No aero?

Wstar have you tried oem rear sway?

No aero yet, not planning on it for a little while. (And no, unfortunately I tossed my OEM rear sway ages ago, before I realized it might be nice to try it with the Hotchkis front!).

You want one? I've got one taking up space in my shed. I'm local and you can have it for $25 or a bottle of bourbon.

Sure, sounds great, thanks :) I'm out at TWS this weekend and pretty busy up until then, but I'll figure something out with you next week to meet up.

Sounds like a plan.

Buy my WL :tup:

Ok, so I swapped out my 18k front springs for 14k and my 14k rear springs for 12k.

Re-installed my whiteline sway bar in the rear. Moved whiteline front bar to full stiff.

Now... I need to adjust the perches as this lowered my car about 2"! I also need to buy some new tires. Tried to order a set of federal RSR's... Cause they were ultra cheap. I received an email today saying they were out of stock...

Back to the drawing board!

How did you like your RS3's Mike? I have a set of 275 square for the stock sport rims I need to put on soon (33k miles on the re050's is more than enough) that I'm debating autocrossing on. Other options are my r888's I use mainly for HPDE and a set of big ole Hoosier A6's I was hoping to save for when I have a bit more seat time. 18's are a tough size for tires for this car! My enkeis with the toyo r888's take a 275/40 to keep near stock diameter. Odd sizing

Once Sept hits, I'll probably have 10-12 sets of 315 and 335 A6's for sale, FWIW. Most will have 12-30 runs on them. They'll be for sale at substantially less than sticker tires cost.

I liked the RS3's just fine. Great tire that handles heat well.

I don't like the new price gouging of the RS3's... up $200 a set...

I remember the good ole days when RS3's were $500 a set.

Hey Mike, this is Jeff (Blue CS 370z, we talked at El Toro)

I just checked TireRack and noticed that they V2 RS3s seem to have gone down in price from when they originally went on sale a few months ago. My 275/35/19s went down about $44 a tire ($356->$312), so now they're priced about the same as the 200TW V1 RS3s (before they went on closeout). 255/35/18s are $227 a tire.

Good to know. Hopefully, the car will just be moved to STU for next season and I can invest in some 285/35's.

Btw Jeff, do you ever run into ABS lock up with your Z? What pads are you using?

Stock pads. I run into what I'm pretty sure is ice mode a lot on asphalt, and it's pretty miserable when it happens, but I haven't had problems with it on the concrete at el toro.

Hi Mike,
How have things been going? Have to admit at the Farmington Pro in 2013 (was there in my '67 Camaro in STX) I remember seeing your car and thinking to myself "Hmm, a 370 would be fun in STR" - year and a half later, I have one, and am looking at STR prep.

Some questions I haven't seen clearly answered elsewhere, though there's still more research to do-

• Kinetix front upper arms can get enough camber with a little modification?
• Are any rear arms needed to get camber where we want it once lowered (something like -2 to -2.5)?
• Does the Uprev Osiris tuning capability close the throttles faster on lift? With the stock computer it seems to wait half a second to do so when you lift, which as a right-foot-braker, messes things up sometimes.
• What parts are needed to run 2.5" diameter rear springs with ride height adjustability in the rear? And what length spring assuming rates in the 700-850 range as a starting point?
• Is the 1.5-way OS Giken "the way to go" or has anyone found benefit to another option - either 2-way, 1-way, or another brand?
• Any "must do" bushings besides the rear diff?

Not trying to muck up your thread, just thinking we can keep this the place people go for 370Z-specific STR info.

Thanks!!! :tiphat:

Different Mike, but I'll take an initial stab....fWIW, I've been pretty happy with the Cusco RS 1.5 I have in the BSP car, but it took some finangling to get right. At least with the 350z, we have all had to modify the Kinetix arms (thinner jam nuts and grinding down the thread portion of the A-arm to get enough camber). Even at my ride height, I got more camber out of offset bushings than the Kinetix arms as they were shipped. You can get the rear spring perches from BC, Stance, Megan, etc for not much money. I have used the Megan for 3-4 years now without issue (and so has Peters in STR/STU). You can tune throttle latency and saturation with UPREV. Can't comment on the bushings for a 370, but the compression rod and front lower control arm bushings are a once a year replacement if you use stock on a 350z.

Very cool. Wish I would have known someone was looking to build one... As mine is now for sale mostly prepped. (Baby on the way...)

Anyway, race today... But I've learned a lot this year and can certainly save you some time. I'll try and get on tonight to answer all your questions.

Maybe just sell your stocker and buy mine.. I'd cut you a hell of a deal. ;)

Thanks for the info Mike and Mike! Could either of you post a link to the rear spring stuff you got? The Megan and other parts I find for the 370 all seem to want to work with their own wacky springs, not the normal 2.5" stuff.

For the Uprev, do I have to buy a copy? Or if I take my car to a tuner who already has the software, can he just use it on my car?

Since we have to run cats, is there much gain in catted longtube headers vs. stock manifolds + berk HFC? What's the best dynos you guys have seen of ~ST prep 370's?

For those not familiar with the ST rules, we are allowed to do:
Headers (but must maintain cats in roughly the stock location - cats can be aftermarket)
Cat-back exhaust
Cold air intake (up to throttle body, have to keep stock MAF sensors)
ECU tune (up to 100 octane fuel, no e85)
Crank and accessory pulleys

You have to call Megan, BC, Stance, etc....they don't list them separately. At least for the 350z....they use 2.5" springs. The popularity of "true" coilovers has left all of those guys with all sorts of rear spring perches on the shelf. You will want to find an UPREV tuner (there are a bunch), but you can also buy the tuner version for more money.

Rear subframe bushings - need to be done? Made a big difference on my 240sx, and Brian talks about them on the 350. I see there are some solid aluminum (illegal) parts out there for the 370, but not the normal delrin stuff?

Got some parts put together - wrenching starts soon
Ingredients for the STR recipe « J-Rho's '67 Camaro Z28 STX build

subscribed :tup:

First drive today with it put back together: First drive in STR trim « J-Rho's '67 Camaro Z28 STX build

http://www.rhoadescamaro.com/build/w...717128_iOS.jpg

You might have heard the scraping from where you live... ;-)

First event in STR trim under its belt:
370z first runs in STR « J-Rho's '67 Camaro Z28 STX build

Damn I miss Qualcomm. I used to live across the street so Friday nights and weekends were always fun. Nice driving!

nice driving indeed! looked like fun!

Damn looks like a hell of a time !!!

Nice driving Jason.

Subscribed. Any insight on your use of Spc vs SPL suspension parts? I'll be installing my Whiteline sway bars shortly.

SPL parts use spherical bearings which are against the rules in Street, Street Touring, and Street Prepared classes.

End links can be spherical in street class. There's no rules on those. However actual suspension like control arms etc cannot use spherical bushings unless it came from Nissan that way. I use SPL end links in street class.

Not sure of the rules but maybe you can install some Craftsquare mirrors to help with visibility on the driver side.

Hey, so... I don't have enough time at the moment to read through your build.

However, I'll share what Ive learned...

You might want softer than 12k rear. The last setup I tried was 14k front / 12k rear and it did make a noticeable difference.

I kept on adding more and more positive camber in the rear. The rear just build soooo much camber upon compression... it's nuts. I'd honestly try -1.5 rear and -3 front.

The brakes are awful. Dont use anything but the stock pads. Every once in awhile (even with stock pads) I'd flat spot all 4 tires. That's my biggest reason for not wanting to campaign the car anymore. I could never figure it out. Sometimes I'd just be trail-braking in and... wham... the front tires lock up and I just flat spotted the crap out of them. That was just so frustrating... and expensive.
I dont think this problem was very common with stock suspension... however, the stiffer the rates... the worse it seemed to be. This cars brakes killed my confidence.

You'll need a full tank of gas or else you'll fuel starve. As you know, the tank is huge.

I modified a set of kine / AmS camber arms and got -3.2 front. That's your best bet.

The car will make 300 whp with just high flow cats and a tune. That's plenty until you've figured out the suspension.

I'm selling a set of bride seat brackets and the modified front camber arms at the moment. just an fyi.

Best of luck! Hopefully they'll move the car to STU where it belongs!

You mean the brakes are excellent and the STR [strike]tires[/strike] class arent suitable for the weight of the car.

What happened to your ABS?

I'm sure it could be a tire/grip issue. However, the cars dont seem to have this problem in stock trim.

The abs works fine most of the time. Just every once in awhile... randomly, they'd lock. I tried multiple compounds and made sure everything was clean and we'll maintained... no idea what caused it.

Trust me, I did tons of research. Any course that required a brake stomp would make me super timid.

Yes you are correct, I should have been more specific. Actually my SPL end links for up front just showed up a few days ago.

Second place at the ET Pro. Still plenty to do to get the car dialed in, and myself dialed in to it-
SD Tour and ET Pro 2015 « J-Rho's '67 Camaro Z28 STX build

awesome driving. Balance of the car seems really good. It seems like car has a much better control during over steer vs. street class 370Z.. It seemed like more easy to control vs the snappy oversteer in stock/street form. Can't wait to see how it does next!!! :excited:

I think the improved LSD in Jason's car has quite a bit to do with toning down the snap of the oversteer. :)