speed pro hyper piston orientation

rubberweasel · Post by **rubberweasel** » Sun Aug 30, 2015 7:05 pm

I have some stock type 454 speed pro hyper pistons, the instruction were missing, which way does the dot on the piston face when installing them in the block. Thank you.

Wolfplace · Post by **Wolfplace** » Sun Aug 30, 2015 7:13 pm

Forward

rubberweasel · Post by **rubberweasel** » Sun Aug 30, 2015 10:37 pm

That's how I have them in, but the part number that is etched on the tops of the piston was upside down on one side of the engine. So I was confused. Thanks you!

machinedave · Post by **machinedave** » Mon Aug 31, 2015 12:29 am

I have seen the part number upside down many times but the dot, notch or arrow is always facing the front.

pdq67 · Post by **pdq67** » Mon Aug 31, 2015 7:01 am

Unless you are "old-school" and turn the .060" pin offset backwards like I did in my old junk301.

My Machinist told me too. He said it would help the crank push, but that my pistons would rattle some until warmed up which they did. No problem.

Just make sure the valve notches/domes still fit OK is all.

pdq67

rfoll · Post by **rfoll** » Mon Aug 31, 2015 12:07 pm

I would take a wild guess that the dome on a BBC would make this idea troublesome.

Don Terrill’s Speed-Talk

speed pro hyper piston orientation

speed pro hyper piston orientation

Re: speed pro hyper piston orientation

Re: speed pro hyper piston orientation

Re: speed pro hyper piston orientation

Re: speed pro hyper piston orientation

Re: speed pro hyper piston orientation