Bump Steer.... 2 simple words....
14 July 2003, 03:59 PM
#1
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DO IT!
Thanks to The Power Station guys..... I must admit I was a bit of a sceptic, but since I've had it done I've been grinning
Ask Chrisj
Thanks to The Power Station guys..... I must admit I was a bit of a sceptic, but since I've had it done I've been grinning
Ask Chrisj
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14 July 2003, 05:51 PM
#10
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Spoon: drive a car that's had it done, then say that!
I've driven 3 now, including my own car as of a couple of weeks ago. It's instantly noticeable and it sharpens up the responses no end. Straight-ahead floatiness on motorways is gone, and understeer on roundabouts is massively reduced - the front end just grips and grips, like it was supposed to!
If you don't think it'll make any difference on the road, remember this:
Track: smooth
Road: bumpy
I've driven 3 now, including my own car as of a couple of weeks ago. It's instantly noticeable and it sharpens up the responses no end. Straight-ahead floatiness on motorways is gone, and understeer on roundabouts is massively reduced - the front end just grips and grips, like it was supposed to!
If you don't think it'll make any difference on the road, remember this:
Track: smooth
Road: bumpy
14 July 2003, 07:45 PM
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Disagree Andy, but then i've never ben a follower of fashion.
We are talking about the road, understeer, what's that, come on?
Come from the old school of 500+ bhp on standard suspension.
Everybody to their own hey.
We are talking about the road, understeer, what's that, come on?
Come from the old school of 500+ bhp on standard suspension.
Everybody to their own hey.
14 July 2003, 08:50 PM
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Don't know spoon, don't know anybody, but I do know I can get understeer on the road and I'm not especially quick. I've just had bumpsteer/droplinks (+springs) and the car is transformed. Miles more positive feedback&grip/less floaty uncertainty&scrub
14 July 2003, 10:10 PM
#17
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Spoon,
I was of much the same opinion when I first drove a car with the bumpsteer mod, but it definitely makes a difference that you can appreciate even without driving it hard. The car feels more stable and better keyed to the road, especially at motorway speeds.
Even so, I think you're missing out on a little of what owning a scooby is all about. Next time you find a suitably quiet roundabout and want to turn right, try approaching it a bit faster than usual. Turn in a bit harder. Fun? Good.
Now try a bit faster again. Feel the steering go a bit light? Find yourself backing off to make the car tighten its line and get you round? That's understeer. If you had the bumpsteer mod, you'd be rearranging the contents of your boot and enjoying serious lateral acceleration and a gentle chirp from all four tyres right now.
Still not convinced? Don't bother. Spend the money on 3 tanks of fuel instead. Or a year's road tax. Or a few weeks' insurance. It doesn't sound so expensive now, does it?
A.
I was of much the same opinion when I first drove a car with the bumpsteer mod, but it definitely makes a difference that you can appreciate even without driving it hard. The car feels more stable and better keyed to the road, especially at motorway speeds.
Even so, I think you're missing out on a little of what owning a scooby is all about. Next time you find a suitably quiet roundabout and want to turn right, try approaching it a bit faster than usual. Turn in a bit harder. Fun? Good.
Now try a bit faster again. Feel the steering go a bit light? Find yourself backing off to make the car tighten its line and get you round? That's understeer. If you had the bumpsteer mod, you'd be rearranging the contents of your boot and enjoying serious lateral acceleration and a gentle chirp from all four tyres right now.
Still not convinced? Don't bother. Spend the money on 3 tanks of fuel instead. Or a year's road tax. Or a few weeks' insurance. It doesn't sound so expensive now, does it?
A.
14 July 2003, 10:25 PM
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Andy, as I said, not on the road do I see any hint of understeer at any speed.
I can run into a bend at all speeds and hug the line I want.
You know, maybe I already have the mod in that case and don't know.
Mind you, who has it done on a JDM because I think these are far more direct than a UK model.
Edited to say, expense doesn't come into it, if it's as good as you rave then £1000 wouldn't be dear now would it?
p.s having raced cars and bikes and driven much faster road cars I'm not talking out the top of my hat.
Also, mine is as stable as dart on motorways.
[Edited by Spoon - 7/14/2003 10:29:17 PM]
I can run into a bend at all speeds and hug the line I want.
You know, maybe I already have the mod in that case and don't know.
Mind you, who has it done on a JDM because I think these are far more direct than a UK model.
Edited to say, expense doesn't come into it, if it's as good as you rave then £1000 wouldn't be dear now would it?
p.s having raced cars and bikes and driven much faster road cars I'm not talking out the top of my hat.
Also, mine is as stable as dart on motorways.
[Edited by Spoon - 7/14/2003 10:29:17 PM]
14 July 2003, 10:31 PM
#19
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Spoon what MY do you have? AFAIK, Subaru dialled in understeer into every production car so I'm surprised you say you don't see any regardless of speed 
Of course, you can drive around understeer if you know how, but that doesn't mean it doesn't exist.
Stefan
P.S. I can get my car to understeer when I want it to
Of course, you can drive around understeer if you know how, but that doesn't mean it doesn't exist.
Stefan
P.S. I can get my car to understeer when I want it to
14 July 2003, 10:45 PM
#21
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Im thinking of getting this mod but was wondering if this will effect tyre wear ?.
I had the prodrive geometry set up where i think they toe the wheels in a little, this did virtually cure the understeer but ate a new set of 18s in 2500 miles. Have had it laser alligned with the new tyres which do seem to be wearing better, but understeer is awfull.
Hows tyre wear been for you guys with the bump steer mod ?
I had the prodrive geometry set up where i think they toe the wheels in a little, this did virtually cure the understeer but ate a new set of 18s in 2500 miles. Have had it laser alligned with the new tyres which do seem to be wearing better, but understeer is awfull.
Hows tyre wear been for you guys with the bump steer mod ?
14 July 2003, 10:47 PM
#22
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AFAIK, the only two places that do this are PowerStation and Star Performance in Glenrothes, Scotland.
It's not mail order because the have to add shims to the steering arm which can vary depending on how far yours is out.
I suppose, in theory, any mechanic could do this mod if they had the right shims and new what to set the car to.
I've been told that you can achieve the same result from setting the geometry and there's no need for the bumpsteer mod. How true is this statement is open to debate.
Stefan
It's not mail order because the have to add shims to the steering arm which can vary depending on how far yours is out.
I suppose, in theory, any mechanic could do this mod if they had the right shims and new what to set the car to.
I've been told that you can achieve the same result from setting the geometry and there's no need for the bumpsteer mod. How true is this statement is open to debate.
Stefan
14 July 2003, 10:49 PM
#23
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I disagree with that philosophy. My car was A/OK with geometry, and I drove it for a while...... I had the bumpsteer done, and my car's a different beast.
14 July 2003, 10:52 PM
#24
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I guess it's partly true in that some negative camber will reduce understeer and the wheels won't splay out as much under braking. Similar to Bumpsteer, but maybe doesn't go as far and has the added bonus of excess tyre wear ????
Stefan
????Stefan
14 July 2003, 10:58 PM
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I have had eibachs fitted and geometry done at TSL and it made a big difference, would bumpsteer fix complement what I already have had done ??... bearing in mind I have a "nicely sideways thank you sir" Type R ??
14 July 2003, 11:03 PM
#26
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Would this have had the bump steer treatment? Or something Prodrivey similar?
[Edited by Daz34 - 7/14/2003 11:04:26 PM]
14 July 2003, 11:42 PM
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This mod has been around for ages, its well documented to be worth wile
If you don’t have it, GET IT, i did and it made a massive improvement to the horrible under steering monster i called an imprezza
If you aint heard about it, then you aint been here for long
Search for it
Get it sorted
Grin Grin Grin
Spoon, if you aint got any under steer, then it probably means your car is sorted in the suspension area (properly set up- probably with the mod)
OR
You aint driving in a way that illustrates it (no offence as most of my under steer came from Low speed tight corners- on the fast ones it was fine)
Try taking it to a roundabout late at night, and drive around it pushing quite hard, you’ll probably discover the under steer.
I tested mine in a car park and it was so obvious it just understeer on hard turns.
[Edited by catflap - 7/14/2003 11:46:17 PM]