General Chat
19 September 2011, 10:40 PM
#6691
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Sprung mass is a bad thing
wide stance
This can be a good thing but also a bad thing. It's never always a good thing.
stiffened suspension
You don't want stiffer suspension. The suspension is only there to support the car. Stiffened suspension will only ruin the ride. There are other methods to improving roll and pitch.
low COG
Although typically a good thing going too far will bring you lower than your roll centre and will actually make it worse than it was before.
negative camber
There is a fine point between getting the maximum from your tyres and plummeting over the edge. After a certain point more camber will make the handling worse, almost like driving on narrow tyres.
they can all only make the handling better in my book.
Just my 2 cents, discuss....
20 September 2011, 02:19 AM
#6692
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I'm only discussing the handling here, the ride is a completely different thing, and I'll be the first to admit that it's f**ked, pretty sure going over Niagra Falls in a barrel would be more comfortable!
Tru dat, but I can't see there being a huge different between my wheel with its thin spokes and low-profile tyre and the original chunky wheels with their huge tyres. If I get chance I'll weigh them.
When is it a bad thing?
I've already got front and rear upper strut bars, they were fitted before the silliness began and they improved the roll no end. (I'm considering removing the front one to try and stop it understeering, although my budget ditch-finder tyres probably don't help there...)
The stiffness is purely because of the lowness and I do want stiffer suspension, when you've got as much arch gap as I haven't, you need the suspension as stiff as you can get it, if I had it as close to the arches as I wanted, I'd need a solid bar welding in ;] I know the stiffer the suspension the less the wheel is able to follow the contours of the road, but for tarmac driving, the stiffness isn't really a problem since the car doesn't get bounced around as much as it would say off-road.
Roll centre I have no idea about, I know the concept of it, but not entirely how it affects a vehicle's dynamics.
Yep, I like camber as much as the next guy, but there's a limit to where it just looks stupid and dangerous (there's usually a Dubber involved...) but I'd like to think I'm still on the right side of that limit. The outside of my tyres are only just off the floor (from what I can remember), so when loaded up in a corner the whole tyre should have a nice even contact patch. And since it's a GX, I don't have any problems with grip when accelerating in a straight line 
I'm not professing to have made some ultimate track weapon, or even saying it's as good as it COULD be, but it IS better than stock.
Sometime I wish I'd done an engineering degree at uni, much more fun than video games :|
Tru dat, but I can't see there being a huge different between my wheel with its thin spokes and low-profile tyre and the original chunky wheels with their huge tyres. If I get chance I'll weigh them.
The stiffness is purely because of the lowness and I do want stiffer suspension, when you've got as much arch gap as I haven't, you need the suspension as stiff as you can get it, if I had it as close to the arches as I wanted, I'd need a solid bar welding in ;] I know the stiffer the suspension the less the wheel is able to follow the contours of the road, but for tarmac driving, the stiffness isn't really a problem since the car doesn't get bounced around as much as it would say off-road.
I'm not professing to have made some ultimate track weapon, or even saying it's as good as it COULD be, but it IS better than stock.
Sometime I wish I'd done an engineering degree at uni, much more fun than video games :|
20 September 2011, 07:28 AM
#6693
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as long as you like it mate it is low i like it but im young some people on here wont like it because its being lowered i get people saying to me why have you lowered it they dont need to be lowered. and imho they look so gay when riding standard ride height but its just what your happy with everyones got there own opinions havent they. one thing for sure i havent seen another one like yours.....
20 September 2011, 07:44 AM
#6694
Scooby Regular
There is such a thing as too wide, take the Clio V6 for example. Terrible handling car purely because it's too short. Saying that you can't really make the Impreza that wide.
I've already got front and rear upper strut bars, they were fitted before the silliness began and they improved the roll no end. (I'm considering removing the front one to try and stop it understeering, although my budget ditch-finder tyres probably don't help there...)
The stiffness is purely because of the lowness and I do want stiffer suspension, when you've got as much arch gap as I haven't, you need the suspension as stiff as you can get it, if I had it as close to the arches as I wanted, I'd need a solid bar welding in ;] I know the stiffer the suspension the less the wheel is able to follow the contours of the road, but for tarmac driving, the stiffness isn't really a problem since the car doesn't get bounced around as much as it would say off-road.
A vehicles roll centre (RC) is the theoretical point (vertical height relative to road) around which the vehicle will roll, either front or rear. Intersection of these points from rear to front determines roll axis.
The angle of the lower control arm relative to the ground is also part of the calculation on MacPherson strut equiped vehicles. Excessive lowering will almost always invert this angle leading to more roll, sometimes exponentially if this results in a "subterranean" RC. (Very bad from a handling point of view)
MacPherson strut equiped vehicles are reluctantly used for racing because one fundamental drawback of the setup is that it delivers a "migrating roll centre", generally down. That is, the lower the ride height or the more a wheel is compressed the lower the RC becomes, exacerbating roll which further lowers the RC.... (Note that roll compresses outside wheel suspension further lowering RC as it does).
TL;DR - Excessive lowering makes the car roll more and you end up driving on two wheels instead of 4.
Yep, I like camber as much as the next guy, but there's a limit to where it just looks stupid and dangerous (there's usually a Dubber involved...) but I'd like to think I'm still on the right side of that limit. The outside of my tyres are only just off the floor (from what I can remember), so when loaded up in a corner the whole tyre should have a nice even contact patch. And since it's a GX, I don't have any problems with grip when accelerating in a straight line
Oh yeah I have an MSc in motorsport engineering
Last edited by CREWJ; 20 September 2011 at 08:11 AM.
20 September 2011, 10:24 AM
#6698
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ad its all good mate up and running sounding awesome maste just needs the map on firday then its all yours and it is to nice to break but it didnt stop me breaking all mine 
pop in if you can and see it and hear it then mate
pyro that would have been jez mate i was the extremly good looking 1 there we be glad to see it back mate but you be surprised what down force is genrated at 30/50mph i recon it only take a mm or so to get your car to catch its that low it does look awesome and fair play bud
black widow come down when ever mate no excuse needed we welcome all members to come and pop in we try to make as much time for every 1 who pops in mate
pop in if you can and see it and hear it then mate
pyro that would have been jez mate i was the extremly good looking 1 there we be glad to see it back mate but you be surprised what down force is genrated at 30/50mph i recon it only take a mm or so to get your car to catch its that low it does look awesome and fair play bud
black widow come down when ever mate no excuse needed we welcome all members to come and pop in we try to make as much time for every 1 who pops in mate
20 September 2011, 12:21 PM
#6699
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Hey Nick hope you are well, you guys (and all) are welcome to our WMI midlands meets.
https://www.scoobynet.com/west-mids-imprezas-433/
Please do not take offence to this post, together we will be bigger and raise even more money for charity
west-mids-imprezas.com
H
https://www.scoobynet.com/west-mids-imprezas-433/
Please do not take offence to this post, together we will be bigger and raise even more money for charity
west-mids-imprezas.com
H
H m8, No offence taken what so ever bud, its all good
If i could just return the kind invitation, any wmi members over Worcestershire / Malvern way (or anywhere tbh) are more than welcome to pop over to our first meet sometime in early November, The founder Member Rob isnt back from the Falklands till then, but already have a dozen or so guys up for it
Will keep you informed chap, like you say "together we will be bigger and raise even more money for charity"
All the best all.
Dave.
https://www.scoobynet.com/903650-wor...l#post10245157
20 September 2011, 12:28 PM
#6700
Scooby Regular
andy nice to meet you mate hope you get it sorted if not pop in we take a look our selfs mate[/quote]
Hi all yae Matt its not played up yet the fuel filter ratteld and the fuel cam out black from both sides will up load photo in a min thanks Mat
Hi all yae Matt its not played up yet the fuel filter ratteld and the fuel cam out black from both sides will up load photo in a min thanks Mat
20 September 2011, 12:39 PM
#6701
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20 September 2011, 12:49 PM
#6702
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There is such a thing as too wide, take the Clio V6 for example. Terrible handling car purely because it's too short. Saying that you can't really make the Impreza that wide.
I beg to differ
Last edited by Mattybr5@MB Developments; 20 September 2011 at 12:50 PM.
20 September 2011, 07:27 PM
#6708
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evening been to pole earlier check out me motor ready for mapping now.!!! lagamorph seen your car there lookin nice mate what you having done bud
20 September 2011, 07:43 PM
#6709
Cambelt, service, ditching the sports cat for a decat, 3 port boost solenoid, 650cc injectors, harvey headers & up-pipe, harvey 20g and a little samco. bit worried about size of turbo but im hoping the avcs will sort it out or ill have to try and find an md321h or similar but that could take ages unless i break the bank and go new. yours is looking good mate, what headers did you get in the end? Were they working on mine already then?
20 September 2011, 07:56 PM
#6712
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Cambelt, service, ditching the sports cat for a decat, 3 port boost solenoid, 650cc injectors, harvey headers & up-pipe, harvey 20g and a little samco. bit worried about size of turbo but im hoping the avcs will sort it out or ill have to try and find an md321h or similar but that could take ages unless i break the bank and go new. yours is looking good mate, what headers did you get in the end? Were they working on mine already then?
having quite abit then mate fair play should be nice when its done you may like the 20g on yours for my style driving its no good good turbo but bit to laggy but like u say the avcs may help[ u more. yours was on ramp i think. ive had the same headers as shar and jez and matt had on his car i just let them order them lol there a sound few lads. cand wait to get it mapped tho
should feel a completely different car hopefully when mapped up
