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First track day shakedown

Originally Posted by Zauskycop I instruct at the Chicago Region PDX program, and I know *I* would! I am still learning some finer points of the car but so far

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Old 08-09-2014, 12:43 PM   #1 (permalink)
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Originally Posted by Zauskycop View Post
I instruct at the Chicago Region PDX program, and I know *I* would! I am still learning some finer points of the car but so far I love it in the 4 track days I have done.

My latest "aha" moment came when I was understeering a bit (Whiteline front sway, stock rear) in steady state corners. Normally it would mean too much speed, or too much steering angle, and I tried both with limited success. So I tried to give more throttle and it worked! Basically I think you are using the on power oversteer that is inherent in the car to balance out the off throttle understeer?

Still have stock suspension underneath, and this may all change when I go to a square setup and put SPL arms on the car, but it was rather enlightening to me using power in the car...quite a change from a 125 hp Spec Miata!!!

Tracy Ramsey
Thanks Tracy! Do you feel you can drive the hell out of it like you can the Miata?

It's hard for anything to compare to an SM car. They're phenomenal through the turns and will reward you with a little more straight line speed. I just don't want to drive one everyday. I'm making the change from an ITS RX7. Less power than the Nissan and decent (at best) through the turns. I'm just trying to consolidate everything into 1 car.
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Old 08-22-2014, 07:31 AM   #2 (permalink)
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Thanks Tracy! Do you feel you can drive the hell out of it like you can the Miata?

It's hard for anything to compare to an SM car. They're phenomenal through the turns and will reward you with a little more straight line speed. I just don't want to drive one everyday. I'm making the change from an ITS RX7. Less power than the Nissan and decent (at best) through the turns. I'm just trying to consolidate everything into 1 car.
Drew, my Z is a replacement for a Miata and I raced SM for a brief moment in time.

The Z will be a great track car but its not quite there yet. I'm trying to take baby steps with it to get the balance right but due to work, I haven't gotten as many track days as I would like to test it out. Next one is Grattan mid Sept.

Since my last post I installed a 25row Z1 oil cooler kit. Amazing difference in temps so I think that problem is solved. I was very concerned running at 260 degrees before.

The brakes will still need some attention as I want more cooling. I've got some ideas that'll be mocked up in the next coming weeks. I'll post pics as I get it worked out.

As for handling, the Z is good but not Miata great. The power is there to rotate the tail however there is a definite understeer issue that needs to be worked out. Unlike an SM you can't mash the throttle...a little more dexterity will be needed. I'm going to start with an alignment to get as much camber as stock parts will allow and possibly wider fronts since mechanical grip is always my first step. If that doesn't correct it well enough then I think the adj control arms for more camber.

From the feel of it I don't think heavier sways in the front will help with the Nismo package. Its already got heavy bars and not a lot of roll.
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Old 08-22-2014, 10:22 AM   #3 (permalink)
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Drew, my Z is a replacement for a Miata and I raced SM for a brief moment in time.

The Z will be a great track car but its not quite there yet. I'm trying to take baby steps with it to get the balance right but due to work, I haven't gotten as many track days as I would like to test it out. Next one is Grattan mid Sept.

Since my last post I installed a 25row Z1 oil cooler kit. Amazing difference in temps so I think that problem is solved. I was very concerned running at 260 degrees before.

The brakes will still need some attention as I want more cooling. I've got some ideas that'll be mocked up in the next coming weeks. I'll post pics as I get it worked out.

As for handling, the Z is good but not Miata great. The power is there to rotate the tail however there is a definite understeer issue that needs to be worked out. Unlike an SM you can't mash the throttle...a little more dexterity will be needed. I'm going to start with an alignment to get as much camber as stock parts will allow and possibly wider fronts since mechanical grip is always my first step. If that doesn't correct it well enough then I think the adj control arms for more camber.

From the feel of it I don't think heavier sways in the front will help with the Nismo package. Its already got heavy bars and not a lot of roll.
Youre going to find the car increasingly frustrating as you start to do the things you think are easy for track work. Understeer is just related to lack of negative camber up front and perhaps toe settings. Also need plenty of tire up front too (nothing less than 285 in my opinion). SPL's adjustable upper arms are decent and allow caster adjustment as well.

If you dont make major changes in springs you will need a big front bar. It helps keep rear end planted annd does help with rollover. Overall just reduces need for so much neg camber. Hocthkis is decent cheap adjustable bar.

Oil temps. be careful your running upper end right now. Id go for biggest cooler you can mount. Also be waware if you go with sticky tires the cars have oil starve issue as well. ...speaking of starve get one of Phunks suel starve kits or you will be doomed to running full tank of gas forever.

Brakes. Be very very cautious. If you are serious track guy and like braking deep the OEM abs system will bite you with Ice mode eventually. First time it happened to me I almost $hit my pants. Had to throw car sideways into turn to slow myself down. Important to now the 370Z is heavily rear brake biased in stock form. You should keep that in mind when making pad choices.

These cars handle far better than any SM I have seen on track. I pass them in turns all the time in the Z. I
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Old 08-25-2014, 06:37 AM   #4 (permalink)
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Oil temps. be careful your running upper end right now. Id go for biggest cooler you can mount. Also be waware if you go with sticky tires the cars have oil starve issue as well. ...speaking of starve get one of Phunks suel starve kits or you will be doomed to running full tank of gas forever.
Definitely something I'll need to look into. I hadn't heard of oil starving on these cars as an issue. For this summer I'm sticking with OEM tires but I'll look for better options over the winter while its in storage.

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Brakes. Be very very cautious. If you are serious track guy and like braking deep the OEM abs system will bite you with Ice mode eventually. First time it happened to me I almost $hit my pants. Had to throw car sideways into turn to slow myself down. Important to now the 370Z is heavily rear brake biased in stock form. You should keep that in mind when making pad choices.
I had "ice mode" happen to me on the street and ya, I nearly messed myself. For the brakes I'm running upgraded pads plus I'm looking at ventilation options for improved cooling. The ABS is a whole different story and as this is still a street driven car, I'll just deal with it.

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These cars handle far better than any SM I have seen on track. I pass them in turns all the time in the Z. I
Well the Z is definitely faster but for tossibility into a corner the properly setup Miata is hard to beat.
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Old 09-02-2014, 04:35 PM   #5 (permalink)
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These cars handle far better than any SM I have seen on track. I pass them in turns all the time in the Z.
I've not driven a 370 on the track but I find this extremely difficult to believe.
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Old 09-02-2014, 05:50 PM   #6 (permalink)
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I've not driven a 370 on the track but I find this extremely difficult to believe.
Good tires and a little - camber up front and you can out corner most cars out there. Im talking HPDE 3 and 4 level cars ... the TT boys have a bit more invested in performance parts but, the Z will hold its own and then some
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