The Official 370Z Autocross Thread

[Justint5387]

I forgot about the SP prep level, can you run a surge tank or a Holley hydramat in SP?

I think the 370z can compete with the Evo as well, but not being able to be competitive at pro solos would discourage some people, which is why I think it should be in BSP. But we already saw the SP is dead thread on the other forum :P

I want STU to happen for the 370Z, maybe i can bolt on some 295 or 315 to do some events in SP.

[03threefiftyz]

I'm......not sure my 2014 car wouldn't have run at the front this year and the 370 would make ~50whp more than my DE at not a huge weight penalty....so IMO it would be a favorite on "some" courses.

I still think the MSM is the car and I saw that in 2014, wrote a letter to have it bumped to ASP, which was denied...so I took it road racing.

[gomer_110]

I'm probably crazy but I would see the MSM as a better fit in CSP (ignoring the fact that ASP and SSP are supposed to be the faster classes). They make more power than the CSP miatas but also weigh more (from what I've been told). Also size wise they're equivalent. Let's just make CSP the all miata class.

[03threefiftyz]

Originally Posted by gomer_110

I'm probably crazy but I would see the MSM as a better fit in CSP (ignoring the fact that ASP and SSP are supposed to be the faster classes). They make more power than the CSP miatas but also weigh more (from what I've been told). Also size wise they're equivalent. Let's just make CSP the all miata class.

There is at least one person on the SPAC that is in CSP (think there is two right now) and no way that happens unless all miata's stay on the same line...which means current CSP cars running the turbo motors. I don't see that happening.

I'd prefer just have them in ASP where at least they fit in with the turbo cars (for the most part...and the 370's/Caymans).

[gomer_110]

Originally Posted by 03threefiftyz

There is at least one person on the SPAC that is in CSP (think there is two right now) and no way that happens unless all miata's stay on the same line...which means current CSP cars running the turbo motors. I don't see that happening.

I'd prefer just have them in ASP where at least they fit in with the turbo cars (for the most part...and the 370's/Caymans).

Well aware of this. Looking at the results from Nats this year though does tend to suggest the current CSP miatas and the BSP MSM's are pretty equal. Hell Billy and Neal both beat Edens on raw time.


1 Billy Davis CSP 106.376 1
2 Neal Tovsen CSP 107.301 2
3 Chris Edens BSP 107.968 2
4 Bob Davis CSP 109.302 3
5 Anthony Porta BSP 109.404 3
6 Stephen King CSP 109.456 4
7 Frank Likert BSP 110.575 4
8 Todd Cochran CSP 110.737 5
9 Tim Maxcy BSP 111.956 6
10 Heath Maxcy BSP 112.48 8
11 Bob Neff CSP 112.697 6
12 Steve Eberlein CSP 113.149 7
13 Larry Burrow CSP 113.707 8
14 Noah Feldstein BSP 115.411 14

[Justint5387]

370Z are classed for STU in 2018.

https://dk1xgl0d43mu1.cloudfront.net...pdf?1508769569

I didn't know the 987.2S were classed in STU already, not sure why it was such a big fuss to class the 370Z there.

[zpower86]

Originally Posted by Justint5387

370Z are classed for STU in 2018.

https://dk1xgl0d43mu1.cloudfront.net...pdf?1508769569

I didn't know the 987.2S were classed in STU already, not sure why it was such a big fuss to class the 370Z there.

Is it official yet? Or just the recommendation?

[Justint5387]

It's recommended for 2018. Which means unless the BOD opposes it, it will go through. The BOD almost never overturn a classing change.

[Brendan]

Originally Posted by Justint5387

370Z are classed for STU in 2018.

https://dk1xgl0d43mu1.cloudfront.net...pdf?1508769569

I didn't know the 987.2S were classed in STU already, not sure why it was such a big fuss to class the 370Z there.

There were a lot of cars in the class that justified the z being there as well. The STR classing was a misstep from the start.

woot woot. STU build after one more season in BS for me then.

[Brendan]

With the stu move on the horizon, what range of offset would it take to fit a 10.5", maybe 11", wide wheel up front with a 285 or 275? I know it's possible to run that wide stock but I'm unsure what will need to change if we use a wider wheel. I know it has been covered in the general section but I am hoping for feedback from folks who use their cars the way I do.

[gomer_110]

As a point of reference, I have 18x10 +30 wheels up front wrapped in 315/30 Hoosiers.

I would think the 18 x 10.5 Enkei RPF1 is the wheel you're looking for. iirc that's the wheel the STU 350z's have been using.

[Brendan]

Originally Posted by gomer_110

As a point of reference, I have 18x10 +30 wheels up front wrapped in 315/30 Hoosiers.

I would think the 18 x 10.5 Enkei RPF1 is the wheel you're looking for. iirc that's the wheel the STU 350z's have been using.

Is this it? The offset seems like it would be pretty high for the front.

Enkei RPF1 Wheel - 18x10.5 / 5x114.3 / +15 (F1 Silver) | Evasive Motorsports

[gomer_110]

Yeah that's the wheel I'm talking about. Offset isn't that crazy. As I said above this is the wheel that a number of the STU 350z's are running. Also iirc one or two of the Pirelli world challenge 370z's were using this wheel.

For reference the Enkei wheel would only be ~1/2" more "poke" than my setup in the picture below. You will need a spacer for the rear though.

Untitled by Matt, on Flickr

[03threefiftyz]

Most top STU 350's are on 11's actually...and you definitely want an 11" or wider 315 A's.

[gomer_110]

Originally Posted by 03threefiftyz

Most top STU 350's are on 11's actually...and you definitely want an 11" or wider 315 A's.

Well aware of this. Just hard to drop the coin on new wheels with everyone trying to kill the SP category these days.