?

[delatlanta1281]

Imagineering.......

[gearheadE30]

Nice! Specs?

[delatlanta1281]

Specs
10.5-1
Bore size = 85mm
Stroke = 81mm
Rod Length = 135mm
Comp. Dist. 30.81mm
Ring Grooves
Top = 1mm
Second = 1.2mm
Oil 2.8mm

Napier Second ring.

[Pl3wA]

low comp? i was going to spend like 2k on pistons, rods, and bearings. but i said fuck it and bought some studs and a headgasket

[delatlanta1281]

low comp? i was going to spend like 2k on pistons, rods, and bearings. but i said fuck it and bought some studs and a headgasket

Not sure I understand what you are getting at.

[acolella76]

Not sure I understand what you are getting at.

Boost is what he's getting at :) Cool progress Rich... I love me some custom pistons ;O

[thepoloplaya]

The workmanship on those are insane! Whats the rest of the plans for the motor?

[10Toes]

Kinda small

[delatlanta1281]

Ahh, I didn't read between the lines Alex!
As far as the buiild, it's going to bore most people here, and tons of questions regarding my balls/ judgement will come up.
It's a mild stroker build that will have good torque and will prove to be fun to putter around in ;) Nothing that hasn't been done for years and years, just great materials in a fun package.

[delatlanta1281]

Kinda small

Correct.
Here we go.

[AndrewBird]

It's weird how they stripped in the dish instead of just running a bullnose endmill around the inside to create the radius. Would have created a much smoother finish and taken a LOT less time. Unless the bottom of the dish is curved or something. Hard to tell from the pictures.

[delatlanta1281]

It's weird how they stripped in the dish instead of just running a bullnose endmill around the inside to create the radius. Would have created a much smoother finish and taken a LOT less time. Unless the bottom of the dish is curved or something. Hard to tell from the pictures.

The pattern on the top of the piston is something the piston builder has been toying around with to seperate his pistons from other piston makers in the BMW community, his cutting process is different I think. I can't remember why he did it, it was explained to me, but there is a reason.

[Farbin Kaiber]

Turbulence? Cut down on hot spots? Change flame front propagation?