And the next problem is ........
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Post by: Hamish Coutts » Thu Apr 27, 2006 9:32 pm
Rohan & Rob,
You guys mentioned Viton type seated valves and NOS float valves. Maybe I'm just dim but I haven't heard of either. Can you explain a bit more please?
Hamish.
You guys mentioned Viton type seated valves and NOS float valves. Maybe I'm just dim but I haven't heard of either. Can you explain a bit more please?
Hamish.
"One day I'll finish the restoration - honest, darling, just a few more years....."
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Hamish Coutts - Third Gear
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- Joined: 29 Jun 2004
Post by: rgh0 » Fri Apr 28, 2006 1:26 pm
Hamish
According to my Plus 2 manual DHLA 40's can have a persistent flooding problem. Lotus recommended replacing them with the Viton seated float valves from the later DHLA 40 E carbs. Viton is a oil and petrol resistant rubber. These rubber seated valves give a more reliably tight shut off with less force from the foat and thus are less likely to leak and cause flooding. I presume these valves are still available through Delorto suppliers
Rohan
According to my Plus 2 manual DHLA 40's can have a persistent flooding problem. Lotus recommended replacing them with the Viton seated float valves from the later DHLA 40 E carbs. Viton is a oil and petrol resistant rubber. These rubber seated valves give a more reliably tight shut off with less force from the foat and thus are less likely to leak and cause flooding. I presume these valves are still available through Delorto suppliers
Rohan
In God I trust.... All others please bring data
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rgh0 - Coveted Fifth Gear
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Post by: Hamish Coutts » Fri Apr 28, 2006 4:42 pm
Got the little pressure gauge today and did the pressure test as suggested. It was 3.5 psi!! When I returned the regulator to the set up it had when it was first fitted it was 4.5 psi!! Thank you Deamon Tweeks for supplying a regulator set up for Dellortos. Mmmmm. 
Pressure is now a tad below 2psi. There are no drips at the venturi and I got a damned sight further than a ? mile on the test run. No flooding. Yippee!
Rohan (and anybody else who's interested) the Viton seated valves are available from Eurocarbs (do a search for dellorto carbs on google) for a few quid each. They also have loads of spares and do service exchanges.
This problem seems fixed for the moment - here's to the next one!
Thank you all for the advice and encouragement. Chris, I hope your Lotus troubles will be over soon.
It's a bit of a roller coaster owning a Lotus (or is that stating the obvious)?
Pressure is now a tad below 2psi. There are no drips at the venturi and I got a damned sight further than a ? mile on the test run. No flooding. Yippee!
Rohan (and anybody else who's interested) the Viton seated valves are available from Eurocarbs (do a search for dellorto carbs on google) for a few quid each. They also have loads of spares and do service exchanges.
This problem seems fixed for the moment - here's to the next one!
Thank you all for the advice and encouragement. Chris, I hope your Lotus troubles will be over soon.
It's a bit of a roller coaster owning a Lotus (or is that stating the obvious)?
"One day I'll finish the restoration - honest, darling, just a few more years....."
-
Hamish Coutts - Third Gear
- Posts: 498
- Joined: 29 Jun 2004
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