| wcfvw69 |
Thu Jun 23, 2016 3:06 pm |
|
Robert Haas wrote: TheViking wrote: congrats! Really beautifull car!
One question? How is the exhaust system working for you? I cant seem to get mine to stop leaking...
yep, same here. We are probably going to have to cut it up and re-weld it. Luckily I am a very good welder and own a very nice TIG
Just be aware the muffler you have there doesn't provide hardly ANY hot exhaust gas flow through the carb pre-heat manifold. It can be troublesome in the summer but even more so in the winter. A stock VW muffler is designed to flow a lot of hot exhaust gas through that manifold to keep the carb from icing up. It also helps the engine's driveability when it's cold.
Just an FYI :D |
|
| Robert Haas |
Thu Jun 23, 2016 4:43 pm |
|
wcfvw69 wrote: Robert Haas wrote: TheViking wrote: congrats! Really beautifull car!
One question? How is the exhaust system working for you? I cant seem to get mine to stop leaking...
yep, same here. We are probably going to have to cut it up and re-weld it. Luckily I am a very good welder and own a very nice TIG
Just be aware the muffler you have there doesn't provide hardly ANY hot exhaust gas flow through the carb pre-heat manifold. It can be troublesome in the summer but even more so in the winter. A stock VW muffler is designed to flow a lot of hot exhaust gas through that manifold to keep the carb from icing up. It also helps the engine's driveability when it's cold.
Just an FYI :D
The heat risers appear to have the same diam. as the originals, What am I missing? |
|
| wcfvw69 |
Thu Jun 23, 2016 7:16 pm |
|
The stock VW muffler was designed in such a way as to produce a vacuum or low pressure area that pulled the hot exhaust thru the heat risers. This picture of a stock muffler cut away shows this. Headers or mufflers like yours don't have that vacuum or low pressure to pull large volumes of hot exhaust gas through the carb manifold heat risers. As such, they don't get anywhere near hot enough to do what they are suppose to do, keep the carb from icing and helping the fuel stay atomized down those long intake runners.
If you have a laser temperature gun, point it at your heat risers with that current exhaust on it and see what temp it shows. You also need to insure the heat risers are clear and not clogged up with carbon.
This picture from Robbie shows how hot it's suppose to get.
http://www.thesamba.com/vw/forum/viewtopic.php?t=642924&highlight=heat+risers
http://www.thesamba.com/vw/forum/viewtopic.php?t=627243&highlight=heat+risers
Here's a couple of old threads that talks about it.
When I bought my 70 bus, it had a header on it. It was a cold engine pig. It would fall all over itself when first started and take 5 minutes for the driveability to improve. After I pitched the POS header in the garbage, I installed a stock muffler and made sure the heat riser tubes were clear. Night and day difference in cold engine driveability. It improved to perfect when I reinstalled the flaps and thermostat. Now, I can start the dead cold engine and drive right off and it runs perfect. |
|
| Goldbug3318 |
Fri Jun 24, 2016 3:26 pm |
|
GREAT story.....& fabulous car!!!!
Mike |
|
| coxbzh |
Wed Jun 29, 2016 5:20 am |
|
that's a beautiful story
my favorite color, congratulations |
|
Powered by phpBB © 2001, 2005 phpBB Group
|