WARNING! Cobb tunning springs Design flaw - Nissan 350Z Forum, Nissan 370Z Tech Forums
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post #1 of 21 (permalink) Old 03-10-2009, 11:42 PM Thread Starter
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I will update this thread VERY soon with pictures.

Cobb Tunning springs do NOT fit on the front strut perch....in fact half the spring hangs off the strut perch is is so big.

WHY...because the spring is the same diameter from TOP to bottom.

Here is the SCARY PART! i took measurements over the phone and compared them with Shayne from Cobb and he has the same measurements....in fact he just sent me pictures on my cell phone and they look IDENTICAL to mine!!!!!!!

DO NOT BUY THESE SPRINGS! i don't know who made them but i can tell you these were NOT R&D'd.....if they were they would have at least fit correctly!,

the spring is so loose on the bottom that i bet if you hit a pothole you would bend the strut rod. Z!o:

I don't know how i am going to get my money back from the eBay seller.

i have wasted 500 bucks on two sets of springs.....the other set is Tanabe GF210's....they were WAY to soft and PROGRESSIVE and sucked....but at least i didn't have fitment issues with them!

i know this thread is worthless without pictures but i am at work and don't get off until 10pm....then it takes me 45 min. to get home and i have to be up at 5am.....i will post EVERYTHING tomorrow after i get off work....

including MY pictures and the one's Shane from Cobb sent me.....

PLEASE do not buy these springs.

i read a few people on this forum claim they have no issues, but they PAID someone else to install them!!!!!!! so they did NOT see it first hand.

at the very least for starters i will provide this link that describes my problem exactly.

http://my350z.com/forum/brakes-and-suspens...rings-help.html

on another note....can anyone recommend a good set of linear springs? i am looking at the RS-R, and Swift sport as last alternatives.....adjustable struts are out of the question as i already have 2 week old Tokico blues.

Thanks!

Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #2 of 21 (permalink) Old 03-11-2009, 12:48 AM
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Did you think that maybe the springs are counterfeits? There have been a lot of fake Tein springs out there on eBay. This might be the same issue. I would verify before we bash Cobb Tuning.

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post #3 of 21 (permalink) Old 03-11-2009, 02:08 AM Thread Starter
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Impossible... I sent him pictures and he said that they ARE Cobb springs for sure.

here is the e-mail i got

Daniel,

Attached are some images of our springs with a tape measure for size reference.

As you can see by the pictures, the springs are a consistent diameter throughout and are about 5" outer diameter on top and bottom. They are about 1' even in length.

Shayne Covey
[email protected]
Tech Support/Sales
COBB Tuning
"The future belongs to those of us still willing to get our hands dirty."

here are His pictures that were attached to this e-mail
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Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #4 of 21 (permalink) Old 03-11-2009, 02:21 AM Thread Starter
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OK and here is the picture that i sent him.

note the comparison of the stock spring VS the Cobb spring

Z!o: Z!o: Z!o: Z!o:

OHH crap...i just looked at the picture and ran outside to get the springs....he sent me a picture of the rear springs and NOT the fronts to compare......i am e-mailing him tomorrow (actually right now) and tell him he sent pictures of the rear spring....
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Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #5 of 21 (permalink) Old 03-11-2009, 02:30 AM Thread Starter
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QUOTE (IDrm350 @ Mar 10 2009, 07:48 PM)
Quote:
Did you think that maybe the springs are counterfeits? There have been a lot of fake Tein springs out there on eBay. This might be the same issue. I would verify before we bash Cobb Tuning.
I am.....with the economy so bad i really dont want to put people out of business.

i am sending him the pictures again to compare and see what he says....

you know at least eBay protects the buyer.

Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #6 of 21 (permalink) Old 03-11-2009, 06:00 AM
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keep us updated on this

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post #7 of 21 (permalink) Old 03-12-2009, 10:09 PM Thread Starter
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I am very frustrated today.

The person i was dealing with "Shayne" is out for the week...........................................

I have been dealing with "Chris" and was VERY CLEAR about Shayne sending me the wrong pictures. he sent me pictures of the rear springs and NOT the front, and what does Chris do.....he sends me pictures of the REAR AGAIN ARRRGGGHH! Z!o:

Tomorrow will be exactly a week since i called dealing with this problem....I was supposed to have these pictures yesterday....and they forgot.....




STILL WAITING on front spring pictures.........

Is is common practice for customers to receive support like this? are they trying to avoid the front spring issue all together?

If they send me another rear picture i am going to PUKE!

These guys are either very stupid, or very smart in being evasive.

Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #8 of 21 (permalink) Old 03-13-2009, 12:00 AM
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one of the perils of buying from ebay and not Cobb directly or a Cobb dealer

I have Swift and love them.

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post #9 of 21 (permalink) Old 03-13-2009, 12:30 AM Thread Starter
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QUOTE (westpak @ Mar 12 2009, 07:00 PM)
Quote:
one of the perils of buying from ebay and not Cobb directly or a Cobb dealer

I have Swift and love them.
The only reason I choose eBay is from the buyer protection...which I just might use....SIGH

Honestly I canít really complain too badly because I did the installation myself.

Westpak

I AM DESPERATE to get some decent springs, but here is my main concern. Most people claim that they get better handling on the Z usually have the 03-04.5 model.....do you happen to have the an 05+ with the updated rear springs, because there are 2 versions of the Swift springs...the regular linear version and the "R" spring which is progressive.

The standard springs (linear) have a softer spring rate than stock, but I have no idea what the butt dyno says....The R springs are progressive and start out softer than stock, but when stiffened up have aggressive spring rates.

What I am looking for is stiffer/tighter feeling in the steering wheel and confidence in the suspension. I really don't like the feeling of progressive and have a BAD taste in my mouth from the tanabe GF210's in my garage....shoulda named them the HF )Horrible Feeling springs!)

I need to know what you are using for struts, what sway bars are you using and if you are using the typical 245/75 19 inch wheel setup.......

Me...I have brand new tokico blues......and urethane sway bar bushings. I have 19inch rims sitting here in my den waiting for tires, on hold until the spring problem is resolved. Seriously I have 2 choices left in springs before I REALLY have to abandon ship and save for coilovers, but I do feel there is hope for me because there MUST be a spring out there that will do the job.

Please.....when you installed your springs....what suspension components were already on your car? please describe your feelings over stock.

i am still BAFFLED about how many people say tanabe makes their carr feel like it's on rails (they are liars)

Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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post #10 of 21 (permalink) Old 03-13-2009, 12:36 AM Thread Starter
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QUOTE (westpak @ Mar 12 2009, 07:00 PM)
Quote:
one of the perils of buying from ebay and not Cobb directly or a Cobb dealer

I have Swift and love them.

Westpak

just thought i would like you to know that your florida 350z forum has a virus embeded in it....i was trying to join to check out what you have done to the car but AVG keeps telling me that it found a virus in my temporary internet files and says it is from that website.....you might want to report it.

it's possible that whoever was working on the website had a virus on their PC when they uploaded it...

installing AVG and scanning it should fix it.

being a network administrator i cannot find anything better than AVG so far and it's free.

just trying to be helpful
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Varis duct, K&N drop in , Motordyne 5/16 plenum spacer, Megan Headers, Megan Y pipe, Stock H.I.D. conversion, Topspeed A-arms w/adjustable camber, BC Racing Coilovers, Hotchkis sways (front stiffest rear middle). Stern Beast ST1 19 inch staggered wheels , Falken FK-452 Rubber. Whiteline urethane bushings
Next temporary mod is resonated test pipes with the stock y-pipe.
Next year Stillen supercharger stage 2 kit---order stage 3 pulley separately.
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