Did we know?

John Goddard Tue Jun 19, 2012 10:07 am

As above guys did we know the 050 r/c was an 051?
If we did, did we know that the non spi was created by the cylinder being different to
a TeeDee?
Did we know? Pictu162

Left 050 Right 051

microflitedude Tue Jun 19, 2012 11:51 am

So the .050 is really .051 in displacement? There was no .050 cubic inch cylinder?

John Goddard Tue Jun 19, 2012 12:00 pm

For some reason Matt I thought I'd read that it was really an 049.
And we all 'know' that 051 cylinders have a 5 stamped in the
exhaust port don't we.....? Embarassed

I guess these were another exception to the rule cos they don't
got nuffin stamped on them.
It does have a ringed 051 piston though.

Surprised

EXModelEngines Tue Jun 19, 2012 12:56 pm

Displacement wise the 05 and 051 were identical I do believe.

Exhaust ports on the 05, I believe, was .095" while the 051 was .118"

Matt

**RknRusty** Tue Jun 19, 2012 3:28 pm

John Goddard wrote:As above guys did we know the 050 r/c was an 051?
If we did, did we know that the non spi was created by the cylinder being different to
a TeeDee?

Yep and yep.
In all non-slit cylinders, the exhaust port height is how SPI or non-SPI is created. The pistons are the same for their respective displacements.

John Goddard Tue Jun 19, 2012 3:57 pm

Ah didn't know that Rusty.
I thought it was the piston on my 09 R/C.
I'll take a look tomorrow.
Very Happy

**RknRusty** Tue Jun 19, 2012 7:56 pm

Yeah, the piston-sized method of producing SPI was new to the slit cylinders, at least after the Surestarts came on the scene. Probably cheaper than making special cylinders for each application. I wonder if they made all of the pistons the same size and then shaved the ones for SPI applications.

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