| Author |
Message |
unclewede
Samba Member
Joined: May 01, 2015
Posts: 374
Location: Oxnard, CA
|
 Posted: Mon May 03, 2021 11:03 am Post subject: Re: The Stupid Question Thread |
 |
|
| TY |
|
| Back to top |
|
 |
EVfun
Samba Member
Joined: April 01, 2012
Posts: 5475
Location: Seattle
|
| Posted: Tue May 04, 2021 4:10 pm Post subject: Re: The Stupid Question Thread |
|
|
New stupid question... The needle valves used at the inlet of the Weber ICT carb (and shared with some other Weber carbs) are available in different sizes. It seems all the new ICT carbs sold for aircooled VWs come with the 1.75 mm. Some of the replacement ones for the same are even 2.0 mm.
Since these are so sensitive to fuel pressure why not use the smaller and available 1.50 mm needle valve? It should increase the maximum fuel pressure without flooding by about 35%. It is hard to imagine that an engine mild enough for 34 ICT carbs needs more fuel than 2 needle valves each 1.5 mm in size can provide.
_________________
| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
|
|
| Back to top |
|
|
vamram 
Samba Member
Joined: March 08, 2012
Posts: 7300
Location: NOVA
|
| Posted: Sat May 08, 2021 10:26 am Post subject: Re: The Stupid Question Thread |
|
|
Here's a stupid carb question for you. First background - no vacuum leaks, idles fine and steady, 1600DP Bosch DVDA w/a Bocar 34-3, the one w/the dashpot sticking out of the rear.
With no vacuum leaks, engine nicely tuned, valves, timing and carb adjusted, what would make it run lean? Volume screw turned in too far? Or main jet too small?
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!
'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!! |
|
| Back to top |
|
|
EVfun
Samba Member
Joined: April 01, 2012
Posts: 5475
Location: Seattle
|
| Posted: Sat May 08, 2021 12:11 pm Post subject: Re: The Stupid Question Thread |
|
|
| vamram wrote: |
Here's a stupid carb question for you. First background - no vacuum leaks, idles fine and steady, 1600DP Bosch DVDA w/a Bocar 34-3, the one w/the dashpot sticking out of the rear.
With no vacuum leaks, engine nicely tuned, valves, timing and carb adjusted, what would make it run lean? Volume screw turned in too far? Or main jet too small? |
Where in operation is it running lean? Lean idle is handled with the volume screw. Above that point as you start to apply throttle it may point to a idle jet issue. If it is only at higher rpm and greater loads then the main jet circuit is suspect. Each of these ranges has more than 1 possible cause to check.
_________________
| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
|
|
| Back to top |
|
|
vamram
Samba Member
Joined: March 08, 2012
Posts: 7300
Location: NOVA
|
| Posted: Sat May 08, 2021 12:54 pm Post subject: Re: The Stupid Question Thread |
|
|
EVFun, it's more at cruising speed and under load. The volume screw is only to smooth out the idle, and the big idle screw is to raise or lower the idle RPM, right? This has always been a point of confusion for me.
_________________
Eventually, "we are what we pretend to be.’”
Give peace a chance - Stop Russian-Soviet Aggression!!
'74 Super 9/16 - present, in refurb process.
'73 Super - 6/18 - Present - Daily Driver!
'75 Super Le Grande...waiting it's turn in line behind '74.
Click to view image
Save the Supers!! |
|
| Back to top |
|
|
EVfun
Samba Member
Joined: April 01, 2012
Posts: 5475
Location: Seattle
|
| Posted: Sat May 08, 2021 2:42 pm Post subject: Re: The Stupid Question Thread |
|
|
You got the idle screws down. Lean running, light load, is still mostly off the idle jet. As you get on it the carb should smoothly transition fully onto the main circuit and further onto the high speed enrichment system. I don't know anything about the dashpot, so I can't say what it might be doing. A few ideas from what I have seen:
Idle jet really torqued down at some point. It can move enough metal to restrict that circuit.
Aftermarket exhaust. If it breathes well it can lean out the upper ranges.
Plugged, or not getting hot, heat riser. The fuel can partly fall out of its fine atomization. Some it It ends up not getting burnt which acts lean. This is more likely to screw you up off idle, but the troubles it can cause can extend to any engine range. These issues are worse when cool and/or damp and generally minimal in dry hot weather.
Gasoline that is more than E10 (10% ethanol.) Alcohol needs a richer mixture to burn right so too much in your gas results in a lean mix. Even 10% leans it some but these engines have a rich enough mix to forgive that.
All sorts of dirt inside a carb that indicates the need for a cleaning and rebuild. It can cause a wide range of different issues.
Since this is more than a basic PICT-1 carb others can likely provide better specifics.
_________________
| Wildthings wrote: |
| As a general rule, cheap parts are the most expensive parts you can buy. |
|
|
| Back to top |
|
|
solorogue
Samba Member
Joined: April 13, 2021
Posts: 74
Location: Virginia
|
| Posted: Thu May 20, 2021 10:03 am Post subject: Re: The Stupid Question Thread |
|
|
| I can not seem to find the horn on my 74' SB. A lot of posts have said it's under the front left fender and near the bumper by the bumper bracket. Mine is not to be found. Either it was placed somewhere else on the vehicle or I just don't have a horn on the bug. Any ideas where I might physically find my horn? |
|
| Back to top |
|
|
kpf
Samba Member
Joined: March 01, 2017
Posts: 852
Location: California, US
|
| Posted: Thu May 20, 2021 10:53 am Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
| I can not seem to find the horn on my 74' SB. A lot of posts have said it's under the front left fender and near the bumper by the bumper bracket. Mine is not to be found. Either it was placed somewhere else on the vehicle or I just don't have a horn on the bug. Any ideas where I might physically find my horn? |
(pic from TheSamba gallery)
Your description is accurate. Probably if you don't see it there, and it doesn't sound when you push the button, then it is gone.
_________________
1971 Super Beetle |
|
| Back to top |
|
|
solorogue
Samba Member
Joined: April 13, 2021
Posts: 74
Location: Virginia
|
| Posted: Mon May 24, 2021 3:44 pm Post subject: Re: The Stupid Question Thread |
|
|
ok, what is this "25 min pressure" knob/dial under my 74' SB? it's
located on the passenger side under the running boards/rocker panel area. Is this something I need or crucial? I cut one of the tiny black hoses on it when cutting out my passenger floor pan.
|
|
| Back to top |
|
|
kpf
Samba Member
Joined: March 01, 2017
Posts: 852
Location: California, US
|
| Posted: Mon May 24, 2021 3:59 pm Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
| ok, what is this "25 min pressure" knob/dial under my 74' SB? |
That is not a stock item. Maybe follow the hoses to see where they go?
_________________
1971 Super Beetle |
|
| Back to top |
|
|
68IHscout
Samba Member
Joined: March 10, 2010
Posts: 3122
Location: santa ana ca
|
| Posted: Mon May 24, 2021 4:03 pm Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
ok, what is this "25 min pressure" knob/dial under my 74' SB? it's
located on the passenger side under the running boards/rocker panel area. Is this something I need or crucial? I cut one of the tiny black hoses on it when cutting out my passenger floor pan.
|
looks like of a valve for air shocks. |
|
| Back to top |
|
|
mukluk
Samba Member
Joined: October 18, 2012
Posts: 7023
Location: Clyde, TX
|
|
| Back to top |
|
|
solorogue
Samba Member
Joined: April 13, 2021
Posts: 74
Location: Virginia
|
| Posted: Tue May 25, 2021 6:20 am Post subject: Re: The Stupid Question Thread |
|
|
I am not aware the car had air shocks on it. The small black tubes from this gauge/knob do go to the back of the car, not to the front. The Amazon link you shared does not work. I have only been working on the front of the car so far, so I guess once to get to the back I can find out more, but I am going to assume it is ok that I cut one of these lines. as I don't need to be using air shocks... I guess I can just take this dial/gauge off |
|
| Back to top |
|
|
Johnny Dangerously
Samba Member
Joined: April 18, 2021
Posts: 2
Location: VA
|
| Posted: Tue May 25, 2021 8:03 am Post subject: Re: The Stupid Question Thread |
|
|
Can someone please tell me the name of this wire terminal block and if I can buy them new?
|
|
| Back to top |
|
|
kpf
Samba Member
Joined: March 01, 2017
Posts: 852
Location: California, US
|
| Posted: Tue May 25, 2021 8:42 am Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
| The small black tubes from this gauge/knob do go to the back of the car, not to the front. |
Sounds like the air shocks may have been a bandaid for sagging rear suspension.
_________________
1971 Super Beetle |
|
| Back to top |
|
|
mukluk
Samba Member
Joined: October 18, 2012
Posts: 7023
Location: Clyde, TX
|
| Posted: Tue May 25, 2021 11:42 am Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
| I am not aware the car had air shocks on it. The small black tubes from this gauge/knob do go to the back of the car, not to the front. The Amazon link you shared does not work. I have only been working on the front of the car so far, so I guess once to get to the back I can find out more, but I am going to assume it is ok that I cut one of these lines. as I don't need to be using air shocks... I guess I can just take this dial/gauge off |
Not sure why the link doesn't work for you, but it shows the Gabriel 141099 hose accessory kit with the identical hoses and pressure fitting with metal placard like your car has.
Just because your car had air shocks doesn't mean that it still does. If you don't have or want them, then remove the hoses and fitting.
Air shocks were more commonly installed in the rear than the front back in the day. They were used to jack the rear end up to give the car a raked look.
_________________
1960 Ragtop w/Semaphores "Inga" |
|
| Back to top |
|
|
bergfan
Samba Member
Joined: March 07, 2007
Posts: 151
Location: NewZealand
|
| Posted: Tue May 25, 2021 11:56 am Post subject: Re: The Stupid Question Thread |
|
|
| mukluk wrote: |
| solorogue wrote: |
| I am not aware the car had air shocks on it. The small black tubes from this gauge/knob do go to the back of the car, not to the front. The Amazon link you shared does not work. I have only been working on the front of the car so far, so I guess once to get to the back I can find out more, but I am going to assume it is ok that I cut one of these lines. as I don't need to be using air shocks... I guess I can just take this dial/gauge off |
Not sure why the link doesn't work for you, but it shows the Gabriel 141099 hose accessory kit with the identical hoses and pressure fitting with metal placard like your car has.
Just because your car had air shocks doesn't mean that it still does. If you don't have or want them, then remove the
hoses and fitting.
Air shocks were more commonly installed in the rear than the front back in the day. They were used to jack the rear end up to give the car a raked look. |
Super Beetles always seem to sit higher in the front so maybe the PO didn't like that look and put the air shocks in the back |
|
| Back to top |
|
|
VladsVdub
Samba Member
Joined: May 02, 2021
Posts: 11
Location: Lancaster, CA
|
| Posted: Thu May 27, 2021 12:13 pm Post subject: Re: The Stupid Question Thread |
|
|
| Is it possible to power bleed a new master cylinder? |
|
| Back to top |
|
|
solorogue
Samba Member
Joined: April 13, 2021
Posts: 74
Location: Virginia
|
| Posted: Thu May 27, 2021 12:31 pm Post subject: Re: The Stupid Question Thread |
|
|
| You guys are so awesome! So far I have not stumped any of you. I check the back shocks and sure enough .. the PO put on Gabriel HiJackers air shocks on the back. You guys ROCK!! |
|
| Back to top |
|
|
Cusser
Samba Member
Joined: October 02, 2006
Posts: 31361
Location: Hot Arizona
|
| Posted: Thu May 27, 2021 3:03 pm Post subject: Re: The Stupid Question Thread |
|
|
| solorogue wrote: |
| the PO put on Gabriel HiJackers air shocks on the back. You guys ROCK!! |
I have those on the rear of my 1971 Convertible to raise the sagging rear end !!
The Cuss does NOT like saggy rear ends !!!
_________________
1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
|
| Back to top |
|
|
|
