Dual 30 pict-1

[sled]

bear with me guys as I am not much of an engine guy other than making total stockers run good.

I am kicking around the idea of putting dual 30pict-1s on my 1500 sp. right now it has a single and its one of the best running engines I've had. Don't mess with something if its not broken right? Well I have two extra carbs so I could just put the existing single carb/manifold back on like nothing ever happened if the duals are a dud.

that being said, I am wondering about smaller jets?

I've read that I can solder and ream my own sizes from original jets. Would any of you have suggestions for base line jetting? Its a stock 1500 SP as far as I can tell, although I have not opened it up and it has a rebuilders stamp on the case. Or maybe it would run well with stock jetting?

also, would a balance tube be essential in this application?

I get just as annoyed as the rest of you do with the "how much horsepower?" threads, but I am curious if running duals in this application would actually increase power or would just have a cool factor?

thanks for your time,
jake
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drive your split.

[earthquake]

You can use Mikuni jets in a 30pict and they make them pretty small...
http://www.jetsrus.com/a_jets_by_carburetor_type/jets_mikuni_N100-604_main_Large_round.htm.
Dual carbs should give a few more ponies, even if only 5 HP that's about a 10% increase over stock.

Casey
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74 CLASS 11 LOOK-A-LIKE
69 DUNE BUGGY
79 INTERNATIONAL SCOUT II
05 SCION XB SERIES RELEASE 2[#437]
95 Chevy C3500 dually
98 Ford E150
Link to Kelly J. Nolte 3/20/53 - 11/6/08
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DEATH TO CHINGERS!
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[sled]

thanks for the reply Casey, that link has almost any size I could need!

I wonder how much I should jet down though?
_________________
drive your split.

[Rome]

I hope you pursue the duals!

Have you thought about the intake manifolds? Since the 30-PICT1 carb mounting flange in the stock position sits "front-to-rear", and most single-throat dual carb manifolds have a "side-to-side" carb flange orientation, you have 2 choices. Either make your own manifolds based on two stock 1500 manifolds, or buy a pair of steel manifolds (Weber ICTs, etc), cut and reweld the carb flange 1/4 turn.

I think that after this challenge, the original jets will be very close to optimum. The engine should certainly start and run reasonably well, so that you might end up with jets only a size larger or smaller.

I've thought about this setup myself in the past few years, using a pair of metal type 3 Solex PDSIT manifolds as basis. Those are too short for type 1 application. I'd need to extend them upward and slightly outward so they clear the fan shroud's fresh air outlets. Also would need to slice and rotate the carb flange on them.

As to balance tubes, they were utilized on Kadron, Dell'Orto 34FRD and the Solex PDSIT setups. I have a photo of a friend's 1500 SP which used two Weber 34ICTs. Those manifolds did not have provisions for a balance tube.

[jeffavatech]

Dual 30 pict-1's. The linkage will be a copy of a very early Berg unit.

[sharkskinman]

So?
How are they?
What about type 3 single port intakes?
Ands did type 3 single ports sport 32s?
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[EverettB]

[spencerfvee]