Drag Racing Technique Improve your track times

Any Way To Calculate 1/4 ET From Just 1/8 MPH?

Thread Tools
 
Search this Thread
 
Old Apr 18, 2003 | 04:27 PM
  #1  
COMNBYU's Avatar
Thread Starter
Registered User
 
Joined: Dec 2002
Posts: 480
Any Way To Calculate 1/4 ET From Just 1/8 MPH?

Here's what Ive got, my car ran the time in sig last weekend with my new plate set up. The passes were pretty conservative as you can tell by the 60ft.

But 8.1 @ 92 in the 1/8 is just plain ****-poor. That much MPH is just crazy for the ET. I was cutting 1.7 60fts before my N2O backfire, when I was much more agressive with the launch.

My 1/4 only trapped 113 because I had to let off between the 2-3 shift. I think I prolly could have gotten another 1-2 MPH if not for that.

I compared my slip to a friend who has a '00 SS with 3.73s with a simular set up to mine, and he went a 7.7 @ 90 in the 1/8 and 11.9 @ 114 in the 1/4.

So I'm trying to get an idea of what my car has got left in it with that 1/8 MPH, since that seems to be the only thing "on par". Anyone got any ideas??



TIA, Jon
Old Apr 18, 2003 | 05:21 PM
  #2  
TedH's Avatar
Administrator
 
Joined: Mar 1999
Posts: 3,664
From: Brunswick, Maine 04011
General rule of thumb is the 1.8 mile ET time 1.55, but it does't sound like that is going to be very helpful. I run 11.8-12.0 at around 110-112 normally. My 1/8 mile speeds are usually 88-89. However my 1/8 mile ET's are usually 7.5's with high 1.5 or low 1.6 sixty foot times.

Last edited by TedH; Apr 18, 2003 at 05:25 PM.
Old Apr 18, 2003 | 05:47 PM
  #3  
COMNBYU's Avatar
Thread Starter
Registered User
 
Joined: Dec 2002
Posts: 480
Originally posted by tnthub
General rule of thumb is the 1.8 mile ET time 1.55, but it does't sound like that is going to be very helpful. I run 11.8-12.0 at around 110-112 normally. My 1/8 mile speeds are usually 88-89. However my 1/8 mile ET's are usually 7.5's with high 1.5 or low 1.6 sixty foot times.



Yea, see, you've got good 60s. It's all about that 60ft. If that's bad, everything concerning the ET will be off through the entire run, even though the MPH will be good.

I was thinking if I could get back down to 1.7s, that's .4 quicker in the 60ft than what I'm cutting now. Theoretically, that would be a HUGE gain in the 1/4 ET.

I'm mainly trying to figure out if I can get 11s like it is. I would think at least low 12s, but I want some other opinions...




Jon
Old Apr 20, 2003 | 08:39 PM
  #4  
jeff1586's Avatar
Registered User
 
Joined: Apr 2003
Posts: 87
From: Shreveport LA
http://members.optushome.com.au/iroc...v/convert.html
This is a site for a 1/8 to 1/4 mile conversion chart
Old Apr 22, 2003 | 11:10 AM
  #5  
COMNBYU's Avatar
Thread Starter
Registered User
 
Joined: Dec 2002
Posts: 480
Originally posted by jeff73
http://members.optushome.com.au/iroc...v/convert.html
This is a site for a 1/8 to 1/4 mile conversion chart




Yes, but I need to try and calculate from the 1/8 MILE PER HOUR, not the ET. That chart, unfortunately, won't do me one bit of good.

Obviously, I'm runing faster than what the chart says- Chart: 8.1 in the 1/8 translates into 12.6 in the 1/4. I went a 8.1 & 12.4.


It's all about the 60 and the MPH




Jon
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
9t4lt4z28
LT1 Based Engine Tech
1
Oct 2, 2015 10:28 AM
KYWes
LT1 Based Engine Tech
5
Sep 26, 2015 08:49 AM
HAWG
Drag Racing Technique
2
Sep 25, 2015 11:41 AM
leftclixLS3
2010 - 2015 Camaro Technical Discussion
1
Sep 17, 2015 03:12 PM




All times are GMT -5. The time now is 07:55 PM.