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 Post subject: Dellorto 45s
PostPosted: Sat Jun 09, 2018 11:35 pm 
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Joined: Sun Jul 08, 2012 8:22 pm
Posts: 206
Does anyone know of an easy to understand step by step guide to setting up these carbs on a sprint? Car is running very rough.
Petrol started dripping out of the rear carb today, via the trumpet, then stopped, then started again when engine was running, smelt very rich too.
What pressure should the fuel be?

Chris.


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 Post subject: Re: Dellorto 45s
PostPosted: Mon Jun 11, 2018 1:03 pm 
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Joined: Sun Mar 16, 2008 2:52 pm
Posts: 2303
Hi Chris, I have the Dellortos on the Lotus. Assuming all the jets are clean and the float valve has the correct clearance to the cover ( with the gasket fitted ) and the float valves themselves are good, I use a Gunson's carb; balancer to initially set the throttles ( I do like the clever differential linkage ) then I Colourtune pots 1 and 4; then reset the "suck" at the trumpets.
That seems to work well for me.
Dellorto used to do a very useful booklet on dismantling, re-assembly and setting up . I can't see it listed on their web-site any longer though. The two manuals they still do are about 2/3 the way down on the home page.

https://www.dellorto.co.uk/

I'll have another look for it later.
Tony.


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 Post subject: Re: Dellorto 45s
PostPosted: Mon Jun 11, 2018 6:00 pm 
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Joined: Mon Jan 22, 2007 12:57 am
Posts: 250
Location: Augusta, GA, USA
Hi Chris,

I found this book to be very useful and a very straightforward guide to refurbishing and setting up these carbs.

https://www.amazon.co.uk/Build-Power-De ... r+dellorto

I had the same problem with fuel dripping out of the rear carb when I put them back on a couple of weeks ago after a rebuild. There was an air leak as I hadn't tightened up the mounting to the manifold enough.

I'm running 45DHLAs with a road camshaft (TT10104). I can send you the specs later if it would help. Gives you something to start from.

Andrew


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 Post subject: Re: Dellorto 45s
PostPosted: Mon Jun 11, 2018 6:26 pm 
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Joined: Wed Nov 25, 2009 3:59 pm
Posts: 311
This may help.

https://www.waterstones.com/book/how-to ... 1903706756

_________________
Currently over 35 years worth of fixing 35 boxes.
Hoping to reach 65 years worth of fixing 65 boxes.


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 Post subject: Re: Dellorto 45s
PostPosted: Mon Jun 11, 2018 9:48 pm 
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Joined: Sun Jul 08, 2012 8:22 pm
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Quote:
Hi Chris,

I found this book to be very useful and a very straightforward guide to refurbishing and setting up these carbs.

https://www.amazon.co.uk/Build-Power-De ... r+dellorto

I had the same problem with fuel dripping out of the rear carb when I put them back on a couple of weeks ago after a rebuild. There was an air leak as I hadn't tightened up the mounting to the manifold enough.

I'm running 45DHLAs with a road camshaft (TT10104). I can send you the specs later if it would help. Gives you something to start from.



Andrew
Thanks Andrew, that would be great. I did check the fuel level today in the float chambers, probably a millimetre or so out, but I did notice one carb has 7 gram floats, the other 10 grams.

As far as I know everything is tight, but the back carb had quite an amount of fuel pouring out.

Chris.


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 Post subject: Re: Dellorto 45s
PostPosted: Mon Jun 11, 2018 9:50 pm 
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Joined: Sun Jul 08, 2012 8:22 pm
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Thanks also to you both on the recommendation of the book, on the case.


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