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Post by valetboy on Sept 23, 2007 19:24:10 GMT 1
hi,
at the moment running a 1293 a + engine with a 5 speed tranex box,also single su 1and half,the problem i have got is that it is flat no real power,there is no problems with the head gasket,new plugs and leads,i havent done anything to the su yet,so can anybody help give me some advice before i go and spend a fortune on other engines or stage kits,
thanks
paul
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Post by acidminis on Sept 23, 2007 22:20:44 GMT 1
Is this going in the Clubman, if so WOW!!! Not very helpful I know, wheres Dai??? Also give the guys at Minisport a call, it may just be the fueling and you need a different needle/jet set up. Phil's sorting out Club discount at Minisport  |
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Post by dai9fxey on Sept 23, 2007 22:36:34 GMT 1
I'm here, don't panic.  As Acid quite rightly says, start by looking at the carb, needle & jet. Do you know what Final Drive ratios you have on the Diff? Are you using a standard cam or something a bit hairier.? Is the Timing correct, IE; is the distributor set up correctly etc.? Your problems could be caused by any of the above and more. It could be something simple. Let's hope so.  |
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Post by valetboy on Sept 24, 2007 16:55:07 GMT 1
hi,i am not sure of the final drive on the diff i will find out although the notes say its a comp diff and bearings and a balanced gear assembly,it has got a lumpy cam [286 blue print,i have no idea what that is ]and the feller who did the restore said that the dissy was possibly the cause to the miss,having tried 2 or 3 eletronic dissys later i still dont know,carbs i havent touched i had to lean it off for the mot but having put it back to where it should be still coughing and splutering up to 35 to 40 mph after this she stops and is ok.knew clutch being fitted tomorrow and then its a case of starting simple and changing a few things maybe going back to good old points !,otherwise u might see me on the side of the road to coombe.
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Post by dai9fxey on Sept 24, 2007 21:05:07 GMT 1
HMMM. A 286 cam is a fairly hot cam, and personally i don't think the carb is big enough. An H6 or 1 and 3/4 SU would be better suited or an HIF 44 SU. It sounds as if there is a fuelling problem.
Is the head modified at all,? There are so many factors to consider it's difficult to pinpoint any single cause of your problem.
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Post by timsmini on Sept 24, 2007 21:51:29 GMT 1
I had the same problem with a 1380, I swapped 1and1/2 su for a 1and3/4 HIF su.
Then got in touch with Mini Spares gave them the engine spec and they sorted a needle. I think it turned out to be a stage one needle.
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Post by dai9fxey on Sept 24, 2007 21:56:38 GMT 1
Right enough Tim. A lightly modified 1275 is usually not a problem for an 1 1/2 su with the right needle / jet.
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Post by valetboy on Sept 24, 2007 22:44:56 GMT 1
thanks for this i will give ebay a look to see what i can find,and ask my local mini club to see if they have any spare 1and3/4 just to see if it makes a difference
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Post by miniandmodels on Sept 30, 2007 23:22:01 GMT 1
What you need is a hiff44 1/34 carb with a BDR needle. Failing that a BBB. That will sort all your problems.
regards jamie@J&L........
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Post by bigend on Oct 1, 2007 8:47:55 GMT 1
...and if you go down the new engine route can I have first dibs on your old one please  |
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