Speedwerx 15HP or RK TEK head 15HP ?

J

jonhb

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Iceland

• Jul 5, 2010

• #1

Hi all, i have a small problem deciding if i should get a speedwerx kit (muffler, single pipe,y pipe) or the RK TEK head on my AC M8 2008. Sled is stock today but come summer we all want something more ... right ? Both products say they give me the same HP but the cost diff is 500 usd. I have heard great things about both labels and they are good quality. Anybody here have a say in the matter? would appreciate some tips from you who have tried one or both.

Summer greetings,

jonhb

 

Dam Dave

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• Jul 5, 2010

• #2

I don't think a head alone will give 15 hp, his head and shim kit might

 

mmsports

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hubsperformance.com

• Jul 5, 2010

• #3

start with the pipe

I would start with the pipe and Y and then do the head. Not to take business from RKt But thats just the order I would do.

 

V

vdog0531

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• Jul 5, 2010

• #4

i would also do the exhaust work. more hp and weight savings!

 

Thunder101

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• Jul 5, 2010

• #5

Get the shim kit , I've heard good things. & makes sence advancing the port timing to make more top end power.

 

Last edited: Jul 7, 2010

XFIRE800

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• Jul 5, 2010

• #6

You can get an SLP pipe setup for like $550 and you dont need a fuel controller, i would definitely recommend looking into that.

 

J

jonhb

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• Jul 6, 2010

• #7

thanks

i will definitly go with the pipes first. shims i will read more about looks very nice. many thanks again, you all rock

 

greeneman

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• Jul 7, 2010

• #8

I have the 15 h.p. kit on my 08 M8 and I was impressed. The kit does come with a base shim and he will cut the head to run the fuel you want at any given elve. I had mine cut to 91 oct. at 2500 feet. Most of my riding is 0 to 6000. It runs pretty close to my 10 HCR. If I had to do it again I think I would send my cylinders in to Kelsey and have them ported with the head. Little more money but if the base shim can do as much I would bet porting would do even more.

 

J

jonhb

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• Jul 7, 2010

• #9

that sounds very good. thanks for that input very helpful,

regards jonhb

 

S

sled-fiend

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www.raintek.ca

• Jul 8, 2010

• #10

XFIRE800 said:

You can get an SLP pipe setup for like $550 and you dont need a fuel controller, i would definitely recommend looking into that.

Click to expand...

That's the route I would go. Slp pipe set works great on the m8.

 

WyoBoy1000

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• Jul 8, 2010

• #11

The slp pipe works great, add it with porting and head mod, it rocks, slp, dakota performance and cutler porting all work awesome. A friend has the cutler porting (09 m8) and my piped m1000 has to be running almost perfect to beat it. I also came across a guy that had the (09 m8) dakota porting, mesh hood, boss seat and other light weight stuff (he was also 35-40lbs lighter than me) and he beat me. Another friend has the 2010 m8, he weighs 50lbs less and the only place I pull away is at the top of a hill. I would say that both the cutler and dakota ported sleds run as good or maybe better than the 2010 m8.