the next mod i am getting is a head for my sport it says to run 104 octane fuel but what if i don't will i just not get all power from the mod and can the stock gear box hanndle that much compression

 

By gearbox, I'm assuming you mean transmission. I haven't heard of anyone having problems with the trans. I know several people who have the hpd full race mod and have run it for years with no trans. problems.

 

The only trans probs I've heard of is if someone is running the race mod w/ 4x4. The HPD head has the O-ring seals for a more effecient heat transfer. Also, why not go to the 15.5:1 dome, for just ripping around, you can easily run Av gas....also, iif you get rid of that DG pipe, your quad will thank you w/ more speed. [img]i/expressions/face-icon-small-smile.gif[/img]

 

thanks about the gearbox i don't want to pay 600 big ones for a new like i did on my trailblazer

 

i looked for others but hpd and other polaris companys don't makw them for a 1994 i think it is to old fmf dose but they only make the gnarly pipe and i will loose top end do you know of anyother pipes

 

did you try CPI?

 

dose it have a web site

 

I definitely would not run regular gas with your 14:1 head. 91 octane fuel is too volatile, and will pre-ignite with such high compression. You'll be looking at severe engine damage. Stick with the recommended 104 octane.

And didn't you make an earlier post about removing the radiator fan? I take it this machine is just going to be a drag racer? If not, you might want to reconsider the removal of the fan.

 

well i might just get a pro design cool head with the interchangable domes during the racing season i will put in the 14.1 dome then when i trail ride i will put a 12.1 dome in

 

or i will buy 94 octane and put octane boost in it to make 104 and i was the one about the fan i may drag race