not to be rude Gordon but people do hit 200mph in the texas mile and I would certainly call it a competition wether its breaking a personal record or the current track records

Bull crap. Measuring speed is NOT the way to determine what your gear ratio is. Too many variables, tire rolling diameter changes with rotaion speed, temp, tire pressure, slip etc. Mazda sells 3 5th gear ratios nough said.

Well if it's so *** important then stop dropping all the important parameters. If you want to go 200 mph and are trying to figure out required Hp then you better figure in rolling resistance, air drag, additional drag to add down force, tire slip, etc.

The gearing will easily do it, you can tell that by driving 50 in 5th and multiply the rpm read by 4, its still below redline; big deal.

a basic estimate of power 0.36 x 19.26 x (speed)**3 x 1.05 x 1.06 /146600 +150Hp

.3 x 19.26 = Cd x cross section area stock but with a 10 deg wing angle and splitter to get some down force Cd more like .36
1.05 trans losses
1.06 diff losses
tire 150Hp rolling losses ( estimate at 200 mph)

need ~575 Hp

Now go run the texs mile .. oh sorry you need more Hp to be able to accelerate to 2000 within the mile.

So go run the west texas open road race you have 60 miles - rock cliffs in turn to get up to speed. By the way, in the unlimited spped catagory most of the super cars entered, dnf before completing the 120 total run and it typically takes a NASCAR road race car to get an average above 200. at what 750 plus Hp.

im confused why 575-600 is needed to make it to 200 when other cars with much more weight hit it sooner like the c6 vette

Shining examples of humanity.

torque

Quick - tell me what your boost gauge reads in a vacuum environment.

Oh, that's right. Your engine won't even start.....

Exactly.

You will need over 600RWHP to hit 200 in the mile. I was just short of 600 RWHP and ran 196mph at Texas Mile. I now have a tubo on my setup and plan to run the next Texas mile event with over 800RWHP.

was the 600whp done on a dynojet or a dynodynamics roller?

Yep (200/187)**3=22% power increase >> 580+Hp.

Was yours the Silver Fd at the fall Texas Mile event? I look forward to seeing the new setup :)

Yes, Saturday and Sunday

I hope that more RX7's make it next time

Less weight will help you get there sooner but ultimately weight isn't a factor in top speed if you have a long enough straight. Its purely a function of horsepower and drag. A C6 would also need around 600hp to hit 200 (maybe slightly more since its a slightly larger car).

That was an impressive run :icon_tup:
I wouldn't dare take my car to the Mile, I would just embarrass myself with my stock twins :lol:

Julian why is it that if i misunderstand something or disagree with you, you get aggressive ? I told Gordon I disagreed with him(because of a misunderstanding) and he didnt act like a jackass. so whats the deal?

Two years later! sorry, must have been that time of the month :blush:

Put the rear up on jacks and rip it. No load on the tires so should be pretty smooth.

And watch the jack stands give out or tip. hope you werent aiming at a house

Its already been established that you'll need to make at least 600rwhp to hit 200mph in one mile.

And if you want to hit 205+mph you'll need to rev it out quite a bit.

I hope your 20B is properly balanced and built to handle those high rpms

I'd be weary over 200mph. Every time I think of "top speed" and "rx7" this video comes to mind: http://www.youtube.com/watch?v=o8b8oYuftYk

Skip to 2:00. Old thread I know, but without this video thread is incomplete :lol:

Reason for that was because of the wing being to small. saw that documentary about the guy saying there was a restriction or something for how big the rear wings were suppose to be, which after that accident they allowed bigger ones.

The car surpassed 200 by a large margin. Actually it lost control at 230MPH first due to the added power of the H20. As he started to spin, air got under the car and he started to fly.

Quite impressive IMO

http://www.youtube.com/watch?v=Kq-C9...layer_embedded

I don't know what the actual top speed is on a stock FD, but I have hit 150 with ease, and I have a stock car (stock tire size, too.)

It seemed to have plenty more to go, but it didn't feel safe to go any faster without modifications.

^^ If your car is 100% stock (not even a DP) you have about 5 mph more maybe 10. That number comes from stock specs and personal experience.

Back in the day (1998) I was on the rosarito-tijuana rd (Mexico) and decided to test out my 100% stock FD top speed. Man After 150 it climbed very slow, and it just didn't have any umph after that. So slow that I actually had time to think about "things" and I got off the gas... I don't remember where exactly I shut down but I could tell there wasn't much there and I was gonna run out of straight road real soon as things go by real quick at 150.

If you open that baby up that top speed threshold expands real quick. It's kinda scary because as a driver you don't realize exactly how fast that is. These days I can hit 150+ at a drop of a hat, it comes up so quick that it doesn't seem like a big deal. But it is.

Your right ^ . Doesn't seem fast until something goes wrong, then the "oh shit" factor kicks in