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Author Topic:   1/8 to 1/4 conversions
n2oMike
Gearhead

Posts: 1511
From: Spencer, WV
Registered: Jan 2001

posted 09-18-2001 10:03 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
If you run at a 1/4 mile track that gives both the 1/8 and 1/4 mile times, you can come up with a conversion that works pretty well for your car.

To do this, just take the 1/4 mile time and divide it by the 1/8 et.

For example... 12.63/8.0 = 1.58

To get your estimated 1/4 et from the 1/8 mile time, multiply by 1.58

To get the 1/8 et from the 1/4 mile time divide by 1.58

My car, and most other street cars on slicks seem to hover around a conversion factor around 1.57-1.58.

Happy Calculating...

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Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.geocities.com/motorcitymustang/cmml/cmml_mburch.html
http://www.fortunecity.com/silverstone/healey/367

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kid vishus
Gearhead

Posts: 4357
From: middle of NC
Registered: Oct 2000

posted 09-18-2001 05:53 PM     Click Here to See the Profile for kid vishus   Click Here to Email kid vishus     Edit/Delete Message   Reply w/Quote
Another one that works, is to add .24 to your 1/8 mile times, then divide by .655.

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Moneymaker
Administrator

Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 09-18-2001 07:43 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
That one is fairly accurate Rob. Within 1% I'd say.

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Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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