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Pistons

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flathead46

Posts: 7

Joined: Wed Jul 01, 2009 8:48 am

Post Thu Jul 09, 2009 11:39 am

Pistons

Has anyone ever tried Briggs and Stratton pistons in a flattie. I removed one from a 10 hp riding mower, miked it, stuck it in a 13 fin jug, looks like it would work in a stroker with the deck height. In the briggs engine, it is running in an aluminum cylinder (no liner) with steel rings. From my calculations, stroke would be about 4 7/8. Whadja think?
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panic

Post Thu Jul 09, 2009 1:05 pm

Re: Pistons

Why do I bother to ask questions, when no one reads anything?
Last edited by panic on Fri Jul 10, 2009 9:11 am, edited 1 time in total.
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RUBONE

Posts: 380

Joined: Fri Nov 30, 2007 7:24 pm

Post Thu Jul 09, 2009 10:00 pm

Re: Pistons

Why bother when U pistons are available??
Robbie
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Frankenstein

User avatar

Posts: 1541

Joined: Thu Jun 27, 2002 12:01 am

Location: Interlaken, NY USA

Post Fri Jul 10, 2009 6:19 am

Re: Pistons

Having built a couple of BT strokers, I know I stopped at 4.5" stroke because of the difficulty of coming up with a stroker piston for longer strokes. I Might have gone further if I'd known the Briggs would work. Ah, the road not taken.(The faster road not taken)
DD
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flathead46

Posts: 7

Joined: Wed Jul 01, 2009 8:48 am

Post Fri Jul 10, 2009 1:43 pm

Re: Pistons

I forgot to mention that the wrist pins were the same as Corvair, with easy circlips to install. Why use these rather than aftermarket Jap or Chink recycled Alpo cans? PRICE QUALITY, etc. As easy to install as Keith Black Corvairs. I have no idea on how piston to wall clearance should be set up. Eventually, I'm going to try them, so I guess my motor will be the Guinea Pig if no one beats me to it.
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flathead46

Posts: 7

Joined: Wed Jul 01, 2009 8:48 am

Post Fri Jul 10, 2009 1:49 pm

Re: Pistons

Frankenstein wrote:Having built a couple of BT strokers, I know I stopped at 4.5" stroke because of the difficulty of coming up with a stroker piston for longer strokes. I Might have gone further if I'd known the Briggs would work. Ah, the road not taken.(The faster road not taken)
DD

Evo (3.5 060 over ULH) Corvair, etc is all I have dealt with, as far as pistons for the big 80 go. What have you tried?
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flathead46

Posts: 7

Joined: Wed Jul 01, 2009 8:48 am

Post Fri Jul 10, 2009 1:51 pm

Re: Pistons

panic wrote:Why do I bother to ask questions, when no one reads anything?

Please explain. I'm kinda dumb, living in a garage full of motorcycles
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Sidewinder

Posts: 89

Joined: Tue Dec 25, 2007 4:04 pm

Location: Norway

Post Sun Jul 12, 2009 2:21 am

Re: Pistons

Can you messure bore, compression height and piston pin diameter for this B&S-piston? And engine type/serial-number might be useful.

VW 1600cc piston might work for someone too. Bore 85.5mm, compression height 39.4mm and piston pin diameter 22mm. Availiable in both cast and forged for very reasonable money.

Never mind the panic!
Torstein
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charlie

Posts: 197

Joined: Wed Dec 22, 2004 1:01 am

Location: Bucktown, PA

Post Sat Sep 05, 2009 9:23 pm

Re: Pistons

I have some standard bore NOS ULH Pistons if that would help.

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