• I've received emails and PM's asking me about "Group Buys" and promotions.

    A Group Buy here on SnoWestOnline.com would be a situation where a normal member (non vendor or mfg) personally collects orders from other members. That member then uses those orders to negotiate a better price with the Vendor/Mfg for HIS/HER "Group" of buyers.

    Here is an example of a viable "Group Buy"

    http://www.snowestonline.com/forum/showthread.php?t=269222

    A promotion that has the words "Group Buy" in the title is still a promotion, and from the rules that were handed down to me by Harris Publications is that non-advertisers cannot run promotions or open sales programs on the forums outside of the swapmeet.

    If a members wants to become a group buy manager, maintain a thread and collect the funds and negotiate a group buy... as a member, you are welcome to do that as long as you are not attached to the business of the vendor or Mfg.

    If you are a vendor/MFG and you want to offer an EXCLUSIVE "SnoWestOnline ONLY" promotion that is exclusive to snowest readers, please contact me and you'll be able to put it up in the Polaris forums.

    Also, before any vendors/mfgs get all "riled up" over this know that the moderators are strictly volunteers and do not receive a dime from any advertising $$ spent on this site.

    As ALWAYS, since DAY ONE of me becoming a moderator, I have pioneered, supported and encouraged vendors and mfgs in getting the word out to our readers with "New Product Announcements.

    Have a great season.

    From this point on, all vendors/mfg's promoting Pre-Season tiered sales programs, in the Polaris Forums, that are not paid advertisers will be appropriately moved to the swapmeet section of the forums.

    MH

Spi Axys pistons

ADDIE

Well-known member
Premium Member
Nov 14, 2013
61
133
33
Chinese Pistons (SPI) = Chinese Quality.

USA Pistons = USA Quality

Saving a few bucks is not worth the risk IMO.. Your opinion may differ.. But having an engine failure in the backcountry due to Chinese parts will cost you a lot more in the end.
Like anything made in China... some last some do not...

IMO< best option is to never skimp on internal engine components..
 

Indy_500

Well-known member
Lifetime Membership
Jul 9, 2011
1,009
441
83
24
Hortonville, WI
Chinese Pistons (SPI) = Chinese Quality.

USA Pistons = USA Quality

Saving a few bucks is not worth the risk IMO.. Your opinion may differ.. But having an engine failure in the backcountry due to Chinese parts will cost you a lot more in the end.
Like anything made in China... some last some do not...

IMO< best option is to never skimp on internal engine components..
While I do agree about Chinese vs USA quality, every encounter I’ve had with forged pistons in snowmobiles has ended badly. I’ve ran SPI pistons in over a dozen sleds (never an 800 yet) with absolutely 0 issues. Personally I think a cast SPI piston will outlast a forged Wiseco any day of the week as it can take temperature swings, but that is just my opinion...
 

ADDIE

Well-known member
Premium Member
Nov 14, 2013
61
133
33
While I do agree about Chinese vs USA quality, every encounter I’ve had with forged pistons in snowmobiles has ended badly. I’ve ran SPI pistons in over a dozen sleds (never an 800 yet) with absolutely 0 issues. Personally I think a cast SPI piston will outlast a forged Wiseco any day of the week as it can take temperature swings, but that is just my opinion...
I think your opinion is one shared by many because of old horror stories and experiences.
It is unfortunate that this opinion is still present but it is understandable.

Forged is always stronger than cast. This is important.
Also you can not just assume all forged pistons are the same. Making this assumption would be incorrect.

All forged pistons are machined from an existing forging. Where (and how) this forging is produced is very important. This is a backbone of a forged piston. You are only as good as your forging and your rings and pin.

There is very good science as to why any high powered race engine will be using a forged piston. They simply are stronger and last longer.

A good USA made forging can not be beat! A Chinese forging can be beat easily!


Once you start with a quality USA made forging, the next critical process is how they are machined. Every forged piston is machined to the correct specs from the existing forging. this "spec" is very important and varies with the design and application. This is where the differences lie between the same forged piston from different "shops". The machining and added treatments to the forging determine how well it performs in the engine.

It is unfortunate, that many assume that all forged pistons made by one particular manufacturer are the same. Nothing could be further from the reality!

How the forging is machined and what is added, or nor added, to the piston can be and usually is, very different from one shop to another.

In the end, support USA made products they usually are superior and in this case certainly are!

Forged pistons, when properly machined to a spec that supports the application, are stronger and more resilient than any cast piston (dues to the properties of forged vs cast)

The old "idea" that all forged pistons require special handling is simply not true anymore. Any quality forged piston (USA made) will outlast and out perform any cast piston IMO.

We are in the 21st century, processes have been improved and knowledge has been gained.

Lastly, All forged pistons are NOT equal. This is important. The added treatments and geometric design is what, ultimately, determines how well the piston performs and lasts. AND the piston ring is very important. You can have a great forged piston design and install a poor ring and it will render the piston junk! The ring is very critical.
 
Nov 10, 2017
7
2
3
I think your opinion is one shared by many because of old horror stories and experiences.
It is unfortunate that this opinion is still present but it is understandable.

Forged is always stronger than cast. This is important.
Also you can not just assume all forged pistons are the same. Making this assumption would be incorrect.

All forged pistons are machined from an existing forging. Where (and how) this forging is produced is very important. This is a backbone of a forged piston. You are only as good as your forging and your rings and pin.

There is very good science as to why any high powered race engine will be using a forged piston. They simply are stronger and last longer.

A good USA made forging can not be beat! A Chinese forging can be beat easily!


Once you start with a quality USA made forging, the next critical process is how they are machined. Every forged piston is machined to the correct specs from the existing forging. this "spec" is very important and varies with the design and application. This is where the differences lie between the same forged piston from different "shops". The machining and added treatments to the forging determine how well it performs in the engine.

It is unfortunate, that many assume that all forged pistons made by one particular manufacturer are the same. Nothing could be further from the reality!

How the forging is machined and what is added, or nor added, to the piston can be and usually is, very different from one shop to another.

In the end, support USA made products they usually are superior and in this case certainly are!

Forged pistons, when properly machined to a spec that supports the application, are stronger and more resilient than any cast piston (dues to the properties of forged vs cast)

The old "idea" that all forged pistons require special handling is simply not true anymore. Any quality forged piston (USA made) will outlast and out perform any cast piston IMO.

We are in the 21st century, processes have been improved and knowledge has been gained.

Lastly, All forged pistons are NOT equal. This is important. The added treatments and geometric design is what, ultimately, determines how well the piston performs and lasts. AND the piston ring is very important. You can have a great forged piston design and install a poor ring and it will render the piston junk! The ring is very critical.
Well forged is stronger than cast, but I think alot of peoples seizures with them are from incorrect piston to wall clearance/ring gap and or not warming up.

I believe manufacturers put in cast for the simplicity that alot of riders dont warm up long enough, or stop for lunch ect. The rate of expansion is different between the 2 metals.

I think from a company's warrenty standpoint, putting in cast pistons are a safer bet for less warrenty work (and cheaper to buy)

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