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engine work and shimming??

sheetwright

Northwoods Snowmobiling Facebook
Joined
Jul 7, 2008
Messages
2,242
Location
Northwoods USA
Country
USA
Snowmobile
2021 Yamaha SRX
At what point, or what amount of NOS are guys having to do engine work for their nitrous setups? Looking to put a 40hp shot on an Apex. Didn't know if it is like boost from a supercharger; where you have to do engine work when you go to X amount of boost? Don't want to just through it on and do some mapping. Then watch a rod blow through
 

IMO, you can safely run up to 60-75hp shot. The Apex engine can easly handle that additional hp. After that I would think about adding a different head gasket etc. I also added 10ek's plugs and run 92 to aid in a cooler combustion.. The key is to make sure you add the appropriate amount of fuel while on NOS. I have the boondocker kit with the fuel controller mod, easy to dial in....

Good luck.
KI
 


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