1/4 et's vs 1/8 et's and mph (moved this from Gen. Disc.)

Old 03-31-2009, 04:37 PM
  #1  
ogles824
Member
MASTER JOURNEYMAN
Thread Starter
 
Join Date: Aug 2007
Posts: 45
Default 1/4 et's vs 1/8 et's and mph (moved this from Gen. Disc.)

I'm looking at a ealry 70's Nova roller to build up for my son's first drag car. It's a really basic ride which makes it perfect for some one just starting out. I grew up running quarter mile tracks and we have been hitting some of the 1/8 mile tracks in our area just to keep the excitement level at a fever pitch. The closest quarter mile track is a bout 75 miles away and I have two 1/8 mile tracks about 30 to 35 miles away so we will be running 1/8 mile. I'm just not all that familure with what horsepower numbers translate into on the 1/8 mile, but if you take me to a 1/4 mile track I can usually come pretty close to guessing the time if I know what the HP numbers are, car, trans, the usual stuff. The car we are looking at has the interior removed, a 10 point cage, a 9 inch ford rear with leafs and slapper bars and probably guessing, 10.5 slicks around 28 to 29 inches in height. I think it's all steel except the hood. I am looking at a Scott Schaferoff 402 in/ 465hp SB engine for this car and a glide combo with the optium torque converter and rear gears for this set up. What kind of numbers (time and speed) should she put out on the 1/8? We are about 450 to 550 above seal level.
ogles824 is offline  
Old 04-02-2009, 07:06 AM
  #2  
TheEngineer
Senior Member
MASTER BUILDER
 
TheEngineer's Avatar
 
Join Date: Sep 2007
Location: Moore Oklahoma
Posts: 129
Default

FYI. Typically most drag cars make 64% of your 1/4 mile ET in the first 1/8 mile (660 ft).

Therefore, you just multiply your 1/4 mile ET by .64 and that will give you the approximate 1/8 mile ET.

For example; 10.00 1/4 mile car (10.00 x .64) would be around 6.4 in the 1/8 mile.

WD
TheEngineer is offline  
Old 04-02-2009, 10:07 AM
  #3  
zipper06
Senior Member
RACING JUNKIE
 
Join Date: Jan 2006
Location: La.
Posts: 2,890
Default

Here's a conversion caculators site that you can convert from 1/4 to 1/8 plus many other formula's.

Zip.

http://www.wallaceracing.com/Calculators.htm
zipper06 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service