Jrz rs pro for track

martin82 · 08-05-2013, 01:52 PM

Thanks for the inputs keep them coming LOL, I need to order ASAP. My whole suspension has been upgrade to SPL, all bushings and every possible SPL link etc.

I currently run whitelines front and rear but like Clint said, I will be playing with other sway bars etc.

Thanks again!

Dwnshift · 08-05-2013, 02:44 PM

Clintfocus: YES

But more so speaking on the rear

Sh0velMan · 08-05-2013, 03:03 PM

Just chiming in that the split seems very narrow and if I were going to drop JRZ money, I'd get corner weighted and do the math on what spring rates you should actually start with.

As far as rear area reinforcement.. here's what I did:

wstar · 08-05-2013, 03:18 PM

Well we're tracking off-topic a bit now, but... the ends on those bars at the shock towers, are they just welded plates onto the body near the tower top, or is there something deeper going on there? Not that I plan to do any of this myself, but I like to have some idea what I'm talking about when I find someone to do the work.

It's also interesting that your main hoop is just behind that stock low horizontal support part. I've seen pics with it just in front of that, or welded straight onto the top of it for a shorter hoop, but I hadn't ever considered putting it behind like that. Might leave more room for seat/harness mounting/adjustment, too.

clintfocus · 08-05-2013, 03:27 PM

Quote:

Originally Posted by Dwnshift

Clintfocus: YES

But more so speaking on the rear

so you'd say both, more front rate AND less rear.

I actually have a stiffer front bar in my garage i was going to let martin test on to see how he liked the setup (its inbetween the whiteline and the hotchkis in stiffness)

Again, the rear rate being "high" is in preperation for a large rear wing setup, and to go with a softer rear bar

Sh0velMan · 08-05-2013, 03:28 PM

Quote:

Originally Posted by wstar

Well we're tracking off-topic a bit now, but... the ends on those bars at the shock towers, are they just welded plates onto the body near the tower top, or is there something deeper going on there? Not that I plan to do any of this myself, but I like to have some idea what I'm talking about when I find someone to do the work.

It's also interesting that your main hoop is just behind that stock low horizontal support part. I've seen pics with it just in front of that, or welded straight onto the top of it for a shorter hoop, but I hadn't ever considered putting it behind like that. Might leave more room for seat/harness mounting/adjustment, too.

They're welded through the first layer into the second. There's some sealant between the two layers, we went through that.

The main hoop is in the same position on most of the cages I've seen, I think?

It's where it is on mine out necessity, my seat is within 3 inches of the hoop, as I've got it mounted pretty far back. Idea was to move my weight as far rearward as I could. I may end up needing to re-locate the pedals and wheel a bit rearward, but in the street driving I've done so far with the chair in the current position, it seems okay.

clintfocus · 08-05-2013, 03:42 PM

Btw guys, i think the rear tower reinforcement discussion is good and fine in this thread, since most race coilovers for the 370 go to traditional coilover design, the info is relavent

djtodd · 08-06-2013, 03:04 PM

BJ, does conti make you guys run a square setup?

sig11 · 08-06-2013, 07:56 PM

Quote:

Originally Posted by djtodd

BJ, does conti make you guys run a square setup?

They're 245/275 IIRC.

Dwnshift · 08-06-2013, 11:21 PM

245/275 Conti DoTs

ChrisSlicks · 08-07-2013, 08:20 AM

The conti's don't have the DOT stamp but they are the Hoosier R6 DOT compound, yet a few pounds lighter thanks to a thinner carcass.

martin82 · 08-07-2013, 02:25 PM

The JRZ's have been ordered should arrive in about 2 weeks and if everything goes well they will be tested at Auto Club Speedway on Sept 8th, then on the 14th for Redline Time Attack.

Rusty · 08-07-2013, 04:41 PM

In for details. I'm heading in this direction myself.

GSS138 · 08-09-2013, 12:11 PM

Hey Martin, I don't know if you have ridden in Len's 350, but I know he runs 15K springs up front on a Moton suspension-not sure what he runs in the rear. He is deployed somewhere in BFE right now but you might be able to facebook him. If you go with 15k's I hope you already have another car for DD or you are gonna break your *** driving through LA.

clintfocus · 08-09-2013, 03:36 PM

because of the wishbone suspension motion ratio, the effective spring rate is less then the springs actual rating, also the Z is has a significant amount of weight and grip potential up front so i think the springs in the low to mid teens kg wise isnt bad

08-05-2013, 03:18 PM	#19 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Well we're tracking off-topic a bit now, but... the ends on those bars at the shock towers, are they just welded plates onto the body near the tower top, or is there something deeper going on there? Not that I plan to do any of this myself, but I like to have some idea what I'm talking about when I find someone to do the work. It's also interesting that your main hoop is just behind that stock low horizontal support part. I've seen pics with it just in front of that, or welded straight onto the top of it for a shorter hoop, but I hadn't ever considered putting it behind like that. Might leave more room for seat/harness mounting/adjustment, too. __________________ 7AT Track Car! Journal thread / Car setup details

08-07-2013, 08:20 AM	#26 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	The conti's don't have the DOT stamp but they are the Hoosier R6 DOT compound, yet a few pounds lighter thanks to a thinner carcass. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

08-07-2013, 02:25 PM	#27 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 20	The JRZ's have been ordered should arrive in about 2 weeks and if everything goes well they will be tested at Auto Club Speedway on Sept 8th, then on the 14th for Redline Time Attack. threeseventy, DarkJak and Rusty like this.

08-07-2013, 04:41 PM	#28 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,244 Drives: 2011 Nismo GM 6M Rep Power: 2684438	In for details. I'm heading in this direction myself. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

08-09-2013, 12:11 PM	#29 (permalink)
GSS138 Track Member Join Date: Mar 2013 Location: Mission Viejo, CA Posts: 769 Drives: '12 370Z 6M Sport Rep Power: 13	Hey Martin, I don't know if you have ridden in Len's 350, but I know he runs 15K springs up front on a Moton suspension-not sure what he runs in the rear. He is deployed somewhere in BFE right now but you might be able to facebook him. If you go with 15k's I hope you already have another car for DD or you are gonna break your *** driving through LA. __________________ Current Mods: Vorpal Weapon +5.

08-05-2013, 01:52 PM	#16 (permalink)
martin82 A True Z Fanatic Join Date: Nov 2011 Location: los angeles Posts: 2,636 Drives: 12 Nissan 370Z MB M6 Rep Power: 20	Thanks for the inputs keep them coming LOL, I need to order ASAP. My whole suspension has been upgrade to SPL, all bushings and every possible SPL link etc. I currently run whitelines front and rear but like Clint said, I will be playing with other sway bars etc. Thanks again!

08-05-2013, 02:44 PM	#17 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	Clintfocus: YES But more so speaking on the rear

08-05-2013, 03:42 PM	#22 (permalink)
clintfocus Track Member Join Date: Jan 2011 Location: los angeles Age: 39 Posts: 933 Drives: 370z, EK Civic, F150 Rep Power: 15	Btw guys, i think the rear tower reinforcement discussion is good and fine in this thread, since most race coilovers for the 370 go to traditional coilover design, the info is relavent

08-06-2013, 03:04 PM	#23 (permalink)
djtodd Track Member Join Date: Jun 2012 Location: Lexington, SC Posts: 932 Drives: 2012 Nismo TT Rep Power: 3398	BJ, does conti make you guys run a square setup?

08-06-2013, 11:21 PM	#25 (permalink)
Dwnshift Track Member Join Date: Feb 2012 Location: Cincy Posts: 717 Drives: NISMO 370Z RC Rep Power: 14	245/275 Conti DoTs

08-09-2013, 03:36 PM	#30 (permalink)
clintfocus Track Member Join Date: Jan 2011 Location: los angeles Age: 39 Posts: 933 Drives: 370z, EK Civic, F150 Rep Power: 15	because of the wishbone suspension motion ratio, the effective spring rate is less then the springs actual rating, also the Z is has a significant amount of weight and grip potential up front so i think the springs in the low to mid teens kg wise isnt bad

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
2013 Road Atlanta Track Dates - MVP Track Time	Feffman	South East Region	3	10-05-2013 09:22 AM
2012 Midwest Track Schedule - MVP Track Time	Feffman	Mid Western Region	2	06-17-2012 09:16 AM
$110 Track day at Willow Springs- Big Track -March24 in SoCal	Extremespeed	Track / Autocross / Drifting / Dragstrip	4	03-15-2012 08:27 PM
$110 Track day at Willow Springs- Big Track -March24 in SoCal	Extremespeed	Southern California Region	6	03-07-2012 01:28 AM
United touge/track drivers Streets of Willow Track Day	K.R.O.P.S.	Southern California Region	0	10-05-2011 08:25 PM