Help, I Need Ideas!!
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Help, I Need Ideas!!
The drag strip opened here in January, the first meet I ran 12.1 @ 112 mphs. The next three trips to the strip I have lost approx. .2-.3 in ET and 4-5 miles per hour in the 1/4. My air filter was dirty as could be, so I cleaned it, then I changed my spark plugs with no help. My best time Sat was 12.36 @107.4 mph, that mph is about 4-5 low. The times in the 1/8 mile seem very close to normal, the problem seems to be in the top end I guess. Nothing has changed from the first meet, what is wrong, I can't figure it out. I guess a dyno would be the next thing to do or a cylinder compression check.
Any ideas would be appreciated. :cry :cry :cry :cry
Any ideas would be appreciated. :cry :cry :cry :cry
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From: Somers NY
Re: Help, I Need Ideas!! (wallstAL)
If your 60' times were about the same on all the runs... then you have to try & remember the weather when you ran 12.1 & the weather when you ran 12.4 Weather can mean .3 difference in ET The cooler it is the better, & Barometer also has a big effect on ET.. & MPH
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St. Jude Donor '03 through '17
Re: Help, I Need Ideas!! (Red96Coupe)
If your 60' times were about the same on all the runs... then you have to try & remember the weather when you ran 12.1 & the weather when you ran 12.4 Weather can mean .3 difference in ET The cooler it is the better, & Barometer also has a big effect on ET.. & MPH
There's your answer.
:cheers:
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Re: Help, I Need Ideas!! (wallstAL)
DA is all improtant AL.........
Tell me the date and where you ran and I will give you an approx. DA for the day.
I have seen an easy .35 between a +1400 day vs. a -700 day :yesnod:
If the 60's are the same and seems to run the same...........can't be much :cheers:
Tell me the date and where you ran and I will give you an approx. DA for the day.
I have seen an easy .35 between a +1400 day vs. a -700 day :yesnod:
If the 60's are the same and seems to run the same...........can't be much :cheers:
Thread Starter
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Help, I Need Ideas!! (ALLTHROTTLE&NOBOTTLE)
DA is all improtant AL.........
Tell me the date and where you ran and I will give you an approx. DA for the day.
I have seen an easy .35 between a +1400 day vs. a -700 day :yesnod:
If the 60's are the same and seems to run the same...........can't be much :cheers:
Tell me the date and where you ran and I will give you an approx. DA for the day.
I have seen an easy .35 between a +1400 day vs. a -700 day :yesnod:
If the 60's are the same and seems to run the same...........can't be much :cheers:
Calispeedway in Fontana
Jan. 10, 5:00 P.M.
Jan. 24, 8:30 P.M.
Feb. 28, 7:15 P.M.
April 10, 7:30 P.M.
Los Angles County Raceway in Palmdale
March 21, 9:00 A.M.
Things were normal on Jan. 10.
[Modified by wallstAL, 3:42 PM 4/14/2004]
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Re: Help, I Need Ideas!! (wallstAL)
Calispeedway in Fontana
Jan. 10, 5:00 P.M. 71.1 °F , 37.0 °F dew, 29% Hum, 29.96 in. = +854 D Density Altitude Calculation in Feet
Jan. 24, 8:30 P.M. 51.8 °F, 46.4 °F, 82%, 29.99 in. = -402 DA
Feb. 28, 7:15 P.M. 39.0 °F, 37.0 °F, 93% , 30.05 in. = -1383.6 DA GOOD AIR
April 10, 7:30 P.M. 57.9 °F , 57.0 °F, 97%, 29.94 in. = +127 DA
Los Angles County Raceway in Palmdale
March 21, 9:00 A.M. , 70.0 °F , 37.0 °, 30%, 30.08 in. = +648 DA
This does not take into effect the track elevation, just the weather.
So Al, if your 60's are close to the same your best runs should be on the - DA days.
How does it match up?
Jan. 10, 5:00 P.M. 71.1 °F , 37.0 °F dew, 29% Hum, 29.96 in. = +854 D Density Altitude Calculation in Feet
Jan. 24, 8:30 P.M. 51.8 °F, 46.4 °F, 82%, 29.99 in. = -402 DA
Feb. 28, 7:15 P.M. 39.0 °F, 37.0 °F, 93% , 30.05 in. = -1383.6 DA GOOD AIR
April 10, 7:30 P.M. 57.9 °F , 57.0 °F, 97%, 29.94 in. = +127 DA
Los Angles County Raceway in Palmdale
March 21, 9:00 A.M. , 70.0 °F , 37.0 °, 30%, 30.08 in. = +648 DA
This does not take into effect the track elevation, just the weather.
So Al, if your 60's are close to the same your best runs should be on the - DA days.
How does it match up?
Thread Starter
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Joined: Aug 1999
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Help, I Need Ideas!! (ALLTHROTTLE&NOBOTTLE)
Calispeedway in Fontana
Jan. 10, 5:00 P.M. 71.1 °F , 37.0 °F dew, 29% Hum, 29.96 in. = +854 D Density Altitude Calculation in Feet
Jan. 24, 8:30 P.M. 51.8 °F, 46.4 °F, 82%, 29.99 in. = -402 DA
Feb. 28, 7:15 P.M. 39.0 °F, 37.0 °F, 93% , 30.05 in. = -1383.6 DA GOOD AIR
April 10, 7:30 P.M. 57.9 °F , 57.0 °F, 97%, 29.94 in. = +127 DA
Los Angles County Raceway in Palmdale
March 21, 9:00 A.M. , 70.0 °F , 37.0 °, 30%, 30.08 in. = +648 DA
This does not take into effect the track elevation, just the weather.
So Al, if your 60's are close to the same your best runs should be on the - DA days.
How does it match up?
Jan. 10, 5:00 P.M. 71.1 °F , 37.0 °F dew, 29% Hum, 29.96 in. = +854 D Density Altitude Calculation in Feet
Jan. 24, 8:30 P.M. 51.8 °F, 46.4 °F, 82%, 29.99 in. = -402 DA
Feb. 28, 7:15 P.M. 39.0 °F, 37.0 °F, 93% , 30.05 in. = -1383.6 DA GOOD AIR
April 10, 7:30 P.M. 57.9 °F , 57.0 °F, 97%, 29.94 in. = +127 DA
Los Angles County Raceway in Palmdale
March 21, 9:00 A.M. , 70.0 °F , 37.0 °, 30%, 30.08 in. = +648 DA
This does not take into effect the track elevation, just the weather.
So Al, if your 60's are close to the same your best runs should be on the - DA days.
How does it match up?
On Jan. 10
12.18@111.33
On Feb. 28
12.29@107.47
On Apr. 10
12.36@107.47
See the mph drop! :confused: :confused:
Thanks!
Los Angeles County Raceway is too high!!
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Re: Help, I Need Ideas!! (wallstAL)
Hum...............Gas ok?
Is this right:
Calispeedway in Fontana, at an elevation of 1000ft
Los Angeles County Raceway in Palmdale, CA at an elevation of 2700ft
My local track is a 168ft elevation
:crazy:
Is this right:
Calispeedway in Fontana, at an elevation of 1000ft
Los Angeles County Raceway in Palmdale, CA at an elevation of 2700ft
My local track is a 168ft elevation
:crazy:
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Re: Help, I Need Ideas!! (wallstAL)
No DIC codes.................how many miles and how are the O2 sensors..........
Wife just told me her Y2K's check engine light just came on today........thanks Al :lol: Gives me a good reason to get it into the 11s :reddevil
Wife just told me her Y2K's check engine light just came on today........thanks Al :lol: Gives me a good reason to get it into the 11s :reddevil
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Help, I Need Ideas!! (ALLTHROTTLE&NOBOTTLE)
No codes, approx. 20K miles, 02 sensors should be fine, no codes.
Good Luck on your wifes problem!
Good Luck on your wifes problem!
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Re: Help, I Need Ideas!! (wallstAL)
No codes, approx. 20K miles, 02 sensors should be fine, no codes.
Good Luck on your wifes problem!
Good Luck on your wifes problem!
LS1 edit tuning?........could be KR and pulling a little timing. Will not set codes and can't always hear it either.
JJs is just a PS cat, O2 sensor , leak or connection. I have FLPs so I have been wanting a reason to yank the cats :reddevil
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Help, I Need Ideas!! (wallstAL)
After going back over all my track slips, my problem started when I changed from drag radials (315X35X17) (dia 25.7) to M/T ET Streets (26X11.5X16) (dia 26.2). The ET Streets are about 1" more in circumference and about 1/2" taller, I would not think that would be enough to cause me to drop 4 mphs in the 1/4, again maybe it would. What do you thinK??? Notice how the ET Streets really fill up the wheel wells.
Drag Radials
M/T ET Streets
[Modified by wallstAL, 1:23 PM 4/16/2004]
Drag Radials
M/T ET Streets
[Modified by wallstAL, 1:23 PM 4/16/2004]
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Re: Help, I Need Ideas!! (wallstAL)
:yesnod: :lol: :yesnod: :lol: :lolg: :lolg:
Al........ya didn't mention you had that swap goin on!
I knew I should asked that :banghead:
That is your answer :thumbs: :cheers:
The dr's also are radials and roll better than the bias plys so ever little bit makes a difference. How is the weight of each tire/rim combo......more unsprung weight will also help kill mph/et.
Al........ya didn't mention you had that swap goin on!
I knew I should asked that :banghead:
That is your answer :thumbs: :cheers:
The dr's also are radials and roll better than the bias plys so ever little bit makes a difference. How is the weight of each tire/rim combo......more unsprung weight will also help kill mph/et.
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From: Somers NY
Re: Help, I Need Ideas!! (ALLTHROTTLE&NOBOTTLE)
The ET Streets are lighter than the radials... the size WILL make a difference... with 26.6" tires I was going 107 - 109 mph after I put on 28" tires my MPH went to 104 - 105 ...
I finally switched back to radial 26.4 (315x17) BFG & my MPH is back to 108..
I finally switched back to radial 26.4 (315x17) BFG & my MPH is back to 108..
Thread Starter
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From: GARDENA Ca, State Of Konfusion
St. Jude Donor '05
Re: Help, I Need Ideas!! (ALLTHROTTLE&NOBOTTLE)
:banghead: :banghead: :banghead: :banghead: :banghead:
I never had any idea the M/T would cause me to lose that much in mph and a little in ET's :mad :mad :mad Only compensation is that M/T's hook very consistantly.
The M/T weigh 12 lbs less than the 17X11 drag radials X2=24 lbs.
Thanks for all your help!!!!!!!
I never had any idea the M/T would cause me to lose that much in mph and a little in ET's :mad :mad :mad Only compensation is that M/T's hook very consistantly.
The M/T weigh 12 lbs less than the 17X11 drag radials X2=24 lbs.
Thanks for all your help!!!!!!!