TPI at High altitude - MAF or SD?
02-23-2004, 10:20 AM
#1
Member
Thread Starter
Join Date: Dec 2003
Location: Frederick, CO
Posts: 131
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 SS
Engine: 305 L69
Transmission: 2004R
Axle/Gears: 7.625, 3.73
TPI at High altitude - MAF or SD?
Anyone know which TPI system works better at higher altitudes? I'm at 5344' and some of my "road trips" include going as high as 10,000 to 11,000 ft of altitude.
Thanks,
Larry.
Thanks,
Larry.
02-23-2004, 12:25 PM
#2
TGO Supporter
Join Date: Oct 2003
Location: ready room
Posts: 2,069
Likes: 0
Received 0 Likes
on
0 Posts
Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Re: TPI at High altitude - MAF or SD?
Originally posted by whitess
Anyone know which TPI system works better at higher altitudes? I'm at 5344' and some of my "road trips" include going as high as 10,000 to 11,000 ft of altitude.
Thanks,
Larry.
Anyone know which TPI system works better at higher altitudes? I'm at 5344' and some of my "road trips" include going as high as 10,000 to 11,000 ft of altitude.
Thanks,
Larry.
02-23-2004, 02:47 PM
#3
Member
Thread Starter
Join Date: Dec 2003
Location: Frederick, CO
Posts: 131
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 SS
Engine: 305 L69
Transmission: 2004R
Axle/Gears: 7.625, 3.73
I had read somewhere where SD was better suited to higher altitudes like ours but never could find anything to cooberate it.
Thanks,
Larry.
Thanks,
Larry.
02-23-2004, 03:10 PM
#4
TGO Supporter
Join Date: Oct 2003
Location: ready room
Posts: 2,069
Likes: 0
Received 0 Likes
on
0 Posts
Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Originally posted by whitess
I had read somewhere where SD was better suited to higher altitudes like ours but never could find anything to cooberate it.
Thanks,
Larry.
I had read somewhere where SD was better suited to higher altitudes like ours but never could find anything to cooberate it.
Thanks,
Larry.
02-23-2004, 03:22 PM
#5
TGO Supporter
Join Date: Oct 2003
Location: ready room
Posts: 2,069
Likes: 0
Received 0 Likes
on
0 Posts
Car: NCC-1701-D (docked in AZ)
Engine: impulse drive
Transmission: fusion reactors
Axle/Gears: Rescued from the Borg by my crew
Here is a link comparing the two systems. It doesnt mention altitude at all. http://www.carcraft.com/techarticles/24549/.
02-23-2004, 06:31 PM
#6
Member
Thread Starter
Join Date: Dec 2003
Location: Frederick, CO
Posts: 131
Likes: 0
Received 0 Likes
on
0 Posts
Car: 85 SS
Engine: 305 L69
Transmission: 2004R
Axle/Gears: 7.625, 3.73
Looks like the thing that would "maybe" make a difference would be the way SD uses vacuum as part of it's programming. If I remember right vacuum increases as altitude increases(or is it the other way around?!
). Whatever the case if the SD system makes it's calculations from vacuum then that could explain why it "might" work better for altitude changes. Of course it may not be that precise. Looks like it still boils down to preference and whether or not you are doing mods.
Thanks for the help.
Larry.
). Whatever the case if the SD system makes it's calculations from vacuum then that could explain why it "might" work better for altitude changes. Of course it may not be that precise. Looks like it still boils down to preference and whether or not you are doing mods.Thanks for the help.
Larry.
02-23-2004, 07:36 PM
#7
Senior Member
Join Date: Apr 2002
Location: Houston, Texas
Posts: 672
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1989 GTA Nighthawk
Engine: 389 CID TPI
Transmission: TCI 700R4
Axle/Gears: 9 bolt 3.23
They both should be fine but the MAF system will work better as it measures the mass of the air which means it auto compensates for differences in humidity, altitude and temperature.
Trending Topics
02-25-2004, 09:08 PM
#8
Member
Join Date: Sep 2002
Location: Elizabethtown, KY
Posts: 158
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Formula 350
Engine: L98 w/ Stealthram
Transmission: 700R4
Axle/Gears: 9 bolt 3.27
Vacuum is actually any pressure less than current atmospheric pressure. At sea level, atmospheric pressure is 14.7 psi. It is less at higher altitudes. I believe Denver is somewhere around 10-12 psi. I would think, that a MAF system would be better suited to higher altitudes than SD because of this.
Thread
Thread Starter
Forum
Replies
Last Post
NBrehm
Engine/Drivetrain/Suspension Parts for Sale
1
08-25-2015 11:49 PM
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
08-12-2015 03:41 PM
