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General E46 Forum
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Old 08-31-2012, 04:41 PM   #1
Sharpy67
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Raising the rear of a M sport convertible

Hi I have a 2005 3 series M sport convertible with 19" alloys fitted. when i first got the car there was no scrubbing e.t.c. I have since had an LPG system fitted in the boot which with the extra weight is now causing the rear wheels to occassionaly scrub the arch when cornering or hiting dips in the road. Is there any springs from another model of BMW which would fit straight on to mine that would raise the back end of the car around 10 to 20 milimeters.
Thanks in advance for your help.
John
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Old 08-31-2012, 04:49 PM   #2
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whats LPG, liquid petroleum gas?

You can change the springs to stiffer ones, or you can try adding the thickest spring pad.
If these are stock springs, there is a good chance theyre just tired from years of use and just replacing them would work, or maybe OE springs from a heavier model 3er, but without doing the fronts too, you risk ruining handling and potentially making the car unsafe.
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Old 08-31-2012, 05:00 PM   #3
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Hi thanks for the reply, LPG is low pressure gas, it comprises a 70 litre tank fitted into the spare wheel well.
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Old 08-31-2012, 05:07 PM   #4
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WTH is that for? you trying to get airborne?
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Old 08-31-2012, 05:10 PM   #5
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Hi thanks for the reply, LPG is low pressure gas, it comprises a 70 litre tank fitted into the spare wheel well.
I take it you installed it for long road trips? I used to have an extra tank in my 1983 240D I could go 950 miles without filling up
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Old 08-31-2012, 05:11 PM   #6
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as said, thicker rear spring pads for a small lift
http://www.uucmotorwerks.com/html_te..._clearance.htm
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Old 08-31-2012, 05:15 PM   #7
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its actually a really popular conversion done is europe, wheeler dealers tried to do it on a first generation range rover,

http://www.lpgconversionservices.co.uk/index.html
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Old 08-31-2012, 05:33 PM   #8
Sharpy67
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it was purely an economical thing, the cost of fuel in the UK is scandelous, LPG is just over half the price. Thanks for all your help, I think ill give the spring pads a go and see if it cures it.
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Old 08-31-2012, 06:38 PM   #9
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If you have a 265 tire, you can try a 255 or 245 and see if less rubber on the same wheel does the trick. What tires are you using?

And, you can do a procedure called "rolling the fenders." This rolls the inside of the fender outward so the tires clear. You did not say if the tires hit the fenders or the insides of the wheel wells.
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Old 08-31-2012, 06:40 PM   #10
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I don't understand why one would put LPG onto an M3, but I pay $4.00 per gallon, not $4.00 per liter.
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Old 08-31-2012, 06:41 PM   #11
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its not an M3... its a 318 M sport.
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Old 09-01-2012, 04:45 AM   #12
Sharpy67
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Its the edge of the wheel that is catching.
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Old 09-01-2012, 04:46 AM   #13
Sharpy67
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Does anyone know what thickness of spring pad is fitted to this car as standard?
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