2014 STU Discussion!
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
^^ Those wheel rates aren't right, MR wasn't squared.
0.688^2 * 1000 = 473 (to many sig figs on MR, it isn't not nearly that static)
0.649^2 * 850 = 358
0.96^2 * 10*56 = 516
0.73^2 * 12*56 = 358
With the weights of the 350z being so much closer to balanced, I'm surprised it runs that much front spring. Front N.F. are much higher than rear.
0.688^2 * 1000 = 473 (to many sig figs on MR, it isn't not nearly that static)
0.649^2 * 850 = 358
0.96^2 * 10*56 = 516
0.73^2 * 12*56 = 358
With the weights of the 350z being so much closer to balanced, I'm surprised it runs that much front spring. Front N.F. are much higher than rear.
plus the angle correction would influence it softer as well.
btw, your rear MR for the Evo is less than what we measured.. hrmm
0.73 vs 0.78
Hmm, I measured roughly 0.73 but that's not to say I didn't have an error. I do need to measure more accurately around the range my car sits at static, I think 0.73 was an average over the arc.
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
You coming to the Pro Dallas? Hope to see you there.
Doug
Heh, yeah 0.05 isn't an insignificant difference. But I wouldn't really worry too much about it since its just used to get you in the ball part anyways.
Yep, we'll be there. The car/trailer is actually still there (I hope!). We'll be up Friday afternoon sometime.
Yep, we'll be there. The car/trailer is actually still there (I hope!). We'll be up Friday afternoon sometime.
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
yup, I forgot to square the MR, so the (typical) EVO rates are actually quite a bit higher. ...but we also have a lot more weight over the front wheels.
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
350Z VS EVO comparison
TIRES: 285 -vs- 245 = between ~10%-15%, since they run huge wheels let's call it 15% more tire on the 350Z
POWER: 297/280 -vs- 304/292 = 2%/4% less HP/TQ for the 350Z (+12% dyno correction factor)
WEIGHT: 1735lbs~ -vs- 1980lbs = 245lbs or 12% less weight on the front of the 350Z
Evolved Member
Joined: Mar 2002
Posts: 1,760
Likes: 22
From: Reading, MA
Newbie
Joined: Jun 2011
Posts: 55
Likes: 0
From: MD
My head hurts from all this.
Realistically, an 03-04 is going to be in the 265-275 (275 is probably really high with the STU ruleset)whp range in STU trim. Weight should be around 3000.
That said, I've driven Willemin's STU IX and it out accelerates my BSP car IMO. I own a 350z and I am not drinking the coolaid it is the car in STU. I would still rather have a IX. C5 is the wildcard and the one you should be worried about.
Realistically, an 03-04 is going to be in the 265-275 (275 is probably really high with the STU ruleset)whp range in STU trim. Weight should be around 3000.
That said, I've driven Willemin's STU IX and it out accelerates my BSP car IMO. I own a 350z and I am not drinking the coolaid it is the car in STU. I would still rather have a IX. C5 is the wildcard and the one you should be worried about.
Evolving Member
Joined: Apr 2003
Posts: 441
Likes: 33
From: Seattle
My head hurts from all this.
Realistically, an 03-04 is going to be in the 265-275 (275 is probably really high with the STU ruleset)whp range in STU trim. Weight should be around 3000.
That said, I've driven Willemin's STU IX and it out accelerates my BSP car IMO. I own a 350z and I am not drinking the coolaid it is the car in STU. I would still rather have a IX. C5 is the wildcard and the one you should be worried about.
Realistically, an 03-04 is going to be in the 265-275 (275 is probably really high with the STU ruleset)whp range in STU trim. Weight should be around 3000.
That said, I've driven Willemin's STU IX and it out accelerates my BSP car IMO. I own a 350z and I am not drinking the coolaid it is the car in STU. I would still rather have a IX. C5 is the wildcard and the one you should be worried about.
good input
..fwiw, my car (in theory, since I've never been on a Dyno Dynamics) makes 268HP and 257TQ's (88% DynoJet)
I wonder what kind of dyno Matt the Canadian had his 368HP STU Corvette on...
Another Packwood NT win in the books! Very technical fun fast course. Peters would have got me here too, lots of big sweepers for him to own us 
Good meeting new STU competitors! Flawless, ASP should have bought you Trashcans all night for filling their class
Good meeting new STU competitors! Flawless, ASP should have bought you Trashcans all night for filling their class