Solex 31 PICT 3 or Brosol 30/31

[Marl1993ey]

Good Morning Guys,

just wondering what the difference is in these two carbs? 31 PICT 3 and H30/31. i was under the impresson the 31 pict 3 was the correct choice for my 1.3 AB twinport, but my car seems slightly hesitant and "boggy".

Just wondering if there was a preference? i heard the pict 3 is quite tempremental due to circuitary and the 30/31 is a kind of versitile all rounder.

running a 034 vacuum advance if this makes a difference.

Thanks all for your help

[scarabee]

The Solex 31Pict3 is the original carb for a 1300 twin port, whereas the Brosol H30/31 is an aftermarket replacement. The Brosol works fine if you jet it properly. I also have a 1971 1300 twin port with its original Solex 31Pict3.

[Marl1993ey]

@scarabee thank you for the reply, ive read the 31 Pict 3 is slightly more tempremental that the 30/31. do you find this to be the case?

[Cusser]

My only input is that my 1600cc DP engine has the Brosol/Solex 30/31 on it (on the adapter) and I'm happy with it.

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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

[scarabee]

[ashman40]

[BMFBMF]

I did over 200,000 km on my 31 pict 3, until it wore its bushes on the throttle shaft and started to stall at stops. The 30/31 I've had in there for the last 130,000 km has also been doing fine;-), doing a little better since I jetted it properly, but I put it in originally before the internet.
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-----Slava Ukraini-----
1971 Stock South African Beetle 1300 : My mom's european "Thin Chick" spec. Completely stock with torsion bar front, swingaxle rear, smooth hubs, single MC, 40 mm shoes, 31PICT3 carb and 5 bolt drums all round, currently Running a 1976 SF:AS engine with the original SF:AD engine overhauled in a box, waiting to go back in one day.

[Failer]

One caveat that I ran into for putting those on a DP manifold, the adapter that goes between the carb and manifold, it only works with the H30/31. If you try to mount a Solex 30PICT on there, it interferes with the accelerator pump linkage. IDK if you have the exact same arrangement, since my car is an American model but thought I'd mention it.

[Bobs67vwagen]

I had about 6 or 7 30 pict-1s mounted on dual ports with the adapter and I do not recall any problems with the pump linkage. It was more than 15 years ago so maybe I just forgot. I had generators on all those motors, so maybe the problem was with alternators?

[scarabee]

On my 1971 1300DP, the dual port manifold has the smaller flange that doesn't require an adapter for the 31Pict3 or H30/31.

[Marl1993ey]

@scarabee yes mine was a straight swap, 31/3 really running rough. Swapped back to 30/31 and seems to be running alot better especially in the lower rpm range.

still struggling with hard hot start issue but at least i can drive it around with a bit more confidence and less backfiring.

[heimlich]

[glutamodo]

Just saw this.

The 31PICT-3 series was intended for the 1300 twin port. And they all were set up for DVDA or SVDA distributors.

Now the Brosol H30/31PICT largely a clone of the 30PICT-3 used on the 1200 engine from 1971 to late 1974 and is set up like that one was for a vacuum-only distributor, but you can use the angled vacuum port they added at the right rear of the carburetor for ported vacuum used on an SVDA. However it's not exactly a good place to route a distributor vacuum hose over to. The last time I messed with one for testing purposes, I did this to keep it from contacting the throttle arm.

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Andy T.

"What is Glutamodo, Horror of Toyko, besides total, fiendish, quality-a-you brain!"