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sled Samba Member
Joined: February 16, 2005 Posts: 6179
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Posted: Sat Aug 09, 2014 5:51 pm Post subject: Dual 30 pict-1 |
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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 _________________ drive your split. |
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earthquake Samba Member
Joined: January 10, 2008 Posts: 3984 Location: SANDY VALLEY, NEVADA
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sled Samba Member
Joined: February 16, 2005 Posts: 6179
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Posted: Mon Aug 11, 2014 9:02 am Post subject: |
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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. |
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Rome Samba Member
Joined: June 02, 2004 Posts: 9640 Location: Pearl River, NY
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Posted: Mon Aug 11, 2014 5:48 pm Post subject: |
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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. |
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jeffavatech Samba Member
Joined: March 01, 2009 Posts: 141 Location: Titusville, Florida
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Posted: Fri Apr 03, 2015 6:34 am Post subject: Here is my dual set-up. |
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Dual 30 pict-1's. The linkage will be a copy of a very early Berg unit.
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sharkskinman Lateral Lunatic
Joined: April 26, 2006 Posts: 4030 Location: Deep In My Own Psyche
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Posted: Thu May 07, 2015 10:06 pm Post subject: |
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So?
How are they?
What about type 3 single port intakes?
Ands did type 3 single ports sport 32s? _________________ 74 Mexi Swamp Thing. 70 square volksrod (Swamp Rat)..65 C10
Me of Course wrote: |
Extremity is relative to how far your willing to jump |
Ward Cleaver wrote: |
You ever try a pink golf ball, Wally? Why, the wind shear alone on a pink golf ball can take the head off a 90-pound midget at over 300 yards |
PS4 "NKOGNEATO" |
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EverettB Administrator
Joined: April 11, 2000 Posts: 69802 Location: Phoenix Metro
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spencerfvee Samba Member
Joined: August 19, 2004 Posts: 3071
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Posted: Sun May 10, 2015 3:47 pm Post subject: Re: Dual 30 pict-1 |
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sled wrote: |
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 |
years ago. I ran a vanguard dual carbs set up on my 1968 bug . and in the vanguard dual carb kit they had 130 main jets .I now have a big bore 40 hp motor with a mild cam and with a vanguard dual carb set up. on my vintage formula vee race car and I am using dual 30 carbs jetted with 130 mains. it runs and sounds great what works for me might not work for your motor. I allway test out the motor with different jets and use the main jets that work the best on my motor .every motor is different when it comes to jet size good luck
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