How good is the stock spoiler?

[lemosley1973]

@Hoytster what do you suppose those cars would reach down the front straight at Road America or COTA?

 

[Hoytster]

If I has to guess, around 170-180 at Road America and 160-165 at COTA. You can carry more speed out of the corner at RA then you can at COTA. IIRC, RA's main straight is around 4400 feet while COTA is just under 4000. F1 just hits 200MPH at COTA on the straight.

 

[NerdKrusher]

Mustang aerodynamics are pretty bad - a convertible will be even worse. 200mph on a road race course (which one) would require a ton of power and a lot of work aerodynamically - I'm curious what kind of build you are looking at to be able to do this + be suitable for drag racing.

For that much speed, you're going to need something more than the stock spoiler, which probably would rip off at those speeds anyway!

Couldn't tell ya which road race. Im learning more about those events.

As for my build. I'll be doing coilovers, with all the proper suspension and chassis upgrades. I.e. subframe connectors,, roll cage, control arms, ECT. The engine at first I will be running a 2.8 LC kenne bell. I found a Forged rotating assembly form modmax.

Might convert to turbo setup in the future.

As I mentioned. Drag racing would be secondary. I'm mainly looking to build my car for road course's.

 

[NerdKrusher]

Very good group. I'm a member of that one and those guys there are extremely knowledgeable. I miss my AutoXing days.

I'll check it out thanks

 

[NerdKrusher]

As a person that has done a fair amount of HPDE and road racing events with a 95 Cobra.....

The stock spoiler on an SN95 has been measured to delivery ~40 lbs of down force over 100MPH. In other words, it's almost useless and is for looks. Most people add a Gurney flap to the original wing to add additional down force, install a NASCAR style spoiler, or add a full wing to get over 100lbs of downforce on the rear.

I would reduce you're expectation of hitting 200MPH on a road course unless your planning on going down the Mulsanne straight with the chicanes removed and have some serious money into your car. The fastest car I drove at Summit main was a 800+ HP AIX car that was fully setup with aero bits out the ass and a proper suspension, and I think I might have hit 160 down the straight. That car probably cost over 100K to build. You will have to do some serious aerowork on an SN95 to keep it planted above 150. The front end starts to get pretty light around 130-140 even after being lowered and all the normal stuff done. You run into all sorts of durability and cooling issues on a road course when you start making enough steam to even try and hit 200. And then you have to scrub all that speed off before you enter the corner, otherwise you kill yourself.

You can setup a car to do both drag and road racing, but it won't be the best at either. It can be somewhat good at both, but not the best. You're probably going to want to look at a full torque arm with panhard/watts link setup as a base, and then have to swap springs, shocks, and tires out when going between events. You're better off setting it up for one or the other, or have two cars like I'm doing. A car setup for drag is downright scary on a road course.

Just for some perspective. This is a video of Brian Faessler, son of the owner of Paul's Automotive Engineering. He's one of my favorite AIX/unlimited class racers I like to watch as he's a great driver and has some serious money into his car. He says he's making 750-800 HP here and has the car built to support it. I wouldn't want to guess how much money it took to get here.

Thank you so much. I've been waiting for some kind of numbers for that spoiler. If you have experience in road racing I'll definitely take your advice into consideration

 

[lemosley1973]

If I has to guess, around 170-180 at Road America and 160-165 at COTA. You can carry more speed out of the corner at RA then you can at COTA. IIRC, RA's main straight is around 4400 feet while COTA is just under 4000. F1 just hits 200MPH at COTA on the straight.

That's about what I was thinking. I knew F1 could hit 200 at COTA, but wasn't sure of those cars.

A car capable of 200MPH is big money. Think it can turn a medium fortune into quite a small one

 

[Deleted member 38176]

There is so much stupid in this thread. Wow.