Pro Rmk big bores?

[glassman]

Stock vs 910 cylinder walls. This is what kelsey is talking about. Stock on the left of course.

 

[Merlin]

I'd be interesting, albeit possibly alarming, to see the stock cylinders from any of the 860-ish big bore kit providers after they finished...............0.176" is pretty thin!!!

I guess if the skirts stay on those cylinders we can certainly dismiss rod ratio as being an issue with these engines................

Stock vs 910 cylinder walls. This is what kelsey is talking about. Stock on the left of course.

 

[glassman]

They cant be any worse than the ones on this 910. Wafer thin walls somehow provide durability as well, according to some builders?

 

[sledhead004]

Kelsey,
Have you compared your big bore to a 800 pro with a boondocker. I know there has to be a little comparison. I know the turbo will out do it on a long pull, but how is it compared on the bottom and mid range?

 

[rpk3]

Thanks!

RK Tek is strong and has a following here in the Teton Range.

Thanks for keeping me in the loop...

 

[Finnlandr]

858 will out perform the Drop In Kit..

Just looked at your website.....so the 858 adds 11hp?

 

[RKT]

Just looked at your website.....so the 858 adds 11hp?

No, it adds MUCH more than that..

If my website shows it adding 11HP, the site is wrong, can you please tell me wher eyou saw this on my site?
Thanks

 

[NDFARMER95]

Also wondering about the 858.

 

[Finnlandr]

No, it adds MUCH more than that..

If my website shows it adding 11HP, the site is wrong, can you please tell me wher eyou saw this on my site?
Thanks

Heres the link and quote.....maybe I'm not understanding it correctly?

Can you tell me what the actual hp gain is? .....I'm genuinely interested.

Thanks


http://www.2strokeheads.com/Polaris800BigBore.htm

But, just for grins... Let's add the 7.5% more displacement ALONE into the equation..
So 60cc/800cc = 7.5% more volume
So at 150HP(Stock HP) x 7.5% = 11.25 So, the cc's alone CAN/MAY add 11HP or so..

 

[RKT]

Heres the link and quote.....maybe I'm not understanding it correctly?

Can you tell me what the actual hp gain is? .....I'm genuinely interested.

Thanks


http://www.2strokeheads.com/Polaris800BigBore.htm

But, just for grins... Let's add the 7.5% more displacement ALONE into the equation..
So 60cc/800cc = 7.5% more volume
So at 150HP(Stock HP) x 7.5% = 11.25 So, the cc's alone CAN/MAY add 11HP or so..

OK, I see what you are saying now.. Yes, that just shows what the added cc's ALONE could do.. NOT what the kit does.. with porting and head...

Maybe I should remove that info if it reads that way?

The 858 adds 25+HP and that is being a bit conservative

 

[Finnlandr]

Maybe I should remove that info if it reads that way?

Thats how I understood it (I'm not a gear head).......maybe others wont.

Thanks for the info....I'll call your office after the holiday to discuss more.

 

[sledneck_03]

OK, I see what you are saying now.. Yes, that just shows what the added cc's ALONE could do.. NOT what the kit does.. with porting and head...

Maybe I should remove that info if it reads that way?

The 858 adds 25+HP and that is being a bit conservative

Do you have a aftermarket pipe and map figured out for it yet or still stock pipe?

 

[RKT]

Do you have a aftermarket pipe and map figured out for it yet or still stock pipe?

Mapping is all figured out.. No aftermarket pipe, to date, has shown any gains with this engine..

 

[richracer1]

Maybe I should remove that info if it reads that way?

I understood it perfectly. All you have to is read the words as they are written and not try to add anything to it.

 

[NDFARMER95]

Mapping is all figured out.. No aftermarket pipe, to date, has shown any gains with this engine..

What's the reliability on your 858 kit? How many miles?

 

[owenbstory]

Fuel?

What about fuel requirements? Can the 858 safely run 91 non E or?

 

[RKT]

What's the reliability on your 858 kit? How many miles?

We have not had any failures with our 858 kit.. There are videos of it on the youtube channel that show it getting run and pushed hard..

We have been extremely pleased with it...

 

[RKT]

What about fuel requirements? Can the 858 safely run 91 non E or?

Yes, that is all we have ever ran in the kit.. The head design dictates the octane requirement and we have control over the head design 100%

 

[NDFARMER95]

We have not had any failures with our 858 kit.. There are videos of it on the youtube channel that show it getting run and pushed hard..

We have been extremely pleased with it...

I watched em all. Seems to be running pretty sound. How many miles have you logged so far?

 

[trlkidd]

Will the 858 work on the 2014?