lemme know how two bucks feels and where you do it.[/QUOTE

I've got a fresh set of G-forces going on today with my HREs, so give me a chance to get to a safe place and I'll have my crazy buddy try to snap a couple of shots with the speedo pinned.

moving on,
JB

 

Yet another incorrect blanket statement. Some tires do change their circumference quite dramatically. Have you never watched drag racing? Take a look at cars on drag slicks. Some of the tires grow enough that you can see it with your eye. Others wil grow enough to rub on the fender lip at speed even thought they have lots of room when sitting still.

 

to put it simple in physics 101 terms...
the theoretical max speed of each gear is dictated by gearing ratios
The HP and tq will is what will dictate how close you come to attaining
you theoretical maximum speed :flag


[Modified by tslawsky, 11:36 AM 4/6/2002]


[Modified by tslawsky, 11:42 AM 4/6/2002]

 

Paul,
What you are referring to the is the a drag racing tire “lifting up” on it’s sidewall. This is not growing the circumference of the tire. What is occurring here is that a tire, especially a bias ply slick is not a perfect circle when the car is at rest. Rather it is deformed where the tire sags at the weight of the car pushes it on the ground. As centrifugal force spins the tire, it lifts up off the ground and forms a circle. The height from the ground to the top of the tire does increase because the sidewall is less bowed, however, this does not grow the circumference of the tire, especially on steel belted radials. Where this to happen the tire would have to be elastic to grow the circumference.
You obviously do not understand what the tire height piece of the speed equation is for. The constant (336.1352398) is the product of the formula for multiplying out the diameter into a circumference x revolutions over one hour. Thus you have distance per hour. What this means is that the diameter really is not what you are looking for, you’re actually looking for the circumference, as that will dictate how many inches the car travels on one revolution of the car’s tire. Since Diameter is a variable, but the rest of the formula is a numerical constant, it’s easier to present that formula in the form of a multiplier. Again what you are doing is finding out the number of times the tire spins in one hour, since you know what the circumference is, you know how far the car travels in one hour.
In order for a tire to grow it’s circumference, you would be trying to stretch not just the rubber of the tire, but the steel and Kevlar of the belt, not to mention the car would have to grow some extra tread blocks to fill the expansion gap.

-Adam

 

I don't know what the dispute here is about. QuickSilver your car is modified, with super chargers and I am sure that you don't retain the stock rev limit. This guy is comparing your car to a stock car. I don't doubt you. BTW your car and garage is awesome. Have a nice day all

:seeya

 

QuickSilver97 There are some of us out here the don't realy care what the formulas say we just go WOT. Back to your first post yes it is a blast at the BonnevilleSaltflats. Was there and had an adrenilen high for three days after.
Not to start any thing but my HUD read 178 mph at 5800 rpm in 5th.
Ivan

01 Speedway White/Black
Coupe, 6 speed, HUD, Hurst Shifter
2002 Z06 Flywheel assembly,
K&N Air filter

Bonneville Aug 2001

:yesnod: :yesnod: :yesnod: :yesnod:



[Modified by iburke, 6:43 PM 4/6/2002]

 

Thanks for the support CJ and iburk! Thanks also for the compliments! Unfortunately though, the garage is the guys that I bought the Vette from. He wouldn't throw it in with the deal so I had to leave it behind. :cry

 

Interesting thread and discussion. Thanks for starting it (no sarcasm) QuickSilver! I like these learnin' sessions :) even if they do get a little bitchy...


[Modified by cgh1, 11:15 PM 4/6/2002]

 

You're welcome. I've learned quite a bit myself. :)

 

Oh, and at those speeds...if you've got time to look down, then you've got time to go a little faster :D

 

Question - when things deteriorate to this point, does anyone have the authority to terminate the thread?

 

I have the honor of Dynoing the lowest HP and Tqe. figures of any stock Z06 an 01'307/314 yet according to my speedo with my wife we broke 177-184 on many occasions.Who knows for sure? only the track and a radar or GPS setup can verify and then are these calibrated correct? David Smilovic PS
The track tells all.Dave (Val and I weighed in at 375 at that time)?????

 

Probably one of the moderators or Troy. I'm just amazed that a topic I started is lasting this long. :lol:

 

(Val and I weighed in at 375 at that time)?????[/QUOTE

Is this why you went with a LPE 427TT?? :lol: Sorry could not resist. :)

Bill :cheers:

 

Please make it stop! :crazy:

 

I agree with some of what you are saying "No Cure" but I have (and still do) shifted from 4th into 5th at 150 mph pretty close to Sea Level (San Jauquin Valley) and I can do it consistantly because my friends always want the ride so I do it evertime. I usually let off the gas by 160 because the road is too bumpy and my T1's are way too unforgiving. Also running bigger tires can effect your gear (or smaller for that matter) ratio and speedo. I am shifting into 5th redlined in 4th @ 6500 rpm, rev limiter set to 6700 rpm)

 

Get another guy from the forum from PA to go with you next time. Case closed.

 

Shinobi,
Looks like you're about right on there. According to the formula, 4th Gear @6500 RPM with a 3.42 rear and 335/30 R18 tires gives you 147 mph.

All,
I've seen a misconception posted here a few times that the more HP a car makes that the faster it can go in any given gear. That really is not the case. If you go 40 mph at 4700 RPM in first gear, and then add 1000 hp to the motor, the car will still only go 40 mph @ 4700 RPM in first gear. The way to change your speed@RPM is by chaning your gear ratios, tire size or rear differential. Now how quickly you can accelerate to 40 mph WILL be affected my more power. Note, an open converter on an automatic is an exception but only to a lesser degree.

-Adam


[Modified by Adam Bruce, 4:30 PM 4/8/2002]

 

I have had the rev limtied shut me down getting on the freeway in 3rd gear. I have to really shif fast to keep out of the rev limiter in 1st and 2nd. So far I have not hit the rev limiter in 4th so cannot comment on the top end.

 

how nice of you. and what do you "disagree" with?

your statements re you modded car's (non stock tire height, non stock rev limiter) capabilities adds nothing to the original discussion, namely, can a stock car do more than 141 mph in 4th gear, which it can not.

Untouchable00, davidmax, are you guys members of the flat earth society? :)