Autocross questions

cossie1600 · 04-06-2012, 09:50 PM

Every time I run with them, 3-4 runs seem to be the norm when there are over 120 people. Hopefully they are not as bad as they used to be. Nothing like an event where 5 workers sit in the same corner working.

IMWEZL · 04-06-2012, 10:00 PM

We have the same issue but it's more like five people itch only one guy actually working and the rest admiring the cars, not paying attention to cones.

EazyD · 04-06-2012, 10:05 PM

Quote:

Originally Posted by 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.

If oversteer, would lower pressure or higher pressure help? Not understanding the physics here..

Also I got my numbers on early this year. My first time, I was sticking that tape on in the staging area and missed out on some course walks!

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EazyD · 04-06-2012, 10:08 PM

Why am I still up? I have to leave at 5:15 am. Meeting up with some UMass Motorsport club people for a convoy over to autoX @ The runway track at Fort Devens

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leeyeegue · 04-06-2012, 10:48 PM

It's going to be my first time @ an autox in a week.

I wouldn't say I'm a beginner as a driver... My friends and I go touge at night often. I never use SynchroRev, practice heel toe just about every stop light... But autox you don't shift lol

I've never been to an autox lol... My question is.. Do you guys keep vdc ON or OFF?

And, my tires were done as in 1/32 left around 14k miles from all the touge lol.. How are my new re760s going to hold up for like 5 or so runs? Thanks!

Sent from my SAMSUNG Galaxy Note

cossie1600 · 04-06-2012, 11:41 PM

You are on the stock tires. It will plow going into the turns and the backend will come out or spin one hard exiting.

If you want to go fast, VDC off. RE760 is going to make tons of noise, you are not going to be very fast.

Remember, full tank is required......

cavemancan · 04-07-2012, 12:14 AM

Use shoe polish on the tires to guage tire preasures if you don't have a temp gauge. Mark the tire with the show polish starting at the rim...Accross the side wall until you reach the tread of the tire (about 1 or 2 inches in).

When you do your first lap...if the shoe polish wears out all the way to the sidewall of the tire then you don't have anough air preasure. If it does not wear enough (some tread still has shoe polish) then you will need to take out a little bit of air until you get it just right.

EazyD · 04-08-2012, 11:46 AM

Quote:

Originally Posted by cavemancan

Use shoe polish on the tires to guage tire preasures if you don't have a temp gauge. Mark the tire with the show polish starting at the rim...Accross the side wall until you reach the tread of the tire (about 1 or 2 inches in).

When you do your first lap...if the shoe polish wears out all the way to the sidewall of the tire then you don't have anough air preasure. If it does not wear enough (some tread still has shoe polish) then you will need to take out a little bit of air until you get it just right.

Great idea, Cave.

By the way...... Yesterday, I got first place in the novice class at SCCA (26 novices or so)

Yes, remember to turn VDC off - it is too limiting. Turn car on well before to warm it up and to cool your nerves- and turn VDC off. Don't turn your car off until later or you'll forget to turn VDC off again heh

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IMWEZL · 04-08-2012, 12:10 PM

I was wondering about switching to Tire Class versus regular C-Stock. Would I get a better PAX advantage?

There are three Miatas, two MR2s, and a BMW Z3 in CS and they all run either Hoosier A6s or Kumho race tires. With my current skills the best I have been able to muster up is 4th place. 1st place is a consistent 1.5 to 2 second from my best time.

Any inputs? Racing the Z is great but having close to no chance kinda sucks.

Oh yeah I'm on RE-11s. Securing a set of Hoosiers has its budget constraints along with space (how the heck am I going to get them to events that are 2-3 hours away)

cossie1600 · 04-08-2012, 02:23 PM

I run the street tire index class. For the most part it does its job. If you are the fastest driver, chances are that you will win 90% of the time. If you are the 4th best, chances are that you will finish around that range. I believe the pax is .98 or .985 between the R and the street tires.

Also congrats on the win

IMWEZL · 04-08-2012, 02:51 PM

Also any thoughts on Koni yellows, both on and off the course?

cavemancan · 04-09-2012, 10:52 PM

Quote:

Originally Posted by IMWEZL

Also any thoughts on Koni yellows, both on and off the course?

I can only tell you my thoughts on them in regards to my old Rx8...Best suspension money I ever spent for that car. HUGE difference in cornering plus confidence. Only affected ride harshness by a small margin.

With that said I've heard others mention the ride is way to harsh on the 370Z when combined with Swift springs.

corbin09 · 04-10-2012, 02:18 PM

If you are going to spend that kind of money on only dampers, you might as well buy coilovers. They are nice though.

03threefiftyz · 04-10-2012, 02:29 PM

Since when are koni yellows "that kind of money". They're dirt cheap in the world of motorsport dampers. I'd also disagree heavily that you "might as well buy coilovers."

cavemancan · 04-10-2012, 10:04 PM

Just because it's labled a coilover does not mean it is a superior product. I've heard of Koni yellows plus springs with high springs rates out perform more expensive coilovers. This is not to say certain coilovers are not vastily superior but it does prove the point that the Swift (high spring rate) and koni combo is a bargain for the performance yielded.

Not to mentioned they are widely used, tested, praised, and have a lifetime warrantee. Ding fries are done...I hope to have a pair of Koni's.

04-06-2012, 10:08 PM	#109 (permalink)
EazyD A True Z Fanatic Join Date: Nov 2009 Location: Massachusetts, USA Posts: 1,211 Drives: 2010 6MT Sport pkg. Rep Power: 25	Why am I still up? I have to leave at 5:15 am. Meeting up with some UMass Motorsport club people for a convoy over to autoX @ The runway track at Fort Devens Sent from my iPhone using Tapatalk __________________ 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.

04-07-2012, 12:14 AM	#112 (permalink)
cavemancan Enthusiast Member Join Date: Mar 2012 Location: Miami Posts: 302 Drives: 09 370Z TourSport MT Rep Power: 249	Use shoe polish on the tires to guage tire preasures if you don't have a temp gauge. Mark the tire with the show polish starting at the rim...Accross the side wall until you reach the tread of the tire (about 1 or 2 inches in). When you do your first lap...if the shoe polish wears out all the way to the sidewall of the tire then you don't have anough air preasure. If it does not wear enough (some tread still has shoe polish) then you will need to take out a little bit of air until you get it just right. __________________ 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.

04-10-2012, 10:04 PM	#120 (permalink)
cavemancan Enthusiast Member Join Date: Mar 2012 Location: Miami Posts: 302 Drives: 09 370Z TourSport MT Rep Power: 249	Just because it's labled a coilover does not mean it is a superior product. I've heard of Koni yellows plus springs with high springs rates out perform more expensive coilovers. This is not to say certain coilovers are not vastily superior but it does prove the point that the Swift (high spring rate) and koni combo is a bargain for the performance yielded. Not to mentioned they are widely used, tested, praised, and have a lifetime warrantee. Ding fries are done...I hope to have a pair of Koni's. __________________ 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.

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04-06-2012, 09:50 PM	#106 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	Every time I run with them, 3-4 runs seem to be the norm when there are over 120 people. Hopefully they are not as bad as they used to be. Nothing like an event where 5 workers sit in the same corner working.

04-06-2012, 10:00 PM	#107 (permalink)
IMWEZL Track Member Join Date: Apr 2009 Location: HNL Posts: 603 Drives: 370Z/MKVII GTI Rep Power: 17	We have the same issue but it's more like five people itch only one guy actually working and the rest admiring the cars, not paying attention to cones.

04-06-2012, 10:48 PM	#110 (permalink)
leeyeegue Base Member Join Date: May 2011 Location: Indiana Posts: 230 Drives: 370Z Rep Power: 14	It's going to be my first time @ an autox in a week. I wouldn't say I'm a beginner as a driver... My friends and I go touge at night often. I never use SynchroRev, practice heel toe just about every stop light... But autox you don't shift lol I've never been to an autox lol... My question is.. Do you guys keep vdc ON or OFF? And, my tires were done as in 1/32 left around 14k miles from all the touge lol.. How are my new re760s going to hold up for like 5 or so runs? Thanks! Sent from my SAMSUNG Galaxy Note

04-06-2012, 11:41 PM	#111 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	You are on the stock tires. It will plow going into the turns and the backend will come out or spin one hard exiting. If you want to go fast, VDC off. RE760 is going to make tons of noise, you are not going to be very fast. Remember, full tank is required......

04-08-2012, 12:10 PM	#114 (permalink)
IMWEZL Track Member Join Date: Apr 2009 Location: HNL Posts: 603 Drives: 370Z/MKVII GTI Rep Power: 17	I was wondering about switching to Tire Class versus regular C-Stock. Would I get a better PAX advantage? There are three Miatas, two MR2s, and a BMW Z3 in CS and they all run either Hoosier A6s or Kumho race tires. With my current skills the best I have been able to muster up is 4th place. 1st place is a consistent 1.5 to 2 second from my best time. Any inputs? Racing the Z is great but having close to no chance kinda sucks. Oh yeah I'm on RE-11s. Securing a set of Hoosiers has its budget constraints along with space (how the heck am I going to get them to events that are 2-3 hours away)

04-08-2012, 02:23 PM	#115 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	I run the street tire index class. For the most part it does its job. If you are the fastest driver, chances are that you will win 90% of the time. If you are the 4th best, chances are that you will finish around that range. I believe the pax is .98 or .985 between the R and the street tires. Also congrats on the win

04-08-2012, 02:51 PM	#116 (permalink)
IMWEZL Track Member Join Date: Apr 2009 Location: HNL Posts: 603 Drives: 370Z/MKVII GTI Rep Power: 17	Also any thoughts on Koni yellows, both on and off the course?

04-10-2012, 02:18 PM	#118 (permalink)
corbin09 Track Member Join Date: Jun 2009 Location: Dallas tx Posts: 665 Drives: 370z Rep Power: 279	If you are going to spend that kind of money on only dampers, you might as well buy coilovers. They are nice though.

04-10-2012, 02:29 PM	#119 (permalink)
03threefiftyz Track Member Join Date: Apr 2010 Location: MD Posts: 536 Drives: 03 350z 6mt Rep Power: 16	Since when are koni yellows "that kind of money". They're dirt cheap in the world of motorsport dampers. I'd also disagree heavily that you "might as well buy coilovers."