Wiseco Piston and Hybrid Ceramic Bearings from Dominant Saws for 372XP

[jmssaws]

I used to only build popup saws and have only cut the squish band for a couple years and on most saws i can't tell a difference but if your exhaust is 95 stock a popup ain't fixing that. In my motorcycle engine days we used wiesco and never had any problems.

 

[Rev]

Holy good golly, I go out of my way to try and make pistons that look like that...wow..

 

[Rx7man]

Brad, take a video of the saw and analyze the frequency in a sound program.. That's what I've resorted to for now, and it works alright.. 100 hz is 6000 RPM, 200 is 12,000, etc

 

[Moparmyway]

No. My tach doesn't work on this saw.

A wired tach should work (my Hardline tach is wired to mine and works)........... I will see if my TT-20K works on its wire harness if you want

 

[blsnelling]

I used to only build popup saws and have only cut the squish band for a couple years and on most saws i can't tell a difference but if your exhaust is 95 stock a popup ain't fixing that. In my motorcycle engine days we used wiesco and never had any problems.

I cut the squishband on 066/660s.

 

[idiotwithasaw]

Is the dominant logo on the piston on there permanently, or is it a decal that must be removed?

 

[David Young]

Is the dominant logo on the piston on there permanently, or is it a decal that must be removed?

looks like a molybdenum coating that will wear off.

 

[mdavlee]

If say the logo won't last too long after starting it,

 

[idiotwithasaw]

I just thought that since this is essentially a racing piston if it was supposed to serve as a kind of wear gauge. When so much of the logo was gone to replace the piston. Or is it just to be pretty.

 

[Grits & Gravy]

I've ran 60+ mm wiseco's as tight as .0013" on the clearance in air cooled kart engines turning WAY past 15k... But you'd better be vigilant about warmup.

 

[blsnelling]

After more than 5 months, I finally have a test bed for these bearings and Wiseco piston from Dominant Saws. This beautiful 2171 has some pretty cool internals.

This saw lived it's previous life as a rescue saw from Cutters Edge. Unbeknown to me, the PTO side crank seal had badly wallowed out the case, and the crank was damaged as well. I put it back together with a new OEM case and a good used OEM crank. Squish was .037" so the cylinder base was cut .017", netting a final squish of .020". The exhaust port was de-carboned and polished. Otherwise, this saw is 100% stock. Initial compression after the first heat cycle was 152 PSI. After a little run time, and as time permits, I'll be going back in to fully mod this saw. After the first couple heat cycles, the piston looks great, as seen below.

 

[SCHallenger]

 

[Definitive Dave]

Nice

 

[Full Chisel]

That looks cool with the logo showing through the ex. port...those are some nice looking pistons!

You guys are smart...and stuff.

 

[Jon1212]

Dayum! I wish I had the extra coin, I'd offer to buy that saw off of you as it sits.

 

[bwalker]

Brad, what is the weight of the forged Wiseco vs the stock cast piston?

 

[blsnelling]

According to Dominant Saws, they're 7 grams lighter. The newest version is lighter yet.

 

[blsnelling]

Dayum! I wish I had the extra coin, I'd offer to buy that saw off of you as it sits.

I appreciate that. If and when I do sell it, or won't be until after I'm done testing with it. That will include full mods.

 

[Jon1212]

I appreciate that. If and when I do sell it, or won't be until after I'm done testing with it. That will include full mods.

Well heck. Brad we may disagree on some stuff, but I think we can agree on the fact that this saw is one of the best, and not just looking.

 

[Big_Wood]

really cool try out of the wiseco. i'm a little disappointed the base had to be turned though and then even after being turned you only got 152psi out of it. i see more then that on 98% of the 372's i delete the gasket on. will be interesting to see if it goes up some and how it runs. you gonna make a vid for us brad?