ET inconsistancy,am i missing something ?
#1082764
09/25/11 11:20 PM
09/25/11 11:20 PM
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Joined: Mar 2009
Posts: 2,467 Sydney,Australia
tex013
OP
top fuel
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OP
top fuel
Joined: Mar 2009
Posts: 2,467
Sydney,Australia
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just trying to see if i am missing anything in regards to the consistancy of my satellite. in March i fitted 4.1 gears to the dana.nothing else has changed but i seem to get intermittant big swings in ET i use a performaire predictor weather station but it seems to run high/slow to the car. the worst is i have been getting not a hundredth or 2 under but up to nearly a tenth under see the attached list of ET's with DA.the main difference between 09/03 and 09/24 was 60% humidity on 09/24 to 26% on 09/03 DA on 09/24 only moved between 1300 - 1800 all day.there was about 20 - 40 minutes between most runs. should i set a new log up with only the quick runs to see what it says ? 4.10 gears fitted 08 March 2011 03/26 . ET 11.358 / DA 2094 03/26 ET 11.273 / DA 2189 03/26 ET 11.316 / DA 1971 03/26 ET 11.29 / DA 2136 06/08 ET 11.21 / DA 173 08/03 ET 11.244 / DA 1181 08/03 ET 11.189 / DA 949 08/03 ET 11.187 / DA 672 09/03 ET 11.211 / DA 1476 09/03 ET 11.142 / DA 1759 09/03 11.163 / DA 2086 09/24 ET 11.281 / DA 1475 09/24 ET 11.334 / DA 1656 09/24 ET 11.244 / DA 1307 09/24 ET 11.253 / DA 1380 09/24 ET 11.254 / DA 1540 09/24 ET 11.188 / DA 1300- 1400 = DIAL IN 11.23,solo pass 09/24 ET 11.198 / DA 1300-1400 = DIAL IN 11.18,red light 09/24 ET 11.187 / DA 1300-1400 ,grudge run
any thoughts 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: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082765
09/26/11 12:42 AM
09/26/11 12:42 AM
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Joined: Nov 2004
Posts: 3,517 pacific northwest
Stroker Scamp
master
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master
Joined: Nov 2004
Posts: 3,517
pacific northwest
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are your 60' changing too?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082767
09/26/11 12:54 AM
09/26/11 12:54 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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With that many runs on my TAG it would be within .005 on the dial prediction ... are you changing ANYTHING to the engine OR chassis on any of these runs... if you change anything that log is void and you need to start new
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Re: ET inconsistancy,am i missing something ?
[Re: MR_P_BODY]
#1082768
09/26/11 05:19 AM
09/26/11 05:19 AM
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Joined: Mar 2009
Posts: 2,467 Sydney,Australia
tex013
OP
top fuel
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OP
top fuel
Joined: Mar 2009
Posts: 2,467
Sydney,Australia
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thanks guys. no i am not changing a thing,i have seen little reason to do so.since changing the gears i started a new log - i did swap the front squirter a couple of months ago.thats it. on saturday the 60 was 1.56's early,high 1.54's last 3 runs Cab did they really say that for each meeting,dang,i thought they wanted a lot of different runs to get it right.that's what the manual said? i will try that next time i'm out,may not be till Novembers Mopar Rumble unless i get time for a T&T
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: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082770
09/26/11 09:49 AM
09/26/11 09:49 AM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Spend all your time making the 60's as consistent as possible first. The WHOLE run is set up of from your 60's. Then go on to the 330 times and see if you are hitting your 1-2 shifts accurately. If you are varying in 330, then find out why. Usually its incosistent shifting , REGARDLESS of whther or not you THINK you are hitting your shifts. A tattle tale tach has helped almost everyone that ever used it. Then watch the 330-660, your ET is all made up in the first eight mile. period. 1/8 th mile is EVERYTHING to do with your ET.
As already mentioned, is the car temp the same, tranny temp the same? Weight ( fuel?) the same.Do you stage the same, with the same procedure? The difference bewtween a full tank and half tank of gas WILL affect your ETs. Work on this stuff first. Dont worry about youe best pass, and your worst pass. Look for consistencies.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082771
09/26/11 10:26 AM
09/26/11 10:26 AM
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Joined: Nov 2006
Posts: 635 mississippi
bentwheel43
mopar
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mopar
Joined: Nov 2006
Posts: 635
mississippi
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My friend has a 1966 Satellite it has a Hemi fiberglass hood with the scoop.That car ran way off like 11.76,12.03,12.09 thin a 11.82.We were working on it and we was running out of time and didn't put the hood on and it ran 11.71,11.73 but mostly 11.72s lol He never run it with that hood again.It could be little things like that. Bentwheel43
Section 8 Racing We are nuts about racing.
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Re: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082772
09/26/11 02:19 PM
09/26/11 02:19 PM
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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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Quote:
Cab did they really say that for each meeting,dang,i thought they wanted a lot of different runs to get it right.that's what the manual said? i will try that next time i'm out,may not be till Novembers Mopar Rumble unless i get time for a T&T
Tex
Tex, what they said was to dump all the runs when I make a change to the car, motor or squirters I do a lot of testing on my car and run different tracks with severe elevation differences, 2500 FT above sea level 1/8 mile track to 180 ft above sea level 1/4 mile tracks I do keep diffeent data bases for each track but I'm dumping the runs when the weather changes a bunch, that doesn't seem to help the box get more accurate than .010 When I first started using it last year, different motor, slower, it was within .010, usually .008 or clsoer The bigger motor and testing has got it foul up, evidently My racing year is over so I will start a new data base next year, if I race much You need to work on the cars tune up to get it to not change as much , look at the jetting, timing and spark plug heat range, adjust it to get it consistent A rich tune up will change the ccars ET way more than a mixture that is dead on or a little lean don't get it to lean , That can and will hurt it, don't ask me how I know that
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: ET inconsistancy,am i missing something ?
[Re: Locomotion]
#1082774
09/26/11 07:20 PM
09/26/11 07:20 PM
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Joined: Mar 2009
Posts: 2,467 Sydney,Australia
tex013
OP
top fuel
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OP
top fuel
Joined: Mar 2009
Posts: 2,467
Sydney,Australia
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thanks guys, Bentwheel - i have a bolt on bonnet plus we cannot run without it fitted Cab,thanks for the clarification Compwedge,good thought Locomotion,no wind on Saturday. all runs had 20-40 minutes between them Tex ps did seem to be pulling hard
Last edited by Tex013; 09/26/11 07:23 PM.
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: ET inconsistancy,am i missing something ?
[Re: tex013]
#1082775
09/26/11 07:27 PM
09/26/11 07:27 PM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
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Take a good look at each incremental time and compare run to run. 60 ft? if they aren't all within .005, there is work to do with the suspension. The mph should be stable and compare to the incrementals as well. If you are seeing a lot of variance only in the 60 to 330 or 60 to 660, might be inconsistancy on the shifts if your car is leaving wheels up and it is a little tough to shift exactly the same every pass. I narrowed my ETs by .02 with an airshifter. Also any slight directional change on the return to earth will throw my ET quite a bit, like .02 or so. I do carry the fronts out to the 60 ft, which I am sure is what aggravates the problem.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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