altitude and timing

jimi87-t

Active Member
Oct 12, 2005
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Well thanks guys for the info, the timing thing never really made scene to me (no offense intended).

I've also heard that some of the first turbo/supercharger development took place right here at pikes peak, not sure if thats true, but cool if it is.

I got her back up and running, set timing at 10deg. Hope this time around she holds ;)
 

IJ.

Grumpy Old Man
Mar 30, 2005
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LMAO good qualification for a pilot :D

There's a chain for a handhold, it's very steep in parts while we were going up a Japanese woman lost her footing and I managed to grab her arm as she fell past us, I was holding her hanging by her wrist. :aigo:

There's a board at the bottom that list how many people have died climbing it.

You can see the path up in this pic.

[thumb]http://ij.supramania.com/bump0.jpg[/thumb]
 

Nick M

Black Rifles Matter
Sep 9, 2005
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suprarx7nut;1310296 said:
I have always wondered what my NA would feel like at sea level.

Like a totally different car.

One day when you aren't doing anything, get on I-70 and go east. About half way across Kansas you will wonder what happened.
 

Nick M

Black Rifles Matter
Sep 9, 2005
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JJ, I don't have my old 852 course here, but it sure seems like that engine load is a correction factor for ignition. The Autoshop page(older course) on TCCS says the same thing. edit; It says engine load is a base factor, along with Ne and G1. Not a correction.

Jimmy, I didn't mess with my timing when I lived in Denver. We have a closed loop timing circuit. Not very advanced mind you, but the gains were not noticable, if they existed. Measured by the butt meter. Unlike an EEC-IV Mustang, which is set(advance), and changes to base are noticable. As total is effected.
 

jimi87-t

Active Member
Oct 12, 2005
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Thanks Nick. I totally forgot you use to live out here. Now I remember you telling me that when I first started talking about moving here.
 

jimi87-t

Active Member
Oct 12, 2005
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Colorado Springs
Another interesting thing about altitude, I noticed my vac seems lower, around 15 in/hg. I'm pretty sure it was more than this in TX.
So I checked all my vac lines and they are fine (and brand new BTW)

So I did a search for altitude affecting manifold vac, and read a few write ups about it. And they say that for every 1000 ft of elevation there is a loss of 1 in.

Inches of Altitude Vacuum
Sea level-1000 ft. 18-22
1000-2000 ft. 17-21
2000-3000 ft. 16-20
3000-4000 ft. 15-19
4000-5000 ft. 14-18
5000-6000 ft. 13-17

Here are a couple links:
Driveability Corner
http://www.atlanticz.ca/zclub/techtips/vacuum/

So if this is accurate, my reading of 15in is good, I'm at 6500ft.
Or is this all hog wash too, and I need to start looking for problems.....