Who's making the move to STU?
 

It's about damn time...I think I'm going to make the jump from BS. :driving:

I'll be there in 2019. I want to start having discussion on what all we think needs to be addressed on these cars in order for them to compete. We had a short one in the last pages of the autocross thread, but I think the conversation merits its own thread.

So far for my build I am looking at fortune coilovers, z1 camber products and 2 piece rotors, and after discussing it with other forum members, a os geiken lsd.

That's for 2019 anyways. I want to hold off on the remaining allowances until I see how things play out.

What things were you planning on doing and when would you make the jump?

edit: The Nismo models were recently approved as well. Should be good fun.

A build list would be fun! It all depends on funds as well...

For me...

Timing - 2018 season, but waiting for the weather to warm up and salt to come off the roads.

1) 18x10's and 285 RE-71R's at all 4 corners. What offset front and rear?
2) Intake
3) Tune? I'm not 100% clear on the SCCA's verbiage and allowances...
4) JRZ or KWv3?
5) Camber plates
6) OSG - maybe 2019
7) Front bar (carryover from BS)
8) Exhaust (carryover from BS)
9) Brakes...more than happy with the stock/sport set up
10) Seat and harness

Just my thoughts on your list

Also if you get bored, you can always throw a set of Hoosiers on it and have a fun BSP-ish car. ;)

always trying to get folks to the dark side.

Sorry...meant the Camber Kit that eliminates the eccentric bolt and holds your alignment. New control arms...some day.

Currently have 18x10 Forgestar rears...would be cheaper just to get another set of 18x10's with the correct offset for the front.

What spring rate do you recommend for rear?

I have 900 lb/in springs in the rear but that's probably too much for a non-aero, non R-comp shod car.

for the z, these are one in the same. there are more eccentric eccentric bolts, but most of the camber kits on the market involve replacement of the upper control arm for the front, and the two lateral links in the rear.

https://i.pinimg.com/564x/ef/66/8a/e...a63b7ed9a9.jpg

One of the wheels I am looking at comes in a 10.5 +22. I happened to have a set of 25mm spacers which would put my stock wheels right where the perspective wheels would be. I took a few photos of how it went. This is on my cars "bad side" it has about -.7 to -.9 degrees of camber depending on the shops rack, but none the less it sucks. From what I saw, I think the the 10.5 +22 will be able to fit no problem once camber is in the -2.5 to -3 range. Other members in this section are running wider with r compounds so I don't think hitting the max wheel and tire allowance will be an issue.

http://www.the370z.com/members/brend...322-164503.jpg

http://www.the370z.com/members/brend...322-164701.jpg

http://www.the370z.com/members/brend...322-164448.jpg

None the less, my plan is to get the suspension sorted and wait until the following season or mid season to replace the wheels. There is always the chance that more options will become available the longer I wait.

My STU Build List if I keep my car:

18x10 (Volks of some sort) w/285 RE71R
z1 FUCA
Front bar
Berk HFC
Exhaust something to stay below 100db lol
z1 2 Piece Rotors
Penske 7500DA
1000lbs front/896lbs rear springs. Change as necessary
OS Giken
Race seat of some sort. New SCCA rule Race Seat + mounting equipment must weigh 35lbs.

Spoke with a couple of veteran and they recommend tires, suspension and differential as the 3 must haves.

I am doing a slow ghetto build. Trying to be ready for 2019.

Currently I have

Wheels:
18x10.5 +25 wheels. 20mm spacers in the rear. 275/35/18 RE71R

Suspension:
SPC (front and rear) camber arms and toe bolts (Old style front arms)
Eibach front bar
3011 Koni double adjustables
Megan Hi/Low spring perch

Diff:
OS Giken

Power:
Kinetix HFC
ISR Y-Pipe and Single exit exhaust
MAF Tubes and K&N Filter

I want to add these sometime in the future:
Z1 2 piece rotors
Z1 Intake
Poly subframe bushings
Lightweight battery

Going to try to skip the header, since it seems like a PITA. Hopefully, the 12+ coolant/oil heat exchanger is sufficient for oil cooling.

You seem most of the way there. What spring rates are you running and how did you decide?

Right now is 900 all around, I tried it on 1100/700 and the car was miserable. It will probably change around.

What didn't you like about the first combo? I have an idea, but I would like to know your thoughts.
Also, did you run that without a front sway bar?

It was too pushy, I had the Eibach bar already.

FYI the z1 FUCA's are technically illegal in STU.

I ran my first event in STU trim this weekend with 285sq'd (18x10.5)
It was 35 degrees.. it's a shame being sideways eats up so much clock :rofl2:

why?

Confused about this too. Only possible illegal aspect I could see is if the metal to non-metal content is off versus the factory FUCA. If someone protests you for that with these particular arms they deserve to be ridiculed by everyone around.

Dumb question, but where would you get your 1000lb/896lb springs from? I don't think there is such an off-the-shelf offering.

896lb/in is 16kg/mm. Swift offers that.

Eibach and Hypercoil has 1000lbs

Is that what you were asking?

Balljoint metal content is different than stock.
It'd take a true asshat to protest over something like that -- but it's something to be aware of.

lets talk coilovers for a minute. I want to go with something in the $1500-2500 range. I want the dampers to be able to be serviced in the states. I know I can get this from Fortune with their 510 series. I also know that the mcs single adjustable are around this range. Looking for thought and feed back on other options to consider.

I trust the guys who actually use their cars over the opinions in the general suspension section.

What systems are out there which do not change the rear to true coilover? I'm aware of KWv3, but are there others?

You don't have to get the springs from the people you get your dampers from. So long as the dampers are valved correctly for the spring rate you will be using that's what matters.

I have AST dampers and when ordered I just told them to supply springs to the specs I gave them (diameter, free length, and rate). I'll probably be picking up more springs in the near future to test some alternate spring rates.

Many of the good ones do not. AST, KW, Ohlins, MCS, MCA, Fortune, Penseke. Also like Gomer mentioned, if a company makes a good damper but it's a true type, you can always order up a set of rear perches to mount in the stock location.

You can talk to ProParts for some 28 or 30 series Konis

looks like they have a kit fot the 350. wouldnt be too hard to have them do the same for the 370

I disagree. I contacted the SCCA before I bought the z1 FUCA Street kit to run STR (last year). They looked it over and gave me the green light. I have the full email conversation.

Without doing a deep dive into the 370z's specific metal to non-metal ratio for stock bushings, all they were most likely commenting on was the fact that it "appeared" compliant. The guys at the SCCA main office aren't experts on every vehicle ever made.

As was previously pointed out, you most likely have nothing to worry about unless you come up against a someone willing to suffer the ridicule a weenie protest like this brings upon the protester.

I only see a rule regarding the bushing material. Not metal content of balljoint as was stated earlier.

Improved by 0.7 after some changes but no video

I reached out to Jeff Wong at Proparts. They can rebuild Megans for me but I did not specifically ask about Konis. I wouldn't rule it out, but I was surprised it wasn't the first option recommended.

I would for sure consider those. Don’t let internet reputation deter you.

The main thing they have going for them is the price. If the budget changes they seem like a viable option. I think I would prefer something more robust though.

So after everyone here wanted the 370Z reclassed to STU not a single one of you can make it to Solo Nats? :shakes head:

I prepped my C5 FRC for STU instead. :usa:

I was coming! Spun a bearing last weekend

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What happened?

Next year :)