The Perpetual "What Gearing Do I Run at This Track?" Thread

[stonebridge20]

Thanks Champ !

[Scott Hanba]

Finally getting my FF together. Hoping to do the MSR Houston Dbl reg in January. Looking for suggestions on gear ratios, or min & max speeds for MSR Houston to get me in the ballpark. I have a 10:31 R&P, please supply R&P with your ratios.

Thanks.

[Don Jones]

Need gearing for Roebling Road . 10-31 R&P
Thanks.
Happy New Year!

[teamwisconsin]

Anyone got Buttonwillow gearing, 25 clockwise configuration? 10:31 or other, I can do the math...
-Ethan

[Garey Guzman]

It's been a while since I ran BRP (and I'd like to think that I'm a little better than the last time) but here's what I used the last time out (DB6, 10/31, Hoosiers):
17/35, 20/32, 22/30, 24/28

[Garey Guzman]

Post #46 had some info - I hope you ween't trying to get this info for last weekend!

savannah >>>here's something 20/32 21/30 24/28 25/25

here's something else...run a taller first than above, just a tooth or two under the second ratio...use it as an alternative second if you're slowed a little by traffic in turns 5-6 ..also get a one tooth under fourth - if the wind is coming strong from the west, run it

Personally, I've tried both gearing so I only used 2-4 in the race and for using 1-4 during the race. My fastest laps were using 2-4 but it was also my second time at the track and I had THE driver coach helping me (James Lee).

[PaulT]

Back in Feb 07, This was posted

This is in the baseline gearing file for a 10:31
Texas World Speedway (2.9 config.) 18/33, 20/30, 23/29, 24/26

http://www.apexspeed.com/resources/baseline_gearing.htm

Curt

Does someone know the tire size associated with the gearing in this chart?

PaulT

[Scotty Segers]

Those are the correct gears for TWS 2.9 or 1.8 counter clockwise using standard Goodyear FF tires.

[PaulT]

Since I have a vintage Lotus that uses Dunlops, I have no idea how big a standard Goodyear Tire is? Can someone help me move past the last oil crunch (70s)?

Thanks
Paul

[Garey Guzman]

The GY rear tire is listed at 22.5 diameter (Hoosier says the same thing).

My measurements for the rear GY tire has been between 22.2 and 22.75, which makes 22.5 a reasonable number to use for your conversion.

What's the diameter (or circumfrance, which is what I measure) of the Dunlops? I seem to think thay were a little taller or was that just the fronts?

[T644HU05]

I looked, but didn't see anything. Looking for advice on Fontana, with a weak gerbil powering a brick with wheels using a 9:31 spinning American Racers. I have two and a half months to prepare!

Thanks,
KC

[PaulT]

Vintage Dunlops are supposed to be 23" OD. So a little taller (~2%)

Paul

[old dog]

Anybody care to share Road America gear suggestions? 9/31 or 10/31 doesn't matter.

[Garey Guzman]

From Jake Lamont's book, a great source of info for every FF'er:
18/34 20/30 23/29 25/27 with 10/31

[Ed Erlandson]

Can someone give me an idea of gears for Topeka?
Either 9/31 or 10/31 using goodyear tires
thanks

[Ed Erlandson]

this will be a starting point which should not over rev your motor
it is for 9/31 and the goodyear 22.5 inch tires
25/25
21/24
22/29
20/30

it is very hot and dry by june, and the lap times are quite a bit slower than during the winter.

[R.DeVoe]

Gearing for a 10:31 R&P please, thanks.

[EACIII]

In Jake's book it is listed as: 17:33, 19:31, 21:30, 23:29 for a 10:31 with a note "Courtesy of Peter Symonds". I haven't been to NHIS in years but am going to run something close to the above next weekend. We'll see how it works out.

Ed

[todcp]

Anyone want to take a guess at a starting point for gears for Lightning?? CFF

Guess I will bring all my gears and make decisions at the track.

Tod

[EACIII]

From the slow lap I did around it in a street car I would guess something close to Watkins Glenn short course gearing as a place to start.


Ed

[PRS56]

Hi Eddie:
I viewed the slide show of the track that is posted elsewhere on the site. It looked like it had a lot of flow with no 1st or 2nd gear corners. Is that fairly accurate?
Regards,

Greg Kokolus
NCF #56

[EACIII]

Yep, I think it will be a fairly fast track. The slowest corner seem to be the left hander after the bridge. Somewhere on Youtube there is a video of a lap of the track taken from the back seat of my car. The link is somewhere here in apexspeed but not sure I could find it.

Ed

[PaulT]

Anyone have any gearing for the South Autobahn track? Please include final ratio and rear tire diameter if possible.

Thanks,
Paul T

[Terry M]

Looking for a starting point for gear ratios for Sandia in New Mexico, 10/31 c/p
thanks Terry

[LesB]

I'm going to run at Buttonwillow Raceway in September (New Driver).
Lola 342, Formula Ford, 9/31 R&P, with American Racers
The track configuration is Clockwise 25.
What gears should I start with?
Thanks..

[LesB]

I'm going to run at Buttonwillow Raceway in September (New Driver).
Lola 342, Formula Ford, 9/31 R&P, with American Racers
The track configuration is Clockwise 25.
What gears should I start with?
Thanks..

Can anyone help me??
Please....
Les

[Garey Guzman]

Les,
See post #125.

I assume you can do the conversion....

[Ed Erlandson]

I have a 9/31
used in my EuroSwift with goodyear tires 22.5" tall

18/33
21/31
23/28
25/26

If your tires are taller, then you should run lower, meaning
18/34
20/30
22/28
25/27

send a message if you need more info, I run at BW often

Ed

[Bill Steele]

I have a 9/31
used in my EuroSwift with goodyear tires 22.5" tall

18/33
21/31
23/28
25/26

If your tires are taller, then you should run lower, meaning
18/34
20/30
22/28
25/27

send a message if you need more info, I run at BW often

Ed

Les,

I have not run BW 25 but Ed's Swift gears are very tall for a Lola 342 on AR tires, I think if you started with his secondary list you would be getting pretty close.

[stephen wilson]

Any thoughts on NJMP Thunderbolt Raceway gearing for a Club Ford (9:31 R&P) ?

[andyllc]

Looking for gearing for Mid Ohio for a FF.

It will actually be a CF running the hard tires with a 9:31 but gearing from a modern FF would be a good start for us as well (just let us know if it is with a 9:31 or 10:31 so we can convert)

[bhayes]

Last year when I ran my Z16 there, I used these gears...
19/31
22/30
23/28
25/26

This was with a 9:31, runing Hoosier R60's. It may not be the ideal gearing, but it will at least give you a starting point.

[Don Denomme]

Thinking of going to the race at NJMP Lightning course later this month. Looking for starting point on gears for a 10:31 R&P.

Don

[stephen wilson]

Hey Don! I'd check with Jim MacNicholl, he was the man to beat last time! I think he was running The Glen short course gears, but not using 1st gear? I ran LRP gears, 21:30/22:28/24:27/25:26 and ran the same lap times as Jim. I don't know if the extra shift was helping or hurting me!
Steve

[Don Denomme]

These look like 9:31 gears. I can convert them. If not 9:31 they are way off my gears for LRP and the Glen.

Don

[stephen wilson]

Oops, yes they're for 9:31's, I should know better than to forget that!

[captdigi]

Thinking of making the trek from Phoenix for a regional this year. Any gearing suggestions??
John

[W Renna]

Making a come back. Should be ready for the Double Regional end of March. My DB-1 has 10:33 R&P, how about a good starter gear set for Eagle Canyon.

[Michael Bowen]

Hey Walter...Look forward to seeing you back out on the track!! I'll be my first run there too and first time out on the track in about a year. I don't have any idea what gearing to run either... I'm thinking about starting with what I run at motorsport ranch which is

16-31, 16-25, 18-23, 24-26

I also have a 10:31 The straights aren't too long and it looks like there are some pretty slow corners leading into them

Or, you could give Craig Taylor a call and see if he knows...

[M.Sauce]

Walter- Great to hear you are coming back.We should have 12-14 cars if everyone shows up..Michael you should be at the Double National.I would use a 17/33 .20/31,22/30,24/28 to start at Eagles Canyon. Mike Sauce