Piston rings or SPI piston ring set

S

SJORMK7

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Nov 27, 2007

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Hayden Idaho

• May 24, 2011

• #1

I have a 06 SummitX 800H.O.
The sled has 2600 miles on it, I am going to replace the stock rings. Or should I use Spi pistons,rings,pin,wrist pin assembly? What do you guys think are the stock pistons worthy of just rings?, or should I go the SPI route ? Thanks for the input

 

t30mg

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May 8, 2010

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Brush Prairie Wa

• May 25, 2011

• #2

I personally would not use SPI pistons. I know lots of people use them, but there is a reason they are the cheapest piston on the market. I have seen more than 1 cylinder that was seized do to excessive expansion with an SPI.

I personally use dual ring MCB piston kits from Matt at MCB performance in all of my rebuilds. His service and parts quality is great.

I have used his pistons many times with my sleds and have great luck with them. Plus the advantages of the dual ring pistons will give you better performance in the long pulls over the the stock pistons that cost more.

 

M

mastertech

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Cambridge/McCall Id.

www.snowestonline.com

• May 25, 2011

• #3

www.sledheadracing.net

Get the dual ring pistons from BigJohn.. One of the best in the business! I would ditch the stockers and deffinetly not go with SPI. Good Luck!

 

t30mg

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• May 25, 2011

• #4

I believe I have read several times that BJ's piston of choice is also the MCB dual ring also.

 

M

mastertech

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Mar 24, 2009

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www.snowestonline.com

• May 25, 2011

• #5

I believe your correct.. If you want great customer support, Buy them threw BJ..

 

S

SJORMK7

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Nov 27, 2007

81

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Hayden Idaho

• May 25, 2011

• #6

Would keeping the stock pistons and getting new rings be better then getting new spi pistons? Thanks

 

eddy

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• May 25, 2011

• #7

Rings

If the stock pistons are spec'ed to be within tolerance: then replacing the rings with OEM is acceptable practice. You most likely have about 130 hours on those pistons, so they are about 60% done. If you plan on tearing the motor down again in 1500 miles or so from now then just rings would be an OK call. If you want the longest life: the MCB dual ring set up would be a very good choice.