RX7Janoy

I am thinking of building my Rx7 into a mile car. I am trying to break the 200mph mark in 1 mile.

So

#1. Do you think it can be done?

#2 How much power would it take?

#3 What kind of suspension upgrades would need to be done?

MakoRacing

iTrader: (12)

Of course it can be done, its a question of how much money/time/commitment you have for such a project...

Supernaut

iTrader: (83)

You can get a km/h speedometer. That will make you think you are going 200.

I would start off by looking at the texas mile site...

http://www.texasmile.net/200club.php

I know we have at least 1 member up there.

Search the forums for texas mile or 200 or whatever...
https://www.rx7club.com/20b-forum-95/fd-tranny-tremec-t56-787318/
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/epic-quest-hit-200-mph-bonneville-810225/

Get the names of people that did it and take a look at their mod list.

RX7Janoy

Thanks Guys!

w.sen

iTrader: (8)

that would be one gansta 7

RX7Janoy

I'm going to go for it. Right now my 7 should be putting like 400 to the wheels so I'm going to see how far I get with that much power to gauge what its going to take.

nillahcaz

iTrader: (2)

Is you're goal just to hit 200mph with in one mile? or are you looking for some kind of sanctioned thing?

Gears are as important as HP. If this is the soul thing the car will be doing you want to run out of gear after .99 mile. you also want a close ratio tranny, something like the TKO 600 with a ford 8.8 solid or IRS with 3.55 gears will get you to 200 at 8k rpm so if you don't care if you get to 200 before a mile this would be the way to go unless you then wanna go faster.

Aero is HUGE not just to help the care get there but to keep it on the ground, Jim Mederer will attest to this. You will not only want a real, functional wing, but also a lot of work in the front of the car. The racing beat car flipped due to loss of traction sending it sideways but do not discount front end lift. Also remember that down force added behind the rear axle will apply some lift to the front. Under the car should be as smooth as you can get it.
Use the front end to ram air into the turbo, and don't forget that all the air going into the engine bay needs to leave some how, Try not to make it leave under the car.

TeamRX8

iTrader: (2)

$100,000.00

everything else is easy after that

http://www.racingbeat.com/resultset....tNumber=Engine


.

nillahcaz

iTrader: (2)

over kill.
I think if racing beat can run 244mph standing mile on a twin turbo 13b with 530hp at 14.5 psi boost there is no need for a 1000hp 21psi boost 20b.

and don't start on the but that was a standing mile and he wants to do bla bla bla . Its a LOT harder to get a car too and keep it going 238 mph for a mile than to get to 200 from a stop in a mile. As i said, gearing and aero are the two big parts. dumping as many lbs as you can will help too.


edit: note this is just to get you there, safety still needs to be added in, cage, suspension, tires, etc

RX7Janoy

So this is the RX-7 that we will attempt to go 2000+MPH in the mile. It is the first Matte white RX-7 3rd Gen... Well the first I have heard of.

So at 530 they pulled 244 in the standing mile. Thats not that far away from where I'm at. What kind of wing do you recommend. I know on the CCR they dont run a wing but they run a front splitter. Also thats a space ship and all the lines on the car are designed to be able to run no wing. I guess what I'm saying is that if I run too big of a wing it will cause too much drag and down force causing the front to come up. So maybe a little wing. I was thinking the pic #1.

What do you think.



1.

2.

3.

nillahcaz

iTrader: (2)

adjustable, every thing should be adjustable from spoiler, coil overs etc.
like this


you more or less want the same low drag and high stability that a land speed car has. To give you and idea this is the fastest 7 in the world.
Link
the low stace, clean lines, the stabilizers on the roof, the whaletail spoiler. You will not need all this but take what you can.

Starfox07

I don't think racing beat did 244mph in one mile, the 1500+hp Supras are just now doing that. I think racing beat did 244 on the salt flats (like 3 miles) 200mph in one mile is probably going to require around 650whp in an RX7 judging from other cars that compete. That is a very low estimate, because, for instance, there have been 800+hp Cobras just barely break 200 at the Texas mile.

nillahcaz

iTrader: (2)

Post #9 "and don't start on the but that was a standing mile and he wants to do bla bla bla . Its a LOT harder to get a car too and keep it going 238 mph for a mile than to get to 200 from a stop in a mile"

Starfox07

I have no idea what you are saying, but read this:

http://www.racingbeat.com/Gallery/95Bonneville.htm

They recorded 244mph with 760hp over 3+ miles. Good luck doing 200mph in a standing mile with only 500hp, because there is no way in hell its going to happen. The Bugatti Veyron, with 1000hp, does 210mph in a mile. This is with a stellar launch control system, perfected aerodynamics and perfectly matched gear ratios.

RedX7FD

iTrader: (7)

No Guys, I saw a show where Racing Beat did the 244mph or so at Salt, but it was modified with over 900HP and BTW aero will be very important beacuse Racing Beat's RX-7 flipped at about 230mph while attempting this the first time because of the wing support.

nillahcaz

iTrader: (2)

Starfox-200mph is not hard to reach.
Two times the power will not give you two times the speed.
The car that did 242 was a 13g 14psi boost and had 760hp with a 2:1 custom rear, and the car was built for 300mph but did not have mother nature on there side.
In a 450ish hp 7 on a 2 mile stretch i got to 185 before i let off. good aero, 4.30 gears.

I think it is so funny how every one thinks 200 is so hard to get to when i spent a month in jail for doing 140 clocked by a helicopter in a 145hp NA 2nd gen.

Starfox07

Aerodynamic drag is an exponential function. 140 is not hard. 200 is VERY hard, especially in one mile. IIRC a guy was attempting a 200mph run in a blower swapped 750whp Ford GT and only managed 195 or so at the Texas mile.

onefast93RX7

iTrader: (5)

anyone going to the Texas Mile this weekend?

nillahcaz

iTrader: (2)

Hard is relative. I can build an NA for under 15k that will do this and more, I see this as easy you do not... what ever. Its only hard if you don't look at the car as a system but as a set of systems.

RX7Janoy

So how much power will it take?

To me that is the most important right now so I don't end up building a motor twice.

There is another event in Miami coming soon so I will try my first run at 286 whp. I'm thinking it will be over the 150 mark.

I will post the run when it happens.

Starfox07

This should be helpful:

http://www.youtube.com/watch?v=-C5gsNxe87U

I'm going to estimate that's between 450-530whp from the LSX. And it did damn near 200mph, so you may be able to do it with 500-550whp from the 13b.

nillahcaz

iTrader: (2)

good post starfox.

"We gained 2mph by taking the mirrors off, and gained 1mph by covering all the seams with blue tape. Aero is very important in this event."

:P is that not what i have been saying?

Edit... also note that he is damn near the end of 5th... its geared well.

RX7Janoy

So I bought her... My 200 MPH RX-7 Project... Will post pics soon!

CiscoKidRX7

If your doing 400+ already I figure you go to racing fuel and a good tune for it and you should be looking at 80+ ponnies and getting pretty damn near that. Not to mention the other benefits of going to race fuel(more forgiving).

ronbros3

going 175 may be easy,, going 200+ gonna take at least 550hp, maybe more.

i saw 2 rx7s, 13b, blow the engines right outta car, it all happens in the last 1000ft,at 20+ full boost , and hold it at full boost no let up, for the last part. of the mile.

you think thats easy,try it. dont forget its 5280ft, at close to full output, engine heat build up is incredeble, and detonation can be instantanious.

look close at water injection !

so far NO rotary has done 200 at the standing mile.

a big difference than Bonneville, with 3-5 miles to work up to 200+ in a FLYING mile.