I'm looking into BSP in SOLO, I'd like to pick up a set of coilovers for it. I've heard limited info on BC Racing's BR series through searches. Opinions? I really don't have $3k to drop on a set of coilovers which is why I sought out another option.

 

What is your price range? I'd rather have sleeved koni yellows with something like 500/450 spring rates than BC's.

 

Although I have nothing against the BC BR's, I agree with the above. Most of the $1000 coilovers out there (Ksport, Megan, BC, etc.) are not going to give you the kind of gain that you would get from the Koni Yellows with a good spring setup.

I have run the BC ER's (double adjustable) on another car and loved them but they are a bit more expensive.

 

Thanks for the fast replies!! Exactly what I was looking for!

 

$3k limit, i would not get BC's. Probably KW clubsports or others.

 

Fortune auto coilovers...

 

ive ridden on stance, KW's, custom Koni's setup, and have hks hipermax iii's non-sport, and personally the koni set up was best.

KW V3 and HKS hipermax's are a close call but I like my hipermax's more.

also, i've heard nothing but good things about bilstein's

 

The Koni's were that great?
Nice.
I do often hear that custom Koni setups are 'better'.

 

Anyone have experience with the fortune auto coilovers (as compared to others)? They offer Swift springs upgrades and shock dyno plots...

 

And what would you do with the shock dyno plot? What kind of force/velocity numbers are you looking for?

 

Honestly, I just took that as a sign that they were serious about their shocks.

 

i have the cusco zero-2's and they r frickin amazing....lil bit out of your price range but maybe find a used set??

 

The truth is, very few people even half understand them. Personally, I barely grasp the idea of the various plots (mostly football, F/V, F/V with hysteresis secondary plots) and spent hours reading up and comparing baseline plots from stock cars I've been in.

Beta, what have you found as a good figure on track in the 2 ips range? 150-180lb? Also, which is your preference in actual curves? Digressive or linear? (For a 140'ish treadwear tire)

I post this plot from the Fortune Auto only for a visual reference and the fact they were mentioned. (Note these shocks really seem to have issues in the low speed area)

 

If I could do it over again I would just get Koni DAs + Nissan Motorsports T2 Springs. Truechoice if you have to have ride height adjustability but then you must do bushings. Kinetix A-arms front and whatever arms plus toe bolts for rear. LSD first though.

 

the man speaks the truth

 

1. what other mods are done to the car?
2. what tires are being run?
3. what LSD are you using?

gotta answer these before a good discussion on coilovers/suspension for track use can really be discussed

 

OK, I haven't done anything for the 350Z. Most of my work is with strut equipped cars, but here goes...

A current 140 treadwear tire is comparably to a Kumho V700, Hoosier A1, etc. from a few years ago. Maybe even better. You'll want digressive valving for those tires and a somewhat low knee point to keep from overloading the tires (assuming a 3,000lb. 350Z). I'm thinking the rebound knee point needs to be between .033 and .066 meters per second. A second knee point at .132 and .150 mps would be nice but also expensive. A adjustment range from 250 to 500 newtons on the low end to 1250 to 2350 on the high end (.334 mps) is probably good.

Compression would have a low end knee point again between .033 and .o66 mps and a high end knee point at .132 mps. Force would range from 100 to 400 newtons on the low end and 500 to 1,500 newtons on the high end (.334 mps).

All the above is a guess on my part and may be way off. Again, most of my experience is with strut equipped cars with a .9 wheel rates so the valving might be too high.

 

She's definately a slow build in progress. Current diff is stock vlsd, tires are kdw 275-35-18 f and 295-35-18 R. Running Eibach sways, SPC camber kit and Espelir springs. Other then that, it's a stock suspension, I'm trying to stay within SP solo rules. I'll be in the market for coilovers and a diff in the off season, so I'm trying to gain info now. I'm looking into tires as well, only heard good things about Hoosiers.
Biggest problem is everyone has a different opinion on what's the best for the car, etc. Since I'm limited on experience in most of these areas, it's a lot of reading.

 

this is what I suggest, in this order

1. upgrade your tires
2. upgrade your diff
3. worry about coilovers after 1 and 2 are completed, taking into consideration how much time the car will spend on the track vs the street

there is no such thing as a best tire - instead there are several excellent choices. The only way to find out what suits your driving style best is to try different setups, and play with each one (alignment, tire pressures), taking notes to figure out which gets along with you as a driver the best

 

Thanks for the input, I was thinking of a similar looking curve (+ a little dampening and rebound and only a single knee) but not using the key factor you spoke about, overloading the tires. And yes that would be a nice but pricey setup.

I'm not an autocross guy but depending on your tires, class, and level of commitment I'd think you could use something as basic as a set of custom valved Koni's (for the Hoosiers) with a pretty aggressive spring. Also, I'd imagine you could go with an off the shelf setup for the more street tire baised setup. The Zeals should be fine for the good grip street tire setup, as well they probably offer custom valving for more aggressive tire choices. But I'm thinking the others are probably gonna mention that stock VLSD might be a limiting factor on a autocross course.