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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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Posted: Fri Feb 21, 2014 4:05 pm Post subject: Which Carb Has Better Fuel Control Off Road? |
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On type 4 engines, do the stock Solex 32-34 PDSIT carburetors have good fuel control when the going gets bumpy? Do they hold their tuning well? How do they compare to Webber IDFs when getting bounced around? _________________ 1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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Dale M. Samba Member
Joined: April 12, 2006 Posts: 20365 Location: Just a tiny bit west of Yosemite Valley
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Posted: Fri Feb 21, 2014 4:17 pm Post subject: |
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pssst!.... If you want best fuel control go EFI.....
Dale _________________ “Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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Glenn Mr. 010
Joined: December 25, 2001 Posts: 76760 Location: Sneaking up behind you
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Posted: Fri Feb 21, 2014 4:18 pm Post subject: |
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Dale M. wrote: |
pssst!.... If you want best fuel control go EFI.....
Dale |
While true, it's not what he asked. _________________ Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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Dale M. Samba Member
Joined: April 12, 2006 Posts: 20365 Location: Just a tiny bit west of Yosemite Valley
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Posted: Fri Feb 21, 2014 4:36 pm Post subject: |
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Glenn wrote: |
Dale M. wrote: |
pssst!.... If you want best fuel control go EFI.....
Dale |
While true, it's not what he asked. |
Maybe going to EFI didn't occur to him, and may be a little suggestion may get him to think outside the carb box.... Might even get him to thinking he does not need a distributor either....
And yes I know, he did not ask about distributors ...
Dale _________________ “Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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jsturtlebuggy Samba Member
Joined: August 24, 2005 Posts: 4496 Location: Fair Oaks/Orangevale, CA
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Posted: Fri Feb 21, 2014 11:38 pm Post subject: |
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The stock carbs will need work, such as external float bowl vents and fixing the throttle shaft bushings which always go bad.
Personally I never liked the way one carb adjusting the idle mixture for both carbs.
Use a set of 36DRLA Dellorto's or 40IDF Webers and install a float bowl vent stack in them.
On both style of carbs can be improved with the use of Jet Doctors that CB sells.
Maybe you don't like using JB Weld to hold the vent tubes in place, FAT Performance does it and has won many off road races with them with out them falling out.
If you really drive in rough conditions then go to dry sump (sucker system) for the carbs. It works extremely well. _________________ Joseph
Fair Oaks/Orangevale, CA
Elrod Motorsports
Motion Tire Motorsports
Having fun with Dune Buggies since 1970
Into Volkswagens since 1960 |
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hooker Samba Member
Joined: October 07, 2004 Posts: 261 Location: Bend, Oregon
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Posted: Sat Feb 22, 2014 9:02 am Post subject: fuel control |
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I have used 36mm dellortos on my 82 westy as well as using them on my sand rails with smaller engines without any mods and they have always worked excellant. Yes, I use the german 009 distributor too. _________________ 2007 NHRA Division 6 Finals Champion air cooled Rabbit P/U rear engine compact/import class, 13.32 sec 1/4 Woodburn, Oregon
Pauter Big Block VW 2610 cc turbo mid engine roadster 9.69 sec @ 147 mph 1/4 PIR Oregon
I spent most my money on women and VW race cars. The rest I wasted. |
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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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Posted: Sun Feb 23, 2014 10:34 pm Post subject: |
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I guess I wonder because I'm looking for a stock type 4, and they came with the dual Solex PDSIT carbs. I like the idf/hpmx carbs for their ease of set up and tunability. I don't know much about the Solex carbs other than the fact that they are definitely more complex, but seem to work really well when set up right.
Still open for opinions on which of the two would have better fuel control off road _________________ 1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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mr_bill Samba Member
Joined: February 19, 2006 Posts: 1008 Location: City of Orange, CA
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Posted: Wed Feb 26, 2014 11:58 am Post subject: |
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34 PICT-3 modified for off-road use...
fuel cut-off removed & plugged, with external bowl vent _________________ see ya' on the trail........
"Mr Bill"
Dos Perros Motorsports
Orange, CA
1972 Class 11x/Stock Bug
'60's era "vintage" Tunnell-Buggy
"...no one here....get's out ALIVE...."
Motor = electric
Engine = internal combustion
www.facebook.com/groups/DosPerrosMotorsports
www.alrchapter132.org
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Brian Samba Moderator
Joined: May 28, 2012 Posts: 8340 Location: Oceanside
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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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Posted: Wed Feb 26, 2014 3:31 pm Post subject: |
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Hu, interesting. I have never heard of anyone putting a 34 PICT 3 on these engines. What makes the PICT 3 modified for off road better than the PDSIT carb if one were to make the same modification?
Also, does anyone sell an intake manifold for this set up? _________________ 1800 Type 4 Berrien 295
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jsturtlebuggy Samba Member
Joined: August 24, 2005 Posts: 4496 Location: Fair Oaks/Orangevale, CA
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Posted: Wed Feb 26, 2014 6:14 pm Post subject: |
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The bolt pattern is different on the two carbs. Not interchangeable with out work.
Anything can be done, it just do you want to spend the time figuring it out and making linkage for it to work. _________________ Joseph
Fair Oaks/Orangevale, CA
Elrod Motorsports
Motion Tire Motorsports
Having fun with Dune Buggies since 1970
Into Volkswagens since 1960 |
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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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Posted: Wed Feb 26, 2014 6:43 pm Post subject: |
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Yeah, it seems like a custom manifold would have to be made... cut and splice a couple pieces together in order to make it work. Sounds like more work than it is worth unless someone can give me me good reason why 34 pict 3 carbs would be better off road than the stock carbs _________________ 1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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Vanapplebomb Samba Member
Joined: November 03, 2010 Posts: 5389 Location: Holland, MI
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Posted: Sun Jul 13, 2014 2:42 pm Post subject: |
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Well, looks like I am going to give the stock 34 PDSIT 2/3 carbs a shot since I already have a set on hand. I will definitely need to replace the throttle shaft bushings as well as all the gaskets and diaphragms.
Appart from extending the float bowl vents, are there any other modifications that I can make to improve the performance of these carbs for a little off road fun? _________________ 1800 Type 4 Berrien 295
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dustymojave Samba Member
Joined: January 07, 2007 Posts: 5802 Location: Lake LA, Mojave Desert, SoCal
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Posted: Sun Jul 20, 2014 2:01 am Post subject: |
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I believe Bill was showing the mods on the 34PICT 3 for reference on what to do to the 34PDSIT. The float bowl vent hoses can be connected to a fuel filter with the other side of the filter open. _________________ Richard
Offroading VW based cars since 1965
Tech Inspection 1963 - 2012 SCCA/SCORE/HDRA/MORE/MDR +
Retired from building Bajas, Fiberglass Buggies and Rails in the Mojave Desert. Also Sprints & Midgets, Dry Lakes, Road Race cars. All types New and Vintage
SoCalBajas Member
Kicked Cancer's A$$...1st and 2nd round...Fight ain't over yet. |
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fishybastard Samba Member
Joined: May 13, 2013 Posts: 269 Location: Holland MI
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Posted: Sun Jul 20, 2014 7:58 am Post subject: |
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I recently went back to the 34 pict 3 on my rail as well. I am liking those mods for off road use! I do not have my choke hooked up. Can I just remove the choke butterfly? What are the advantages of these mods for off road use? |
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Dale M. Samba Member
Joined: April 12, 2006 Posts: 20365 Location: Just a tiny bit west of Yosemite Valley
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Posted: Sun Jul 20, 2014 11:30 am Post subject: |
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One major thing wrong with stock carbs is press in fuel inlet barb... Inlet needs be drilled and taped for thread in barb... Same with early fuel pumps with press in barbs...
Dale _________________ “Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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fishybastard Samba Member
Joined: May 13, 2013 Posts: 269 Location: Holland MI
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Posted: Sun Jul 20, 2014 12:19 pm Post subject: |
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I noticed that garbage press in fitting with no barb as well. Seems a bit sketchy. |
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Brian Samba Moderator
Joined: May 28, 2012 Posts: 8340 Location: Oceanside
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Posted: Sun Jul 20, 2014 12:29 pm Post subject: |
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Dale M. wrote: |
One major thing wrong with stock carbs is press in fuel inlet barb... Inlet needs be drilled and taped for thread in barb... Same with early fuel pumps with press in barbs...
Dale |
Would AN fittings on the stock fuel pump be overkill? _________________ Wash your hands
'69 Bug
'68 Baja Truck
'71 Bug
'68 Camper
Only losers litter |
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Dale M. Samba Member
Joined: April 12, 2006 Posts: 20365 Location: Just a tiny bit west of Yosemite Valley
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Posted: Sun Jul 20, 2014 12:55 pm Post subject: |
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lustig69 wrote: |
Dale M. wrote: |
One major thing wrong with stock carbs is press in fuel inlet barb... Inlet needs be drilled and taped for thread in barb... Same with early fuel pumps with press in barbs...
Dale |
Would AN fittings on the stock fuel pump be overkill? |
Probably when something like this would suffice..
Probably less than $5 at local hardware, its just a matter of getting carb inlet drilled and tapped to proper size without destroying it... Be careful with DIY here, carb top is cast zink or some other "pot metal" and you can easily crack it when screwing in tapered fitting...
Would be better with straight cut thread (and seal washer) than tapered (NPT)... Possibly like inlet fittings for (late) Weber carbs...
Dale _________________ “Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.
"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
============================================================
All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ... |
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