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Marlin Sportster, Cabrio, Berlinetta and Roadster builds Enthused or Confused about your vintage Marlin build? Ask away here or show off your build. |
5th June 2010, 19:24
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Peter - when I had my pre-IVA MOT, they didn't put mine on the rollers either. They asked me if I had an LSD fitted, and when I said yes, they said they wouldn't put on as it could 'wind up the diff'
They tested the brakes by using a weighted gizmo that they sat in the passenger footwell, and ran the car up and down the road outside the test centre.
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14th June 2010, 20:39
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Failed Indicators :-(
I took the Sportster on a trip down to Henfield near Brighton. On the way there, my turn indicators packed up completely. The Hazard switch worked OK but nothing from the indicator switch? I investigated the fault tonight and found this break inside the indicator flasher unit. (I'm using 'old skool' flasher units because of the type of swich I used.)
It was a cheap (and nasty) one bought in Halfords. I'll get a pucker Lucas one to replace it! Hoefully it will last longer than 1700 miles I got out of this one.
Apart from that, we had a good day out and using hand signals on the M25 comming back was a laugh!
I still find the front wings 'bobbling about' a bit distracting and worrying. I've been wondering if an additional short stay from the top ball joint to the inner edge of the wing would help?
...peter
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15th June 2010, 12:37
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Quote:
Originally Posted by peterux
I still find the front wings 'bobbling about' a bit distracting and worrying. I've been wondering if an additional short stay from the top ball joint to the inner edge of the wing would help?
...peter
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Me too.... I went down a huge pothole Sunday on the way back from a local show and I half expected the wing to come off. It didn't but I was probably watching it more than the road that I should have been watching afterwards...
I was also wondering about an additional stay from the top ball joint fixing. I think it would have to fix to the undersde of the wing though for strength. It would probably have to be adjustable in some way as well. It would certainly stop the wing from bouncing arround quite so much and hopefully take some of the strain off that single weld on the plate that bolts to the strut.
Perhaps we need to undertake a design study.... (Anything to get out of the DIY jobs that have been lined up for me to do)
Robin
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15th June 2010, 22:18
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Good idea!
Should it be rigid or slightly compliant to absorb/dampen the vibration?
Flat strip or round rod, like the other stays?
Steel or polished stainless?
Is anyone else suffering 'bobbling wings' or is it just me and Robin?
...peter
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15th June 2010, 22:38
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mine vibrate more than the bob about despite being a lot lighter than the stock ones.
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16th June 2010, 07:41
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I have been doing a survey of what other cars (mainly 7 style) use. Most of them use a fairly large diameter (20mm) round section stay which must be a tube or it would be too heavy. The larger the diameter, the stiffer it is. I am sure that's why Marlin temporarily used tubes for our cars - they just didn't take into consideration the weak point where it is welded to the mounting plate. So I reckon the 3rd stay should preferably be a tube for stiffness (and weight).
Robin
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16th June 2010, 07:50
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Mine vibrate.
I think I posted this in the wrong thread before, but here it is again. My idea for some 'bolt on' attachments for the e30 hub. It would need modifying, but I have no idea how feasible it would be to drill holes in the upright, considering the loads / stresses going through it.
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20th June 2010, 06:35
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I've got some decent quality replacements for my flasher units. The original's where bought from Halfrauds and were very low quality. If using this type of flashers on your Sportster build make sure you buy ones that are capable of handling front, rear, side repeaters and the dashboard lamps. The original BL flashers where only designed for 2x21W lamps and one dashboard light.
Also, I finally got some decent hub-centric rear wheel spacers. These are superb quality H&R's to replace some low cost temporary ones first fitted when I first built the car.
So now you all know what i'm doing today...
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20th June 2010, 08:05
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Looks like a nice day to be in the garage - weather doesn't look good over here...
Where did you get your heavy duty flashers from? I think mine are only rated for 4 x 21w.
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20th June 2010, 17:56
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Going back to the bobbling wings problem, which I have also pondered, is it at least partially due to the fact that the two stays can twist in relation to each other from the vibration, which is why the wings bobble??
If so, a possible solution (which is probably easier on the E36 hubs) would be a third bar, curved slightly and mounted approx horizontally, joining the other two bars and secured in the middle?
Or would this not cure the problem???
Tim
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20th June 2010, 21:01
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Peter
Those spacers look just the job and when I eventually get there I would like to get the same make. Can you advise what thicknesses you are using and where you bought them from.
Thanks, Sorton
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21st June 2010, 11:17
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Quote:
Originally Posted by GreatOldOne
Looks like a nice day to be in the garage - weather doesn't look good over here...
Where did you get your heavy duty flashers from? I think mine are only rated for 4 x 21w.
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Hi Jason,
I got them both from this guy on ebay....
http://stores.ebay.co.uk/OLD-SKOOL-M...TS-01213567546
...peter
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21st June 2010, 15:59
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Those are nice spacers, got H&R ones for mine too. I'm using 3cm per side at the mo but I think I could have gone to 3.5cm per side. All depends on your wheel offset and width
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22nd June 2010, 15:42
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Quote:
Originally Posted by timbo
Going back to the bobbling wings problem, which I have also pondered, is it at least partially due to the fact that the two stays can twist in relation to each other from the vibration, which is why the wings bobble??
If so, a possible solution (which is probably easier on the E36 hubs) would be a third bar, curved slightly and mounted approx horizontally, joining the other two bars and secured in the middle?
Or would this not cure the problem???
Tim
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I think the main problem is that the stays simply aren't stiff enough. Most of the "7" lookalikes use larger section hollow tube which is much stiffer. Marlin tried this but due to the limited options for mounting on the E30 the welds failed. I think larger hollow stays with an alternative mounting arrangement would be the answer...
Robin
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23rd June 2010, 21:34
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Quote:
Originally Posted by Sorton
Peter
Those spacers look just the job and when I eventually get there I would like to get the same make. Can you advise what thicknesses you are using and where you bought them from.
Thanks, Sorton
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Hi Sorton,
the ones I got are 30mm thick because my wheels have a ET35mm offset which really is too much.
I bought my new spacers direct from this company in Germany..
http://www.orange-tuning.de/shop/ind...BP&language=en
If you've not got your wheels yet, you're better going for some with an ET of about ET 25 and then you won't need any spacers at the front and about 20mm spacers at the back (which are easier to find and cheaper).
...peter
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26th June 2010, 10:22
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Quote:
Originally Posted by MartinClan
I have been doing a survey of what other cars (mainly 7 style) use. Most of them use a fairly large diameter (20mm) round section stay which must be a tube or it would be too heavy. The larger the diameter, the stiffer it is. I am sure that's why Marlin temporarily used tubes for our cars - they just didn't take into consideration the weak point where it is welded to the mounting plate. So I reckon the 3rd stay should preferably be a tube for stiffness (and weight).
Robin
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Quote:
Originally Posted by GreatOldOne
Mine vibrate.
I think I posted this in the wrong thread before, but here it is again. My idea for some 'bolt on' attachments for the e30 hub. It would need modifying, but I have no idea how feasible it would be to drill holes in the upright, considering the loads / stresses going through it.
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Quote:
Originally Posted by timbo
Going back to the bobbling wings problem, which I have also pondered, is it at least partially due to the fact that the two stays can twist in relation to each other from the vibration, which is why the wings bobble??
If so, a possible solution (which is probably easier on the E36 hubs) would be a third bar, curved slightly and mounted approx horizontally, joining the other two bars and secured in the middle?
Or would this not cure the problem???
Tim
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Googling (as you do) for other sources of stone protection led me to the locost builders forum and this thread regarding breaking wing stays:
http://locostbuilders.co.uk/viewthre...ibmessage=none
Quote:
My Locost has clamshells but the 2CV special has metal cycle wings (trailer) and book style stays. They used to break regularly, always next to the weld in the heat-affected-zone.
I changed the stays to bent square tube with no welds and no further failures. I used 12.5 mm square 16 gauge box - bugger to bend but worth it in the end
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I don't thing that square box would look right on the sportster, but a similar thing could be done with round tube - form both the upper and lower stay from one long continuous length of tube, and then bolt that onto the "super clamps" we all have now.
Last edited by GreatOldOne; 26th June 2010 at 13:04..
Reason: Adding attachment
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26th June 2010, 11:19
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Peter
Thanks for the link. Low ET wheels seem hard to find but whatever I eventually end up with I now know where to find proper spacers.
Sorton
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20th September 2010, 12:33
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We made a round trip of 300 miles to the Goodwood Revival this weekend. (OK so we made a stopover in a hotel about 2/3rds of the way there).
Sportster ran without any problems other than the airfilter coming loose! And that includes 90mins "parked" on the M25 on the way there - temperature gauge just sat in the middle. Even returned a good MPG!
Goodwood Revival is absolutely amazing! There is so much to see and do it's impossible to fit into 1 day. We went Saturday (also known as Ladies day...) I can't recommend it enough for anyone even vaguely interested in cars, motorsport or even 1960's fashion. Even my wife enjoyed it. I shall be going back next year if at all possible.
Robin
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20th September 2010, 21:10
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Hi Robin,
sounds like you had a good run and weekend out.
But we need some pictures!!!!!
regards
Peter
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21st September 2010, 07:55
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Unfortunately not many pictures. There were so many people there (sell out 64,000) it was very difficult to get any clear shots. Still I have a few - I will post them up at the weekend.
I saw the Alfa's - but they were in a part of the paddock that was VIP's only so wasn't able to get close enough for pictures. They were accompanied by Bugatti's, Maseratti's - just about everything from that era. Literally 100's of millions of pounds worth of machinery in a few 10's of square metres.
Awesome....
Robin
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