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displaying posts 1 to 16 of 16
| Author | Subject: 21mm TB considerations |
 99rallye
Regular  Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #1
Looking for a bit of advice.I want to run 21" TBs on my Rallye with a standard ARB, what is everyone's experience? I will be running them with Bilstein B8s on the the front and B6s on the rear. Does the spring rate need to be considered when running 21" TBs? |
 Posted 6th Oct 2015 at 14:48
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demondriverdan
Seasoned Pro  Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #2
I hope you mean 21mm, 21" TBs would be pretty big!  People have run them with a standard ARB without issues I believe. You will ideally want to pair the spring rate with the TB size. I remember seeing a handy table on the forum somewhere which lists TB size and preferred front spring rate but can't find it at the moment. ________________________________________ Rallye Race Car |
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Posted 6th Oct 2015 at 14:02
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dangti6
aka JKshooter  Location: Taunton, Somerset Registered: 15 Jun 2006 Posts: 10,305 Status: Offline |
Post #3
Perhaps match with VTS front springs and have the benefit of the subtle drop. ________________________________________  |
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Posted 6th Oct 2015 at 14:42
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99rallye
Regular Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #4
Ha ha....yeah. 21mm!If anyone can post a link to the spring rate table that would be great. |
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Posted 6th Oct 2015 at 14:48
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dangti6
aka JKshooter Location: Taunton, Somerset Registered: 15 Jun 2006 Posts: 10,305 Status: Offline |
Post #5
From the 106 forum:18mm 90lb/inch 19mm 110lb/inch 20mm 135lb/inch 21mm 165lb/inch 22mm 195lb/inch 23mm 235lb/inch 24mm 280lb/inch 25mm 330lb/inch Perhaps proportionally adjust for the extra length of a 306 bar over the 106 items. ________________________________________ |
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Posted 6th Oct 2015 at 15:34
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Day666
Seasoned Pro  Location: Bristol Registered: 20 Apr 2013 Posts: 5,212 Status: Offline |
Post #6
I ran 21mm with stnd ARB but with the better Bilstein group N Tarmac rear dampers & front B8s with Eibach springs from Kam racing & my 6 was amazing at Castle Combe FCS & Amazing at Prescott hill climb Pugfest ...Have solid rear mounts all times .... Now gone to 30 ARB biggest I could fit ...but still kept 21mm bars in refurbed Jord294 axle ...but also gone to Bilstein GroupA Peugeot Sport rear dampers from Kam racing ...was scary responsive round corners & felt really more planted out of corners at same Combe track last month after FCS . Was it worth all the cost ....NO ....did I notice difference YES ....10% better ....which is a lot in handling terms ... My tyres with the new setup are working harder now...but I'm going quicker  But I do have a 3j plate diff which I think compliments my newer setup better ...now coming out of corners flatter & seems to be making my stnd b8 fronts / Eibachs work less ...it gives for more road feel now ...much twitcher yes ...but more feel & feed back on the wheel ... Also used both in the heavy rain & the Stnd ARB with 21mm bars was easier to driver but not so planted ....my driving style may be different to others but the car feels much quicker in the dry & wet now but you feel more on the edge in the wet & it feels like it wants to beat you up in the wet now ... Hope this helps  PS forgot ...before running both set ups I have removed 110kgs of weight from the car also . Used same tyres both times at Combe . Also... My mechanic driver friend doesn't like 30arb because it's less forgiving even in the dry .... I think ...the 21mm with stnd ARB & bilstein group N rear dampers with front b8s / Eibachs is a amazing setup & really hard to beat all round ....never used B6 stnd sorry A good read ...http://www.timeattack.co.uk/bilstein-the-lowdown/#sthash.PEHE5Gdo.dpbs |
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Posted 7th Oct 2015 at 09:44
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99rallye
Regular Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #7
Thanks for the help on the table Dan and thanks for the DETAILED response Day666!I can't find the spring rate for the -30 eibach springs. Does anyone know what it is? |
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Posted 6th Oct 2015 at 18:15
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aaron6
Seasoned Pro  Location: On the sofa in maidstone Registered: 16 May 2006 Posts: 5,840 Status: Offline |
Post #8
You going for solid mounts too? It's really not a necessity. I love the way mine corners on the rubber mounts.________________________________________ See the sheer power and might of the lesser known burrowing owl. |
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Posted 6th Oct 2015 at 18:56
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99rallye
Regular Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #9
Na, I'm going to keep it on rubber mounts. I'd like to retain some of the road compliance |
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Posted 6th Oct 2015 at 19:41
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demondriverdan
Seasoned Pro Location: Londinium Registered: 29 Nov 2010 Posts: 2,665 Status: Offline |
Post #10
I've put solids on the road car and am not massively convinced. I have them on the race car and it's fine but just seems a bit meh on the road car.________________________________________ Rallye Race Car |
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Posted 6th Oct 2015 at 19:55
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99rallye
Regular Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #11
Cheers Dan - that makes me feel better for not being ao hardcore!Does anyone know the spring rates of -30 eibach springs? |
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Posted 6th Oct 2015 at 20:19
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matt16v
Regular  Location: SE Registered: 24 Jul 2011 Posts: 217 Status: Offline |
Post #12
Couldn't tell you the spring rates of the Eibachs but I run them with B8's up front, B6's at the rear and 21mm bars, standard ARB. For the road I think it's the perfect balance. Not taken it on track yet but get the feeling it will perform well. It's the wrong set up for an all out track car but for fast road / track days it's perfect.________________________________________ 1999 Astor Grey GTi-6 OEM+ |
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Posted 9th Oct 2015 at 09:45
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Denis
Regular  Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Post #13
99rallye wrote: Does anyone know the spring rates of -30 eibach springs? They are progressive springs: 150-180lb ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 20th Oct 2015 at 23:12
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99rallye
Regular Location: Hitchin Registered: 26 Aug 2009 Posts: 348 Status: Offline |
Post #14
Thanks russian guy! |
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Posted 20th Oct 2015 at 23:17
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Denis
Regular Location: Cambridge Registered: 07 Sep 2004 Posts: 491 Status: Offline |
Post #15
No worries, I’ve had Bilstein B8s / Eibach springs / 21mm bars and thought that the setup was excellent for general use.I liked it enough to fitted similar kit (B8s with Eibhach springs) on my E46 BMW (when original dampers started to leak) and it does not work – too stiff for road use. ________________________________________ Cherry Red Rallye Project threadWhiteBMW M140i |
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Posted 20th Oct 2015 at 23:36
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #16
funny that, I have b8 and alpina/eibach on sn e34, its still so comfortable! still leans like hell but has quite a lot of mechanical grip for an old car.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 20th Oct 2015 at 23:53
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