3.6 power loss at elevation

[Old Frank]

Drove over Loveland Pass last week. 12,000 ft. No problem. 2019 3.6.

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[Zandcwhite]

Drove over Loveland Pass last week. 12,000 ft. No problem. 2019 3.6.

144 wheel hp is enough to move the vehicle, of course there's no problem. The 4.0L barely made more than that at sea level brand new. Doesn't mean that the power loss isn't real and substantial, glad you're happy with it.

 

[2nd 392]

144 wheel hp is enough to move the vehicle, of course there's no problem. The 4.0L barely made more than that at sea level brand new. Doesn't mean that the power loss isn't real and substantial, glad you're happy with it.

The 3A had 60 HP at the flywheel, at the wheels ? In the High Sierra’s, it will get there, Very Slowly. A 20% Hp increase with a 72 HP Hurricane swap upgraded it to Slowly.
What would 60 flywheel HP at sea level be at the wheels in the High Sierra’s ? Anyway- enough to get there.
I replaced the Hurricane with a HP Chevy in my 63, it could tow a loaded trailer over Donner Summit over 65 MPH, VS, being towed with the Hurricane, and yea, the Chevy ran fat and lost power, but had sufficient left to Git-Er-Done.

 

[Zandcwhite]

The 3A had 60 HP at the flywheel, at the wheels ? In the High Sierra’s, it will get there, Very Slowly. A 20% Hp increase with a 72 HP Hurricane swap upgraded it to Slowly.
What would 60 flywheel HP at sea level be at the wheels in the High Sierra’s ? Anyway- enough to get there.
I replaced the Hurricane with a HP Chevy in my 63, it could tow a loaded trailer over Donner Summit over 65 MPH, VS, being towed with the Hurricane, and yea, the Chevy ran fat and lost power, but had sufficient left to Git-Er-Done.

Most mid-sized tractors make in the 100hp range, but they make a lot more torque than the 3.6L and do everything slowly. The 3a weighs less than half that of the JLU as well. Losing 30% of 60hp is significant, but it's still only 18hp compared to 70hp in a heavy rig that we still expect to drive 80+mph. The 3A won't do 80mph, which is probably good because it would be terrifying at that speed.

 

[2nd 392]

Most mid-sized tractors make in the 100hp range, but they make a lot more torque than the 3.6L and do everything slowly. The 3a weighs less than half that of the JLU as well. Losing 30% of 60hp is significant, but it's still only 18hp compared to 70hp in a heavy rig that we still expect to drive 80+mph. The 3A won't do 80mph, which is probably good because it would be terrifying at that speed.

45 mph max speed Dad added a Studebaker OD allowing ~60 mph, but the super short driveshaft was problematic off road and he removed it. The PU’s back then were SC, 3 hunters at best. Fortunately Dad’s friend had large land holdings in the Hirshdale area ( past Truckee) the first trip of the season one towed the Jeep, another the camp trailer, left behind a locked gate close to the caretakers cabin. We all went in a station wagon until the last weekend.
When he died some a-hole burned the cabin.
with Saginaw PS, and a good job by the guy that set up the front end, my 63 was no problem at high speed.
Edit- had to look it up but the Go Devil- 105 lb ft, Hurricane- 114 lb ft, they ran on Torque not HP.

oh yea- terrifying, a friend’s father had a 911S powered Dune Buggy
As was my 63 after the Blown Chevy was installed

 

[Ratbert]

Drove over Loveland Pass last week. 12,000 ft. No problem. 2019 3.6.

From Loveland Pass you can see what I skied down my first year here in CO. Double Diamond Extremes in a T-Shirt after nearly an hour of hiking. Yeah, I was even more stupid about doing insane stuff back then.

And just because you did it w/o problems doesn't negate the fact that you were doing it with ~36% less power than at sea level.

 

[Zandcwhite]

From Loveland Pass you can see what I skied down my first year here in CO. Double Diamond Extremes in a T-Shirt after nearly an hour of hiking. Yeah, I was even more stupid about doing insane stuff back then.

And just because you did it w/o problems doesn't negate the fact that you were doing it with ~36% less power than at sea level.

He didn't dyno it at the peak, so we can't prove he wasn't making 4k horsepower.

 

[Dusty Dude]

And just because you did it w/o problems doesn't negate the fact that you were doing it with ~36% less power than at sea level.

So I was thinking of this issue while going over Logan Pass in Glacier NP a few days ago.

If you are at partial throttle, you aren’t at max power output. If your “normal” acceleration rate is 1/4 throttle, you will probably have to go to 1/3 to 1/2 throttle and would be able to achieve the same rate at a higher altitude. So being on a high altitude curvy pass at low speed, you would notice that you have to be on the throttle a little more and that’s it.

If you are on a high altitude expressway trying to maintain a high speed, chances are you will have to be at full throttle instead of partial throttle and then you will really notice the loss of power.

On average though, we aren’t at full throttle all the time. So the loss at partial throttle is kind of subjective.

Just my unedumicated two cents…

 

[2nd 392]

On average though, we aren’t at full throttle all the time. So the loss at partial throttle is kind of subjective.

Just my unedumicated two cents…

your refund sir

 

[AnnDee4444]

So I was thinking of this issue while going over Logan Pass in Glacier NP a few days ago.

If you are at partial throttle, you aren’t at max power output. If your “normal” acceleration rate is 1/4 throttle, you will probably have to go to 1/3 to 1/2 throttle and would be able to achieve the same rate at a higher altitude. So being on a high altitude curvy pass at low speed, you would notice that you have to be on the throttle a little more and that’s it.

If you are on a high altitude expressway trying to maintain a high speed, chances are you will have to be at full throttle instead of partial throttle and then you will really notice the loss of power.

On average though, we aren’t at full throttle all the time. So the loss at partial throttle is kind of subjective.

Just my unedumicated two cents…

DBW throttle isn't linear to engine power output. It wouldn't surprise me if the engine spent far more time at WOT than your foot does.


Also I've never seen a radar gun pointed at the uphill lane...

 

[Zandcwhite]

DBW throttle isn't linear to engine power output. It wouldn't surprise me if the engine spent far more time at WOT than your foot does.


Also I've never seen a radar gun pointed at the uphill lane...

I've been pulled over driving up donner pass, just because most don't speed doesn't mean you can't. The chp waiting to catch people not riding the brakes down the hill and therefore speeding is chicken shit revenue chasing at its finest.

 

[jadmt]

So I was thinking of this issue while going over Logan Pass in Glacier NP a few days ago.

If you are at partial throttle, you aren’t at max power output. If your “normal” acceleration rate is 1/4 throttle, you will probably have to go to 1/3 to 1/2 throttle and would be able to achieve the same rate at a higher altitude. So being on a high altitude curvy pass at low speed, you would notice that you have to be on the throttle a little more and that’s it.

If you are on a high altitude expressway trying to maintain a high speed, chances are you will have to be at full throttle instead of partial throttle and then you will really notice the loss of power.

On average though, we aren’t at full throttle all the time. So the loss at partial throttle is kind of subjective.

Just my unedumicated two cents…

I have done logan pass many times over the last 50 years or so in all different modes including bicycling, motorcycling, running, in about every kind of vehicle you can think of it is only 6600 feet or so so not terribly high and I have never noticed any performance decrease at the low of elevation on any of my vehicles. Problem with Logan pass is there is rarely an opportunity to really open it up unless of course you do it very late at night or early in the morning. super cool to do under the full moon at 2am....

 

[jadmt]

DBW throttle isn't linear to engine power output. It wouldn't surprise me if the engine spent far more time at WOT than your foot does.


Also I've never seen a radar gun pointed at the uphill lane...

absolutely you do see that in Montana....and the "I was just building momentum" excuse doesn't work.

 

[2nd 392]

I've been pulled over driving up donner pass, just because most don't speed doesn't mean you can't. The chp waiting to catch people not riding the brakes down the hill and therefore speeding is chicken shit revenue chasing at its finest.

If we could only not be in such a hurry, slow down, and enjoy the drive over the old Donner Pass hwy 40. I can’t recall when the last time I did was, always in a rush to get there along with the other 36,000 vehicles every day.

 

[Zandcwhite]

If we could only not be in such a hurry, slow down, and enjoy the drive over the old Donner Pass hwy 40. I can’t recall when the last time I did was, always in a rush to get there along with the other 36,000 other vehicles every day.

That party it's named after took it a little too slow getting to the other side, and we know how that turned out. "Officer I wasn't speeding, I'm hungry and don't want to have to eat one of my passengers"

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