Wow that's pretty good haha. I put about 10k or so on mine throughout these issues. I've gone to the track once or twice on them and it handles so much better than stock but I do wish I went for something else since this seems like it will be a consistent issue. Do you track yours?

 

Yes, mine have been to the track about... 8 times? since I've gotten them. Laguna Seca, Thunderhill, Buttonwillow and Autoclub Speedway. Honestly I believe it's just the luck of the draw. It might be the fact that the KWV3s aren't actually designed for the G37 - they're made the for the 370Z. That means the valving, spring rates and ride heights are set for the slightly different weight/weight distribution of the 370Z. You'd think they don't make that much of a difference, but maybe they do.

 

All coil-overs for the RWD models are designed for the 370Z. That the G is merely a long-wheelbase Z is fortunate for us.

 

Wow! Mine has only seen streets of willow but I have been hoping to branch out after I get this suspension crap handled. I definitely thought about the design and issues that might come from it (I thought weight would be a big factor) until I looked up problems with these coils and found that people were having similar issues to me on both B<W and s2k forums. One guy even said something along the lines of "this is how KW suspension is, so you better get used to yanking them off every 1-2 years for a rebuild"

 

That's... kinda of insane. You would think paying that much for a part would ensure some sort of quality control, or at least minimal maintenance.

 

Hey bP. Since you track your car so often I have a question for you that can't seem to be answered on any g37 forum. I'm running the stock enkei 2011+ coupe wheels and am running the 245/275 staggered setup on some v12 evos. I was told I was stupid for putting such wide tires on the car even though a lot of people run these widths. My question is: I know for looks and daily driving these widths are fine but don't know how they perform at the track since the tire is under much more stress, do you think running the same widths again with the intention of continuing to track the car is fine or would thinner tires be better? Thanks!

 

I haven't run it in that size. I did run those on the street, and it felt mushy to me, as 275s on a 9inch wheel will bulge a bit (with those exact tires).

Tire sizing (front to rear, especially) is personal preference - I wanted less understeer so I run 275 square on 18 inch wheels as they are a bit cheaper. Again, most of this is personal preference, which you'll come to learn as you get more driving time in. The stock 225/245 set up will work fine, even with the V12 Evos you have on there.

If you're new to the track, just change the brakes/brake fluid to something with higher heat tolerance and go. There's no harm in learning to drive your car as it is, then make changes as you learn and get faster. If you have any more questions feel free to PM me, we can continue the conversation there.

 

I have the coupe wheels with 245/275 stagger and have run eight track events with 'em. The G is fairly heavy and you almost can't have too much tire. You don't really notice the slightly soft sidewalls. Transient response would be slightly better with stock coupe tire widths, but once the car is turning the softer sidewalls on the wider tires are no longer an issue but the increased traction is noticeable. The only downside to the stagger is you can't rotate. I run -2° camber front and rear and this helps with wear and grip.