Changes in Altitude

http://priuschat.com/forums/gen-ii-...-trip-results-out-west-through-mountains.html

http://priuschat.com/forums/gen-ii-...5-long-winter-high-altitude-trip-results.html

http://priuschat.com/forums/gen-ii-...-lost-all-power-going-up-mountain-passes.html

http://priuschat.com/forums/prius-hybrid-news/32311-driving-in-mountains.html

http://priuschat.com/forums/gen-ii-prius-main-forum/22104-mountain-driving-challenges.html

http://priuschat.com/forums/gen-ii-prius-main-forum/6990-mountain-driving.html

http://priuschat.com/forums/gen-ii-prius-main-forum/1143-rocky-mountain-driving.html

YMMV

 

I don't know if my Prius is just more spunky or what, but I have absolutely no problems. I live in Colorado, and routinely drive the I-70W corridore up the mountain passes through the Eisenhower Tunnel (11,000ft+), through Vail Pass (7% + grades). My Prius has had absolutely no trouble. I maintain speeds of 70mph to 85mph. Yes it is pedal to the metal but it does it.

In my Honda Civic, I do start to loose speed on the 10mile stretch of 6% uphill but I can start at 85mph and crest the top around 70mph or so.

It handles just fine in the mountains. I recently drove the stretch through horrible blizzards in the Prius and it was just fine. I mean horrible where there were many jackknifed semi-trucks scattered about the passes. Driving in the middle of the road and/or shoulder to get around stuck vehicles where people cant drive. Police cars in the ditches. No snow plows, nothing. The entire interstate was closed in 3 sections hours after I went through. So snow & ice & heavy grades + prius = just fine.

You have nothing to worry about unless you are a horrible driver.

 

Were you doing 70~85 MPH in the blizzard? What tires do you have on the Prius? Thanks!

 

Oh hell no! 70-85 is on the road in everything other than heavy rain or more than light snow.

In the blizzard it was everything from 5mph to around 40mph. 40mph was sort of pushing it. I almost crapped my pants driving through vail pass. I was going around 30-ish, and a big pickup truck passed me going probably 40 maybe 45. Lift kit, loud exhaust, and a PNP HID kit in the 8000k+ range. This was just before one of those 'S' curves where the road turned left and almost immediately turned right afterwards. Well the truck went left, the right, then 180 spin now going backwards down the highway, then it spun around a bit and went at a 90degree angle for a few hundred feet playing bumper cars with the guard rail over a cliff on the right and the rock face on the left (divided highway at this point). Of course him/her going out of control meant I was on the path to then hit the idiot, so I had to brake and of course it was really slipperly so when I realized I wasnt going to brake in time, I floored it and went around when I saw the chance.

Biggest danger in driving is the other idiots on the road. I slowed down after that for a bit, but then sped up a bit as we do.

My tires say "Tiger" on them, not sure what they are I havent really checked. They suck big time though, but tires make virtually no difference in most of my driving. I put a good set of winter tires on my civic, but my other cars are basic all-season. Technique rules over tires.

 

Here's another thread that details some trouble in Rocky Mountain driving, including an incident that occurred to us.

http://priuschat.com/forums/gen-ii-...5-2009-prius-trouble-in-mountain-driving.html

 

+1
We've crossed the contenental divide (traveling I.15) going from MT to CA or visa vers in the winter. A couple times is was snowing HARD. The prius is no SUV when it comes to ground clearance, but all things considered, it'll do. I prefer to find a big rig, then tuck in tight behind it. They act as a snow plow for me. Snow or sun, I've never noticed much of a difference in performance at altitude ... and MT DOES have altitude. In fact, the lowest point in the state is STILL above 2,000 feet.

 

Is this for real?
I go over Parleys at 75 and pass just about everyone.... Parleys is at 7300 feet, Salt Lake is 4500 feet, and I've never had the least amount of problems. I think it shouild actually do better than normal cars being that it has the electric engine and battery that can't be starved by a lack of oxygen....

 

Well once the battery is depleted you are in the same boat as everyone else. I think people are just scared to floor the car.

 

Hmmm.... If the Prius isn't screaming at me while going up the canyon, then I'm not trying.

Any Japanese 4 banger is meant for high revving....

Learning how to not deplete the battery and build it back up a bit in the flattish parts of any climb helps as well.

 

Doesnt work so well in the Colorado rockies as it is 2-10 miles straight up then back down again.

 

There is no uniform meaning to the terms "mountain pass" and "the continental divide." In some places, the continental divide isn't even noticeable (like on I-40 in NM). Some mountain passes are just short jogs while others are marathons.

If you intend to regularly drive over Loveland Pass in Colorado (or are heading East over Independence Pass, Monarch Pass, Wolf Creek Pass or Cameron Pass) and if you want to maintain 65 mph or more, then you'd better start with a fully green battery. For some reason these passes are more steep if you're heading East and, as a general rule, there are no spots (on the way up the Pass) flat enough to allow the batteries to recharge. Or just plan on going 55 mph at the top as that is as fast as the ICE will propel the car at 11,000 + feet elevation.

 

They shouldn't be. The computers prevent it from redlining.