Swirly rear end at 120+ mph

thekinn · 02-23-2013, 12:13 PM

Quote:

Originally Posted by RICAN

Ok so my rear end gets real swirly when ever I got over 120 and start applying brakes

If the road surface is uneven (crowning) or you are turning even the slightest bit - the reason is that there is weight transfer from the rear to the front tires during braking. The rear end is lightening up when you begin to apply the brakes... so naturally, it will get light and 'swirly'..

Other factors might hurt or help the situation.. alignment, tires, tire wear, suspension, brake pads..etc.. but definitely keep your weight transfer in mind.

RICAN · 02-23-2013, 06:20 PM

Ok so I install the camber kit that was in the back of the car when I got it!!...i just drop it off to get a alligment on all the tires ...il give more update later when I get the car back !!..

IMWEZL · 02-23-2013, 07:53 PM

Oye Loco Stay safe...the roads around Hood aren't the best. Also, don't overlook anything small, PMCS your ride, check the brakes, pads, and tire wear.

RICAN · 02-23-2013, 08:06 PM

Well I just got the car back!!..and it fix it was alignment!...

RICAN · 02-23-2013, 08:11 PM

Quote:

Originally Posted by IMWEZL

Oye Loco Stay safe...the roads around Hood aren't the best. Also, don't overlook anything small, PMCS your ride, check the brakes, pads, and tire wear.

Lol...are you from around here?...I'm a mechanic but I never owe a rear wheel drive car !!i had a caliber srt4 with 390 whp!...it was fwd and I had no traction at all...I couldn't even do a 65 mph pull with out loosing traction!!....that's why I decided to get the Z...I'm getting it right before I leave to Afghanistan!!..and when I get back I'm boosting it

Japanjay · 02-23-2013, 10:19 PM

Get it when you get back so it isnt in storage for so long. Z's are not going to disappear any time soon.

ImportConvert · 02-24-2013, 10:42 AM

These cars do not have the best weight distribution. I have weighed mine, and static is about 54/46. With a driver and fuel, that shifts to 55/45. Apply the brakes hard, and yeah, it's going to feel floaty in the back.

SS_Firehawk · 02-24-2013, 11:04 AM

Weight distro isn't bad on the car. Driver sits at the axis point of the vehicle and the gas tank is right in the middle of the car, so regardless if it's full or empty, weight distribution doesn't change.

Huck · 02-24-2013, 11:07 AM

I know what the problem is. You're using way too many exclamation points. You sound like you're freaking out, and it's freaking your Z out. It's basically like spooking a horse, she's really nervous right now and is considering throwing you. You need to relax, talk calmly to her, and give her a good wash. Then try again.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!

Sent from my iPizzle using magic and new-fangled science stuff

IMWEZL · 02-24-2013, 07:45 PM

Quote:

Originally Posted by RICAN

Lol...are you from around here?...I'm a mechanic but I never owe a rear wheel drive car !!i had a caliber srt4 with 390 whp!...it was fwd and I had no traction at all...I couldn't even do a 65 mph pull with out loosing traction!!....that's why I decided to get the Z...I'm getting it right before I leave to Afghanistan!!..and when I get back I'm boosting it

My parents live in the area. Hood my be my next duty station. I had a 400+ whp Neon SRT4 and the back end would get way more squirley than the Z. There's hardly any weight on the back of those. Never had an issue though aside from the torque steer.

cossie1600 · 02-24-2013, 08:08 PM

Car has freaking ABS and EBD, it shouldn't get sideways unless you f things up

spearfish25 · 03-08-2013, 11:05 PM

The only time I've noticed this on my car is if I've unsettled it prior to heavy breaking or if I'm not breaking in a straight line at the start of braking.

djtodd · 03-09-2013, 12:25 AM

Quote:

Originally Posted by spearfish25

The only time I've noticed this on my car is if I've unsettled it prior to heavy breaking or if I'm not breaking in a straight line at the start of braking.

But thats never a problem for me in Need for Speed?!

RICAN · 03-09-2013, 03:01 AM

Lol...I forgot to update you guys ...sorry for that!.....I already fix the problem...after installing the camber kits all around .. I took it to get a alignment and since the I haven't got any problem.thank you for all your inputs

gSwift · 03-11-2013, 01:05 AM

Quote:

Originally Posted by RICAN

Lol...I forgot to update you guys ...sorry for that!.....I already fix the problem...after installing the camber kits all around .. I took it to get a alignment and since the I haven't got any problem.thank you for all your inputs

Glad you got it fixed, but you should still consider a few brake upgrades. Pads, SS lines and a good quality brake fluid at the very minimum. You'll feel quite a difference.

02-24-2013, 11:04 AM	#23 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	Weight distro isn't bad on the car. Driver sits at the axis point of the vehicle and the gas tank is right in the middle of the car, so regardless if it's full or empty, weight distribution doesn't change. __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

02-24-2013, 11:07 AM	#24 (permalink)
Huck A True Z Fanatic Join Date: Jan 2012 Location: Cocoa, Florida Age: 42 Posts: 5,075 Drives: Pantydropper machine Rep Power: 33	I know what the problem is. You're using way too many exclamation points. You sound like you're freaking out, and it's freaking your Z out. It's basically like spooking a horse, she's really nervous right now and is considering throwing you. You need to relax, talk calmly to her, and give her a good wash. Then try again. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!! Sent from my iPizzle using magic and new-fangled science stuff Ron likes this. __________________ VLEDS \| Evo-R \| Moddiction \| CF Hood Struts \| F.I. CF CBE & LTH \| Stillen CAI \| NST Pulleys \| UpRev \| Z1 \| M7 \| Status \| Forgestar \| PSS \| Whiteline \| SPL \| SPC \| Kenwood \| Zenclosure \| Kicker \| Alpine Type R

03-08-2013, 11:05 PM	#27 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	The only time I've noticed this on my car is if I've unsettled it prior to heavy breaking or if I'm not breaking in a straight line at the start of braking. __________________ 2013 Cadillac V-Wagon, RIP Z

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02-23-2013, 06:20 PM	#17 (permalink)
RICAN Enthusiast Member Join Date: Jan 2013 Location: fort hood, tx Posts: 345 Drives: 2012 370z m6 Rep Power: 12	Ok so I install the camber kit that was in the back of the car when I got it!!...i just drop it off to get a alligment on all the tires ...il give more update later when I get the car back !!..

02-23-2013, 07:53 PM	#18 (permalink)
IMWEZL Track Member Join Date: Apr 2009 Location: HNL Posts: 603 Drives: 370Z/MKVII GTI Rep Power: 17	Oye Loco Stay safe...the roads around Hood aren't the best. Also, don't overlook anything small, PMCS your ride, check the brakes, pads, and tire wear.

02-23-2013, 08:06 PM	#19 (permalink)
RICAN Enthusiast Member Join Date: Jan 2013 Location: fort hood, tx Posts: 345 Drives: 2012 370z m6 Rep Power: 12	Well I just got the car back!!..and it fix it was alignment!...

02-23-2013, 10:19 PM	#21 (permalink)
Japanjay Track Member Join Date: Mar 2012 Location: Puyallup Posts: 856 Drives: 09 Nissan 370z MB M6 Rep Power: 14	Get it when you get back so it isnt in storage for so long. Z's are not going to disappear any time soon.

02-24-2013, 10:42 AM	#22 (permalink)
ImportConvert A True Z Fanatic Join Date: Jun 2010 Location: SWMO Posts: 4,454 Drives: 2019 CX5 GT Reserve Rep Power: 7627	These cars do not have the best weight distribution. I have weighed mine, and static is about 54/46. With a driver and fuel, that shifts to 55/45. Apply the brakes hard, and yeah, it's going to feel floaty in the back.

02-24-2013, 08:08 PM	#26 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Car has freaking ABS and EBD, it shouldn't get sideways unless you f things up

03-09-2013, 03:01 AM	#29 (permalink)
RICAN Enthusiast Member Join Date: Jan 2013 Location: fort hood, tx Posts: 345 Drives: 2012 370z m6 Rep Power: 12	Lol...I forgot to update you guys ...sorry for that!.....I already fix the problem...after installing the camber kits all around .. I took it to get a alignment and since the I haven't got any problem.thank you for all your inputs