Vacuum diagram

[2_Late_I_Won]

Hey I'm new to the sport of Opeling LOL. My brother bought a 1971 Opel GT. He doesn't have any experience with mechanics and I have a little bit.(I was a light end mechanic for Goodyear and Pepboy's for about 5 years) Anyways I've never been good at carbs. andwhat do you know. Our first problem in fixing this car is (I believe) a carb problem. Fist off it spits raw fuel out of the barrels and gets all over the place.(bad for fuel economy good to start fires) I know there need to be some vacuum hoses some where but I don't know where. It has an electric choke so I'm good w/o hoses there. There are 2 vent opening on the valve cover. So I am assuming one goes to the carb? The car once I get it to start (after lots of attempts) revs and sputters very slowly.

1) So is there away where I can start form scratch. Like close all the needles and open them up to a specific amount of turn to tune the carb?
2) Does anyone have a detailed vacuum diagram? I think that will help alot with the sputtering and slow revving.

Thanks in advance and any info is greatly appreciated. Thanks Brian

[hrcollinsjr]

At risk of stirring up some of the people that think stock is the way to go, toss the Solex and replace it with a 32/36 Weber DGEV. It is much easier to adjust and work on and will usually outperform the Solex in MPG and HP.

JM2CW,
Harold

[namba209]

Brian, there is a search button you can use that will bring up a host of threads on the vacuum lines and where they go. The valve cover connections are peculiar as is the vacuum hook ups on the distributor. It's been too long since I've had an Opel engine in my GT (6 + years) I can't remember where they all go. And welcome to you and your brother to the site and the wonderful world of Opels

[Anonymous D]

Information for connecting vacuum lines on the Weber 32/36 DGV-series carb, is here:

http://www.opelclub.com/TuneUpPart1bJune2006.pdf

This Acrobat file, may require you to reopen your browser to view, and you may have to download a more recent version of Acrobat as well (available for free at www.adobe.com).

It is strongly suggested, that you not try to repair and run an Opel 1.9 with a Solex carb, as they are notorious for requiring multiple repairs. Best first step, is to get the Weber, for reliable performance. (Though, the Solex hose connections, are largely similar to the Weber's in the diagrams)

[baronbors]

Hose #1 from the large opening on the valve cover goes to the intake hole on the air filter plate. Hose #2 goes from the small opening on the valve cover to the intake orifice on the manifold- This is on my Weber- other advice may follow on the Solex. Search the site because it is covered extensively in several threads (prepare for lots of reading)

[2_Late_I_Won]

Originally Posted by namba209 Brian, there is a search button you can use that will bring up a host of threads on the vacuum lines and where they go. The valve cover connections are peculiar as is the vacuum hook ups on the distributor. It's been too long since I've had an Opel engine in my GT (6 + years) I can't remember where they all go. And welcome to you and your brother to the site and the wonderful world of Opels

Thank you and everyone else for the tips. After I tried looking for the diagram and could find exactly what I was looking for. (I was thinking more like a wireing diagram but for vacuum) Although the links you guys have provided are much appreciated and very helpful.
We've though about going to the Weber carb but we didn't really want to spend $200-$300+ on a carb if we could get the one we have to work. But if it really is worth the money I guess we can save up. Unless you know where we can get one cheaper?(hint hint wink wink nudge nudge) This is a budget build for my brother. My brother (Marc) is buying everything and I'm trying to put everything together and try to teach him a thing or two about basic mechanical skills and maintenance. He wanted a car that gets pretty good gas mileage for cheap. So we are trying to cut cost any and everywhere we can. But not to sacrifice reliability,mpg,and of course Hp

So I see the consensus is to dump the solex and get a Weber? How easy of a swap is this carb if we decide to do this? Will I need any extra parts for this to work or is it a direct bolt on?


So again I appreciate the welcoming and plan to stick around for awhile. So a personal thanks to everyone here.

[tekenaar]

Originally Posted by hrcollinsjr At risk of stirring up some of the people that think stock is the way to go, toss the Solex and replace it with a 32/36 Weber DGEV. It is much easier to adjust and work on and will usually outperform the Solex in MPG and HP. JM2CW, Harold

HP, agreed (secondary bore area is 21% larger - 32mm vs. 36mm). MPG at 60-70 MPH steady highway speeds, not true from my experience with either flat tops or dished pistons . . . but then, that's NOT the reason for changing to a Weber in the first place now, is it?!

[2_Late_I_Won]

Originally Posted by 2_Late_I_Won Thank you and everyone else for the tips. After I tried looking for the diagram and could find exactly what I was looking for. (I was thinking more like a wireing diagram but for vacuum) Although the links you guys have provided are much appreciated and very helpful. We've though about going to the Weber carb but we didn't really want to spend $200-$300+ on a carb if we could get the one we have to work. But if it really is worth the money I guess we can save up. Unless you know where we can get one cheaper?(hint hint wink wink nudge nudge) This is a budget build for my brother. My brother (Marc) is buying everything and I'm trying to put everything together and try to teach him a thing or two about basic mechanical skills and maintenance. He wanted a car that gets pretty good gas mileage for cheap. So we are trying to cut cost any and everywhere we can. But not to sacrifice reliability,mpg,and of course Hp So I see the consensus is to dump the solex and get a Weber? How easy of a swap is this carb if we decide to do this? Will I need any extra parts for this to work or is it a direct bolt on? So again I appreciate the welcoming and plan to stick around for awhile. So a personal thanks to everyone here.

do the Weber carbs get better,worse or about the same mpg? Thanks