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leadfoot
Joined: 11 Dec 2002
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Location: gOLD cOAST Australia
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 Posted: Fri Dec 16, 2011 8:55 pm Post subject: |
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Excuse my ignorance but assuming the coilover is adjustable does the torsion bar need to be reset in order tolower the rear and therefore preloading the coil? Or does one just install and start lowering away?
Stu
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1981 ROW 924 Turbo -
carbon fiber GT mish mash
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Fri Dec 16, 2011 11:40 pm Post subject: |
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I want to raise the back end by 5mm and obtain a more rigid behaviour of the suspension system.
However i think you can lower the car by a small amount even without reindexing.....not sure how healthy that is tho..
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Sat Dec 17, 2011 2:48 am Post subject: |
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| leadfoot wrote: | Excuse my ignorance but assuming the coilover is adjustable does the torsion bar need to be reset in order tolower the rear and therefore preloading the coil? Or does one just install and start lowering away?
Stu |
They install adjustable coil-overs in a 944 Turbo in Series 6, episodes 3 & 4 of Wheeler Dealers, if you want a general overview of how it's done...
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Joes924Racer
Joined: 03 Nov 2002
Posts: 11964
Location: Oregon, Denver Colorado native!
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| Posted: Sat Dec 17, 2011 6:43 am Post subject: |
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..just find out wich way to turn the t-bars ...to the front
or 2 the rear to lower it not raise.. oh and how many notches would do.
After a look it seems those beetle coilovers are
not available in the states. paragon front kit gets the go.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo. |
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Sat Dec 17, 2011 10:21 pm Post subject: |
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| leadfoot wrote: | Excuse my ignorance but assuming the coilover is adjustable does the torsion bar need to be reset in order tolower the rear and therefore preloading the coil? Or does one just install and start lowering away?
Stu |
Yes, initial lowering has to be done via torsion bar adjustment, then depends on the system/kit you choose.
1. Full coilover rear end + dispose of the torsion bars = All height adjustment and spring rates can be done by the shock/spring option
2. 'Semi' coilover + keep torsion bars = all height adjustment is still done by torsion bar. Coilover has helper spring to stiffen things up and avoid bottoming out (this is what I have)
However in system 2 if I have already lowered using torsion bar and install a taller spring I can raise the car. Defeats the option of retaining the torsion bars though and then carrying extra weight for no gain.
Pro's and con's of loosing the torsion bars. Most UK racers of 924/944/968's still retain torsion bars and then use helper springs on the coil over.
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WEASEL149
Joined: 19 Aug 2005
Posts: 595
Location: UK, Sheffield
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| Posted: Sun Dec 18, 2011 3:14 am Post subject: |
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Just a few points but if you lose the torsion bars and go with full coilover rear, don't you need to strengthen the rear mounts?
Also, I believe Morghen is correct - you can lower the rear a small amount without reindexing the torsion bars. I think it's around 20mm from memory but I'm not 100% sure.
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Sun Dec 18, 2011 3:19 am Post subject: |
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| WEASEL149 wrote: | | Just a few points but if you lose the torsion bars and go with full coilover rear, don't you need to strengthen the rear mounts? |
Can of worms! Some people swear this is not a problem, but I would not go this route without reinforment. . .ideally integrated into a cage.
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- WeiBe (1987 924S 2.5t) - 931 S3
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Andrew NZ
Joined: 22 Jun 2004
Posts: 744
Location: New Zealand
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| Posted: Sun Dec 18, 2011 7:20 pm Post subject: |
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| Rasta Monsta wrote: | | WEASEL149 wrote: | | Just a few points but if you lose the torsion bars and go with full coilover rear, don't you need to strengthen the rear mounts? |
Can of worms! Some people swear this is not a problem, but I would not go this route without reinforment. . .ideally integrated into a cage. |
I had to with mine, as the original mounts started cracking. May not be a problem with lower spring rates for street use.
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Andrew
1977 RX924 race car
12a bridgeport supercharged
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Fri Mar 02, 2012 9:20 pm Post subject: |
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got the front conversion kit. looks nice. i'm going to post pics in the next weeks with the result.
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