top speed?

Topic: top speed? (Read 7906 times) previous topic - next topic

Reply #30 – August 22, 2007, 04:29:03 PM

I am doing some aero changes to the car. like I said, Im not sure the car will do it, but Im gona try. Id like to know more about your project, if you dont mind. Im working my way up to bonneville, but want to get some experiance under my belt closer to home. I know there was a merc, that broke 200, but what is the fastest TC? That would be a record worth shooting for. Hillbilly Deluxe, I'd be real interested in seeing the info you have. as Ricky Bobby said, "I wanna go fast!"

top speed?

Reply #31 – August 22, 2007, 06:22:51 PM

Quote from: kitzdnm;171173

You better tape all the cracks on the doors.

I remember somebody posting in another thread about that.
I guess that, at a certain speed, the tops of the doors begin to pull away from the roof.

top speed?

Reply #32 – August 22, 2007, 06:45:58 PM

Quote from: cougarcragar;171204

I remember somebody posting in another thread about that.
I guess that, at a certain speed, the tops of the doors begin to pull away from the roof.

not the real reson, surprizingly at high speed you can loose top mph due to the wind resistance from the gaps in the body, headlamps, and door jams. so you put tape over the holes, and gaps to make the car more slick. every little bit counts when your going for top mph!

top speed?

Reply #33 – August 22, 2007, 10:37:28 PM

I remember about a year and a half ago I told everyone I did about 135 and every one said there's no way a 5.0 so could pretend go that fast....

It will accelorate in overdrive, up and down hills.....

top speed?

Reply #34 – August 22, 2007, 10:45:24 PM

I've had the 84 up to 130 back with the C3 and 3.45 gears. The car used to rip back then...until the PCM went out...hasn't run right since.

My 87 topped out at 123 mph going downhill in D...OD was burnt out so even if it would have shifted it wouldn't go any faster.

Fastest I've gone was in my GTP...13- something...it was faster than 130 but the speedo only goes to 115 and I didn't trust myself to focus on the HUD haha.

I have two speed goals....1st is to go 200+ mph. (I see a trend)
2nd is to go 200+ in the orange beast out west in one of those races... I'll probably hit #1 in a Factory 5 Shelby Coupe. But just maybe I'll take care of both in one shot.

top speed?

Reply #35 – August 22, 2007, 10:45:48 PM

I can't speak of Texas as I have never looked at their rule book but I am sure its modeled after Maxton's (ECTA) and Bonnevile's (SCTA), but you have to be careful what you tape up. In street legal classes just ask the simple question. Is this legal on the street? If yes then you shouldn't have a problem. Yes tapping body seams can help some. Also think about it would you want your driver's door tape shut? Greatest aero gains can be had by reducing frontal area and trying to prevent as much air as possible from getting under the car.
Frontal area is sometimes misunderstood as it involves the whole car. Imagine the car passing through a verticle plain. As the car passess thru front to back how much of the verticle plain would be cut to allow car to pass thru. Air doesn't like drastic changes in direction and acts as drag. Air also doesn't like to combine with air from other directions, example of air spilling off the top and air coming up the sides, rear roof pillars are a major area. Next is how is the air coming of the deck lid and up from under the bumper? If there is any turbulence behind the bumper it's drag.

One of the biggest hurdles to overcome with running a street legal vehicle over 150 MPH is the safety equipment required. Having to go from a normal 4 point roll bar to a full cage, the necessary fire systems. If you haven't already get your hands on a rule book. SCTA does not actually run a street legal class like Texas or Maxton. I think in all 3 sanctions if you are running out of class in Time Only you are limited to 150 mph.

I know I have been long winded, but I have been around LSR for years now. I am just coming back to it after taking a couple years off having lost a close friend at Bonneville.

If you haven't already please check the out:
Landracing.com
Sign up for their message board and email list. Lot of great knowledge and old time expierence there.
For technical information on aero and HP required I suggest:
Dr. Mayfield's buttstuffyses
Dr. Larry Mayfield is a true rocket scientist retired from Nasa and very good at aero buttstuffyses as well as other data. Also own what will be the worlds fastest Sunbeam Ford 5.0 turbo powered

PM an email addy and I can send you a link to Car test software that will get you started in evaluating a combo that will get you to the speed in a mile.

If you have ever read any of the LSR articles in Hot Rod magazine you might have seen this car. It is the one that got me hooked on LSR. I use to crew on this car at Maxton til I decided to back away and re-evaluate life. Losing a close friend sometimes makes you think twcie. Nope that not me in the pic that was this year from Speedweek at Bonneville.

top speed?

Reply #36 – August 22, 2007, 10:53:48 PM

Not trying to burst anyones bubble here, but any speed claims based off factory speedometers are weak. I have seen and tested factory speedometers and most once they reach about 80-90 mph start to loose accuracy. I have seen as much as 20 mph off on 140 mph speedometers. Until speed is actually timed through a measured distance ie. normal distance used is 132 feet then its not accurate. We even tried GPS a few times but the average consumer GPS has a slow update rate and may actually miss peak speed. Not doubting that anyone isn't fast it just maybe not be as fast as you think it is.

top speed?

Reply #37 – August 22, 2007, 11:14:25 PM

Quote from: Hillbilly Deluxe;171297

Not trying to burst anyones bubble here, but any speed claims based off factory speedometers are weak. I have seen and tested factory speedometers and most once they reach about 80-90 mph start to loose accuracy. I have seen as much as 20 mph off on 140 mph speedometers. Until speed is actually timed through a measured distance ie. normal distance used is 132 feet then its not accurate. We even tried GPS a few times but the average consumer GPS has a slow update rate and may actually miss peak speed. Not doubting that anyone isn't fast it just maybe not be as fast as you think it is.

Amen...

Everyone thinks they are fast... Till they find out what fast really is...

top speed?

Reply #38 – August 23, 2007, 01:08:30 AM

I was going pretty good... about 6 minutes in 13 miles, which included about 3 miles of residential(speed limit) driving.... That is when I made my origonal 120mph claim...

top speed?

Reply #39 – August 23, 2007, 01:29:25 AM

160 Km/h at a 3 mile straight at the level of the sea in my cougar carbed 3.8....With me and other 4 guys...

It`s not fast, but i did not have FRONT BRAKES at the time
(with NO front brakes i refer with no calipers)

Don`t ask me my i did it. I`m not proud of doing that. From then i don`t run faster than 65 MPH in the highway.

Even the F-150 V6 of dad can do that speed safely in not so many seconds.

top speed?

Reply #40 – August 23, 2007, 01:40:34 AM

I'm not proud either, but I do like to say I told ya so. I don't speed too much anymore. Never more then 10mph over the speed limit. I was a dumb kid with a v-8 that likes to go fast. I have alot more to live for now.

Most of the reason why I stopped speeding, is cause I had a cop follow me to my house one day...

I was driving the same route in my old 86, the gray one not the black if anyone even remembers any pics of my cars... That car I never did the digi mod to, so it stayed at 85. The cop told me that he was going 110mph for more then 5 miles and barely caught up with me. He said he had no idea how fast I was really going, but lectured me quite abit about how un-safe it was.

Then he asked me to pop to hood and show him how many hop up parts I had. He was severily disapointed when I told him it was a bone stock 5.0 s.o like the early 90's crown vics...

top speed?

Reply #41 – August 23, 2007, 05:15:37 AM

I think the fastest Tbird TC was bill Elliot’s at Daytona in 1987 he did 212.xxx MPH.:hick:

top speed?

Reply #42 – August 23, 2007, 05:18:02 AM

Cant believe it took till page 5 post 42 for someone to say it.

top speed?

Reply #43 – August 23, 2007, 07:36:17 AM

Don't forget, that was the speed according to time (average speed), so the top speed was higher. Plus it wasn't a real Tbird. :hick:

top speed?

Reply #44 – August 23, 2007, 09:06:52 AM

Quote from: Billyf17;171359

Don't forget, that was the speed according to time (average speed), so the top speed was higher. Plus it wasn't a real Tbird. :hick:

...and it wasn't a TC :hick: