You may think this is dumb

[aeromech]

I have a 1971 bus with a stock engine. I also have a good core and would like to consider building a high displacement engine to swap in. The thing that might sound dumb is that I want this engine to be very plug and play. In other words I don't want dual carbs, external oil system, or anything else that makes it more involved. I don't even want a spin on filter. What I do want is to use a 34PICT-3. So what's the largest engine I can build that will run with a modified Solex carb? I'm hoping to make it up to a 2007cc. I would settle for less.

Guys, I've already been down the road before, several times. This time it's my bus. I want simple. I want driveabilty. I want low end power. I want plug and play. No full flow.

So I'm thinking.

78 crank
90.5 p/c
Engle 100 cam
Stock valves
Tri-Mil exhaust
Solex 34PICT-3 carb
SVDA distributor or maybe DVDA
Deep sump

I just don't know if this carb can be made to run well on this engine. Tim at Volksbitz thinks it might. What say you guys?

Past engines

My current engine

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[esde]

Are you dead set on a stock 34pict3? Or do you just want a stock ish single carb on a stock manifold? Reason for asking is that I just saw someone (sunday at Flanders NJ show) using a single Kadron 40 on his 1915 and he said it worked really well.
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modok wrote:
Bent cranks are silent but gather no moss. I mean, ah, something like that.

[aeromech]

I'd really like to keep the 34pict-3 in slightly modified condition. I've done to Kadron thing before and hated them. Although that was duals.
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Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[modok]

Yeah I do think the deep sump is dumb.

Sounds like a good combo, i agree 1904 being a ideal size to extract the most from stock breathing components. Torben (Alstrup) has built a lot of these, and has good ideas about how to do it. Larger venturi, CB center section, maybe some porting, certainly 90-100 hp is possible.

[aeromech]

[vwracerdave]

CB 2280 "Cheater Cam" is a great match for the stock carb.
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[modok]

I have no input about the bigger cooler; never tried it. I would look for a shroud with the scoop. (some had it some didn't)

It would be nice to have a as-21 case, so, if it runs hot, you can let it run hot. The Germans thought that was a good plan.
Probably will run hotter than if it had dual IDFS.

[Multi69s]

I'm a big fan of the Type 4 cooler mod. I believe that you get a lot of return for the investment. My 2010 Baja always had higher oil temps then I liked. I was going to put an external cooler on it. However, I had a couple of T4 coolers, so I thought I would try one since they are so much bigger. The temps went from very questionable to no worries with the T4 cooler. I know my engine bay is more open, but as long as you have a good air supply to the fan, I think you will like this mod.
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69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
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AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight=

[aeromech]

Cost is a consideration and I already have a case but if it fails inspection I might pop for a brand new case. Good info on the cam. I've always gone with the Engle 100 but that was always with more carburetor. This is something I didn't consider, thanks. I will most likely buy my tin and modified DH shroud from Awesome Powder coating because they do the T4 cooler mod. This isn't something I have money for right now but I wanted your input so I can get a grasp on the project for down the road. Right now my money is going to other things the bus needs first
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[neil68]

[aeromech]

If I was going with duals it would be Dellortos or Webers but not Kads. I just want something simple with a choke. Don't care if I lose some HP because of it.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[Motor7710]

The 34pict 3 is capable of running large engines in the 2.2L range with the right minor mods on the carb.
Best thing about it is that you still got a choke for those cold mornings and not to mention a very torque bottom end.
Here's a silly vid of mine with a 34pict 3 on a 2234cc, but yeah.. Alstrup did help me on this project and his probably your best
bet for advise! Good luck

Link

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If it stopped dripping oil you’re probably out of oil!

[Brian]

[modok]

The engle 100 would act about the same as a 1600 with the CB cheater, since you have so much displacement under a stock head. The idle might be a bit rougher, but it will smooth out soon as you get over 2000 rpm.

[Multi69s]

Actually the T4 cooler mod is pretty easy to do if you have a welder and some sheet metal. Best of all it doesn't show if you mess up a little
_________________
69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
Auto Trans Rebuild http://www.thesamba.com/vw/forum/viewtopic.php?t=516066&highlight=
AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight=

[EVfun]

It looks like there are a number of mild cam choices for different motors where low end power is important. A quick look over at Aircooled.net shows the Eagle 2280, Engle W90 and W100, Scat C20 and C25, and the Web Cam Grind 86 and possibly Grind 110.
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[74 Thing]

Contact Alstrup

[rosevillain]

Engle 100 on 105LC with 1.25 rockers on the intake. Or, maybe a Web 218/119 on 106LC. You are going to need help getting air into this engine.
Buses are geared pretty short, maybe a taller gear or a 15" rim to take advantage of the torque of the long runner/ big displacement so that you don't run out of revs before you get to speed? Doghouse with a Venturi ring. 13/8" 4-in-1 or merged header.

[GTV]

Doesn't sound dumb to me at all. I've also built and enjoyed a few dual carb engines, the idea of mostly stock appearing 1904-ish is starting to gain traction in my mind. Interested to see what you end up with.
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[spencerfvee]

nothing is dumb . when done right .I have run both the cb cheater cam and the engle 100 cam. I find the engle 100 cam works the best . in a heavy car . the cheater cam runs out of power at 4,200 rpm the 100 cam will go to 5,000 rpm and still make power . I am running a engle 100 cam in my bug. with a 1600cc motor with 40 x 35 valve heads ported end castings and a 34 pict carb bocare 135 main jet 60 idle jet stock vw manifold with preheat to the manifold . stock air cleaner gutted I use a K& N air filter . it runs great .it will do 90mph flate out on a free way I shift at 4,500 rpm to 5,000 rpm I get from 20 to 25mpg . in the past I have run a 34pict carb on 2,000cc motor with a 34pict carb. the big motor ran run great go for it spencerfvee