Hey guys,

I have 3:42 gears right now and from what I've heard you can only do like 180 with these and I've had it up to 174 without the HPP3 installed. Don't ask me how, I had a person run next to me with a 200mph gauge and thats what I got at 5500 in 5th. Would 3:23 or 3:15 be enough? Also with a 382 stroker and stage II heads and cam, will I be able to pull topend in sixth? Thanks for the help

 

Hmmm. makes me wonder how fast I was going with my old 380RWHP set-up when I ran it all the way up to rev-limiter, set at 6800RPM, in 5th gear! I can tell you this though; I was moving the steering wheel ever so slightly maybe 1-3 inches left-right and the car stayed bone-straight! I think I need to lower it! I would say you may need some 3.08s, or maybe even 2.73s, but I don't think you have enough power to turn that MPH with that high (low numerically)of a gear.

 

You can run WAAAAAAAAY over 200 MPH with the stock 3.42 gears....that is, IF you have enough power to pull 6th.

 

BTW, you'd be turning only 4478 RPM in 6th gear at 200 MPH with the stock gears.

And for any of you with plans to pull 6th gear to 6000 RPM...you'll need to have the power (and the *****) to run 268 MPH! Good luck! <img border="0" alt="[jester]" title="" src="graemlins/gr_jest.gif" />

 

Ok, so you wanna run 5th gear, not 6th? You can still run 200 MPH with the stock gears if you have the engine to pull out 6628 RPM. Of course, if the engine has the power to pull 200 MPH, it'll probably have no problem with 6628 RPM.

All information is assuming stock height tires.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 99MONGOOSE:
<strong> Hmmm. makes me wonder how fast I was going with my old 380RWHP set-up when I ran it all the way up to rev-limiter, set at 6800RPM, in 5th gear! I can tell you this though; I was moving the steering wheel ever so slightly maybe 1-3 inches left-right and the car stayed bone-straight! I think I need to lower it! I would say you may need some 3.08s, or maybe even 2.73s, but I don't think you have enough power to turn that MPH with that high (low numerically)of a gear. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What gears and what height tires?

 

If you really want to run 200mph, do yourself a favor and pull the outside rearview mirror assemblies, switch to skinny tires and lower the car.

You'll get more benefit from those than a considerable amount of horsepower. Wind resistance is enemy #1 at 200mph.

 

Stock 3.42 gears(10 bolt) and chrome AFS ZR1 17x9.5 w/275-40zr-17 and 17x11 w/315-35zr-17 tires.

 

Mongoose,

Your tires are too fat for a top speed run.

They look great and everything, and grab like mothers, but we aren't talking about traction here.

We're talking about wind resistance, and narrower tires are better.

If you want to take a gander, check out the East Coast Timing Association - they are a top speed club in NC (I think it's North Carolina...). Generally, they use "moonie" capped steel wheels with fairly tall, narrow tires.

Do a search on the internet for East Coast Timing Association.

 

I don't know about to fat, but they managed to get em up to rev-limited in 5th gear! I believe Vipers run 335s don't they, and they have a boat load of top-end. Oh hold on a sec.
Ferrari 575M maranello frt 255/40/18 rear 295/35/18 and top speed 202
Enzo Ferrari frt 45/40/19 rear 345/35/19 max speed 217
mclaren F1 frt 235/45/17 rear 315/45/17 max speed 240
Vector WX3 frt 245/40/17 rear 325/30/18 max speed 250
I know these cars Hp and gear and aerodynamics are much better but look at the tire sizes. they sure aren't skinny.

 

Seems like I read somewhere It takes 500hp to reach 200mph. I have also heard our f bodies don't handle right much over 160mph.

 

I wouldn't want to go 200 mph in my car personally. But if I did, I believe I'd go with skinnier tires on the front and would for sure lower it before attempting such a thing.

 

Look, I'm telling you how to go 200mph as easily as possible. Skinnier tires are better for a dedicated top speed car because they have less wind resistance.

I'm not making this up, it's an indisputable fact. Physics bows for no man.

Slapping skinnier tires on is less expensive than bolting in more horsepower.

 

Well, when I was at 174 I felt in control, the car didn't feel really light. But then again mine is lowered and I have the WS6 suspension so it felt pretty good at that speed. Next year I will get the full suspension Torque-arm, HAL shocks etc... so I shouldn't have a problem with the Stage II heads and cam reaching 200mph. Thanks guys for the info

 

why in the hell do you need to go 200mph anyway. what kind of racing are you doing NASCAR? i hope you at least have a roll cage in your care if your wanting to go that fast cuz if you were to wreck they'd be pickin you up with a shovel <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

I live in Pheonix and I live on base at Luke AFB
and if you go to Bell Rd and take a left to go behind the mountains there is a good 5 mile straight-away that I had plenty of time to reach 174 and keep it there for a good 2min. As we all know life begins at 160mph and I want to be in the 200 club with my car, I plan on getting a roll cage and full suspension so I won't have a problem being safe. I talk to friends that take thier bikes out there and do top-end runs all the time thats where I got the idea to do it. I also autocross, at Willow springs in California and I will be autocrossing here at Firebird International Raceway soon. To go 200 would be awesome. Thats just my opinion though, I'm sure there are plenty of people who would want to go 200mph.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Kansas 99z28:
<strong> if you were to wreck they'd be pickin you up with a shovel <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I actually think if you wrecked at that speed they would be picking you up with a wet vac <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

or a sponge and a bucket <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

 

<img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> <img border="0" alt="[rainbow]" title="" src="graemlins/gr_rainbow.gif" />

ok. i'm callin BS on this post. First off yer car is speed limited to 162mph unless you remove this limiter with tuning or a programmer. Secondly if you drove 174 mph for 2 minutes you'd cover almost 6 miles. You said the road was only 5 miles. This doesn't include the time it would take to get to 174, or more importantly, slow down. Cause if you did more than just barely touch the brakes, you'd smoke em in a heartbeat.

Next, I read a post once by a guy who took his camaro to these speeds. He was a long distance top speed challenge racer. His car was completely modded for wind resistance. Lowered, not skinnier tires, front air dams completely modified, front grill filled, headlights removed and replaced with aerodynamic carbon fiber forms, a wing for downforce, removed mirrors, plexiglas windshield (glass can crush in at these speeds), and not to mention 600 (or something like that) horses. He also had a fully built cage and race prepped frame.

Finally, The less frontal area you have, the less air there is (sq footage) to push around the car. Every little reduction in frontal area helps. One typical way is to lower your car at least 1". This cuts 1" of tire cutting into the air, on a car with 245 tires, you reduce frontal area 11 sq inches per side, 22 total (only 2 front tires count). Double that if the car is 2" lower. There are 144 sq inches in a sq foot. Another way to reduce frontal area is to have a smaller front spoiler, it decrease frontal area, but also decreases downforce on the front tires. Skinnier tires (narrower) also reduce frontal area noticeably. Removing your side mirrors (don't expect not to get pulled over and pass inspection) also decreases frontal area. Otherwise there aren't too many mods even worth mentioning that won't have you cutting parts off your car.

The lower the CD, the easier it is for air to pass around your car. A typical way to decrease the CD of a car is to "smooth" it out, or cut obstructions that air "catches" onto as it passes around your car. Removing the rear spoiler on a car will improve CD, but decrease rear wheel downforce. Removing rain guards (above windows), smoothing doors (removing door handles and locks!) ...etc. There really aren't too many areas to improve the CD of an f-body, but the one area that needs the most help is almost always ignored: the undercarriage. Look under an NSX, 911, or rear engine Ferrari and you see a smooth undercarriage-no exhaust pipes, driveshafts...etc. This is the reason why these cars have high top speeds with modest hp. The only way to improve aerodynamics of the undercarriage on a street car is to use "belly pans". Belly pans smooth air under the car, decreasing drag and improving top speed (usually). I have been seriously thinking about how to do this, one covering the front suspension up to the front crossmember, a rear one from the rear seat area to rearend, and another from the rearend (other side) to the rear bumper should work very well. If I can manage to keep ground clearance good, it might be commercially sellable

If you were to look at aerodynamic force, it quadruples for a doubling in vehicle speed. It is hard to explain, but is just a law of physics. Weight factor does stay the same merely doubling with a doubling of vehicle speed, and at higher speeds it becomes a smaller factor than wind (air) resistance.

 

I was guessing 5 miles, its probably more. I didn't go out and measure, I just know that I was racing the guy on the R1 Yamaha. I wanted to see how fast bikes were. We got to the beginning of the straight-away and then I did a second gear roll to top-end. He was about 5-6 seconds ahead of me when I reached top-end. Then I slowed to about 150 because he was slowing to get beside me and he slowed too much then we went again and he stayed beside me to see what I was doing. I don't know how I did 174 either with the limiter but thats what he read on the speedo. I don't have to lie. And it didn't take my car that long to reach top-end with all the hood mods I've done with my WS6 and all the additional mods I have in my Sig.