F.A.Q.    Register    Login    Home Members    Search

Toymods » Tech & Conversions » carburettor experts wanted Show: Today's Posts  :: Show Polls  Email to friend

Author	Topic
earlyrolla Regular Location: Perth Registered: May 2003	Re: carburettor experts wanted Wed, 28 July 2004 13:03 Have you done a compression test yet? Tried pulling off No. 2 lead at idle to see if the RPM drops (becareful doing this). If it is only No. 2 then it will be rings, burnt valve(s) or incorrect valve clearances. If it No. 2 and an adjacent cylinder then it will more than likely be a head gasket. One of the causes of the stumble when you suddenly open the throttle is a momentary loss of vacuum. This is very noticeable with the side draughts due to the 4 throttle butterflies and a small intake manifold volume. The sudden drop in vacuum causes the dissy to immediately retard (something you dont want under acceleration). Once the motor picks up, the vacuum picks up and away you go. I got around this problem to some extent by fitting a restrictor in the vacuum line between the manifold and the dissy. I used a small length of brass tube, soldered over one end and drilled a very very fine hole through the solder. Then cut the vacuum line and fitted in the tube. This has the effect of slowing done the rate of change of the vacuum advance under sudden throttle changes (adds hystersis) but wont affect normal operation. My accelerator pump linkages are in the bottom split pin hole (gives the most travel = the most fuel enrichment). To set up the side draughts, properly balanced, you should use a proper vacuum gauge designed for doing so (it is different to normal vacuum gauges, it is a plate like device that sits over the end of the throat of the carb). Hope this helpful. [Report message to a moderator]

	Subject	Poster	Date
	carburettor experts wanted	Mr DOHC	Mon, 26 July 2004 08:45
	Re: carburettor experts wanted	people100	Mon, 26 July 2004 08:59
	Re: carburettor experts wanted	Dabbid	Mon, 26 July 2004 10:46
	Re: carburettor experts wanted	Mr DOHC	Mon, 26 July 2004 11:30
	Re: carburettor experts wanted	Dabbid	Mon, 26 July 2004 11:37
	Re: carburettor experts wanted	Mr DOHC	Mon, 26 July 2004 11:42
	Re: carburettor experts wanted	mrshin	Mon, 26 July 2004 13:29
	Re: carburettor experts wanted	SIKTA22	Mon, 26 July 2004 15:26
	Re: carburettor experts wanted	joecoolmk2	Mon, 26 July 2004 23:41
	Re: carburettor experts wanted	Mr DOHC	Wed, 28 July 2004 08:42
	Re: carburettor experts wanted	earlyrolla	Wed, 28 July 2004 13:03
	Re: carburettor experts wanted	Mr DOHC	Fri, 30 July 2004 08:46
	Re: carburettor experts wanted	TA-022	Fri, 30 July 2004 09:12
	Re: carburettor experts wanted	joecoolmk2	Fri, 30 July 2004 12:43
	Re: carburettor experts wanted	TA-022	Mon, 02 August 2004 07:57
	Re: carburettor experts wanted	joecoolmk2	Mon, 02 August 2004 08:46
	Re: carburettor experts wanted	TA-022	Mon, 02 August 2004 09:15
	Re: carburettor experts wanted	M.W.P.	Mon, 02 August 2004 09:20
	Re: carburettor experts wanted	TA-022	Mon, 02 August 2004 09:42
	Re: carburettor experts wanted	joecoolmk2	Mon, 02 August 2004 09:51

Previous Topic:	dash difference
Next Topic:	FWD Conversion to RWD

Powered by: FUDforum 2.3.8
Copyright ©2001-2003 Advanced Internet Designs Inc.