Autocross questions

cossie1600

Does aero actually work at autox speed?

03threefiftyz

10" wing at 60 degrees creates 60-70lbs of downforce at 60mph...depending on shape.

cavemancan

I am not happy with the bounciness of the stock springs. Car drives amazing but those springs gotta go...don't care if I end up in BSP. I was in BSP with the Rx8 before so whatever. BSP it is.

Getting Swift springs, Camber kit, and possibly spacers this week. Does anyone know if removing the stock mufler canister and extending the pipes out will yeild any power?? I doubt it. I may do it anyway just to hold me off sound wise till I buy an exhaust.

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Mazda Rx8 MT Titanium - SOLD!
2009 370Z T-Sport MT Black - Takeda Intake, Swift springs, Rear Camber kit, SS B Lines, FI Exhaust, Z Speed CMAK Flywheel/Clutch Kit, Stillen Brake Cooling.

03threefiftyz

You think it will be magically less bouncy if you add spring rate? It's a shock issue.

cossie1600

I wouldnt worry about class issue if you run off the shelf springs

cavemancan

Springs are cheaper and it will help. I am not implying this is the solution. I plan on buying Koni yellows in January. That will really bad ***!

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Mazda Rx8 MT Titanium - SOLD!
2009 370Z T-Sport MT Black - Takeda Intake, Swift springs, Rear Camber kit, SS B Lines, FI Exhaust, Z Speed CMAK Flywheel/Clutch Kit, Stillen Brake Cooling.

EazyD

I am going to autoX at Fort Devens (Ayer, MA) tomorrow. I am a beginner.

Do you guys ever shift into 1st? I wouldn't think about doing that normally, but with SRM...

What is a good place to get numbers? What kind of number will be able to peel off without harm to paint?

Will a motorcycle helmet work? (SCCA)

Thanks in advance.

Here's my first and only autocross event September 2011 :

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Pearl White 2010 370Z Sport, Stillen CBE, tint, K&N drop-in filters, GT-R start button, Kenwood DNX-6980 with backup cam, LED bulbs, Raceseng shift knob.

spearfish25

Very slow corners such as hairpins can be 1st gear turns. I've found that my quickest runs of the day are when I throw caution to the wind and start trying various portions in first. Downshifting to first and keeping the RPM has tended to be faster than keeping it in second and trying to lug the RPM back up past 3k after a slow turn.

You can use painters tape (the blue tape in your picture) for numbers. Many events usually have a local guy selling magnets which work great...just not on the doors.

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2013 Cadillac V-Wagon, RIP Z

ChrisSlicks

I'll be there right behind you on Sunday!

Unless the corner is super slow and you are bogging down below 3000 rpm I wouldn't bother trying to shift to first. You'll either balk the gear change (even with SRM) or spin the tires and break traction.

SCCA allows M helmets provided they are 2005 or newer (same goes for SA).

Just use tape for your numbers for now. If you get a permanent number and are going to be a regular then buy a set of vinyl numbers.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

EazyD

Aw man, well I couldn't get registered in time before they ran out of spots. I do wish I did that event because this SCCA event has 163 registrants ... so I'll be lucky to get any seat time at all.

I'm in the novice class up against a GT-R ಠ_ಠ

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Pearl White 2010 370Z Sport, Stillen CBE, tint, K&N drop-in filters, GT-R start button, Kenwood DNX-6980 with backup cam, LED bulbs, Raceseng shift knob.

cossie1600

SCCA event sucks for novices, go find a local club where you can do more runs.

You can grind 1st gear even with the SRM, been there and done that

ChrisSlicks

Too bad you couldn't get in for Sunday with NE-SVT, that is one of the clubs you want to get in on as a novice since you will get 9-10 long-course runs and have access to good instructors. The other two clubs to get in on are BSCC (Bay State Corvette) and TCUSA (Track Club USA) as they are all the same crowd, use the same timing gear and are novice friendly.

There is a BSCC event on the 21st of April but I don't think I'll be able to make that one since I will be going to NHMS on the Monday.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

EazyD

Thanks.

Good to know. If you remember, message me when you are signing up for these things

Maybe it's better I do only 5 runs... less wear on the Z

BTW - tire pressure for our car? I have stock Potenzas with only like 3/12 or 4/12 tread left. Sport wheel widths

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Pearl White 2010 370Z Sport, Stillen CBE, tint, K&N drop-in filters, GT-R start button, Kenwood DNX-6980 with backup cam, LED bulbs, Raceseng shift knob.

cossie1600

With 160 people, I don't know how you will be able to do 5 runs. I can't believe their turnout, I guess autox is becoming popular again. Good luck.

ChrisSlicks

I only got into this one because I have an in, otherwise I would have been on the sidelines It's spring fever right now, it should die down by the end of the month. I'll let you know the next one.

For the stock tires I would start with 38 front, 35 rear. It's going to be cool out so adjust pressure as you need based on understeer/oversteer response.

Seems to go in cycles. 5 years ago they were selling out months in advance, 2 years ago we were short on people.

SCCA here always has at least 100 people and gets 5-6 runs depending on the turn out. It's a long day with them. With our clubs we're done by 4:30 and have 9-10 runs because we cap it to 55-60 cars. Because of the course layout we can have up to 5 cars on course at a time so things don't really slow down by making the course longer.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms