How to improve 986 driving feel?
I own both a 2007 Base with very low mileage (8k) and a 2000 'S' with 59k. In an effort to make the 2000 'S' feel more like new (and because I enjoy replacing stuff for the heck of it) I have replaced the shocks with new Bilsteins, front/rear drop links, front control arm link, front control arm, and rear control arm link. I have not replaced the rear control arm or track arm. I also now have brand new Michelin Pilot Super Sports on 18 inch rims.
Both cars feels so much alike but SO different. On tight twistys in the 20 to 50mph range both are awesome with the 2000 'S' being a little more predictable, in other words I'm more comfortable getting a little bit of slide and that I'm in charge of recovering from it (it doesn't have PSM). What does bother me is the big difference in high speed highway driving over 80mph and driving on roads that are uneven i.e. lots of swells and dips. On the highway the 2007 will just cruise with no sense of how fast I'm really going, the 2000 seems twitchy and less steady, not a good feeling at speeds like that. On the uneven roads the 2000 seems to be pulled and steered by every swell, just feels busy. Is this just the way it is or are their modifications I can make to the 2000 'S' (without making it back jarring) to give it more of that 2007 sure footedness? Or am I just a product of driving too many modern cars that hide everything that is really happening? I probably won't be keeping the 2007 for more than a year and want to enjoy the 2000 to the fullest after the 2007 is gone. Maybe these are dumb questions and nothing can be done. Really just trying to learn and i know there are guys that track all the time and understand this stuff much better than I do. Appreciate it. |
Almost certain that the alignment has to do with this issue you are describing.
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Alignment, tire issues, bent wheel, loose bushings all could cause high speed issues you are experiencing. My old 98 with 102K is solid as a rock at 130mph. Keep digging, the process of elimination works.
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Check that the tire pressure is even on front pair and back pair.
The pressure filled is also significant, too low or too high can change the handling |
Check tire pressures, and get it aligned.
However, they will never feel the same. The steering feel on 987's are not nearly as responsive as the 986. That is not going to change. If you feel like it seems wrong, it probably is. As previously stated by Topless, my car also feels completely solid at well over 100, but even at moderate highway speeds you can "feel" the road through the steering wheel. I think that makes it feel more like a sports car and actually enjoy it, but that's just me. |
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Front: Camber -0.5/-0.5 Caster 7.7/7.6 Toe 0.03/0.06 Steer ahead -0.01 Rear: Camber -1.6/-1.6 Toe 0.11/0.12 Thrust 0.00 |
I don't know about the specs you quoted but one thing is for sure, my car feels 100% solid at any speed.
Also, the beauty of the early cars is steering feel. It may feel loose, unsettled, nervous to the average driver (not saying its you!!), but at the end of the day this is what makes the car! Alignment can change a lot as to how the car feels. With some changes you may be able to dial in certain aspects. Consult with a specialist knowing about these things. |
I agree with Whip, the 986 DOES translate MORE road feel than any car I have yet to drive, except for a 911 that I wrecked on a one block test drive! I could REALLY FEEL the road then - when I wadded it up on a curb!
The 986 feel was a bit unsettling, at first. Now, it is like a glove. Exact pressure results in predictable response form the car. Going from a highly sensitive "over-powered" steering system back to the box makes you drive differently-like you were still in the other car-at first. You may even want the 986 to be more over-responsive, until you get used to "precise" steering again. Then, you can merrily be on your way at 100+mph wondering why you even bothered comparing the two. Dialing in the suspension was one thing no one mentioned….but that is another thread! |
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You can just turn the PSM off on the 987 if you want to slide a little. I do all the time.
The '94 Integra I drove was very twitchy on the highway, due primarily to the quick steering ratio "on center". |
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Jittsl - Thanks...weird i was just thinking this on the way home, I drove the car to work today and was able drive pretty fast on the highway. I was wondering if the great feel the car gives on the twistys could be making it a little more busy at high speeds. I may just live with it, I like to start a turn and not have to wait. Thanks for the help!
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What about put on a Bilstein suspension kit or KW V3.
I recently changed my ROW to KW and am very impressed. Better road feel, similar ride & better more controlled handling. |
When I put on coil overs, it made my car feel totally different. Near zero body roll. You feel every pebble you rollover.
Now I yearn for a newer box with less feel. I don't get to track mine nearly enough to enjoy all my suspension mods. |
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I have a stock suspension….be happy to trade ya! It is nice and soft, a little body roll but you cannot feel the pebbles. |
Suspension is always a tradeoff. The more precise it is, the less forgiving it will be. A coilover kit bolted on but not carefully setup and corner balanced by an experienced tech is often a lot more uncomfortable to drive and slower around a track. Get the rear of the car too low and she wallows like a pig. Experience matters if you want to get it right.
Some very broad recommendations: *Mostly street/DE car on street tires: Stock suspension or M030 tuned kit * Dual purpose street/track car on R-comp tires: M030 or PSS9s (carefully set up) * Full race car on racing slick tires: Fully adjustable coilovers (JRZ, Moton, Penske etc. carefully set up and corner balanced), fully adjustable sways, GT3 adjustable "A" arms, trackside support for suspension tuning and adjustments at each track. The basic theory here is... essentially everything revolves around our tire choices and contact patch. The higher the tire grip level, the greater the lateral forces and the more lateral control we will need from our suspension. This is of course only one drivers opinion and others will surely disagree. YMMV :) |
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Whatever you do, don't get in a new 981 Boxster/Cayman because you will need to buy one right away. The suspension is totally SWEET! |
+1 flat and compliant unbelievably comfortable and composed.....didn't even try sport mode
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http://i1114.photobucket.com/albums/...NewBoxster.jpg |
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