eighth mile to quarter mile conversion question
10-06-2001, 06:58 PM
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eighth mile to quarter mile conversion question
since my local quarter mile track has shut down for the year i have been going to
some eighth mile tracks. my car ran a 1.78 60 foot/ 7.21 at 103 mph.could anyone with experience drag racing hondas give me a close estimate on my quarter mile time
some eighth mile tracks. my car ran a 1.78 60 foot/ 7.21 at 103 mph.could anyone with experience drag racing hondas give me a close estimate on my quarter mile time
10-06-2001, 10:35 PM
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Re: eighth mile to quarter mile conversion question (On Point)
its way to hard to say, all cars are different.. A supra that does a 7.2 1/8 could possibly break 10's.. but a Mustang GT w/ Nos or sumthin may run low 12's... Id like to guess u r inbetween, somewhere in the 11's..
10-07-2001, 05:55 AM
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Re: eighth mile to quarter mile conversion question (On Point)
car has a 2.3 v-tec running a fully upgraded t3/t4e. it has allready been 11.87
running very bad. car runs great now so it should be much faster than this.
running very bad. car runs great now so it should be much faster than this.
10-07-2001, 06:55 AM
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Re: eighth mile to quarter mile conversion question (speedworks)
This has nothing to do with your question but I wanted to add a formula I use to find out whp by using ET and trap speeds. Its not 100% accurate but it sometimes comes out close.
(MPH^2 / ET) * (total weight/1000) / 9.1 = Horsepower to the wheels.
(MPH^2 / ET) * (total weight/1000) / 9.1 = Horsepower to the wheels.
10-07-2001, 05:34 PM
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Re: eighth mile to quarter mile conversion question (Arturbo)
This has nothing to do with your question but I wanted to add a formula I use to find out whp by using ET and trap speeds. Its not 100% accurate but it sometimes comes out close.
(MPH^2 / ET) * (total weight/1000) / 9.1 = Horsepower to the wheels.
(MPH^2 / ET) * (total weight/1000) / 9.1 = Horsepower to the wheels.
(85^2/16.0) * (app. 2900/1000) / 9.1 = 143.9 is what i got.. it should be about 110-115 in a LS w/ IE and 17's..
[Modified by DIRep972, 2:36 AM 10/8/2001]
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10-07-2001, 08:13 PM
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Re: eighth mile to quarter mile conversion question (speedworks)
This is a rough estimate, but is usually very close.
For those of you who have a timeslip with both 660' and 1320' times and speeds, give it a try and see. The only cars I've seen a with big variance in this guestimate is AWD cars. They usually have much better 1/8 mile times and slower than expected in the quarter mile due to the better than average 60' times. For those cars, the ".65" in the formula is usually modified to a .62 to .64 or so.
1/4 mile to 1/8 mile e.t. conversion:
1/4 e.t. * .65 = 1/8 e.t.
1/4 mile mph to 1/8 mile mph conversion:
1/4 mph * .8 = 1/8 mph
so...
1/8 mile to 1/4 mile e.t. conversion:
1/8 e.t. / .65 = 1/4 e.t.
1/8 mile mph to 1/4 mile mph conversion:
1/8 mph / .8 = 1/4 mph
From this, I'd guess you'd pull a 11.092 @ 128.75 mph in the 1/4!
That's an awesome ride speedworks! Congrats!
For those of you who have a timeslip with both 660' and 1320' times and speeds, give it a try and see. The only cars I've seen a with big variance in this guestimate is AWD cars. They usually have much better 1/8 mile times and slower than expected in the quarter mile due to the better than average 60' times. For those cars, the ".65" in the formula is usually modified to a .62 to .64 or so.
1/4 mile to 1/8 mile e.t. conversion:
1/4 e.t. * .65 = 1/8 e.t.
1/4 mile mph to 1/8 mile mph conversion:
1/4 mph * .8 = 1/8 mph
so...
1/8 mile to 1/4 mile e.t. conversion:
1/8 e.t. / .65 = 1/4 e.t.
1/8 mile mph to 1/4 mile mph conversion:
1/8 mph / .8 = 1/4 mph
From this, I'd guess you'd pull a 11.092 @ 128.75 mph in the 1/4!
That's an awesome ride speedworks! Congrats!
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