Hi all -

I have a 2011 g37x sedan awd and have added in the bigger rear white line away bar which was great.

in the spring I will need new non winter tires and am going with Michelin Pilot Sport All Season 4 (currently running ice in Minneapolis).

I am not too concerned about drop and know the biggest bang for the buck will be from tires so wanted to see how much an improvement the swift springs make. I’d like a sportier ride but if it’s just ok I’ll save the money for high flow cars.

thoughts?

 

Swaybars, three-season tires and good shocks will be your best and easiest mods for handing improvements on this car, more so than lowering springs (IMO). After that, there's various bracing considerations and solid bushings at the engine and rear diff, but gains become increasingly incremental at that point.

So if you're not obsessing over the ride height, then by all means prioritize a set of high flow cats on your mod list.

 

Cool. Thanks so much for the fast response!

 

I have swift springs ride is still very good IMO.

Lower center of gravity and slightly stiffer will help handling, less pitch and body roll.

Also lowering the car reduces the amount of airflow under the vehicle which helps with aerodynamics at higher speeds providing more downforce with no significant impact to drag, this provides high speed stability.

all my builds i always do a modest lowering spring, FUCA, rear camber/toe arm/bolts, custom alignment, rear anti-sway bar and front strut bar. Greatly improves handling and high speed stability with little downside.

Then you got to look at aero if you want to further increase handling and/or high speed stability. Front lip, side skirt, diffuser, spoiler/wing, custom flat bottom panels, canards, and rear apron spats.
Aero isn’t even noticeable/beneficial until at least 60mph, but by 100mph+ makes a huge difference, as speed doubles drag/aero effects quadruple.

 

Do you have any thoughts on air management systems that seem to modulate the air bags as you drive?