Ritchy Watanabe welding

Project Nissan Sentra Spec-V part 4: Installing Sway Bars

By Mike Kojima

Follow Project Spec-V Here!

Part of any good handling package includes the antisway bars or swaybars for short. Swaybars help resist body roll and keep the car flat in corners. For racing, adjustable swaybars are important because adjusting the stiffness of the front or rear bars helps adjust the amount of under or oversteer a car will exhibit under hard cornering. Adjustable bars are critical as they can be adjusted at the track much faster than changing springs or other ways of altering roll stiffness to change the understeer to oversteer ratio when tuning the suspension to suit the situation.

speedway engineering sway bar

For a rear bar we used this racing sway bar from Speedway Engineering. This is a real racing part and requires finish fabrication to install it on a car.

When we started our project, we knew that swaybars would be a problem as the choices for the Spec-V are very limited and the only adjustable bar was a simple bolt on one from Progress in the rear. With no other choices we were forced to draw on our racing experience and adapt various parts from stock car racing and other sources.

speedway engineering swaybar arm

Ritchy Watanabe did a great job modifying our chassis to use this bar. Ritchie drilled the arms for multi adjustment points so we could quickly and easily vary the bars stiffness between sessions at the track.



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Wednesday, December 16, 2009 2:38 AM
Roll Center Adapter?
Miles (San Antonio)
Miles (San Antonio)link
Wednesday, December 16, 2009 6:21 AM
Wow. That is an insane amount of work for sway bars but necessary for the adjustability and results your are looking for. My hats off to all those guys.

Some amazing work.
Wednesday, December 16, 2009 6:17 PM
Absolutely Dido!
Saturday, December 19, 2009 9:55 PM
I remember following your Sentra-project on the NITTO blog few years ago. Great car/ work Mike ! Hats off to Technosquare for the impeccable job.
Sunday, December 20, 2009 8:24 AM
I know that front swaybar is a pain. Hardly any room to pull out the stock one, let alone a thicker one. Nice work! Glad to finally see a Spec V build, they don't get the credit they deserve.
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