Another ET/MPH Question...

[Sinful6]

All things equal, what does 1mph equate to in ET(1/4 and 1/8)? Granted I know there are some variables, but I'll geuss .2-.3s? Or is this impossible to do?

 

[VictoryTrans]

I always went by the rule.....10hp=1mph=1/10sec...it may be off, buts its the closest rule of thumb that I know of

 

[TylerDurden]

tony you forgot the "1 full turn=1 LB BOOST"=10 hp=1 mph=.1 ET
dan

 

[GNsQuick]

I agree with all of the above!

 

[Scott231]

Just note that the rules of thumbs are relative to a car's overall performance. For instance, to increase you quarter mile MPH from 64 to 65, will not lower your ET by 1 tenth of a second. Conversely, going from 124 to 125 prolly will. FFT

 

[Sinful6]

So is about 20 a good number to use to convert 1/8mi MPH and 1/4mi. MPH?

 

[Scott231]

For a ten-second turbo regal, yes. (I do 100-102 in the 1/8 and 122-124 in the quarter, on average).

 

[VictoryTrans]

I've actually heard 20 and 25 mph.....but it seems that the 25 is more accurate for the slower cars, and the 20 is more accurate for cars 10's or faster

 

[Sinful6]

Well, using this "rule", one of my cars trapped 86.24 in the 1/8mi. so, my 1/4mi. should be ~111mph(and high 11sec 1/4mi.)? That seems alittle quicker tthen I would have thought, using the other as a constant(20mph) I would have about 106mph trap speed. Which seems closer.

 

[LIVE4MPH]

1/8 mile mph* 1.25-1.27 should get you close to 1/4 mile mph.

1/8 mile ET* 1.58 should get you close to 1/4 mile ET. The multiplier can vary greatly depending on the car setup and launch, but a TR that hooks well should be around 1.58

also people that lock their converters have a higher mph multiplier since the converter is locked for the 3rd gear pull to the traps.

hth

 

[Raymond Bunch]

Hey Fellas

My god, you guy's are to technical! I just go by what's on the time slip. Maybe one day I will learn all this stuff, maybe.

 

[REDS HOT AIR]

my turn to mess it all up..

my last pass was 100.78 in the 1/8 and 127 in the 1/4

next pass better be good with all the work im doing on it now

 

[Sinful6]

reds, what was your 60' on that pass? Seems like it was really traction limited.

 

[REDS HOT AIR]

1.84 60 ft but it did not spin at all

i came out the gate at 0 boost with 2800 converter and 70 turbo so it didnt hit boost good till about the 60 ft mark