[Jess]

Group

After the next mod the 69 War Horse will be able to do 180 mph plus if I can keep it on the ground. Besides tires and rear sway bar what would be your suggestions to keep it on the ground. Remember it is a Coupe.

Jess

 

[Jess]

Ground Effects

Well lets start with 5500 rpm, 28 inch tall tires, 3.73 rear gears, final drive of .63, and a whole lot of horse power???

Jess

 

[Jess]

Ground Effects

The theoritical equation works out to about 178-180
http://www.corral.net/tech/gearcalc.html

However, to properly align expectations the car will never see that speed because of tire friction, wind drag, etc....top speed will be sub 140 IMO. Another thing to remember is the OD gear in trannys are rarely (if ever) designed to allow the car to acheive 5500 RPM while in them. The car's top theoricial speed is best calculated using the 1:1 tranny ratio since in a race you would not be using OD.

Here is a theoretical speed graph I made for my car so I could have an idea of speed based on RPM since the speedo hasn't been hooked up. If I stepped up to a 28 inch tire from a 25.5 I would have very similar numbers to yours. While no one has yet to pass the car 5000 in OD feels extremely unsafe because of lift and I know I am not going anywhere close to what the theory says I should be (I would guess sub 110). So to answer the core question at higher speeds and air damn/spoiler on the front will help you prevent lift (until a point) I see little benefits in side skirts.

http://www.dodgestang.com/speedchart.jpg

I beg to differ with you. According to Stan Weiss's website http://users.erols.com/srweiss/

5500 rpm
27.5 tire diameter
3.73 rear gears
.63 final drive

Gives you a top speed of 191.561. Check it out. I weigh less than the 06 retro and I drive the real retro brick that is going to pull the 05 and 06 shorts off when they want to dance at 70 and 80 mph on the freeway don't you think?

Jess

 

[Jess]

Ground Effects

Hey more power to you on it.

Out of curiosity what street tire are you running that is 27.5?

The closest I can find is a 255 50 17 at 27.1....so I upped the sidewall to 55 for calculation

That is the problem right now T/A Redials 255 x 60 x 15 on the rear. Good run around town tire. According to their book they are 27.5. They are rated at 90-100 top speed. Tires are a main issue. Brains are another issue. The 69 has an ocean for a wheel well after you flatten the seams.

Would have to do lots to the frame and roll cage the beast. The other problem that kills anyone in a fast Mustang, which was offered by someone else is lift. These cars aren't made for top speed driving. I've driven my 69 since 69 and I know how twitchie it gets on top end. I use to drive the War Horse back and forth West Coast to East Coast and back all the time when I was young and in the service. My last year in the Air Force went from Sacramento to Panama City Florida and back three times. On those long desert stretches air would build up under the car and it would float and I would have to back off, those old Dunlap GT Qualifiers saved me many a time when I was stuped.

Top speed driving is for Nascar boys. I just hate it when young kids who haven't seen life want to throw it away at 70/80 mph on the freeway and kill someone else along the way. They are as bad as the street racers and ricers.

It's just a dream to have the fastest and the badest. Projects like this is what keeps us gray beards afloat and our mad money spent. Build dreams to show not show off. No one will see your beauty if it is wrecked except the ghosts in the junkyard.

Jess

 

[Jess]

Effects fpr 180mph

Acooljt

It is a dream we all have, that is what makes us Americans, that is what makes us great, to be the fastest and the baddest. We all have it. That is why we are here. It is fun to build and waste my mad money. It is a stress reliever of the job like my wife. It is a well that I throw money down. It is fun to take it to car shows and see the questions in their eyes before they ask. Individuals are right, there is no place to drive it in the land of the big BX/PX, but it sure as hell is fun to know you have it.

Jess

 

[Jess]

Effects fpr 180mph

acooljt

I am looking now for a cage, something clean and not obnouxes. Can't find a decent looking rear spoiler. This will always be a daily driver even though it only get 6-7 mpg as it is set up. It is the first new car I ever owned and I will pass it on to one of my son in laws(depending upon if they deserve it) or my long serving mechanic/friend/dreamer/adviser/chevy freak.

Jess