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Extreme altitude #870283 12/03/10 01:54 PM 12/03/10 01:54 PM
Joined: Mar 2005 Posts: 2,644 North Carolina sasquatch OP master
sasquatch OP master Joined: Mar 2005 Posts: 2,644 North Carolina	Does anyone here have real world knowledge of tuning engines at 11,000 to 12,000 feet? I have a customer in South Africa that seems to be having some trouble with a 572 hemi. Most of the advise that works here does not seem to be working there. Todd www.mopartsracing.com

Re: Extreme altitude [Re: sasquatch] #870284 12/03/10 02:19 PM 12/03/10 02:19 PM
Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually B BradH Taking time off to work on my car
BradH Taking time off to work on my car B Joined: Jan 2003 Posts: 15,439 Val-haul-ass... eventually	11,000 + feet??? That guy needs to get tuning advice from NASA for that sort of altitude.

Re: Extreme altitude [Re: sasquatch] #870285 12/03/10 02:27 PM 12/03/10 02:27 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	Quote: Does anyone here have real world knowledge of tuning engines at 11,000 to 12,000 feet? I have a customer in South Africa that seems to be having some trouble with a 572 hemi. Most of the advise that works here does not seem to be working there. Todd boat racer, prolly. for what is the good life if not doing things thoughtfully?

Re: Extreme altitude [Re: maximum entropy] #870286 12/03/10 02:30 PM 12/03/10 02:30 PM
Joined: Nov 2010 Posts: 1,397 Carson City, Nevada Biginchmopar pro stock
Biginchmopar pro stock Joined: Nov 2010 Posts: 1,397 Carson City, Nevada	Less fuel, a lot less fuel!

Re: Extreme altitude [Re: maximum entropy] #870287 12/03/10 02:30 PM 12/03/10 02:30 PM
Joined: Mar 2005 Posts: 2,644 North Carolina sasquatch OP master
sasquatch OP master Joined: Mar 2005 Posts: 2,644 North Carolina	Actually it is in a 69 Charger.Todd www.mopartsracing.com

Re: Extreme altitude [Re: sasquatch] #870288 12/03/10 02:41 PM 12/03/10 02:41 PM
Joined: Aug 2003 Posts: 43,321 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,321 Bend,OR USA	Less fuel and more timing, is it dry or real humid where he is at? If more than 50% humidity lean it out some more than if it is dryer than 50%. Quality of fuel is a player also. Flying taught me that a 540 C.I. N/A airpalne motor will make 55% of its sea level power at 12000 ft leaned out to 75 degrees EGT rich of peak in standard atomsphere, less if hotter and less B.P., worse if humid also IHTHs Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Extreme altitude [Re: sasquatch] #870289 12/03/10 02:42 PM 12/03/10 02:42 PM
Joined: Apr 2005 Posts: 2,128 Salt Lake City C camastomcat top fuel
camastomcat top fuel C Joined: Apr 2005 Posts: 2,128 Salt Lake City	I run 7000-9000 corrected all summer and jet my 1150 dom. at 86's square instead of 92-94's. I also run 33* instead of 31* timing,

Re: Extreme altitude [Re: camastomcat] #870290 12/03/10 02:50 PM 12/03/10 02:50 PM
Joined: Mar 2005 Posts: 2,644 North Carolina sasquatch OP master
sasquatch OP master Joined: Mar 2005 Posts: 2,644 North Carolina	Actually one of the problems seems to be boiling the Trans fluid. I sent him a Dynamic 9.5 that I have used a ton and it boils the fluid in around town driving WITH a big cooler. With a 12 inch converter and a 572 hemi it seems to run around 185. But who wants to run a 2400 stall with a 572 hemi??? Todd www.mopartsracing.com

Re: Extreme altitude [Re: sasquatch] #870291 12/03/10 03:09 PM 12/03/10 03:09 PM
Joined: Feb 2004 Posts: 1,093 Long Beach, CA Mike Swann super stock
Mike Swann super stock Joined: Feb 2004 Posts: 1,093 Long Beach, CA	Todd, EFI would be the way to go. If not, The air bleeds woudl have to be closed up a bit. Does it have a power valve? If so, it would have to come in at a lower signal. Hope this helps 8.30's @3400 lbs

Re: Extreme altitude [Re: sasquatch] #870292 12/03/10 03:36 PM 12/03/10 03:36 PM
Joined: Sep 2006 Posts: 3,749 Chowchilla,ca Chassisman master
Chassisman master Joined: Sep 2006 Posts: 3,749 Chowchilla,ca	Quote: Actually one of the problems seems to be boiling the Trans fluid. I sent him a Dynamic 9.5 that I have used a ton and it boils the fluid in around town driving WITH a big cooler. With a 12 inch converter and a 572 hemi it seems to run around 185. But who wants to run a 2400 stall with a 572 hemi??? Todd Thats odd...I have a hard time boiling potatoes at my cabin at 8500 ft...water takes up to 30 minutes to boil up there....LOL

Re: Extreme altitude [Re: Chassisman] #870293 12/03/10 03:58 PM 12/03/10 03:58 PM
Joined: Feb 2007 Posts: 5,080 organ M maximum entropy master
maximum entropy master M Joined: Feb 2007 Posts: 5,080 organ	Quote: Quote: Actually one of the problems seems to be boiling the Trans fluid. I sent him a Dynamic 9.5 that I have used a ton and it boils the fluid in around town driving WITH a big cooler. With a 12 inch converter and a 572 hemi it seems to run around 185. But who wants to run a 2400 stall with a 572 hemi??? Todd Thats odd...I have a hard time boiling potatoes at my cabin at 8500 ft...water takes up to 30 minutes to boil up there....LOL you need more btu's! and double (or triple) your cooking times! we used to put our fingers in boiling water on our climbing expeditions! even here in bend (~3600 ft) it boils at about 200�. for what is the good life if not doing things thoughtfully?

Re: Extreme altitude [Re: Chassisman] #870294 12/03/10 10:19 PM 12/03/10 10:19 PM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Quote: Quote: Actually one of the problems seems to be boiling the Trans fluid. I sent him a Dynamic 9.5 that I have used a ton and it boils the fluid in around town driving WITH a big cooler. With a 12 inch converter and a 572 hemi it seems to run around 185. But who wants to run a 2400 stall with a 572 hemi??? Todd Thats odd...I have a hard time boiling potatoes at my cabin at 8500 ft...water takes up to 30 minutes to boil up there....LOL With less atmospheric pressure water boils easier at a lower temp. Maybe your fire doesnt have enough oxygen to create enough heat/btu,s, High atmosphere = way less fuel. Small airplanes have a lean out valve you adjust the higher it climbs. Kind of like a choke cable thingy but instead of choking air your choking fuel. mike

Re: Extreme altitude [Re: Sport440] #870295 12/03/10 10:44 PM 12/03/10 10:44 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Must be something to do with the atoms. Gotta love that second post by Budget.

Re: Extreme altitude [Re: 602heavy] #870296 12/03/10 10:56 PM 12/03/10 10:56 PM
Joined: Feb 2006 Posts: 2,379 MD Kevins493 top fuel
Kevins493 top fuel Joined: Feb 2006 Posts: 2,379 MD	pretty sure what you're running into is the main (only?) reason WWII fighters had some form of forced induction on them.

Re: Extreme altitude [Re: Kevins493] #870297 12/03/10 11:02 PM 12/03/10 11:02 PM
Joined: Dec 2008 Posts: 1,200 UK 6 602heavy pro stock
602heavy pro stock 6 Joined: Dec 2008 Posts: 1,200 UK	Some high altitude world war two planes ran the bottle.

Re: Extreme altitude [Re: sasquatch] #870298 12/03/10 11:14 PM 12/03/10 11:14 PM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Todd, I dont know whats happening with your tranny fluid. I doubt its boiling as that would require a temp of about 800 + degrees witch by the way is its approximate auto ingnite temp. My guess is its foaming up for some reason, lack of fill maybe While 12000 ft. is high enough to have a effect on A/F its not that high IMO to have any major effects on the tranny or engine oil fluids. I could be wrong about that though. mike

Re: Extreme altitude [Re: Sport440] #870299 12/04/10 01:57 AM 12/04/10 01:57 AM
Joined: Oct 2008 Posts: 492 South Jersey, NJ D DragDart360 mopar
DragDart360 mopar D Joined: Oct 2008 Posts: 492 South Jersey, NJ	70 Dart Swinger, 2850 lbs SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133

Re: Extreme altitude [Re: Kevins493] #870300 12/04/10 02:04 AM 12/04/10 02:04 AM
Joined: Oct 2008 Posts: 492 South Jersey, NJ D DragDart360 mopar
DragDart360 mopar D Joined: Oct 2008 Posts: 492 South Jersey, NJ	Quote: pretty sure what you're running into is the main (only?) reason WWII fighters had some form of forced induction on them. The power problem is mixture comtrol probably to rich. The reason WW2 fighters had boosted engines was as Cab said at 12000 ft you're down to 55% power. It's really hard to dogfight with no power! The bombers had boost to get high enough to fly over the FLAK. 70 Dart Swinger, 2850 lbs SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133

Re: Extreme altitude [Re: 602heavy] #870301 12/04/10 02:05 AM 12/04/10 02:05 AM
Joined: Oct 2008 Posts: 492 South Jersey, NJ D DragDart360 mopar
DragDart360 mopar D Joined: Oct 2008 Posts: 492 South Jersey, NJ	Quote: Some high altitude world war two planes ran the bottle. Can you provide an example? 70 Dart Swinger, 2850 lbs SB 408, Bullet roller 264/268 @50 .636 SSDS stage 2 Edelbrock heads, 1 7/8 Headmans, 1050 dominator by Dom, 9.867 @ 133

Re: Extreme altitude [Re: Chassisman] #870302 12/04/10 02:27 AM 12/04/10 02:27 AM
Joined: Jan 2003 Posts: 42,714 Spokane Washington ScottSmith_Harms Mr Wizzard
ScottSmith_Harms Mr Wizzard Joined: Jan 2003 Posts: 42,714 Spokane Washington	6336514-BabyCarb.jpg (24 downloads)

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