Need help eliminating oversteer

robertkroll · 08-04-2018, 05:39 AM

Quote:

Originally Posted by Hotrodz

Copy that, my setup is somewhat close to yours. I have pretty much the same suspension up grades except for one way coilovers 14k front and 11k rear. I run no bar in the back as well. I run square but not on slicks, nt01's 315 30. I am lowered as well and have just a slight oversteer.

I mentioned this in another thread but in talking with a Nissan employee while looking at some Nissan race cars in their heritage collection he said you might want add some weight over your axles. He went on to say that every z back in the day had added weight in the rear. He the showed me a few cars with post over the rear tire well were they added the weight help the car with traction.

Sent from my SM-G965U using Tapatalk

I certainly don't want to add weight to the car. It's hard enough to be competitive against E46's. The car does perform differently on a full tank of fuel. Since we put the large cell into the car for endurance events, but you can't count on that because it is a dynamic change to the car. We custom built the cell to replace the stock tank and keep the fuel as low as possible.

Did I read correctly that you are running 315's square? WOW, that's a LOT of tire. The front bite is so good on the car, that we can't induce any slip on the 275 fronts, so the added weight just wasn't worth it to us. I notice that you also have VERY heavy springs. Did you do that to prevent squat and loss of camber through the suspension travel?

Hotrodz · 08-04-2018, 12:43 PM

Quote:

Originally Posted by robertkroll

I certainly don't want to add weight to the car. It's hard enough to be competitive against E46's. The car does perform differently on a full tank of fuel. Since we put the large cell into the car for endurance events, but you can't count on that because it is a dynamic change to the car. We custom built the cell to replace the stock tank and keep the fuel as low as possible.

Did I read correctly that you are running 315's square? WOW, that's a LOT of tire. The front bite is so good on the car, that we can't induce any slip on the 275 fronts, so the added weight just wasn't worth it to us. I notice that you also have VERY heavy springs. Did you do that to prevent squat and loss of camber through the suspension travel?

I totally understand not wanting to add anymore weight being NA. When I have suggested this to others whether road or drag goers, the answer is the as yours...the car does hook better with a full tank of gas but is slower.

I run two sets of wheels one that is 18x11 +18 square with 315 30 tires and 18x10.5 +30 square with 295 30 on them. I am boosted so weight balance and grip is what I continue to push for. The nt01 in 315 are actually really good up front. Turn is good with an equally good initial bit and grip consistent through the turn in and exit. The r888 295 are good for about a session and half before they become greasy and do not hold their grip.

I just had my coilovers serviced and upgraded by Fortune Auto and they recommended that for my car setup to go with the heavy springs all around. I think you logic is spot for the reason why some companies recommend heavy spring rates. Not all do and some have more spring to rear than front. I believe HKS is that way.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Eliminating un-necessary expenditures, starting with cable bill! HD Antenna Q?	newls196	The Lounge (Off Topic)	9	12-04-2016 04:39 PM
Oversteer in right hand turns	JWillis72	Brakes & Suspension	57	04-03-2014 08:59 AM
Having Roll Cage and eliminating some Rear Suspension components	SPOHN	Track / Autocross / Drifting / Dragstrip	31	02-12-2014 12:00 PM
Oversteer!	Garrett63	Nissan 370Z General Discussions	3	02-28-2013 05:50 PM
Oversteer in 2010, 370Z, Roadster	roopjt	Wheels & Tires	5	09-13-2012 02:20 PM