First drive with powertrix coilover

Rusty

Adjustable coil-overs take time to set-up to your liking. With what you said about getting air time. Sounds like you need to stiffen the rebound. Put all your settings in the middle of adjustable and start from there. Another thing. You street settings should be/ will be different from your track settings.

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littlejuanito

Does having the shocks on stiffer settings tame the going airborne on freeway dips?

Would it be fair to say that the reason OP is flying off the seat like he's riding on a heavy duty truck wth the bed unloaded, is cause he has the shocks on soft?

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Jhill

Believe me I understand suspension tuning doesn't happen overnight, I do off road with 6 way adjustable suspension (air spring rate, air spring progressive curve, low speed compression, high speed compression, low speed rebound and high speed rebound. But all damper adjustments revolve around spring rate first. If the spring rate is wrong there is really only so much you can do (not saying his rate is wrong for everyone it just may be too firm for what I wanted). The rs-r run 8k/8k so essentially stock but a higher performance (better frequency response, faster reaction time and less hysteresis than a low pressure twin tube) adjustable monotube damper which may be all I need. Again I can't stress enough I do not mean to slam his product for how firm the rates are they are smoother than oem over ripple bumps so that is saying something, it just may not be for me is all.

Jhill

This may very well be the case since the soft/firm is actually referring to rebound damping so yes it may be. So I will try to firm it up a bit and retest before I condemn it. It for me. Downside is the more rebound then the more the suspension packs up of over ripple bumps and then I lose the whole thing I like about them over oem. If I could adjust just the high speed rebound and not the low speed then I could leave the low speed faster for the stutters and firm the high speed for the g out returns.

Spooler

Like I said, call Charles and have a conversation with him about it. You have coilovers, you can change the springs with no shock adjustment if the shocks can handle it. He can help you set them up to your liking.

Jhill

I did before I ordered and unfortunately he only has one rate for the swift in the rear which is 11k. Since they are custom made I am sure they are costly which is probably why he had to choose one rate to try to appease most users.

Rusty

You could have the compression set too stiff and the shock will not move fast enough. Or the rebound too soft and the shock springs back too quickly. Since the OP has everything set full soft. It's the later. And if he never has played around with adjustable shocks before. He might be pulling his hair out until he learns the in's and out's about them.

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axmea?

Assuming your install and damper settings are correct, what you are feeling is normal especially when you mention freeway splits where you have poor grade points and grade separation. If you voted for a bullet train for CA instead of fixing out freeways, that's your fault. Kidding aside, do you have anything on how your car steers? No mention of over/understeer to help us out.

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Jhill

Lol **** ca is never going to fix its roads we all know that. To above poster there is no compression adjust in the powertrix it is only rebound. In a sense that is a good thing as that means they actually spent the money for a one way piston bolt to eliminate cross talk. But yes I think the rebound may be a bit too fast I'll have to test it a bit over the week, just giving my honest initial impressions before I try to conivince myself it's what I want (as a lot of people do after spending lot of money on something). Smooth roads and OMG awesome setup but as I stressed from day one this car is daily driven and 99.5% street and I'm not in a race league so not competing just want a touch better than oem, if oem is level 5 then I'm ok with level 7, not trying to hit 11. As this setup has proven there is definey improvement to be had by just the shocks, however most if not all the aftermarket shocks tend to have a very steep digressive setup with a bias to a jacking down rebound which is horrible for rough road (oem is jacking down bias). Was hoping to get something that can be a touch jacking up or neutral for street and then a jacking down bias for track/smooth.

I'll let you guys know how I feel after a bit but initial impressions are it's a solid product but just not right for my purpose.

Oh as for oversteer/understeer I really can't say as I didn't push it on the uneven surfaces which is another thing, stiffer is not always better, hit a bump with hard suspension and it upsets the car and loses mechanical grip, after a few dips and getting ejected I didn't feel very confident in pushing the car in a turn. That said the few sweeper I did try it felt very good and like a flatter oem, which makes sense as oem f/r rates are very close to each other and so are the powertrix so I give them points there for following oem balance and not gaining a bunch of understeer.

littlejuanito

Yes, firm up the shocks a bit and let us know if that improves the ride quality.. I know that forum member Axmea dialed in a 5 front and 4 rear setting when he installed his so hopefully he can chime in as well.

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Fast Intentions Non-Resonated Carbon Fiber CBE | Berk Non-Resonated HFC | Powertrix Coilovers | RJM Clutch Pedal | LatheWerks Shift Knob | Stillen Sway Bars, |SPL Parts | Enkei RS05RR | Fujimura Diffuser | Ecutek Tuned by Seb | 308whp

Hotrodz

I don't have PT but just changed out my springs from 11k front and 8k rear to 13k and 10k. I love the stiffer set up. If you want we can work something out on my 8k springs if they will fit. The size can be depicted by the color of the springs. Mine are blue.

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Jhill

Hmm interesting, fortune uses a standard coil on rear so more options, I would need their spring seats though. In theory is should work though since PT standard non swift rates are 12/10 and theory states can go up or down 2k so I guess I could go all the way to 10/8 provided the rears fit.

Hotrodz

I was informed that Swift springs tend to be less stiff than other springs at the same spring rate.

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Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:|Fast Intentions 3" TT-TDX|SpecialtyZ/Fast Intentions 72 Row Oil Cooler|SZ 6 Puck Clutch & Flywheel|3GsCustoms|Z1|Wavetrac|Hotchkis|Whiteline |Blitz|Fortune Auto 500|Fujimura|SPL|H&R|TK|TWM|RPM Rollbar|Sparco|Next Level Performance|TrackSpec|AeroFlow Dynamics|Pioneer|

Jhill

Ok set rebounds at 11 clicks out front and rear and major improvement in the bucking. May set rear one slower than fronts since they seem to be the one bucking (less weight on them). Still a bit firmer feel than I desired but at least the ride is staying flat. Need to tweak my ride heights as they are a bit off and a bit lower than I had desired. I'll keep posted but just the same short trip with the same dip that was horrible yesterday is 100% better now (not sure who would drive these in full soft, scary ejection seat lol).

Spooler

Glad to hear it. I am looking forward to tuning mine. I am going to try and install mine over Thanksgiving holiday. I will doing Black Friday under the car I hope.