Autocross

BAD67FUN · Aug 2, 2004

So who's autocrossed there old car?? I'm planning to run this weekend for the first time with the 67'. I remember my 87' being very twitchy.

Any tips on what the old iron will tend to do?

pyroman · Aug 2, 2004

Sweet man, I've wanted to do an autocross or road race. I'm planning on maybe doing a road rally with my brother in a few years. As far as advice goes I'm inexperienced in the ways a 67 would respond to an autocross event, but good luck.

65 fastback · Aug 2, 2004

BADFUN,

You're going to have a blast and it's one of the best ways to sorting out your suspension. After the event post how your car reacted (ie: the front plowing as you entered corners or the rear getting loose).

As for tips, your best on site suspension tuning will be with your tire air pressure. I would start with faily hard tires - 2 to 4 psi above max pressure in the front and even pressure in the rear. You can tune the air pressure by using some white shoe polish on the tire's side walls.

Good luck and have fun.

Tim

66P51GT · Aug 2, 2004

Agree with the tire pressure recommendation. Also do a search at Corner Carvers Forums for other handy driving tips.

* Walk the course and get a gameplan.
* Try to memorize the course it in your head.
* Try and take late a apex in corners or you will end up wide.
* Once you are in 2nd gear, keep it in 2nd.
* Have fun and drink lots of water.

BAD67FUN · Aug 2, 2004

Maybe I should clarify. I've autocrossed before. Not alot... but I've got around 60 runs. Just none on my 67'. I was wondering if the car had any tendencies. No big deal I guess as that every car has a personality. I just thought I'd bring the subject up.

Hack · Aug 2, 2004

BAD67FUN said:
Maybe I should clarify. I've autocrossed before. Not alot... but I've got around 60 runs. Just none on my 67'. I was wondering if the car had any tendencies. No big deal I guess as that every car has a personality. I just thought I'd bring the subject up.

If you post all the specs of the car, someone may have a car that's similar enough that they feel they can give information. IIRC, you have a big block? Suspension stock? Tire size?

HistoricMustang · Aug 2, 2004

Under construction but it may help a bit on the high performance stuff.

No pop-ups and no commercials.

Where else can you get free info from a ride that was the top ranking early model in the country in 2003 at NASA.

www.historicmustang.com/tech.html .

HistoricMustang
www.historicmustang.com

bnickel · Aug 2, 2004

bad67, if you're suspension is basically stock, the car would have a tendency to understeer, but since you have the baer brakes and bigger wheels and stickier tires it may feel fairly balanced but still on the side of understeer, you could always try a little throttle induced oversteer though. do you have a rear swaybar on the car? what size on the front? any other suspension mods? did you ever end getting a power booster for the brakes or are they still manual? give us a little more info and we can help you a bit more. also you might try PM'ing or emailing bullitt (username) he has a 67 fastback that he autocrosses pretty regularly, but i haven't seen him on the boards in a while so he may be anging out elsewhere these days, good luck and keep us posted. most of all have lots of fun

mustangracer · Aug 2, 2004

I've autocrossed my 65 a few times, and I'd actually recommend against the max tire pressure.

I twiddled around with the tire pressure and the higher pressures seemed to lead to less traction (more sliding, less turning). I ran BFG comp T/a Z's at 28F/26R. (probably due to the stiff sidewalls).

As far as comparisons to other cars, I ran similar times to the late model mustangs that ran with us, which put me right about the average for the various courses, but only the modified and cobra mustang actually beat my times. The leaders typically ran 3-6 sec faster than me.

Biggest slowdown for me was tight 180 corners, our stock steering just wasn't designed for quick lock to lock driving.

BAD67FUN · Aug 3, 2004

Well.... I've got the subframes. The tower brace kit. 5leaf reverse eye rear springs. 620 front coils. New upper control arms. No rear sway bar. 1-1/8 front sway bar. 235-45 up front... 275-40 in back for rubber. Shocks... no clue.

bnickel · Aug 3, 2004

it should do weel on the autocross with all the mods, i'd have to say that it will probably still have a tendency to push a bit on entry and then get a little loose at the apex, but with the 275/40's in the rear it might not get too loose. with the baer brakes you should be able to brake pretty deep too, just don't overbrake or you're likely to get a little too loose in the back end good luck and be safe out there. keep us posted on how she does

BAD67FUN · Aug 9, 2004

Sweet. That about sums it up.

Oh wait... you want more detail? Okay, fine...

Yes, it was a blast. I was nervous before the first run because I wasn't sure how the car would react. And with all the things that I've wrenched on the car it made me wonder how good of a job I did.

So the first run was more controlled. And I got better times as the day went. The car basically tended to push. But not to the point where I couldn't compensate. If I knew where it was going to push I could change my line. The course had one real wide right hander that after you got into it you basically powerered thru sixty percent of it with the arse end hanging out. That was really cool.

The C4 I have is so gone I can't express it any more than that. I just hated it. I was caught out of my power band way too much. The five speed is a must have. Hopefully in spring.

That's about it, later.

bnickel · Aug 9, 2004

cool jason, i'm glad you had fun. i can't wait to do it myself one of these days

Bullitt · Aug 9, 2004

looks like i caught this one a little late! if you ever need any autocross tips (driving or car setup), let me know. I've run 15-20 events in my 67 Mustang and have countless autocross runs in just about everything else, so I can probably help a bit

glad to hear you had a great time. believe it or not, a classic mustang if setup right and driven well can be VERY competitive. i used to dominate our street tire class until i moved onto driving A&M's Formula SAE car (500 lbs, 75 HP, hehe).

I'm getting back into it again this fall. Probably going to be running Nitto DRs on all 4 corners (like a cheap R compound, but last a little longer) and I'm stiffening the car with a set of Maier racing 700lb springs in the front and matching rear leafs. Should be a good time!

BAD67FUN · Aug 9, 2004

Yeah, I'm already putting together my wish list. The manual tranny is at the top. But I'm just plain broke right now. I'd like to get a nice set of shocks too. I have no clue what's in there right now. A set of Koni's would be a great Xmas present. Those two items alone, on top of what I already have, would make a world of difference.

I'll live with the street tires. I just can't justify a set of wheels and sticky's devoted to racing. No cash.

I'm sure the most bang for the buck would just be to learn this car. The only car I ever ran before was my 87' Notch a few years ago. Totally different car.

Bullitt said:
looks like i caught this one a little late! if you ever need any autocross tips (driving or car setup), let me know. I've run 15-20 events in my 67 Mustang and have countless autocross runs in just about everything else, so I can probably help a bit

glad to hear you had a great time. believe it or not, a classic mustang if setup right and driven well can be VERY competitive. i used to dominate our street tire class until i moved onto driving A&M's Formula SAE car (500 lbs, 75 HP, hehe).

I'm getting back into it again this fall. Probably going to be running Nitto DRs on all 4 corners (like a cheap R compound, but last a little longer) and I'm stiffening the car with a set of Maier racing 700lb springs in the front and matching rear leafs. Should be a good time!

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