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These CP-F Tune Racing Harts are forged one-piece.
The finish is Polished SBC (superblack coat) -- (not chromed).
They weigh 19 lb's F, 22 lb's R
Offsets are +26F, +22R
Tires are 245/35F and 275/35R but now I'm thinking 285 on the rear would have been nice... maybe the next set.

Anyway, let me know what you guys think of the new rims!
Thanks!

 

hmmm. those look familiar ;-)

Great choice. I love mine. They really show off the brembos and give the rear a much more aggressive stance.

I went with the 275's also and have the stretched look. I'm planning on going with 285's next time.

 

al503,

You were actually instrumental in me choosing these wheels... I asked you about 'em a while back and you gave me some advice. Man am I ever glad I went with these... I love 'em!

You know I came to the exact same conclusion as you re the 275's versus 285's. Next time I'll go 285 too I think.

I don't know if it's because they're new and really shiny but man, I'm getting a lot of compliments on these -- at gas stations, stoplights, parking lots. They really seem to turn heads...

Thanks again!

 

My G35C-6MT (looks nearly identical to yours) is waiting on these rims. Your tires look like So3's, is that the case?
So you don't see and clearance issues going with 285-35s in the rear?
Has the ride quality chaged noticeably?
Thanx

 

Glad I could help, meta. I get several stares a day. I don't know if they are looking at the brembos or the wheels (or both).

 

Yeah, probably both... since guys would often check out my Brembos when I just had the stock wheels.
Although today a guy in a 350Z passed me, braked, and when I pulled up alongside him he took a picture of my wheels with a cellphone camera and asked what they were. So I ended up inviting him to a local meet we're having this weekend!

 

Quote ***My G35C-6MT (looks nearly identical to yours) is waiting on these rims. Your tires look like So3's, is that the case?
So you don't see and clearance issues going with 285-35s in the rear?
Has the ride quality chaged noticeably? ***

Hi jdove,
I think you'll be happy you got 'em!
Ready for a long post?

Tires
Yeah, you're right -- they're So-3's. Although I read some posts here arguing that T1-S's were better due to being lighter than the SO-3's, whenever I spoke to experienced guys at the track they kept talking me out of the Toyo's and strongly recommended the SO-3's. After 10 or 12 independent recommendations (by guys who have been racing for years in SCCA and semi-pros with sponsors etc.) I decided to go with their advice. As it happened I just got a carbon racing clutch and flywheel installed by KHF Performance here in Canada (the shop owners race a twin turbo 350Z) and when I asked them about tires they also said the same thing... S0-3's (for their grip). Anyway, we'll see how they work out. There are people here who's opinions I respect like Catatfish who make a strong argument for the lighter Toyo's... but I'm happy with the choice I made.

Re: clearance issues in the rear with 285/35...

I don't think they'll be any worse than they are with 275/35's -- meaning that I have minor clearance issues already with the 275's and an Eibach Pro kit. Because the +22 rear offset pushes the rear right out to the edge of the fender, I found that I rubbed briefly once when I had a passenger in the back seat and hit a big bump. Never happened with me alone or with a front passenger... if it did then I'd have to do some fender work (thankfully I won't have to).

Re: Has the ride changed noticeably?
Big time.
But since I installed the Eibach kit at the same time as the wheels/ tires I can't really separate those three variables.

Anyway here's my take on the changes:
If you consider that there's a continuum with ride-comfort/ luxury at one extreme and handling / ability to "feel the road" at the other, then I would say that Infiniti got it right for the majority of end-users by setting the stock ride somewhere right in the middle of that range.

My setup takes thing about halfway further towards the handling/ "feel-the-road" side of the spectrum. I love it.

The downsides:

I immediately found the steering to be less precise with the bigger front tires with more play in the steering. That could also be from the out of spec negative front camber -- since I didn't isolate those changes I can't say for sure what's caused the steering change -- probably a bit of both.

I am actually finding less acceleration by my butt-dyno off the line, which is probably due to my rear camber being about a half degree off-spec too negative, and due to the Eibach's lowering the car, which reduces the "squat" or weight transfer over the rear wheels when lauching off the line. It might also be due to unsprung weight issues with the fat wheels/tires (greater peripheral rotational mass) -- not sure.

The other problem is understeer with the grippier rears. The wider track due to the aggressive offsets in the rear adds to the understeer. On top of that the disproportionate negative camber on the rears (relative to the fronts) will exacerbate the understeer even further.

These are theoretical problems at this point, since I'm breaking in my carbon clutch and haven't taken this setup to the track or driven more than 6/10ths so far.

The Hotchkis sway set soft on front and stiff on rear should help remedy much of the understeer... if not then the front sway will come entirely off the car. For the track, I want a neutral balance or slightly leaning to oversteer. For the street I want neutrality leaning towards understeer.

We'll see how things go at the track, since lap times is a great way to quantify all-round improvements.
If things don't look good performance-wise, then Plan B is to use these strictly for the street and get some ultralight 18 (or even 17") wheels for the track with dedicated track tires.
(plus then I can do donuts again when the mood strikes me ;-)

 

<blockquote><font class="small">In reply to:</font><hr>

For the track, I want a neutral balance or slightly leaning to oversteer. For the street I want neutrality leaning towards understeer.

<hr></blockquote>

If you are trying to get a very neutral stance, and then use the sways to adjust between that fine line of track oversteer and street understeer, why did you go with the massive rear width? It just seems like you will have to fight the 285s and that will make your task much, much more difficult--sacrificing other aspects of the suspension. Hopefully the sways will get the job done for you though.

Is it more of a looks first, track performance second? The 19s also seem to point to this as well.

I know I am not the most knowledgable about this stuff, I just wanted to see if there something I am missing as it doesn't make sense to me.

By the way, those are gorgeous rims!

 

I'm running the same wheels with:
1. hotchkis sways (soft front, med rear) transfers about 83% stiffness to the rear
2. RSR Ti 2000 springs made for the 350z, transfers about ~12% stiffness to the rear
3. 245/35 and 275/35 Eagle GS-D3's.

Even with the stagger, my balance is dead on neutral as far as I can tell on some twisties. I'll be able to verify this next friday when I go out to PIR.

I think much of the understeer is coming from the eibach springs which actually transfers a great amount of stiffness to the fronts. The sways can compensate some but it won't get rid of all of it.