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more HP wanted

yukon yamaha

TY 4 Stroke Master
Joined
Jan 30, 2008
Messages
1,092
Age
39
Location
WHITEHORSE, YUKON CANADA
Country
Canada
Snowmobile
2008 nytro custom! 2014 viper custom
same old story.... :drink: I want more power ! with out boost....
mod list so far
k&n intake
mpi exhaust
cr10 plugs
pc3
launch master
1.75 race track
great yamaha clutching
head light delete kit

coming mods
excell header
pc5 w/auto tune o2 in pipe

Any other mods anyone can think of to get some more jam out of the 08 beast would be great!
:Rockon:
 

I thought about nos but it is very hard to clutch for and the + - 's seem to end up more towards the minus in my mind

i did end up adding some lightweight stuff as well but nothing that will sacrafice the strength of the machine.... battery and the seat have been done

Has anyone played with advancing the timing on these machines?
 
yukon yamaha said:
I thought about nos but it is very hard to clutch for and the + - 's seem to end up more towards the minus in my mind

i did end up adding some lightweight stuff as well but nothing that will sacrafice the strength of the machine.... battery and the seat have been done

Has anyone played with advancing the timing on these machines?

Timing has been played with on the dyno before but shows no real gains HP wise...not to say that it doesn't help with the tune...just doesn't show up on a chart.
With the mods you have and what you plan on doing you should gain 10-12hp over stock...how much more do you want?
 
yukon yamaha said:
I thought about nos but it is very hard to clutch for and the + - 's seem to end up more towards the minus in my mind

i did end up adding some lightweight stuff as well but nothing that will sacrafice the strength of the machine.... battery and the seat have been done

Has anyone played with advancing the timing on these machines?

You dont clutch for NOS just add a little weight to lower the rpms some. As long as you dont hit the rev limiter and with a small shot it is very doable... :-o
 
You can do some head work and gain another 10-15hp on top of what you are doing. So with the header,intake and every thing ealse + porting you could see around 160hp. Its something I was thinking about doing when i had my 08 and ended up like you ran out of mods to do and wanted more hp with out boosting
 
BooBoo said:
You can do some head work and gain another 10-15hp on top of what you are doing.
hmm.... I thought it was 10-15 hp for head work while you are boosted. I haven't heard big gains like that from a little port work, as that seem like more then an exhaust and header w/ commander combined.
 
Well really i would like to get as much as I can get out of this engine... as for the porting that is something i would like to have done for sure, doing the intake and exhaust might not give it huge hp numbers but any better flow over stock is a step in the right direction...
 
yukon yamaha said:
Well really i would like to get as much as I can get out of this engine... as for the porting that is something i would like to have done for sure, doing the intake and exhaust might not give it huge hp numbers but any better flow over stock is a step in the right direction...

The exhaust and intake also give better off the line power.
 
I suppose if I got the intake and exhaust cleaned up I might aswell get 10 thou takin off the head too since i have to take it off to get the porting done
 
what grade of gas do you need to run?
25 thou wow that is alot... did you see feel any gains?
 


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