370Z Pressures
#1
370Z Pressures
Hey guys sorry to do this here but maybe someone (Ruggles?) can help me out.
I will be instructing a friend this weekend in a brand new 370 base/sport with the big Rays rims and oem tires.
Any suggestions on pressures?
TIA
I will be instructing a friend this weekend in a brand new 370 base/sport with the big Rays rims and oem tires.
Any suggestions on pressures?
TIA
#3
It's an autocross school on asphalt. Forecast is 80 degrees. IIRC they are Bridgestone OEM street tires.
Since it's a school we will get a LOT of runs so I want to keep a close eye on the tires.
Since it's a school we will get a LOT of runs so I want to keep a close eye on the tires.
#4
I took a couple of runs in a 350z on Kumho XSs yesterday at a local event. IIRC, the owner ran 38f/33r. I'd start at around 38/36 psi and adjust from there. The Z cars come with little camber from the factory and you don't want to roll over on the sides too much.
On a related note, holy torque batman! I'm not used to the back end stepping out on power like that Z did.
On a related note, holy torque batman! I'm not used to the back end stepping out on power like that Z did.
#8
OEM tires are Bridgestone RE050A I believe on the 370Z. Too bad they come staggered that drastically now, the 350Z's were really nice with a square set up of at least 255 widths all around.
#10
IMO that you're asking the wrong questions.
If you're asking about what tire works good with the camber and suspensaion on the 370z, then, you'd be on the right track like mentioning that the XS rolls under which would be fixed with more camber, and then, the right air pressure.
So with a grippy tire and little negative camber, all you can do is pump that bitch up.
That guy that ran 38f/33r; is that measured at 60 degs in the morning, because once the autox starts, I always think in hot temps so these pressures seem low even for that.
I'm running Hankook Ventus V12 which seems softer and grippier than my SPT's with 46 hot front/ 43 hot rear, and I'll try 48 hot/ 45rear since they only worked better when I got to 46 hot front
Might be some more to go. I'll have pics soon if my photo guys mail my cd.
If you're asking about what tire works good with the camber and suspensaion on the 370z, then, you'd be on the right track like mentioning that the XS rolls under which would be fixed with more camber, and then, the right air pressure.
So with a grippy tire and little negative camber, all you can do is pump that bitch up.
That guy that ran 38f/33r; is that measured at 60 degs in the morning, because once the autox starts, I always think in hot temps so these pressures seem low even for that.
I'm running Hankook Ventus V12 which seems softer and grippier than my SPT's with 46 hot front/ 43 hot rear, and I'll try 48 hot/ 45rear since they only worked better when I got to 46 hot front
Might be some more to go. I'll have pics soon if my photo guys mail my cd.
#11
Thanks for all the advice!
#12
370 runs on average .5 more degree than the 350 (front camber that is), they don't kill the outer fronts as bad as the 350. The factory calls for 35psi all around. I only drove on the RE050a for 800 miles before I sold it, but they are very grippy tires. I think it will be fine for a novice. For a first timer, he won't feel the difference.
#13
#14
I'm so geeked to get back on course now, thanks.
My RX8 is faster and more natural around the cones than the 370z, but the Z car is goofy juvenile fun. Things seem to come up a lot faster, and you get worn out by the end of the run.
Preach slow entry, manage all that extra weight transfer very gently, and apex hella late so you can roll back onto that lovely go-go juice. And really watch the throttle management because that LSD sucks.
Basically, don't drive like me:
My RX8 is faster and more natural around the cones than the 370z, but the Z car is goofy juvenile fun. Things seem to come up a lot faster, and you get worn out by the end of the run.
Preach slow entry, manage all that extra weight transfer very gently, and apex hella late so you can roll back onto that lovely go-go juice. And really watch the throttle management because that LSD sucks.
Basically, don't drive like me:
Last edited by burglar; 04-06-2011 at 10:36 AM.
#15
Row faster, I hear banjos
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From: Charlottesville, VA
What is this lovely "go-go juice" that you speak of?
Seriously, Z's can be a ton of fun to drive and I used to own a 5spd 300ZX TT many, many moons ago. Best of luck teaching at the school Tom. Personally, I tell all of my students driving "stock cars" to set their tire pressures at ~40psi, and we adjust from there if needed. While some cars may be faster on lower pressures, I find the higher pressures tend to make the car more consistent over multiple runs.
Seriously, Z's can be a ton of fun to drive and I used to own a 5spd 300ZX TT many, many moons ago. Best of luck teaching at the school Tom. Personally, I tell all of my students driving "stock cars" to set their tire pressures at ~40psi, and we adjust from there if needed. While some cars may be faster on lower pressures, I find the higher pressures tend to make the car more consistent over multiple runs.
#16
If you're tearing up the sidewalls, keep adding 2 psi until you're not so much.
On a staggered setup or any setup where you seem to plow, you might run 44 hot front and 38 hot - 40 hot rear.
So there you go, don't be shy about pumping em up. Any tire that fits can be inflated to 50 psi cold which would be 56 hot.
#18
Go drive a set of Hankooks Ventus V12's, and tell us performance tires "don't flex much".
Stay tuned; pic coming.
#25
I am not a fan of the RE050a, but calling the V12 a performance tire is really pushing it. I bought a set thanks to the stupid hype it got over the internet, it turns out to be a crappy tire with a sloppy sidewall and marginal grip. If I could get just 80% back on what I paid for my barely used V12s, I would do it right now