Which brand gasket do you use that is 0.051? Cosworth?

 

So... if you were to do a dry sump setup, you would spec out the engine internals with that in mind (ie: gas ports and low tension springs)? Do any manufacturers offer low tension springs and the gas ports for their pistons and are readily available?

 

I have received mine, this is the latest Asymetric Evo pistons

 

Not that I'm aware of for the 4G63. Chevy V8s, yeah, you can pretty much order anything you want and its shelf-stock somewhere. You can probably spec out a low tension ring package on these pistons though.

Something I'm curious about though on the gas ports. There are a few threads on speedtalk and guys report the vertical ports will actually fill up with soot in a matter of a handful of drag runs, making them useless very quickly. They also report high ring wear rates though with even just a handful of runs. It basically shows that the ports are doing exactly what they are supposed to, force that ring firmly into the cylinder wall, but it shows they are meant for full out competition drag engines that get tore down after every event.

Anybody run vertical gas ports on a 4G63 have similar experiences?

The horizontal ports on the other hand are reported as being used by road race guys with great results. They also notice higher ring wear rates, but nothing like the vertical port drag guys.

 

cometic

 

So far (knock on wood) we havent seen any issues with them. No excessive smoke or seeming negatives.

 

wiseco evo asymetric 2013 model is 336gram , normal wiseco is 348gram , the HD is 350gram , all without pins, all are 86mm

 

We just build a 2.0 long rod using the -10cc asymmetric pistons off the shlef now, std bore.

The 4 thou PTW clearance was indeed set at the piston skirt for a brand new block

 

Can the k667m855ap be used on the Evo1-3/Eclipse 7-bolt 2.gen engine?(100 mm crank and 150 mm rods) Reason I ask is because the intake- and exhaustvalves are on the opposite side vs the Evo 4-8.

Thanks

 

Aaron- So if I wanted to do a 2.2L 4g63, I'd need the 153 rods? How much are those? And then what size piston. 9:1
And this would be a 94mm crank, right?
Thanks,
Fred

 

Nop they cant be used, I have already got a set , it has opposite orientation for the valve reliefs. The pistons are also not symmetrical thus u cant rotate it.

 

Ok thanks.