what about nitrus?

[Tyler Morris]

how is it on atvs? my cuzin uses it on his predator and it works great but what about other bikes?

[wilkin250r]

First off, spelling.

Second, yes, there are quite a few members that have run nitrous. I've done it, but I not anymore. I know several people that still have it, on a variety of quads. I did a little 250x, but others have done banshees, 250Rs, and 400EXs.

[GPracer2500]

Anyone run a Boondocker system on thier 400EX?

http://www.boondockers.com/site.htm

[Tyler Morris]

yeah ive been there! thats what my cuzin runs in his predator!

[GPracer2500]

Originally posted by Tyler Morris
yeah ive been there! thats what my cuzin runs in his predator!

He didn't happen to be at the Dunes last weekend? There was a Predator at Olds Saturday night that was super fast up the hill--smokin' YFZs and Raptor 700s!

[Eddiesanders250]

Tyler i see your from ojai, thats funny i was born down there and lived there for awhile. where do you ride down there?

[aviator4]

Thats my 400 on the Boondockers site under ATV Specs. I USED to run nitrous on my quad, before I went to a stroker.

I can tell you it was FAST (added 13.5 Horse with the small jet), looked awesome and was reliable/safe until I put a 416 pistong in it with too high of a compression piston.

Installaion was quick and easy. Heck, I liked it so much I bought an extra bottle. After blowing it up on the Dyno with a 12.5:1 piston and tryin' to run nitrous (and yes, I knew better :eek: ), I opted to just bore it out and stroke it to a 460. I get the same gains, better torque, and don't have to keep refilling a bottle. PLUS, I get to use it all day long, not just for 8 seconds at a time.

It did make a LOT of power though, I'll give it that.

[GPracer2500]

How much compression do you think is safe to run with a Boondockers settup?

[aviator4]

[edit] numbers corrected

Boondockers has told me that 10.5 to one is the upper limit for compression when running nitrous.

my local machinist also recommend boring the cylinder .0005 (.5 thousanths) larger than spec when installing a new piston and running nitrous. For example, a JE Piston will spec out at .0020 clearance. When running nitrous, add .0025 to .005 to the clearance to make it .00225 to .0025 for an engine running nitrous.

[GPracer2500]

Originally posted by aviator4
Boondockers has told me that 10.5 to one is the upper limit for compression when running nitrous.

my local machinist also recommend boring the cylinder .005 (5 thousanths) larger than spec when installing a new piston and running nitrous. For example, a JE Piston will spec out at .020 clearance. When running nitrous, add .0025 to .005 to the clearance to make it .0225 to .025 for an engine running nitrous.

Good info, thanks.

[wilkin250r]

That can't be right. 0.025 is HUGE. That is absolutely gigantic for a cylinder/bore clearance.

I suspect you've got your decimal in the wrong place. Typical clearance is about 0.002 (two thousandths of an inch) for a fresh bore, and the service limit is about 0.006. It would make much more sense if your mechanic told you an extra 0.0005 (half a thousandth).

[aviator4]

Yes, I do.

Should be .0020 stock, .00225 to .0025 for Nitrous.

Thanks Wilkin