[Dragster525]

I run low 5.20's in 1/8. Most of the conversion charts say I should be running 8.10's in quarter but I run 8.30's. Not sure what that is telling me. Charts are wrong or my setup is not working as well in quarter?

 

[70novaguy]

i just finished my car this fall and only made it to a 1/4 mile test n tune and then an 1/8 mile race. the converter i used is way too tight and barely stalls at all. the car kept running quicker the more i ran it. on thursdays test n tune it went 7.27 in the 1/8 and 11.35 in the 1/4, then by sunday it was running 7.13 in the 1/8. anyway multiplying the 7.27 by 1.56 was almost spot on for my run, so i used it to figure out i probably would of been running 11.12 in 1/4 on sunday which would of been close to my 10 sec. goal.

 

[gws64gto]

Way off on our car. 1.54 seems to work the best.

1.54 is pretty dead on.

 

[Gtdhw]

x1.57 is dead on for me

8.00/12.56

&

6.60/10.36

I run 1/8 all year in both cars. Then in Indy (ET Finals), I run 1/4 in Sportsman and have ran 12.56.
The only two 1/4 passes in my S/P car were 10.36 & 10.38.

Dead on.

 

[DaveyN]

1.58 is pretty dead on for my car...on the charts the 1/4 mile side usually is a bit optimistic...

 

[n5ifi]

http://cochise.uia.net/pkelley2/eight-to-quarter.htm

 

[pro382d]

Dammit.... I typed my 1/8th mile ET and mph ..... when I hit calculate its said ......"you know it will kick the rods out before it gets that far dummy"

 

[double11]

1.572 seems to be the multiplier for my bracket car

6.67 1/8 to a 10.49 1/4

 

[richie webb]

I run low 5.20's in 1/8. Most of the conversion charts say I should be running 8.10's in quarter but I run 8.30's. Not sure what that is telling me. Charts are wrong or my setup is not working as well in quarter?

I am running low 5.20s as well in 1/8th but 8.02 best in 1/4

cheers Richie

 

[Dodge 330]

Dammit.... I typed my 1/8th mile ET and mph ..... when I hit calculate its said ......"you know it will kick the rods out before it gets that far dummy"

Shit, I thought I was the only one!

 

[MIGHTY6]

X 1.56 for me and is dead on.

 

[prost63vette]

Way off on our car. 1.54 seems to work the best.

X2

 

[Rodchucker]

1.574 works dead on for me.

 

[Skeeter#C144]

I have to go with 1.59 on my little truck only because its geared more for the 1/8 and it not very aerodynamic. 6.09x1.59=9.68

 

[6Volt]

The most accurate way of coming up with 1/4 mile times from 1/8 miles times for several different combinations is to divide the 1/8 Mile time by the 330' time, then multiply that by the 1/8 mile time. Every combo will be different so this gives you one formula to base off of until some full 1/4 miles passes are made to check the ratio.

 

[71 NOVA 632]

my nitrous car ran 3.08 4.68 150 mph 1/8 7.23 191mph 1/4 now it runs 2.95 4.47 162 mph in the 1/8 . what would it run in the 1/4 now ?

 

[Rene's Rage]

my nitrous car ran 3.08 4.68 150 mph 1/8 7.23 191mph 1/4 now it runs 2.95 4.47 162 mph in the 1/8 . what would it run in the 1/4 now ?

6.92
Your's seems to be multiply by 1.55.

 

[Rene's Rage]

I think the chart I posted is for N/A cars.
I've been going by this chart for almost 30 years.
Not a lot of nitrous cars and very few turbo cars back then.

 

[stkjock]

I wonder when the last time the Wallace calc was updated.

IMO - 1.55 for a blower/turbo car is a good ratio and 1.57/8 for a N/A car.

my $.02

The most accurate way of coming up with 1/4 mile times from 1/8 miles times for several different combinations is to divide the 1/8 Mile time by the 330' time, then multiply that by the 1/8 mile time. Every combo will be different so this gives you one formula to base off of until some full 1/4 miles passes are made to check the ratio.

that's an interesting formula - thanks

 

[Rene's Rage]

The Wallace never came out right for me on any of their calculators.