1/8th to 1/4

FoxRod87

Active Member

Feb 1, 2006

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Carolina

Dec 18, 2006

#1

• Dec 18, 2006

• #1

My buddy has an 03 mach I with just gears and exhaust and he run it in an 1/8th and run a 7.79 at 88 what would this be in a 1/4 mile.

 

LaserRed01GT

Banned

Oct 3, 2006

739

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Clearwater, FL

Dec 18, 2006

#2

• Dec 18, 2006

• #2

The NHRA conversion is to mulitply the ET b 1.55. There really isn't a general rule of thumb to convert the MPH. 88 MPH in the 1/8th sure is a strong number for a 03 Mach 1 with just gears and exhaust.

 

BurningRubber

10 Year Member

Dec 6, 2004

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Dec 18, 2006

#3

• Dec 18, 2006

• #3

I dont think that Mach is running 7.79 in the 1/8th w/ just gears and exhaust. Thats somewhere around a 12 flat in the 1/4 mile.

 

helty

some Ukrainian's enjoying a handjob via my credit

Mar 30, 2005

1,461

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Baltimore, MD

Dec 18, 2006

#4

• Dec 18, 2006

• #4

maybe 8.79, definitely not 7.79.

theres not magic forumula, no special calculator that will give you a real accurate 1/8 to 1/4 conversion. They may give you a rough idea, but there are way to many variables to consider.

 

Stan Weiss

Member

Dec 8, 2006

347

2

16

Philadelphia, PA

Dec 18, 2006

#5

• Dec 18, 2006

• #5

I will guess 12.20 at 108 MPH. That said what was his 60 foot time? What kind of rear tires was he running? What gear ratio did he have in the rear?

 

FoxRod87

Active Member

Feb 1, 2006

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Carolina

Dec 19, 2006

#6

• Dec 19, 2006

• #6

weld prostars with 26x11.5 et streets, and 4.30s . 60ft was 1.64 spinning. and yes it was 7.79 at 88.

 

Stan Weiss

Member

Dec 8, 2006

347

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Philadelphia, PA

Dec 19, 2006

#7

• Dec 19, 2006

• #7

That is a pretty good 60 foot time. Based on that with the other times his 1/4 time maybe closer to 12.3-12.35.

 

LaserRed01GT

Banned

Oct 3, 2006

739

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Clearwater, FL

Dec 19, 2006

#8

• Dec 19, 2006

• #8

Very impressive 60 footer and 1/8 mile numbers. The 4.30's and the ET streets earned him the good little end numbers.

 

R

rogers

Founding Member

Feb 25, 2002

339

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Dec 19, 2006

#9

• Dec 19, 2006

• #9

Your buddy need to get the 60's on down. Get the ET Street off and put a set of 26x10 ET Drags. What's done to the suspension? If you can get your buddy on here I would like to know his launch and shift RPM. Also how much air pressure was he running in the ET Streets.

 

mustangman9812

10 Year Member

Jan 14, 2004

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Mars Hill, NC

Dec 19, 2006

#10

• Dec 19, 2006

• #10

Wow I want a Mach 1 :<

 

crzyhrse99

Active Member

Mar 30, 2005

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Kansas

Dec 19, 2006

#11

• Dec 19, 2006

• #11

http://www.eldemoniorojo.com/calculator.htm

Like someone else said, too many variables .....but heres an estimated chart.

 

Gearbanger 101

Straight Outta Locash

20+ Year Stangneter

Aug 10, 2002

9,457

1,377

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Ontario, Canada

Dec 19, 2006

#12

• Dec 19, 2006

• #12

rogers said:

Your buddy need to get the 60's on down. Get the ET Street off and put a set of 26x10 ET Drags. What's done to the suspension? If you can get your buddy on here I would like to know his launch and shift RPM. Also how much air pressure was he running in the ET Streets.

Click to expand...

Yeah....cause a 1.64 60ft time just sucks.

 

propellerhead

New Member

Apr 13, 2004

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&quot;but what's with the but shots?&quot;

Dec 19, 2006

#13

• Dec 19, 2006

• #13

I've seen multipliers of 1.56, 1.57 and 1.58.

 

LaserRed01GT

Banned

Oct 3, 2006

739

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Clearwater, FL

Dec 19, 2006

#14

• Dec 19, 2006

• #14

Yeah, I have seen quite a few different variances of the multipliers throughout different NHRA and IHRA literature as well. But they are just to roughly estimate what your 1/4 ET would be, and if we take them to mean just that they are a pretty good tool.

Only thing is they don't account for alot of the variables like has already been noted. It is not uncommon for a relatively stock car to rip some awesome 60 ft, 330 ft, and 1/8 mile numbers, especially with alot of gear and slicks. The big end of the 1/4 is where the HP really factors in. So if this same guy were to run an actual 1/4 mile, he might actually be more in the upper 12's.

Nevertheless, he has a car that is digging pretty hard for a relatively unmodded chassis/suspension.

 

R

rogers

Founding Member

Feb 25, 2002

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Dec 19, 2006

#15

• Dec 19, 2006

• #15

Gearbanger. A 1.64 does suck when you go 1.25-1.28 on average.

If the car has any suspesion mod it should go 1.55-1.58. But alot depend on getting the car to hook. The track prep, tires, suspension adjustment, etc, etc. He would see alot of improvement by getting a real set of slicks:nice. I have never had any luck with the ET Street.

 

FoxRod87

Active Member

Feb 1, 2006

243

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Carolina

Dec 20, 2006

#16

• Dec 20, 2006

• #16

The et streets are what he drives on the street with and yes slicks would do better, and also the track sucked that day. He never got a good burnout the rearend wanted to keep going to the left. It just barely started to smoke the tires.