Air and MPH
#2419294
12/16/17 12:29 AM
12/16/17 12:29 AM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Hey guys,
In the middle of Australia and the middle of the day @ 3500 ft my car ran 135mph, back on the west coast at night and 500 ft it ran 131mph, both passes 10.2. Does this tell you anything ? Needs more fuel in better air ? valve springs going bad ?
Cheers
1963 Plymouth Max Wedge 1971 Barracuda
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Re: Air and MPH
[Re: MR_P_BODY]
#2419335
12/16/17 02:09 AM
12/16/17 02:09 AM
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Joined: Dec 2006
Posts: 214 Colo Springs, CO
DconD100
enthusiast
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enthusiast
Joined: Dec 2006
Posts: 214
Colo Springs, CO
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Any chance the Aussie's are still running the old school timing system with another timing trap 66 feet after the finish line?
Last edited by DconD100; 12/16/17 02:11 AM.
Pump Gas Small Blocks Rock!
11.53 @ 116mph E85 408 at 8500 ft da,
3605 pound truck, 3.91s, street driven
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Re: Air and MPH
[Re: DconD100]
#2419341
12/16/17 02:19 AM
12/16/17 02:19 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I wouldnt care.. he has already picked up 4mph with no jet change.. to be safe go fatter.. he can always go leaner if needed
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Re: Air and MPH
[Re: MR_P_BODY]
#2419348
12/16/17 02:39 AM
12/16/17 02:39 AM
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Joined: Dec 2006
Posts: 214 Colo Springs, CO
DconD100
enthusiast
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enthusiast
Joined: Dec 2006
Posts: 214
Colo Springs, CO
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I was just questioning whether or not he actually lost any mph or not. I lost 3 mph when our track switched in 94. (from 101 to 98)
Pump Gas Small Blocks Rock!
11.53 @ 116mph E85 408 at 8500 ft da,
3605 pound truck, 3.91s, street driven
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Re: Air and MPH
[Re: MR_P_BODY]
#2419366
12/16/17 03:57 AM
12/16/17 03:57 AM
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Joined: Jan 2008
Posts: 2,363 Cotati, CA
Dave Hall
top fuel
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top fuel
Joined: Jan 2008
Posts: 2,363
Cotati, CA
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I would add more fuel.. thats the easiest thing to do.. see what happen Don't do that in the altitude where you are at. Do that when you get back to the mineshaft...
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Re: Air and MPH
[Re: Dave Hall]
#2419376
12/16/17 04:28 AM
12/16/17 04:28 AM
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Joined: Mar 2009
Posts: 2,467 Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,467
Sydney,Australia
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I would add more fuel.. thats the easiest thing to do.. see what happen Don't do that in the altitude where you are at. Do that when you get back to the mineshaft... Dave , he lives on the coast Yes i think it needs a bit more fuel Tex
New best ET 10.259@129.65 . New best MPH 130.32 Finally fitted a solid cam, stepped it up a bit more 3690lbs through the mufflers New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm Power by Tex's Automotive
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Re: Air and MPH
[Re: ozymaxwedge]
#2419377
12/16/17 04:35 AM
12/16/17 04:35 AM
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Joined: Aug 2003
Posts: 43,228 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,228
Bend,OR USA
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Hey guys,
In the middle of Australia and the middle of the day @ 3500 ft my car ran 135mph, back on the west coast at night and 500 ft it ran 131mph, both passes 10.2. Does this tell you anything ? Needs more fuel in better air ? valve springs going bad ?
Cheers If it was mid temps. 60 to 75 F with low humidity and 29.+ barometric pressures in the middle of Australia and low temps(40 to 60 F with high humidity, low B.P. the density altitude at the coast could have been worst than in the mid part with cool dry air and higher B.P. Been there done that, moist damp air doesn't burn worth a hoot, no matter where your at Do you know the density or actual weather readings in both locations? If so post them on here so we can see it, that will help us help you Cold dry air with high B.P. readings at low altitude flat rock for drag racing
Last edited by Cab_Burge; 12/16/17 04:36 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Air and MPH
[Re: ozymaxwedge]
#2419443
12/16/17 01:18 PM
12/16/17 01:18 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
master
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master
Joined: Oct 2011
Posts: 3,036
bean town ....Ca
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Hey guys,
In the middle of Australia and the middle of the day @ 3500 ft my car ran 135mph, back on the west coast at night and 500 ft it ran 131mph, both passes 10.2. Does this tell you anything ? Needs more fuel in better air ? valve springs going bad ?
Cheers you can't base your tune-up off of an actual altitude.. always have to use the correction.. because like cab said being at a low elevation doesn't always mean the air is good.. typically going from bad air too good air you you would pick up a little.. even without making an adequate jet change.. you could be dangerously lean.. and probably wouldn't hurt to take a look at the valve springs
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Air and MPH
[Re: ozymaxwedge]
#2419457
12/16/17 01:56 PM
12/16/17 01:56 PM
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Joined: Feb 2008
Posts: 715 Central TEXAS!!!!
sr4440
super stock
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super stock
Joined: Feb 2008
Posts: 715
Central TEXAS!!!!
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you know i am not smart enough to determine if it's a ignition (detonation) or fuel issue from a single data point (car slows down in better air). since you didn't give us any O2 data, I will assume you don''t have a sensor, can you tell me what size carb and jetting along with type of cylinder heads and your ignition total timing.
Joe
Without Data, you’re just another guy with an opinion.
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Re: Air and MPH
[Re: WHITEDART]
#2419749
12/17/17 06:44 AM
12/17/17 06:44 AM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
OP
super stock
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OP
super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Hey guys,
In the middle of Australia and the middle of the day @ 3500 ft my car ran 135mph, back on the west coast at night and 500 ft it ran 131mph, both passes 10.2. Does this tell you anything ? Needs more fuel in better air ? valve springs going bad ?
Cheers you can't base your tune-up off of an actual altitude.. always have to use the correction.. because like cab said being at a low elevation doesn't always mean the air is good.. typically going from bad air too good air you you would pick up a little.. even without making an adequate jet change.. you could be dangerously lean.. and probably wouldn't hurt to take a look at the valve springs Sorry guys the 3500ft (135mph) and 500ft (131mph) are the (rounded off) air density altitude figures. Yeah I was expecting to run like 136++ but sh1t happens.... I will be pulling the heads I think and going over them, it's been a while.
Last edited by ozymaxwedge; 12/17/17 06:48 AM.
1963 Plymouth Max Wedge 1971 Barracuda
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