Working on a long con rod SL6, using the Wiseco / K1 parts. (3.504 bore)
The piston & rods just went together and we are "fitting" the rings now. (end gap check and file & recheck...)
Here are some photos of our parts... nice stuff, even befroe we did the special prep work.
DD

That's perty!

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'72 4 dr Dart
'63 4 dr Dart

Ya drilled holes in the bottom ring land?????

Looks like he only chamfered the ones in the middle.

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'72 4 dr Dart
'63 4 dr Dart

We did chamfer the two middle oil return holes... only on the "downhill" side.
But there is something else...
DD

Doc,


Those pics bring back memories of a year ago when I was Putting Ruster's engine together.


are you using cast crank K1 rods or forged crank?

What valve size do you intend on running?? I am sure you are aware anything over~1.48 / /1.70 might crate some piston to valve interference as Guzzi Mark and I found out last winter / spring........


Also please enlighten us on the Oil ring supply holes / Chamfers.


Thanks for your time,

Greg

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http://www.youtube.com/hyperpack

Ya cut some off the top of piston,,ya got dirty fingernails???

Looks like .30 off the tops,,,from a year ago memory.

Going to revise that to 100 thousands cut off the pistons.

I like the ringed wrist pin instead of pressed and the skirt coating is nice too.

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'72 4 dr Dart
'63 4 dr Dart

Seeing that we drilled oil "spit" holes into the K1 rods, pointed up & into the pistons, we want to quickly return oil off the lower cylinder wall... so we added chamfer to those lower / inner oil return holes.

And yes... we have a winner...
The piston tops have been cut-down .140
We now have a true "zero deck" engine with this one.
DD

That was $100.00 to the winner right?

Hope you don't melt those shiny new pistons - NA only? 0.140" off is a lot.

Lou

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Home of Slant6-powered fun machines since 1988

The plan is to start-off this motor in N/A configuration with 11 to 1 static CR and go from there... a small shot of spray would be the next step, then more CR if it "lives".
I am most concerned about breaking the top ring land...

I found a "before" photo of this piston, (thanks MS Matt)
The valve notches are now 3 cc's
DD

Slinging too much oil on the cylinder wall may cause intake charge dilution with a low octane fuel. OIL!

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick