1/8th mile to 1/4th mile times?
02-18-2007, 02:48 PM
#1
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1/8th mile to 1/4th mile times? Is there anyway to "predict" what your 1/4 mile times would be by running an 1/8th mile... there is an 1/8th mile track out here... no 1/4 mile for awhile, just curious.... 1/8th mile track seems worthless 
02-18-2007, 02:58 PM
#3
I use one that I made up(Im sure it as already invented). Hope its not too confusing
X=1/8 time
.5(X) + X + .5 = 1/4 time
example....say you run an 8.0
4 + 8 + .5 = 12.5
X=1/8 time
.5(X) + X + .5 = 1/4 time
example....say you run an 8.0
4 + 8 + .5 = 12.5
02-18-2007, 06:33 PM
#4
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The real answer is no.
Any of 100 formulas people have come up with MIGHT get you close, but no formula can take into account everything that can happen at the big end of the 1/4 ...
Any of 100 formulas people have come up with MIGHT get you close, but no formula can take into account everything that can happen at the big end of the 1/4 ...
02-19-2007, 12:43 AM
#6
Its almost impossible to do b/c some cars are better out of the whole, and some cars have better top end then others so theirs not way to project what will happen accuratly all the time.
02-19-2007, 12:58 AM
#7
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using those formulas i got a 13.85 and 13.92 when i did calculations, but my 1/4 was actually a 13.55 so im going to say that nunuffs was closer yet still had about a 2% error
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02-19-2007, 08:37 AM
#8
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For me personally, my car runs the big end in 4.0 seconds and it picks up 30mph
every time. A 6.80 @ 102 1/8th would be a 10.80 @ 132mph in the 1/4.
1/8th x 1.565 as previously posted is a good estimate.
every time. A 6.80 @ 102 1/8th would be a 10.80 @ 132mph in the 1/4.
1/8th x 1.565 as previously posted is a good estimate.
02-19-2007, 10:01 AM
#9
Here's another real life example using the 1.565 multiplier:
1.565 * 8.26 = 12.93
Actual 12.58
...but that was on a FWD vehicle that does not get traction for a good part of the track.
1.565 * 8.26 = 12.93
Actual 12.58
...but that was on a FWD vehicle that does not get traction for a good part of the track.
Last edited by South; 03-24-2007 at 07:27 AM.
02-20-2007, 01:25 PM
#11
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Originally Posted by unit213
For me personally, my car runs the big end in 4.0 seconds and it picks up 30mph
every time. A 6.80 @ 102 1/8th would be a 10.80 @ 132mph in the 1/4.
1/8th x 1.565 as previously posted is a good estimate.
every time. A 6.80 @ 102 1/8th would be a 10.80 @ 132mph in the 1/4.
1/8th x 1.565 as previously posted is a good estimate.
The 1/8th X 1.565 is probably more accurate the better your traction is.
02-21-2007, 12:41 PM
#12
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Another real life comparison. My 4.78 1/8th X1.565 says 7.480
actual quarter mile time 7.49 so pretty close.
I also believe this will only be accurate if you have no traction troubles.
actual quarter mile time 7.49 so pretty close.
I also believe this will only be accurate if you have no traction troubles.
03-08-2007, 03:21 PM
#14
golenengineservice.com is a good site to check out. They have drag strip calulator already set up. All you got to do is fill in the blanks and their site will calculate your results for you . enjoy
03-08-2007, 05:45 PM
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ill go with no i done the 1/8 x 1.65 ive always heard this but never tried and it was .7 off from my et on the slip.but i was having traction issues with a better 60ft this calculation wouldve been closer i guess.another thing to consider most 1/8 mile cars wont even make it to the 1/4]low gears}
