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2.75 performs awesome but absolutely the worst drivers setup to date. Polaris drivers suck but this out does even typical polaris. 86 miles and have had tighten the track 4 times and it’s damaged already. Need powder freaks drivers and anti stab cuz a 6 tooth, center drive 3.5 pitch driver can’t...

On average in Sicamous I see 2.2-2.8 psi gain from elevation comp. my guess would be they would boost hp to 175 ish for all elevation if they can with mediocre fuel being a variable

100% it’s at least been hooked to the wrong side before......, but below 4psi that wouldn’t make a difference would it ??? [emoji2357][emoji1787][emoji1787][emoji1787]

Gauge pressure shows the difference in pressure between the tap point and the local atmospheric pressure. This shows the differential between the two with the atmospheric pressure variable. Absolute pressure is the pressure differential between the tap point and 14.7 psi or 1ATM.

Wrong again gauge reads boost pressure. A map sensor reads in absolute pressure. The gauge will read 3-4 psi You don’t understand boost pressure vs absolute pressure is the problem

It would show 3-4 psi boost. The ecu monitors MAP pressure. Boost pressure is not MAP. Boost is pressed above atmospheric pressure. If you want to get real fancy put a electronic post gauge on it they read true 0 at all elevation that will show you your boost pressure. Hook up BUDs and...

You need to figure out the difference in gauge pressure, boost pressure and absolute pressure. MAP and boost pressure is not the same. Boost pressure is above atmosphere map is absolute pressure.

Building vacuum is related to the throttle bodies being closed. You have a tiny space in the throttle bodies for air to passes so at low rpm the intake manifold has less pressure then atmosphere. As throttle bodies open atmospheric pressure (Na setup) acts on this and decreases the negative...

You just answered your own question dumb ass. Gauge pressure is relative to atmospheric pressure. If you gain elevation and add boost your still adding positive pressure because your above atmospheric pressure for that elevation. The sled is turbo charged and has boost pressure. Man go read a...

This guy eats massive amounts of yellow crayons and still jerks off over TSS 5 years after they put them selfs our of business ......

Dog house is like the main trial stock sleds climb dog house all the time my I’ve had my gf climb dog house and a buddy on a stock 155 polaris his second day in the mountains

Has no wg spring.

What a **** storm of bad/wrong information this this. Some people need to open a text book or read description and operation my **** [emoji2357]

Boost is not referenced to 14.7 it is referenced to BARO

You have that waaaaay backwards. Engine has high vacuum at idle the highest point of vacuum will be when RPM is high and throttle snaps shut. Idle will be typical 18 in hg of vacuum, throttle snap 21-22 in hg of vacuum and wide open 0 vacuum = to atmospheric pressure.

Wrong! Many Boost gauges reference atmospheric pressure as you gain elevation a gauge will still be 0 KOEO. It equalizes pressure increases both sides of the diaphragm. You will not go into vacuum as you gain elevation so it will read boost pressure. In most areas we ride in...

I have a 155 3” for my sticker this year and love it. I have had a couple 2.6’s and don’t like that track at all 3” factory works a lot better for me

Bikeman dyno is always high never good by that. MX express dumped it just above 165. Turbo sleds in a dyno will never be 100% accurate anyway. Watch boost they will have full boost by clutch engagement rpm pretty much it kids the engine/turbo difference then the cvt/snow

But full boost will still come on way sooner on the dyno then the snow. On the snow it’s starting making boost at 6200 rpm the dyno I bet it’s got full boost before that

The dyno graph will never be 100% accurate on the turbo because the dyno loads the engine/turbo difference then a cvt/snow. The turbo sled will make full boost before 5000 rpm on a dyno when on the snow it will be just coming into boost at rhat rpm. Don’t take this wrong not hating at all it’s...