Cams or piston?
#1
Cams or piston?
Well with my b-day is coming up so i'm gonna have some extra cash to buy some go fast parts[img]i/expressions/face-icon-small-happy.gif[/img] But my question to you guys is what should i do first cams or piston? What's the highest compression would u get for a trail/drag bike? Because i saw past post that said 14.1 is real hard on the motor for trail riding. What cams would u guys get if u wanted to flat drag but be able to cruise all day, hpr2 or 3? Thanks ahead of time for the advice.
Phil
Phil
#5
Cams or piston?
I would run 12-1. I liked the hpr4's that I ran. I have never ran the a1/a2 cams, but have the 109's and there good cams, just not in the same league as the hpr's. It's like having 8-1 compression to 14-1 compression, the 8-1 will get the job done but the 14-1's going to get it done faster. Do you want to run good, or fast?
#6
Cams or piston?
Well if you can only do one or the other I would probably elect to go with the piston. I know several people who are only running a higher compression piston and stock cams. Personally I waited to do both at the same time. I went with a 12:1 and used a gasket that brings the compression back down to 11:1 so I can use 91 octane pump gas. Later I can always swap out the gasket with little effort to bring the compression up to the full 12:1. The problem with doing the piston is it is something you really only want to do once! I hate them damn clips Grrrrrrrrrr! ( insert gnashing of teeth)....Cams are simple so long as you don't lose the chain or gears down the crank...( I didn't do it, I'm just sayin) Anyway if you can wait I'd suggest waiting to do it all at once.....
#7
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#8
#9
Cams or piston?
There is a balance between piston compression and cam profile. Intake valve size also plays a big role, but you can compensate for valve size up to a certain extent by changing the cam profile. You will never get the most out of a high compression piston, without a cam to complement it. Neither can you run a race cam on stock compression and expect it to produce good results. Yes, you might pick up a few ponies by installing the parts separately, but the right combination of these components will give you a real good bang for your bucks.
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