Maryland Cherokee Club
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
of course i didnt factor that. if you want an exact measurement, get a tape measure. i know that tires arent always exactly what they say. im giving people mathematical tools to figure this out for themselves.
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
225/75r15 = 168.75mm sidewall x 2 = 337.5mm which is 13.29 inches + 15 inch rim = diameter of 28.29 inches.
circumference = 3.14(diameter)
3.14(28.29) = 88.8306 inches per revolution
235/75r15 = 176.25mm sidewall x 2 = 352.5mm which is 13.88 inches + 15 inch rim = diameter of 28.88 inches.
3.14(28.88) = 90.6832
new distance/old distance = percent increase
90.6832/88.8306 = 102.08554259455638034641215977377 percent.
your odometer is 2% off. so 300 miles = 306 miles.
circumference = 3.14(diameter)
3.14(28.29) = 88.8306 inches per revolution
235/75r15 = 176.25mm sidewall x 2 = 352.5mm which is 13.88 inches + 15 inch rim = diameter of 28.88 inches.
3.14(28.88) = 90.6832
new distance/old distance = percent increase
90.6832/88.8306 = 102.08554259455638034641215977377 percent.
your odometer is 2% off. so 300 miles = 306 miles.
Calm down there, buddy. No need to hurt yourself.
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
First, you took two estimated numbers (circumferences), and made a very precise percentage from them.
Second, I don't think anyone here can get a 29 decimal precise reading from a tape measure.
However, I think we can both agree shut up, Justin.
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
I'm just saying there were two problems:
First, you took two estimated numbers (circumferences), and made a very precise percentage from them.
Second, I don't think anyone here can get a 29 decimal precise reading from a tape measure.
However, I think we can both agree shut up, Justin.
First, you took two estimated numbers (circumferences), and made a very precise percentage from them.
Second, I don't think anyone here can get a 29 decimal precise reading from a tape measure.
However, I think we can both agree shut up, Justin.
but yes...
I LOVE LAMP
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
CF Veteran
Joined: Aug 2011
Posts: 4,323
Likes: 0
From: New Market
Year: 1998
Model: Cherokee
Engine: 4.0L I6
Originally Posted by jakbob
yeah, but what i was saying is that he doesnt what directly caused the change because so many things were changed out. shirley thinks that just that CAI will net the same gains as scott... im trying to get numbers out there for people
CF Veteran
Joined: Oct 2009
Posts: 2,300
Likes: 0
From: Alaska
Model: Cherokee
I havent come up with a concrete figure yet, but I am thinking in the neighborhood of 3-4 bills for everything welded and ground and ready for paint. That being said if the person helps I would knock it down considerably. At the least I am thinking $100 for the templates or same value in desirable trade. I am hoping to turn the rear bumpers out quick with a tire swing once I finish getting mine built and put it through testing. I will post it up in my sig when I get everything figured out
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0
CF Veteran
Joined: Feb 2012
Posts: 5,153
Likes: 0
From: Crofton, MD
Year: 1992
Model: Cherokee
Engine: 4.0 I6, 62mm BBK Throttle Body w/ 1" Spacer, Rusty's Airtube w/ 9" K&N Conical
CF Veteran
Joined: Feb 2012
Posts: 6,468
Likes: 18
From: Forest Hill, Maryland
Year: 1998
Model: Cherokee
Engine: 4.0L
. I believe the youngins that got this started have left the room...LOLbest way to figure out exact numbers when it comes to gas is this;
fill up till the pump clicks off. next time, fill up till the pump clicks off. note how many gallons. if you add in between, it skews your numbers because you dont know how much is actually left in the tank. a half gallon can go another 8 miles depending on your mpg.
exactly. pretty much drag coefficient, rolling resistance, weight.
sorry... i cant let my skills shine?
fill up till the pump clicks off. next time, fill up till the pump clicks off. note how many gallons. if you add in between, it skews your numbers because you dont know how much is actually left in the tank. a half gallon can go another 8 miles depending on your mpg.
exactly. pretty much drag coefficient, rolling resistance, weight.
sorry... i cant let my skills shine?
you lucky bum. I think if I ever chop my cherokee it will be like this one. maybe with a fold-down windshield or something, and a bikini top!
Last edited by kuzican; May 10, 2012 at 03:01 PM.
CF Veteran
Joined: Dec 2011
Posts: 4,006
Likes: 1
From: Pasadena, MD
Year: 1987
Model: Wagoneer
Engine: Renix 4.0