Jump to content

datusn dolphin 1978 620 carburetor weber conversion automatic choke and smog control


dolphin

Recommended Posts

I don't know if any of you remember, but I bought a dolphin camper, 1978 and just finished a weber conversion, I also have a hitachi carb and air cleaner for sale or trade, or...? 

I'm trying to figure out how to hook up an automatic choke, and is it even necessary?   how hard is a cold start in this, and which wire do I hook up?

there are about a zillion different hoses and such, to try and hook up, not even sure where and/or how?

I hooked up the line off the valve cover with a hose to the smog gizmo on the engine, that is run by a belt, but I'm thinking of cutting that belt and getting rid of that, if it helps the air, then I'll leave it on, I'm registered as a vintage vehicle, so I can skip that, but salt lake city is the seventh smoggiest city in the USA, so....I don't want to contribute to that.  I plugged another pipe with a bolt. 

I'll try to post a video on ebay, and let you folks know about the conversion, sorry, I should have done before and after.  Same title

thanks to all

more to come

lewisg

(at)

xmission

dot.

com

Link to comment
  • Replies 10
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

I would cut the bottom off the stock air filter and make an adapter to fit the weber. This will let you get to keep the ATC (air temp control) and the warmed air from the exhaust manifold. Essential for preventing carburetor icing below 35F.

 

There are two wires to the back of the stock carb. The Blue wire is the power for the electric choke. Connect this to the weber'sa electric choke.

  • Like 1
Link to comment

You hooked the valve cover breather to the air pump?

 

That'll make it smoke if it was the inlet to the air pump!  It'll pull oil right out of the engine and pump in straight into the exhaust!

 

The valve cover breather is supposed to go to the air cleaner.  Weber kits don't come with a hose for that, so you'd have to come up with something.  Or run a filter on the valve cover elbow- it's an INLET.  Or at least it's supposed to be.

 

There shouldn't have been anything to move with the air pump, except the anti-backfire valve's connection to the air cleaner.

 

 

If you don't hook up the automatic choke, it'll be "ON" all the time, resulting in a way rich condition.  You just use the original choke wire.

  • Like 1
Link to comment

'Redline' makes this adapter that allows using stock 620 air cleaner on the 32/36 carby. get it from Redline, Pierce Manifolds, Ebay, or wherever fine Weber products are sold. I've a carb and this adapter, as I want the stock cleaner, but haven't installed on the 78 'Longbed' yet. i have a jetted-down 32/36 Weber on the 1200cc in the 320 and love it. Here's the adapter:

 

Weber-620_Air_Filter_Adapter.jpg

Link to comment

For best results, use only the 'Real' Spanish manufactured Weber. It'll have 'Made in Spain' cast into the carb body casting. 

 

I've also been led to beileve that the real Webers with elec. choke will have a white choke heater element housing.

 

The knock-off carbs will have a black housing ??

Link to comment

Carb icing can happen to any carb that sees below 35 and high humidity. Not every time but under certain conditions. I find snow on the ground melting and fog is worst. (I'm at sea level, higher may be worse?) The carb body is super cooled below freezing by the evaporation of gas. Frost forms all over the venturi like the inside of your freezer and it stops working. There is a loss of power and your foot goes further towards the floor until you can't drive. You pull over, but it idles just fine.(different circuit) Warm air under the hood can melt the frost in a few minutes and you drive maybe a half mile and it repeats.

Link to comment

Living in MN, I've never experienced carb icing.  Weber floats are always set wrong, and that affects how the vehicle runs more than any other adjustment.  

 

All Webers are NOT created equal.  As far as I know, Pierce is the only importer selling real Webers these days.  Redline is one of the biggest offenders for selling the Chinese knock-offs, despite the castings appearing nearly identical.  When you see the overly-shiny zinc plated garbage that Webercarbsdirect or EMPI sells, run like hell!!!  Pure awful.  Does it work?  Maybe, but nowhere near ideal.  

Link to comment
  • 5 years later...

Hey man I think I bought your dolphin, based in SLC, registered as a vintage vehicle, bunch of the egr and pvc system plugged/removed. Whoever owned it in between us absolutely destroyed the interior lol, reeks of weed. I'm currently in the process of trying to get it to pass emissions, idk if the laws changed or if maybe you were in a grey area but now the DMV will not let you register an RV as vintage in utah if you plan on using it as an RV, I could have probably just winked, nodded, and pinky promised that it would not ever be used as a camper but oh well, like you said smog here is pretty bad so I don't think the emissions requirements are a bad thing

317933328_689907602694209_569542883560714252_n.jpg

  • Like 2
Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.