39 PICT 3 from ebay

[DesertSasquatchXploration]

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ttps://www.ebay.com/itm/224784869969

Was reading a older post from 2019 about a 37pict a member bought from ebay. Figured I would give it a go prices are down everyone is looking for sales.

Overall its surprising clean. This one doesn't have the first progression port exposed so that's encouraging. Did find a few brass chips floating around the idle circuit its going to need a complete tear down like all the cheap copy's.
The Venturi is 26mm so it needs to be bored it to at least 30mm. The gaskets are made from card stock so they go right in the trash. But it did come with a 127, 132, 2 137s and a 140 main along with 50,55,60 idle jets. Once a custom intake is made and the carb reworked for 95 bucks its what I expected.
Its uses the 34pict 3 bowl gasket and standard bolt spacing You will have to cut a 34 base gasket bigger of course.

I do make gaskets as a side hustle and have over 100 yards of Fel-Pro material from .015 to .062 thick along with the basic type 1 Gaskets in stock can ship USPS for 4 dollars Just PM me I can do gaskets for any project if you have a gasket I can copy and send you duplicates.

[APPLEGREENVW]

Are you going to sand down the ridge on carb upper part? The stock solex carbs don't have the ridge.
This video has nice info on tuning a 39mm.
https://www.youtube.com/watch?v=fL1BfkRol2o

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Parts for sale https://www.thesamba.com/vw/classifieds/search.php?username=APPLEGREENVW

02/76 Beetle sedan

[NJ John]

Can’t wait to hear how it performs.
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11.41 et buggy. Long gone
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[Alstrup]

Unless you do something radical to the rest of the intake system, not much more than what a 34 will support, if any.
Wrt jetting. Bear in mind that the jetting of the engine in the video can not necessarily be used on the next engine. That engine is semi big and has a semi agressive cam etc. AND 3D programmable ignition.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[Bruce Amacker]

I read chatter on Samba about a 39mm PICT so I thought I'd give it a shot, I know Ebay would refund my money if I wasn't happy. For those not fluent in carbs, that means the venturi is 5mm (almost 1/4") larger than stock, which flows much more air. I bought this and installed it on my '65 bus w/1904 (w/ CB 2280 cheater cam) to replace the 34PICT and it works great, and gives at least 5+ HP, enough to feel. Really surprised at how well it runs, the only minor modification was the fuel inlet was setup for 1/4" hose rather than the 5.5mm that VW uses. It is a no-name Chinese unit with nothing cast into the body at all, it's crazy that a $105 carb works this well!

Most of the adjustments had to be tinkered with, which is expected. It comes with a bunch of different size jets, I thought a 138 would be a good place to start so I pulled the main jet and it had a 138 in it. I've only put about 50 miles on it, but the 1904 loves it!

https://www.ebay.com/itm/184986216721

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'66 Deluxe Bus
'65 Standard Bus
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'65- http://leakoil.net/forum/viewtopic.php?f=23&t=4263

[Lingwendil]

[Alstrup]

I have not seen all models of the chinese 39 Solex. The ones I HAVE seen all have a 28 mm venturi, so 2 mm larger than stock 34 Solex.
Depending on the level of detail to both engine, end castings and air cleaner, such a 1904 engine will gain some midrange torque and a few ponies up top. It will level out around 80 hp. The air cleaner simply can´t supply anymore air

Ling. You ARE sick While possible the dual PSIT thing has no bearing.

Wrt the CB/Empi hi flow center section, yes, it can make a difference, if the enginbe can breathe. The air cleaner is the first point of attention. either a gutted´n modified stock or some sort of decent aftermarket. Then the center section, then the end castings. For a street engine set up (No desert race and the likes) anything above approx 88 hp requires modification of the end castings. anythings possible within reason, but my take is that anything above 1800 cc benefits from the CB end casting.
Slapping a 37 or 39 mm carb on a CB manifold along with modified end castings can give you some 10 nm more torque over a stock 34 w. 28 mm venturi. Dependant on engine and combo you can go up to about 120 hp without too much trouble. From roughly 1900 cc & up it becomes interesting to look at a larger center section. (I´m working on that. Wensing already has a 39 mm I.D. center section available, but it is too large fr medium size engines (IMHO) Mine will be approx 36 mm I.D. to suit medium size engines with both 37 & 39 mm carbs better.) Then 120ish hp is possible. Still with almost stocklike idle around 900 rpm on say a 2109/2165 cc engine. My 2165 stocker plus bus engines typically pull 115-120 hp and around 190 Nm torque. - I built a prototype last year to sort of see how far I could go and what it would pull (bus engine potential and still 2165 displacement) I got to 130 hp and 210 Nm torque, still with very nice idle @ 875-900, but the last 10% power is too expensive unless you absolutely want.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[Lingwendil]

[DesertSasquatchXploration]

I have already port matched the end castings and opened the inlets to 1.400
Put them back on with my 34pict and stock center section Im currently running.

Using a AFR gauge it needed more accl pump (picked up a flat spot) and at WOT I went from a 130 main to a 135.

My end castings had a .080 difference on the inlet side so clearly they were made at different times or is that normal? That was really killing power.

Its a 1776 with stock heads 3 angle valve job 100 cam trimill exhaust and a custom high flow air cleaner so once I do a high flow center section and the 39pict it should be a sweet little motor.

[chrisflstf]

Its too bad there isnt more methods to improve flow in the end castings. Im guessing 10 to 15% should be not too hard to do.

I would be happy to pay someone to do a little work on mine. Booger cleanup is about all I found so far. The CB pieces are huge, too big unless you have a bigger motor and 44 or 48 weber or similiar, maybe 40

[DesertSasquatchXploration]

Extrude hone porting

Nothing New but you gotta pay to play $$$

[Alstrup]

[jimmyhoffa]

The Guido Wensing end castings are the real deal, I have had a very good experience with mine with my Single IDF setup I use sometimes. Noticeably better fuel distribution to each cylinder as well, at idle and lower loads.
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1974 Chenowth 2RL #1244 Street Legal
My other car isn't ridiculous.

[DesertSasquatchXploration]

The only way I would even consider the HiFlow CB intake is if they let me do the carb mounting holes myself. I understand its drilled for 30 and 34 pict but yikes! Looks like they had a liquid lunch, To get burs that bad the drill is beyond dull.

But its not built for the 39pict anyway.

[Alstrup]

[DesertSasquatchXploration]

If I were to build a new intake to take advantage of the improved end castings using my 34pict and open the Venturi to 28MM.

The most common 16 gauge tube sizes found here in the states I can get easily are...

1 3/8 OD = 31.7 to 32mm ID (stock)

1 1/2 OD = 35mm ID

1 5/8 OD = 38mm ID

1 3/4 OD = 41.2mm ID

Using 1 1/2 OD for both parts looks like the best approach from what you are saying or is it crucial to maintain 34MM down to the horizontal connection?

[Alstrup]

Even though it may sound right a 1½" tubing will be too much for a 1776 displacement. 32 mm works greeat. Also, there are a couple of distribution improvements built into the CB/Empi one, and one restriction (when looking at it for a 37/39 carb bore.)
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[DesertSasquatchXploration]

Ok well im quite surprised with the improvement after the port matching and inlet cleanup on the end castings. CB is out of stock on the manifold I can hunt one down used. Should I open the stock 34pict venturi to 28mm or leave it alone?
I have a lathe so that's no trouble but its hard to put the material back on.

[chrisflstf]

The CB Center section is exactly 32mm ID for the horiz runs. It, to my understanding has improved flow due to the inverted Y in the center.

[Jubilee Kafer 1985]

With the 39mm carb, with a larger diameter intake manifold.
What would be the ballpark upper limit of engine cc, using a GTV single spring head ?

Thanks
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