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track times dont add up 

 

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 Post subject: track times dont add up
Posted: Sun Sep 14, 2008 11:10 am 
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WTF is going on here my 60ft times get better as night goes on and times just get s**t. i didn't miss any gears and the clutch only slipped a little bit the most it slipped was on my 2nd run which was the second fastest. i read the slips and it doesnt add up i got mph to run 15.3. the 60ft time to do 14.80's but im getting sixteens and its REALLY PISSING ME OFF. wtf is going on here

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Posted: Sun Sep 14, 2008 10:42 pm 
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I think your car is probably very tired or has some other issue that is causing it to be down on power.
You haven't said what car it is either.

It all seems to add up to me, nothing stands out.
Don't think you'll get a 15.3 with only 84-85mph in an E-Series personally.

 

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Posted: Sun Sep 14, 2008 11:02 pm 
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terminal speed is consistent with all 4 runs, so im guessing a 15.8 might be possible with how it is now?
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Posted: Tue Sep 16, 2008 10:16 pm 
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el manual poverty pack with big heavy cow catcher(bullbar) on the front. didnt miss any gears and i would have thought if clutch was slipping it would have done it most on the start. motors done alot of k's 300+ its got pacies 4480 extractors 2 1/2 in redback exhaust. it got s**t 3.08 diff gears .what i dont get is normally when your 60ft gets quicker your overall time does to but its done the opposite.

 

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Posted: Tue Sep 16, 2008 10:43 pm 
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I'm guessing by the times the first 3 were consecutive runs?
Probably going slower because of heatsoak, you can see the MPH drop.
Your last run you ran 85mph again, just stuffed up the launch with a 2.5 60'

 

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Posted: Tue Sep 16, 2008 11:00 pm 
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yeah they were consecutive runs i never thought of heat soak we did let it cool for a while. i just cant believe how my 60ft get better but times got slower. i was surprised with the last run it felt heaps quicker but was actually a s**t time. gunna get rid of me cow catcher and get some 3.45:1's ill just get a single spinner cause i got an lsd centre sitting on work bench then take it back to run a 15

 

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 Post subject: Re: track times dont add up
Posted: Thu Feb 05, 2009 2:46 pm 
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Well bullbar is gone :lol: umm, well what can i say, pulled out spare tire sub woofer jacks and ran a 16.4 same sorta mph. been a bit lazy havent got 3.45s lol, wasnt too impressed i would have hoped for at least an 16.2 cause then i woulda been a bit closer to running a 15. maybe i should convince my gf to try it lol, a mate let a girl who happened to be a friend, race his vr commo and the best he could do was 16.2 and then she went 15.9 :| funny as at the time. maybe i should go on a diet to reduce overall weight of the car or just up the power.

 

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 Post subject: Re: track times dont add up
Posted: Thu Feb 05, 2009 3:10 pm 
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motor might be tired after all those km's, maybe headgasket is fooked too?

try a major service, like reco injectors, fuel filter, plugs, leads, check compression etc.
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 Post subject: Re: track times dont add up
Posted: Thu Feb 05, 2009 4:05 pm 
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how do you launch? do you tag the rev limiter at all? heaps of variants that get thrown up, what suspension? etc...

 

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 Post subject: Re: track times dont add up
Posted: Wed Feb 11, 2009 9:32 pm 
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half a second was the difference between summer and winter with my old ef before i got the cam installed.
im hoping its the same with my xr6 turbo :D

 

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 Post subject: Re: track times dont add up
Posted: Fri Feb 13, 2009 12:11 pm 
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clutch slipping as it gets hot? not shifting as well?

my au when stock went 2.6s/89mph/16.5 ET for comparo and thats an auto.

and the auto wasnt/isnt in very good nick.

 

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 Post subject: Re: track times dont add up
Posted: Fri Feb 13, 2009 3:05 pm 
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back in the day i had a stock au futura auto, it ran a 15.9 in the cool, 16.3 in heat.
the weather really does make a difference.

your times almost seem like somethings out.... like fuel, or plugs, or a sensor... how does it rev? does it struggle over 4000rpm?

 

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 Post subject: Re: track times dont add up
Posted: Fri Feb 13, 2009 3:18 pm 
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smoke_ wrote:
back in the day i had a stock au futura auto, it ran a 15.9 in the cool, 16.3 in heat.
the weather really does make a difference.

your times almost seem like somethings out.... like fuel, or plugs, or a sensor... how does it rev? does it struggle over 4000rpm?

More info on your 13.6!
What'd you 60' it at? You manage to get a 2.0?

 

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 Post subject: Re: track times dont add up
Posted: Fri Feb 13, 2009 3:23 pm 
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its just a stock BF XR6 turbo, 6spd auto.
i'm lookin at my timeslip, i got a 2.125 60ft.
ambient temp - 22 deg, 82% humidity, track temp 31 deg.

Whats the ute run?

 

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 Post subject: Re: track times dont add up
Posted: Fri Feb 13, 2009 4:32 pm 
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13.55 @ (from memory) 107mph was the best, did mostly 13.6-7s all night though.
thats why I asked, your making me look bad :P
2.1ish 60's as well, was a hot night, probably similar to yours.
f**k me dead, I think I gotta get out to calder once it cools down, can't have XR6Ts running with me :evil:
And Mitch told me you couldn't drive for s**t, he must have been lying :P

 

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