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clubstylus - View topic - Retro fit independant rear suspension
It is currently Sat Jan 18, 2020 4:54 pm




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 Retro fit independant rear suspension 
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension

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I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Thu Feb 21, 2013 11:26 am
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Joined: Wed Jan 30, 2008 2:09 pm
Posts: 232
Location: Suffolk
Post Re: Retro fit independant rear suspension


Thu Feb 21, 2013 11:43 am
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension

_________________
I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Thu Feb 21, 2013 12:14 pm
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Joined: Tue Feb 24, 2009 2:51 am
Posts: 78
Post Re: Retro fit independant rear suspension
Not sure how much bump or rebound there is at the moment, I will try and see the car the weekend, I believe that they have 'copied' the set up on the original silvia that donated the uprights, diff and drive shafts, yes the car does have strong springs, can't remember what at the moment as they are in KG, the dampers are fully adjustable, for bump and rebound, booked a track session for the 7th of april for tesing so will know more then.
Tell me why you think the bump is to little, your eys is better educated than mine, (althought I hope not the engineer who built this).
The car does not need much suspension movement as it only runs at Sepang, which is very smooth, although I am hoping to run it at the Macau GP this year, which will be lot rougher.
Kelvin


Fri Feb 22, 2013 2:49 am
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Joined: Wed Jan 30, 2008 2:09 pm
Posts: 232
Location: Suffolk
Post Re: Retro fit independant rear suspension
Firstly, I'm no expert on these things - a little bit of knowledge is a dangerous thing after all :wink:

Image

Bump travel appears to be between the two solid lines. You are then into the bump stop until the upper dotted line. The lower solid line to somewhere near the lower dotted line (I'm assuming the length of the piston here for the purposes of example) would appear to be the rebound travel.

I appreciate you are running only on a smooth track, but that doesn't mean you don't need suspension movement to maintain your contact patch.

As I say, I am nothing more than an interested novice, so I may well be mis-interpreting it - I'm sure it will work just fine for you.

Dave


Fri Feb 22, 2013 11:42 am
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension
'' Dave DH2 '' ---- one of the points to be aware of with bumpstops is that , in the main , cheaper coilovers tend to have really hard rubber bumpstops so the piston travel available finishes there . Others like mine , for instance , have a much softer compound so can be compressed quite easily up to a point . I can squeeze the bumpstops on my TRAKSPAX double adjusters with my fingers through the spring gaps.
My visable piston travel up front is just 12mm's but can actually move down 25mm's which is ample. As long as the piston doesn't come to a halt on something solid then it's working.

_________________
I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Fri Feb 22, 2013 12:01 pm
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Joined: Wed Jan 30, 2008 2:09 pm
Posts: 232
Location: Suffolk
Post Re: Retro fit independant rear suspension
Yep I'm aware that it looks like Kelvin has these progressive bump stops on - but they will become solid relatively soon...


Fri Feb 22, 2013 12:55 pm
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Joined: Sat Dec 24, 2011 12:20 pm
Posts: 98
Post Re: Retro fit independant rear suspension
I did an extremely short stint in the chassis tuning department at work, and found it very interesting how they went about it. In the very early stages of development (steady state) the balance of the car in high mu conditions (i.e., dry) was tuned using a combination of ARB, springs and spring assists (or bump stops). In low mu the car can't generate enough 'lat acc' to hit the spring assists, so it's just ARB and springs in that case. Damper and bush tuning refines the transition phases of cornering and of course ride. One model went through 600 iterations of damper set up alone!

Not sure how relevant that is to the topic but I thought you might find it interesting.


Fri Feb 22, 2013 8:10 pm
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Joined: Sun May 29, 2011 10:15 pm
Posts: 272
Location: Ventnor, Isle of Wight
Post Re: Retro fit independant rear suspension
Craig, that's some serious patience to fine tune to that detail - I envy those with the attention span to manage it!

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Fri Feb 22, 2013 10:48 pm
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension
That's what it takes but some never bother , even in competition. Personally , I have always enjoyed ' set-up ' and my theories behind it , just as much as competition . In fact competing for me is really to ''proof'' the set-up.

_________________
I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Fri Feb 22, 2013 11:53 pm
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Joined: Tue Feb 24, 2009 2:51 am
Posts: 78
Post Re: Retro fit independant rear suspension
OK Looking a the pictures I am not to worried about hitting the bump stops, say there is 15 mm of movement before the bump stop, that would be 30 mm at the outside of the wheel, (say) and that would be more than enought to foul the rear body, I am going to look at the car on tuesday for the day with tape measue and paper. Also I don't think there is aproblem in moving the shock upper mount up if needed, these are expensive shocks. I was more worried about there actualy being enough rebound travel for the spring to fall out.


Sat Feb 23, 2013 7:46 am
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Joined: Tue Feb 24, 2009 2:51 am
Posts: 78
Post Re: Retro fit independant rear suspension
Seen the car now, bump and rebound look ok, car is on stands so full rebound is easy to see, and bump kooks ok when on the wheels, currently fitting rear arb


Wed Mar 06, 2013 1:34 pm
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension

_________________
I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Wed Mar 06, 2013 2:21 pm
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Joined: Tue Feb 24, 2009 2:51 am
Posts: 78
Post Re: Retro fit independant rear suspension
Ran the car sunday, absolutly fantastic, could not get lap times as a track day and could not get clean laps, and I was not well with alung infection, but the car is much quiker on the long fast right hand turms (3 and 10 due to the longer diff stoping me hit the rev limit) and much faster in the fast turns 6,6 7 and 8 and very much faster throught the dound hill sweepers at 12 and 13 due to increased grip.

It was way faster then the Hicom 'works' westfield zeetecs (they ran 6 with good drivers) and else nothing came close to it it overtook everything. WRX's Evo's 911's Vtec race cars, way the fastest car on the track, now painting and final body mods and I'll put up some pictures

Definitly worth the effort I'm thinking at leat 5 secs a lap,


Tue Apr 09, 2013 10:10 am
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Stylus owner

Joined: Fri Mar 10, 2006 8:49 pm
Posts: 3750
Location: ASTON CLINTON BUCKS
Post Re: Retro fit independant rear suspension

_________________
I just love the Stylus but she keeps swallowing £££ !
[b]Alfa Red 159 2.4 jtdm ti 260bhp 365lbft / BilsteinB12 + Adjustable Powerflex camber/castor bushes. Red STYLUS 2lt zetec 231bhp 185lbft Dunnell . RED 1972 Alfa 2lt GTAm replica 170bhp.


Tue Apr 09, 2013 10:36 am
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