Yeesh that’s beefy

I’ll be calling bc tomorrow and fortune auto

Gonna weigh out some options, liking the er series and 510’s are also looking good

I think I’m going to go with the 16/14 combo but my mind changes back and forth. Main concern is I don’t want to induce understeer, and have a hotchkis up front

Inducing too much understeer isn't too easy to do. I run 1000lb/800lb (not exactly 18k/14k but close), and I have Hotchkis front and rear. I run my rear bar on the softest setting and the rear shocks cranked pretty far down (autocross setup). Even then there is plenty of room for oversteer left.

FWIW, I had Fortune Auto 510s on my last Z, and was quite satisfied for the price. The current owner just sent the dampers in for their first service, 5 years in, at a cost of $300.
On that car I ran only about 60% of the spring rates that I do now, but FA should be able to set it up however you like.

ah gotcha, thank you for that info. I misunderstood that going too stiff in the front can cause understeer.

still in between bc's and fortune autos

alrighty boys

ordered the fortune auto's. 510 16k front/14k rear hyperco springs, aluminum dampers and heim joint upgrade. now i wait !!

hit up cygnus auto if you need anything, geoff is great

Technically speaking, too stiff in the front relative to the rear does induce undertsteer. My point is just that these cars rotate pretty happily, so that shouldn't be a major concern when deciding between differences in springrates, as long as you're in a reasonable range. 16k/18k fronts would need a really really low rear number to be problematic in that sense beyond what you can just fix with shock adjustments, and you can always change spring rates later.

gotcha, good to know!

should i be worried that the aluminum dampers wouldnt be as durable as the steel ones? i understand our cars are double wish bone so there isnt that much stress on the shock anyways, is that correct?

The coilovers are not load bearing per say. Just have the springs on them. Just make sure the double nuts on the bottom of the springs are tight.

I won’t be installing, I’ll have the shop install them. Making sure the double nuts on the bottom are tight don’t have anything to do with the dampers being aluminum right?

Well the tubes are threaded for the spring adjustment. If the lock nut is tight. You don't have anything to worry about. You will have more than enough threads for contact for the load.

That is right. What I’m asking is the aluminum as durable as the steel in terms of bending?

also even if I got the steel dampers I would have to make sure the double nut at the bottom is tight right?

i have the choice to switch still

Probably not but not in any way that would be appreciable. The main reason other dampers are made of steel is for cost.

You're not going to bend them. They're not a MacPherson strut, which is load bearing.

Not really. My 3" custom valved King shocks on my Power Wagon are steel. I picked steel over aluminum for strength. The remote reservoirs are aluminum on them. Those shocks are over $5,000 for 4.

lol so why is it not applicable on the 370z? is it because of the way our suspension is set up?