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Discussion Starter · #1 ·
Hi there, I'm looking into fitting Koni variable height coilovers on my 155V6 and I would appreciate hearing from anyone who has these or knows about them. I want to know if there are any other manufacturers who make variable height suspension suitable for the 155 and what particular types anyone has used. I'm a bit unclear about whether or not fitting these has any effect on the shock absorbers. Do they give a harder, sportier ride? I'd be grateful for any feedback. You can email me direct at [email protected] Cheers, Justin.
 
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Discussion Starter · #2 ·
As far that I know,Koni dosen't make adjustable coilovers for the 155.But it can ofcource be build up with their racing parts.But it is not something just to do.

H & R does make a adjustable rideheight kit,atlest for an 2,0 TS 16v.Get their adress on www.tuninglinx.com .

Hope can help.
 
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Discussion Starter · #3 ·
I'm a little bit concerned about changing my suspension now. As my 1.8 16v's advantage over most other cars seems to be at very high speed/revs I am worried that fitting firmer suspension will ruin the high speed handling. Normally slighly softer suspension seems to hold bends a touch better than a hard set up at speed, especially on uneven British roads. I have a set of -40mm PI springs which have not yet been fitted. Your thoughts please....
 
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Discussion Starter · #4 ·
Thomas G, thanks for that. I will check it out.
Rob, Thats the thing, all I really want to do is lower the car a bit. I'm not too sure yet if I actually want to firm up the ride. But I don't want to cut the springs or whatever and find I have stuffed it up and its irreversible. More importantly my car is a daily-driver and I'd like to be able to drive up on kerbs etc when necessary. I thought coilovers would be best as they don't seem to alter the shocks much. Or am I wrong?
 
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Discussion Starter · #5 ·
Excess, I think that the coilovers may be more than you need really. In my opinion you would be better off going just for springs. It will drop the car a bit but shouldnt alter the cars' useability. Coilovers are really only necessary if you're a track-day monkey!!!
 
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Discussion Starter · #6 ·
Hi excess,

If it is only to lower ride height I would recommend H&R springs. I have been reliably informed by a specialist who also has much race experience that they are the best non coilover units springs available.

This is apparently because they are only as firm as the speed you go exert into a corner not as hard as rock when you don't need it like the others such as eibach etc etc.

Progressive stiffness in other words and they won't really ruin your normal dampers like most really stiff springs do. Ride height is lowered about 30mm.

I will be fitting a set in the next month or two myself as I want to lower the tyre sidewall depth from 65 to a 50 profile and the arch gap will look rather silly otherwise!!

If your heart is set on race set up coilover's then there can be only one!!! 'Leda'

Hope this is of some help

MAK
 
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Discussion Starter · #7 ·
Mak, the rolling radius of your wheel/tyres is going to be significantly reduced. Thats going to make quite a change to the handling and performance of the car - a 65 down to a 50 would probably equal a reduction of an inch or two of rim diameter I should think.
 
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Discussion Starter · #8 ·
Yeh I do realise that Rob, a friend has put a set of 13" weller Racing wheels on his 33 cloverleaf with 50 profile tyres its noticeably quicker 0-60 at least 0.6, probably higher. I realise you lose some top end but we have never cared about that!!!

Although that isn't my main motivation, at present the tyre size is 195/65/15 and I was going to change them to 205/50/15 when the wheels come back from being restored! On the 3.0 liter they are 205/55/16 as standard, but 16's won't fit mine without loads of aggro as they are 5 stud hub pattern and mine are 4, and 164's are difficult to match with aftermarket alloys. I havn't really ever seen one with a set I like much to be honest.

Bad boy looking 164's I think look rather silly, just as long as they go well!!!

You have got me thinking though, I will enquire about it first just to make sure that it isn't going to have a detrimental effect on handling as this is what I am hoping to improve!

Cheers Rob and anyone with any knowledge of this who has a suggestion would be appreciated.

MAK
 
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Discussion Starter · #9 ·
Mak,

The thing is... when you say the 0-60 time is quicker, where are you getting the 60mph reading from? if you're getting the 60-mph from the speedo, then i'm afraid you're wrong.
Adjusting the overall circumferance of the wheel will also put the speedo reading way off line... 60mph in the 'adapted' car wil probably be around 50mph in real life.
You might find it's actually made the 0-60 time slower...

I would say to check all that out first. before changing the wheel size.

Of course you may know this all ready and have had it checked out... :)

good luck
 
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Discussion Starter · #10 ·
Hi jason, its not from the speedo, I understand what your saying about the speedo being out beacause obviously they are set up at the factory for standard wheels etc and the manufacturer obviously has to balance a tyre's outright performance with how they percieve a customers comfort needs also when testing sidewall depth etc.

I do not understand the complex technicalities of it so take guidance from those who do. The Alfa specialist/race engineer who runs a 420bhp 1.8 Nitrous AR33 that I know, swapped his 16" momo's some time ago for smaller wheels again, as he is losing at least a second off the line sprint and races Tvr's reguarly on the road the nutter! This is done with the digital stuff such as 'Top gear' use and is a fact jason honest!

It seems obvious to me that smaller wheels with less circumference will allow the car to move quicker from stand still or low speed and obviously if you have 17" wheels say, then top speed is increased although I admit a point must come when the opposite happens somewhere in the acceleration cycle and an adverse reaction can happen I think it's above 60mph though!!

I guess its a question of balance and where you feel your driving priorities are, a bit like ignition remapping.

Expect this is as clear as mud and is really a side issue to as regards what I was going to do with my tyres in relation to improving the handling, if you have an opinion on changing the tyres to this degree Jason I would be interested in hearing it. I will let you know what happens before I fit the tyres.

Yours with the utmost respect

MAK
 
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Discussion Starter · #11 ·
Mak :
You could also bye my wheels/alloy's.It's a set of Azev model E,and the size is 8,5 x 18" with 225/40-18 tyres.Just a thought.
 
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Discussion Starter · #13 ·
Mak :
The diameter is the same.And the tyres are only 1 centimeter (0,39") wider in each side than you'r 195/65-15.And I have driven with them on my 155'er,so I guess there also is room on a 164'er?
 
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Discussion Starter · #14 ·
Mak,

cool, i wasn't sure but it seems as though you've got it sussed :p

18's... hmmm i think i know someone with a landrover that these might fit on :D

enjoy!
 
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Discussion Starter · #15 ·
Yeh I know they would probably fit Tom were just messin' the english humour sometimes gets lost across the world's server's

:D :D :D

MAK
 
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Discussion Starter · #16 ·
Jeez, I go away for a day or so and look what happens. My enquiry about suspension turns into a discussion about wheel size... ;-)

Anyway, getting back to me :) has anyone heard of the “progressive stiffness” that Mak spoke of about 10 posts ago? Perhaps this may help you Rob - although you’ve already bought your springs. Has anyone else heard of springs possessing the ability to harden as more force is exerted upon them?

Mak - thanks for the advice. I have checked out the H & R site and although I don’t sprakken ze Deutsche I have located springs for a V6. Part No 29923-2 lowered approx 40mm. Are these the ones you were talking about?

Rob - thanks, I have gone off the idea of an adjustable kit. I too am quite happy with the ride as it is and I agree that I’ll never have the need to make adjustments to the suspension to alter my oversteer or anything like that.

But I’d appreciate it if anyone can confirm what Mak said about these H & R springs. Then I might get some...
 
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Discussion Starter · #17 ·
Hi excess, I know they do more than one but I'm sure if your not changing the dampers then anymore than a 30mm drop can cause problems.

As for the stiffness thing after reading again I see it can sound like they have some sort of intelligence built in! Not being an expert on spring tolerances all I can think is that the stiffness strength is changing throughout the spring coiling but I could be wrong!

If you arn't in a hurry I shall check in my local tuning shop who are going to order mine for me, and see if they can get me the part number for a 155 V6 with a 30 mm drop not 40mm.
Is it a widebody version or earlier as I'd imagine it was different.

~~~~~~~~~~~~

MAK

164 Super
 
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Discussion Starter · #18 ·
Hi Mak, so you’re buying your own set of H&Rs based on what you had heard about them? I guess that means you must have faith in what was said about them. This specialist who recommended them, it is the same guy who’s got the 420hp Alfa 33?

Anyway yes, I’d appreciate it if you could check it out for me. The H&R site (http://www.hr-spezialfedern.de/html/tabellen/sportfedersaetze/tb-sfs-alfaromeo.html) shows the 155 is the only car with 40mm drop. Would they make such springs if they knew they’d be a problem? They’d be better sold as a kit then wouldn’t they? I notice Rob said he had springs that were –40mm. What kind of problems would occur?

Widebody? - do you mean a Series 2 which has a wider track and a quicker steering rack? I should have a series 2 model. Otherwise I’ll be suing the dealer I bought it from… :) The H&R site says something about Type 167s. I’ll check my chassis no. tonight to see if that yields any clues.

In the meantime, thanks.
 
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Discussion Starter · #19 ·
excess,

soryy for hijacking the wheels.... sorry i mean suspension chat here :OP

i think the problem with dropping the suspension 40mm with standard shocks (shock absorbers/dampers)is that the standard shocks don't have the higher damper rates that the uprated ones do, so therefor there's a very high chance of the shock 'bottoming out' (piston hitting he chamber end)
I agree with Mak in thinking that 40mm is just that wee bit too much of a drop and that 30mm would be the max i would use without changing the shocks.

Probasbly not any help but just confirming Mak's views.

good luck!
 
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Discussion Starter · #20 ·
Yeh Justin it is the same guy although he has 'Leda' race coilovers on his 33 and I have been told to get H and R by a number of people actually.

Sorry I do mean a series 2, in the UK they are quite often referred to as 'widebody' models.

Passed the garage today, had the time so I popped in! Right, they do 2 types listed for ALL 155 V6 so widebody details didn't matter!

Product number for 'Fast Road' of which I will be fitting is: FA155/1 FA

Or for race stuff which the garage guy said would be like rock and probably nacker your normal dampers pretty quickly the number is:

RA155/2 RA

Also 40mm is standard drop listed for the H&R springs on 155 so he said it shouldn't be a problem with normal dampers on your car and they have lowered others without reported probs by 35-40mm. So you learn something new every day or in this case Jase and myself do!

Just out of curiosity Justin what do you get to a gallon driving steady in the urban cycle? With our prices for fuel it scared me off a 2.5 V6 to be honest :confused:

Hope this helps (probably ties in with what you found on website)

Enjoy


MAK
 
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