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Suspension & Brakes Theory, alignment, spring rates....

Need some suspension tuning help from all you road race, road course experts?!

Old 04-08-2015, 11:24 PM
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Default Need some suspension tuning help from all you road race, road course experts?!

Setup:
Integra type R: b18c bolt ons
Coilovers: Skunk2 pro s2 8kg front 8kg rear
Bushings:All new ball joints, control arm bushings, trailing arm every bushing is polyurethane almost..
Wheels rims: 16X7 OEM 98 spec type r rims on 205/45/16 potenza re760
Sway bars: 24mm type r sway bar front.... 23mm type r sway bar rear
Subframe: Blackworks lca and subframe and blox adjustable endlinks.

To make this simple... my problem is before when I was running stock suspension my teggy while cornering would feel perfect, the front felt loose and was moving on a pivot felt like the rear was squatting and i could just point to where I want to go, main thing is i can control my car very well with this setup as i felt the rear was being planted softly and it felt like a RWD... just perfect!

Now this new setup when I take corner, my front feels fine but my rear doesnt squat down at all and it feels way too stiff like its giving me a weird feeling body roll mid corner exit the rear won't squat down and grip like a **** like my stock setup, it feels overly to stiff or something. Now...... the problem I think can come from two things my rear spring rate is too high and its not dampening correct but I see people running 14k rear spring rates!!! And the other thing is my LCA comes with 3 holes soft, medium, hard. I messed up real bad the middle threads for neutral handelling, and was forced to use ethier soft or hard so i choose hard. And adjusted the endlinks to fit. Went on good.

Ok i get it now.... its like when you acelerate to a high RPM it forces the rear to squat down giving you traction to control the over and understeer and makes turning feel like butter, I no longer have that ability....

What should I do different?

Btw tire pressures are 33front cold 31rear cold.
36hot front 33-34hot rear
I tired messing with tire pressures no difference. I want the squatting feeling to come back
Old 04-09-2015, 09:22 AM
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Default Re: Need some suspension tuning help from all you road race, road course experts?!

I'm not an expert, but it looks like you have a wider diameter sway bar upfront than you do in the rear.
If anything it should be the other way around. That way energy won't travel across the suspension so easily. In a perfect world its better to have each wheel acting independently. I would increase diameter moreso in rear and have a very low diameter in the front. This will allow for better traction upfront so your car will turn where you want it to go. Since the front steers the car and puts down the power.

Now reading your post about the "rear wont squat down"

I'm not understanding this. The integra is FWD. So why would you want such a heavy transfer/squat to the rear of your car. When your Front Wheels are doing the steering and putting the power to the floor. When I read your article it sounded like you miss having a loose front and a rear that squat. That sounds like something prone to understeer to me. Which is not good. The stiffer springs and dampers of course are going to take that "squat" feel away. Since when your weight is being transferred under acceleration the stiffer spring resist the weight better. This is actually better for response. So it sounds like your suspension is doing its job. Keep weight over your power wheels and steering wheels. So the contact patch of the tire is bigger.
Old 04-09-2015, 09:33 AM
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Default Re: Need some suspension tuning help from all you road race, road course experts?!

I think it's really hard to improve on a Type R suspension because they come out stock with a very well balanced car already. So throwing on suspension mods might decrease what you already had imo. Unless you are really good at suspension tuning and buying the best money can buy.
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