Carb fit..

[ecohen2]

I just want to double check, this carb on ebay:
http://cgi.ebay.com/ebaymotors/Lancia-Intake-Manifold-and-Nearly-New-WEber-34-DAT-Carb_W0QQcmdZViewItemQQcategoryZ33550QQihZ011QQite mZ320147415128QQrdZ1QQsspagenameZWDVW
is a direct bolt on to a stock Scorpion manifold right?

Thanks,
Ed

[cthargiss]

yes it will bolt straight on, BUT , it will not perform very well if you have a dual plane manifold. Use the single plane that it comes with. Also you need very carefull and precise adjustment of the throttle linkage and cable slack in order to get full throttle, as the throttle arm on the 34 is longer than on the 28/32. properly insalled the 34 gives a noticable improvement in power and throttle response.
Craig

[Jim Fierst]

I have one of the 34DATR carbs on my 79 2L LBZ and really like it. Another good thing is that you can get all the jetts you need from Veloce1750 on Ebay at very reasonable prices and fast shipping from Germany.

[SubGothius]

Yes, the Weber DxTx family (DMTR, DAT, DATR, DATRA) are all correct for any Beta engine (or X1/9 and 128, for that matter). There are minor variations in the fuel supply/return barbs -- FWD Beta ones should preferably point downwards in front vs. X1/9s pointing straight out forwards -- but I don't think these are significant enough to preclude Beta installation (not sure if Scorps have any preference/limitation here?).

I am not sure if the manifold supplied would be proper for a Scorpion (is the engine slant the same as a FWD Beta, or any firewall clearance issues?), but IIRC the the 1800-style manny on offer should be similar to, or perhaps even exactly the same as, your stock 1800 Scorp manny, so you'd wind up with a spare manny (which I'd be willing to relieve you of! ;D ).

AFAIK, all 1800-style mannys are single-plane (i.e., all 4 runners individually fed from a large, common plenum) and fairly free-breathing with short, direct runners, rather than the dual-plane design (i.e., small plenum feeds into two separate branches, which then fork into 2 runners each) of the US-spec carb'd 2-liter manifolds. BTW, of the latter (at least mine), get this: the primary barrel feeds down into an elbow that sweeps forward into the plenum under the secondary barrel, from which point the intake charge sweeps out to the sides and then back to those last 2 forks, into the head -- talk about convoluted! :o

This is why I'd like an 1800 manny for my 2L carb'd '79 LBZ -- not only does it have that stock dual-plane manny, the base where the carb mounts up has individual holes of exactly 30 and 32mm, so it's pointless to simply swap in any carb bigger than the stock 30/32DHTA! I'm not sure if this restriction is true of all 2L dual-plane carb mannys, or if that was a special "feature" for the CA-spec emissions kit, but regardless... it's lame! ::)

Count yourself lucky that your 1800 manny can accept a simple carb swap! 8)

[Will]

EGR and plumbing aren't set up the same but that shouldn't matter to you, Ed- Tye's comment about the fuel barbs being in different directions warrants my adding that you should IMO rip out the fuel barb if you can and tap and thread in a real one. The stockers are often either just press-fit, or attached witrh some sort of glue that dissolves over time, I don't know which but they can come loose for no apparent reason. Evidently nobody at Weber seems too concerned about this but the prospect of the fuel line coming off and hosing the engine compartment down with fuel is BULLSHIT in my book!

[ecohen2]

Hey Will,

I actually experienced that exact thing in 1979 out on the farms in Illinois in a friend of mines Scorpion. We were going about 80 and I said "Hey Don, what is all that smoke?" I turned around and could see flames coming out of the grill in the back. He pulled over and fortunately had a fire exstinguisher to put out the fire. The car was in the shop for about 2 months afterward getting new wiring and paint.

My thought was to mount that carb directly on the stock manifold.

Ed

[SubGothius]

My thought was to mount that carb directly on the stock manifold.

That orta work just fine, and whatever air filter topper you've already got should fit fine as well. 8) As long as I get dibs on the leftover manny. ;D