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  #141  
Old 05-08-2011
Miggers Miggers is offline
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Cheers mate.

I'll look into that dodge.

Now then,I don't suppose you've spare pair of slipper clutch plates
you'd like to donate to the damn thing would you.

Mark
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  #142  
Old 05-08-2011
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adey adey is offline
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no sorry, i used a b4 spur and slipper pads modified to fit with a losi spring. The clutch was very inconsistant in standard form. One thing worth mentioning is that it is possible to use a b4 diff in the standard cobra box. I made some sleeves for the diff halves and modified the standard cobra diff gear to accept a bush so it fitted properly on the b4 diff halves. Not an easy mod though.
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  #143  
Old 05-08-2011
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i no longer have a spare b4 diff but would like to do it again. I should mention that i used the standard cobra diff balls and they were not the best.
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  #144  
Old 07-08-2011
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Quote:
Originally Posted by adey View Post
no sorry, i used a b4 spur and slipper pads modified to fit with a losi spring. The clutch was very inconsistant in standard form. One thing worth mentioning is that it is possible to use a b4 diff in the standard cobra box. I made some sleeves for the diff halves and modified the standard cobra diff gear to accept a bush so it fitted properly on the b4 diff halves. Not an easy mod though.
Well,that's very interesting adey.

You used just the B4 diff halves with the Cobra diff gear then and bushed it
to suit,hmm.

What mods did you do to make the B4 slipper pads and spur fit?,this was
using the standard Cobra slipper plates I take it?.
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  #145  
Old 07-08-2011
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it was far from simple. The outdrive bearings are the wrong size and you have to get some different bearings or fit sleeves over the b4 outdrives and then shim the diff to keep it in place.
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  #146  
Old 07-08-2011
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Quote:
Originally Posted by Welshy40 View Post
Kristians was a looker but no pics. I will have to ask if he still has it, that is if I can find his contact details..
I believe his dad, Lindsay, still has it in his garage.
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  #147  
Old 07-08-2011
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steve poles cobra is one i want to see. I wanted to have a look at his twin deck chassis. Pics of the factory cars would be interesting to see
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  #148  
Old 07-08-2011
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Wink cobra.

steve, when lynsie's fireblade blade breaks down, whats the bet he'll run the cobra...i mean the upgraded pocket rocket.
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  #149  
Old 07-08-2011
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i enquired about a tub chassis from fibrelyte. It was 250 quid because the cost of the mold. They did say that the mold was about 150. I doubt there are any people out there that want a tub chassis for their cobra but if so the price of the mold could be split. I paid 90 quid for my flat carbon chassis with a 25 degree kick.
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  #150  
Old 16-10-2011
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Here's a thought.

Anyone tried fitting an Ansmann Mad Rat/Macnum gearbox internals
into a Cobra gearbox shell?

It all looks virtually indentical to an RC10/Losi 'box,but all the bearings and
shafts are metric instead of imperial plus the parts are much cheaper than
Associated/Losi bits.

http://www.ebay.co.uk/itm/ANSMANN-MA...item48412cbd6f

http://www.ebay.co.uk/itm/ANSMANN-MA...item5d2e30d518

Mark
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  #151  
Old 16-10-2011
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its an idea. I put the rc10 gbox inside the mardave gbox and maybe that could be done using the ansmann gbox. I would like to try and use other diff halves in the standard gearbox myself. The problem for me is that the driveshafts just are not up to the job which is a shame as i enjoy using mine.
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  #152  
Old 16-10-2011
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i will say that i got a diff from a old tq cobra and it was far better than my se diff. I ran it for quite a while with no problems. I would still love to see pics of the team cars from back in the day
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  #153  
Old 17-10-2011
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hi all. I am pretty sure that the rc10b3 and b4 diff will fit into a mardave gearbox. I have made a bush for the main gear to fit on the male diff halve, shaved 0.5mm off the outdrive diameter and used 9mm aluminium sleeves over the outdrives to space the diff in the gearbox and as far as i can see its fine. Will complete the weekend and post pics. Very easy and cheap. Driveshaft issue next on the list.
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  #154  
Old 17-10-2011
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I'm currently running Meteor diff halves on the Cobra diff gear.

The Meteor diff has a locking grub screw on the opposite end of the
diff screw,it doesn't come undone and the diff holds it's adjustment
no matter what.

It's a slipper clutch I'm looking for really to fit the Cobra's top shaft.

I wondered about the Mad Rat 'box because it seems to have a pretty robust diff and a slipper fitted as standard.
The only drawback(as far as I can tell)is that Ansmann only do 80t spurs for it.
If you want to change the spur then you're looking at a modded RC10 B4 slipper and spurs .

Mark
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  #155  
Old 17-10-2011
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heres a pic of the new bush in the diff gear. I tried shaving 0.5mm off the diff halves but without the proper equipment i found it to be a nightmare. I have been chatting to a bearing suppler to try and get a bearing with a internal diameter 0.5mm bigger than standard so i can use b4 diff halves. They are plentyful and not that expensive.
Attached Images
File Type: jpg Diff ring.jpg (227.8 KB, 25 views)
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  #156  
Old 18-10-2011
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heres the finished item. A mardave diff gear and standard cobra se ceramic diff balls with rc10 outdrives, thrust bearing and plates. I have taken 0.5mm from the inner face of the standard mardave outdrive bearings also. It fits perfectly and runs without fault.
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File Type: jpg Cobra hybrid diff.jpg (240.8 KB, 42 views)
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  #157  
Old 18-10-2011
Miggers Miggers is offline
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Good work mate.

It'd probably be easier to take 0.5 from the bearing faces than from the outdrive inner faces,they're rock hard,though if you could have got them in a suitable lathe's chuck you'd have skimmed it off easily.

Not sure about skimming 0.5 from the outdrive bearing seats though,
they'd have probably fractured across the dogbone slots.
It'd be a mare to shim the slots out to support things whilst they were
being machined too.

Do you think you could get a couple of slipper plates turned up for me
at all?
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  #158  
Old 18-10-2011
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i do all my work on the kitchen table with a dremel, file, drill and general tooks. I dont have access to a lathe. If its a clutch for the mardave u want then i have a soloution. I made some ptfe plates for mine. How about some pics of yours
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  #159  
Old 18-10-2011
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It just runs a bog standard Mardave spur at the moment with a 17t
pinion hooked up to a Parma Cyclone Stock 27t.

PTFE plates would work,which spur and pads did you use?
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  #160  
Old 18-10-2011
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i use a b4 spur with ptfe plates cut from a sheet. I also drilled the idler gear and inserted a alloy pin for strength.
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