thumping vibration on launch - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

TOMY · 10-17-2005, 08:23 PM

Hello everyone. I have come with another question. At take off in first gear, i get a thumping/looping/vibrating sound and goes away shortly after, say about after 10 mph. I also get heavy vibrating at about 40-50mph but I guess thats a tire balancing issue.

anyone have any ideas

Bryants95240sx · 10-17-2005, 09:10 PM

bumping coming from the rear? Its the subframe spacers if so.

theicecreamdan · 10-17-2005, 09:38 PM

check all the bolts on the driveshaft.

idlafie · 10-17-2005, 09:57 PM

Quote:

Originally Posted by Bryants95240sx

bumping coming from the rear? Its the subframe spacers if so.

Yep...Bryant's right...check your rear subframe spacers...this website will give you more info.
http://www.nissanperformancemag.com/june04/240sx/
ID

TOMY · 10-18-2005, 08:35 AM

Awesome, i will check those. Thanks for the tips guys.

TOMY · 10-18-2005, 08:43 AM

well after reading that article, it states that you may hear more vibrations and thumps. Well, i guess is better then the thumping at take off. I already get alot of road noise due to the gutted rear end anyway.

importnut · 10-18-2005, 12:09 PM

Could be your exhaust hitting the bottom of the car. Engine is torque-ing over more when you take off.

May cheap ass OBX header hits the bottom of my car, especially with my Nismo motor and trans mounts. The tranny sits higher because of that mount, making the header really close to the body.

Just a thought.

-Alex S.

10-17-2005, 08:23 PM	#1
TOMY BANNED Join Date: Mar 2003 Location: Chicago Posts: 237 Trader Rating: (0) Feedback Score: 0 reviews	thumping vibration on launch Hello everyone. I have come with another question. At take off in first gear, i get a thumping/looping/vibrating sound and goes away shortly after, say about after 10 mph. I also get heavy vibrating at about 40-50mph but I guess thats a tire balancing issue. anyone have any ideas

10-17-2005, 09:10 PM	#2
Bryants95240sx Zilvia Addict Join Date: Feb 2004 Location: alabama Age: 37 Posts: 668 Trader Rating: (0) Feedback Score: 0 reviews	bumping coming from the rear? Its the subframe spacers if so. __________________

10-18-2005, 12:09 PM	#7
importnut Leaky Injector Join Date: Jun 2002 Location: NW Indiana Age: 48 Posts: 111 Trader Rating: (0) Feedback Score: 0 reviews	Could be your exhaust hitting the bottom of the car. Engine is torque-ing over more when you take off. May cheap ass OBX header hits the bottom of my car, especially with my Nismo motor and trans mounts. The tranny sits higher because of that mount, making the header really close to the body. Just a thought. -Alex S. __________________ "What about the twinkie?"

10-18-2005, 08:35 AM	#5
TOMY BANNED Join Date: Mar 2003 Location: Chicago Posts: 237 Trader Rating: (0) Feedback Score: 0 reviews	Awesome, i will check those. Thanks for the tips guys.

10-18-2005, 08:43 AM	#6
TOMY BANNED Join Date: Mar 2003 Location: Chicago Posts: 237 Trader Rating: (0) Feedback Score: 0 reviews	well after reading that article, it states that you may hear more vibrations and thumps. Well, i guess is better then the thumping at take off. I already get alot of road noise due to the gutted rear end anyway.