I have a 1600DP Rail with a 34 PICT-3 Solex that runs well. The previous owner threw in a Weber 32/36 DGAW 33M Progressive that he had not tried yet. It is missing the intake manifold. Is the performance increase with the Weber worth the trouble of picking up a manifold, putting it on, and getting it dialed in?

some people talk bad about the progressive , i love mine dialed it in and it ripps it compared to a solex !

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Theirs no replacement for displacement !

If you can get a free or cheap progressive intake with preheat give it a try. I don't like/use them because they don't have good bowl vents and worse still almost anything you do to it requires removing it. If your going to push the rail hard in rough terrain the stock carb works best. If I had to spend the cash for a new intake I would split the case and install an Engle W 100 style camshaft instead. If your going to try the progressive
If your going to try using the progressive here are some links with good set up information and diagrams all explained better than I can.
http://www.redlineweber.com/html/Tech/c ... _best_.htm

http://www.redlineweber.com/html/Tech/3 ... akdown.htm

http://www.theautoist.com/weber_carb.htm

http://vw.zenseeker.net/WeberProgressive.htm

Well, thats one in favor, one against. Anyone else have any experience here.

if you are running a stock 1600 the solex will do the job just fine,you are not going to get that much more for the money on a stock motor.imo.chad

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NOW GAS IT!!!!!

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With a set of well tuned 40 IDFs 0r 36 mm Dells the gain is 5 HP. While 10% increase is impressive one gives up fuel control for offroading. More useable power gain is attained by installing an Engle W 100 cam and keeping the stock carb.

Thanks for the input. I believe my 1600DP has a stock cam but can't be sure. The solex has been rejetted. Looks like I'll wait until I have to tear into my motor to boost my power with a hotter cam, rockers and larger pistons.

With a degreed crank pulley and a dial indicator you can check the camshafts duration and lift in the engine. The beauty of the W 100 cam is even if you go to 90.5 or 92 mm pistons you can still keep your stock heads, rockers and valve springs. At this point a progressive, larger single or duals makes a big difference but the 34 pict still works. I used a Webber 91 cam which is similar to the 100 cam installed in one of my mechanics stock 1970 Beetle with a stock 1600, modified with a rejetted 34 pict carb, Monza exhaust, the 91 cam, dual valve springs and 1.25 rockers the Beetle would top out at 100 mph. Even the Webber 76 (similar to the CB 2231 cam) added 5 mph to each gear of a stone stock 1600 engine. Once you make the leap to 90.5 , 92 or 94 mm pistons, making the leap a little bigger by stepping up to better heads like Steve Tims Stage One heads ($590 a pair including setting up the springs to the cam and port matching your intakes), lightened flywheel, a VZ 14 or FK 41 cam and single or dual IDFs are in order. The 100 cam makes bottom end torque the VZ 14 and FK 41 cams makes bottom end torque with attitude. While not cheap another simple, low maintanence, low rpm, high torque combo is a 90x94 engine with stock weight flywheel, Stage One heads, single 44 Webber or dual Weber 40s and a W 100 cam. Most of the time you can leave in 4th gear and drive it like an automatic.

The progressive is great on a 1600. Way better than that solex. IMO