v8ade
Part of things
Posts: 947
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Feb 15, 2006 22:35:48 GMT
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couple off questions 1 where is the best place to get spare parts for these carbs ? it needs a new diaphram on the bottom as its leaking. 2 I think they need balancing tuning or somthing any good sites around with any info that might help please? 3 any ideas on what degree the timing should be set at on a 2.3 lotus twin cam ie:- the one that was fitted into vauxhalls and leans like the old slant 4.
Also some t**t reversed into the sports hatch on tesco car park the other night i'd like to catch them grrrrrr luckily its only put a small kink in the bumper and back valance
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V8 on open headers at full throttle "Heaven"
Jaguar xf SportBrake rover 820 Turbo vitesse
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Feb 15, 2006 22:56:37 GMT
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I got my rebuild kits from ebay. £20 for two kits iirc.
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street
Posted a lot
6.2 ft/lbs of talk
Posts: 4,662
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Feb 15, 2006 23:43:49 GMT
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Yeah i too got my rebuild kits from ebay! Good quality, even though they come in an italian fuel filter box! With regards to a good source of info- I found there wasnt many websites that gave very clear instructions, but 'How to rebuild and power tune webber and dellorto carbs' by Des Hammill turned out to be a really good investment, very informative. www.amazon.com seemed to be cheapest for that
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I expect the twink needs similar timing to a crossflow as it's basically very similar gewometry so you can try 12 to 16 degrees before top dead centre for static timing. Actual timing will depend on your carbs, headwork, cam and distributor advance.
Carb balancing is easy peasy. Get a synchrometer which is a little device that you bung in the carb trumpet or barrel to measure the flow through the carb. It'll cost about £50 from Burton etc but it's money well spent when you can just check the carbs whenever.
You always use the front carb to set the idle speed and adjust the back ones in sequence to match the front one. First set the idle speed so it's idling very fast and smooth. Start with the front trumpet of the front carb and take a measurement off the synchrometer. Now move to the front trumpet on the second carb and take another synchrometer measurement. Now you can see the difference between the two you can turn the screw on the bar between the two carbs to increase or decrease the flow to the second carb. You basically repeat this method two or three times until the flow through the two carbs is identical, then you can set the idle speed properly.
For the idle mixture between the two carbs just make sure all four screws are adjusted by the same amount, there is a base point which I think is 2.5 turns open from the closed position and you rich up the idle to smooth it out and stop the spitting.
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Last Edit: Feb 16, 2006 8:57:19 GMT by Deleted
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