|
|
| Author |
Message |
Rex Baker
4 BBL ''Hyper-Pak''
Joined: 23 Feb 2012
Posts: 31
Location: Pendleton
|
|
Post subject:
super six vs home made 2bbl intake
(Fri Mar 02, 2012 10:02 am)
|
 |
|
|
Dan sent me an article that showed how to convert a 1bbl, to a 2bbl, manifold. I like it in the orientation & appears it would allow me to use stock throttle/kickdown setup. I don't know how it flows compared to a regular super six. A friend of mine has (well, now I have it) a very nice 2bbl off of a 1966 273 & I think I'm just going to go ahead & put the 2bbl on, for now. It looks pretty much like the 318 2bbl but no holes in the blades & amazingly, a tight throttle shaft.
So which manifold works better, performance/economy/mixture wise or is there enough difference to matter? Thank you!
_________________
Sport Fury
|
|
| Back to top |
|
SlantSixDan
Board Sponsor & Contributor
Joined: 31 Oct 2002
Posts: 21883
Location: North America
|
|
Post subject:
(Fri Mar 02, 2012 10:27 am)
|
|
|
|
Flow's about the same whether carb is rotated 90° this way or 90° that way. Mixture distribution is potentially more even with the parallel design, but is adequately even with the factory perpendicular design. '66 273 carb should work fine!_________________ 一期一会
By birth & parentage: US citizen, 2nd class
By choice: Canadian citizen, 1st class
 |
|
| Back to top |
|
Rex Baker
4 BBL ''Hyper-Pak''
Joined: 23 Feb 2012
Posts: 31
Location: Pendleton
|
|
Post subject:
(Fri Mar 02, 2012 5:11 pm)
|
|
|
|
| SlantSixDan wrote: | | Flow's about the same whether carb is rotated 90° this way or 90° that way. Mixture distribution is potentially more even with the parallel design, but is adequately even with the factory perpendicular design. '66 273 carb should work fine! |
So, six (Ironic, huh?)  of one, half-dozen of the other, huh? Well, since I already have the super manifold, I'll just go with that & fab some linkage. Thank you!
|
|
| Back to top |
|
SlantSixDan
Board Sponsor & Contributor
Joined: 31 Oct 2002
Posts: 21883
Location: North America
|
|
Post subject:
(Fri Mar 02, 2012 10:22 pm)
|
|
|
|
Shirley. Depending on which carburetor you've got, you may need to file down/saw off some extra metal from the intake manifold to clear the throttle lever. The Stromberg WW3 throttle lever sometimes hits an unnecessary corner of the intake manifold casting; the BBD doesn't. Other than that (and some choke headaches with the WW3) either carb should work well for you in good condition._________________ 一期一会
By birth & parentage: US citizen, 2nd class
By choice: Canadian citizen, 1st class
|
|
| Back to top |
|
Brussell
EFI Slant 6
Joined: 23 May 2010
Posts: 452
|
|
Post subject:
(Sat Mar 03, 2012 12:46 am)
|
|
|
|
| I changed me 1bbl to a 2bbl, have the two barrels running parallel to the engine (If that makes sense). Haven't noticed any issues, plugs are the same colors. Can't hear anything funny. Did have to shave a little off the linkage to make it clear the manifold as said above. Goodluck!
|
|
| Back to top |
|
ratrodster
2 BBL ''SuperSix''
Joined: 02 Mar 2012
Posts: 22
Location: New Brunswick, Canada
|
|
Post subject:
(Sun Mar 04, 2012 5:37 am)
|
|
|
|
have you guys used the pierce manifolds adaptor ? they have that 1 bbl to 2 bbl adaptor plate for about 69 bucks. i am considering using this adaptor to go from 1 bbl to 2 bbl as part of my upgrade ?
any comments guys ?
thanks
|
|
| Back to top |
|
Charrlie_S
SL6 Racer & Moderator
Joined: 19 Oct 2002
Posts: 6096
Location: Silver Springs, Fl.
|
|
Post subject:
(Sun Mar 04, 2012 5:53 am)
|
|
|
|
| Most adapters that mount a larger carb on a smaller manifold are not worth buying. The manifold is the "choke" point.
_________________
Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Cuda 170 nitrous
66 Valiant Signet 225 nitrous
64 Valiant Signet
64 Valiant 4dr 170
|
|
| Back to top |
|
ratrodster
2 BBL ''SuperSix''
Joined: 02 Mar 2012
Posts: 22
Location: New Brunswick, Canada
|
|
Post subject:
(Sun Mar 04, 2012 6:01 am)
|
|
|
|
have you guys used the pierce manifolds adaptor ? they have that 1 bbl to 2 bbl adaptor plate for about 69 bucks. i am considering using this adaptor to go from 1 bbl to 2 bbl as part of my upgrade ?
any comments guys ?
thanks
|
|
| Back to top |
|
ratrodster
2 BBL ''SuperSix''
Joined: 02 Mar 2012
Posts: 22
Location: New Brunswick, Canada
|
|
Post subject:
(Sun Mar 04, 2012 6:05 am)
|
|
|
|
i have a 1975 dart . it has the stock intake and exhaust man's with 1 bbl carb.
my question i guess is , what is the difference between the intake manifolds on 1bbl and super six 2 bbl other than the top opening where the carb mounts to. ?
thanks
|
|
| Back to top |
|
Brussell
EFI Slant 6
Joined: 23 May 2010
Posts: 452
|
|
Post subject:
(Sun Mar 04, 2012 7:39 am)
|
|
|
|
I didn't use an adapter plate I just used a 2bbl plate, Cut a 2bbl hole into the manifold, ground it all flat, drilled holes, tapped them and used some studs I also used a heat resistant epoxy to seal the gap (which was minimal in size) something that wouldn't have issues with petrol.
The only difference between a 1bbl and 2bbl apart from the top opening and/or orientation of the carb as far as I am aware is nothing. It will bolt up to the head exactly the same. Some manifolds are longer (runner length is comparable with better fuel distribution) than others, most of the time the original throttle and kickdown linkage won't translate over.
Thanks.
|
|
| Back to top |
|
ratrodster
2 BBL ''SuperSix''
Joined: 02 Mar 2012
Posts: 22
Location: New Brunswick, Canada
|
|
Post subject:
(Mon Mar 05, 2012 4:14 pm)
|
|
|
|
cool, thanks for the input. i am going to try the 1bbl to 2bbl adaptor on my stock slant 6 225 intake manifold. i have a 2bbl carter bbd (280 cfm) carb and clifford headers with dual exhaust with cherry-bomb glass-packs. im just not sure what cam to use on this otherwise stock motor. i will mostly be driving this car on weekends to meets which are sometime 200 highway miles away.
any advise on this would be great, especially cam choice.
|
|
| Back to top |
|
SlantSixDan
Board Sponsor & Contributor
Joined: 31 Oct 2002
Posts: 21883
Location: North America
|
|
Post subject:
(Mon Mar 05, 2012 4:25 pm)
|
|
|
|
| ratrodster wrote: | | i am going to try the 1bbl to 2bbl adaptor on my stock slant 6 225 intake manifold. |
Try some square wheels while you are at it -- they are both equally bad ideas._________________ 一期一会
By birth & parentage: US citizen, 2nd class
By choice: Canadian citizen, 1st class
|
|
| Back to top |
|
Doc
Guru
Joined: 14 Oct 2002
Posts: 4970
Location: Working in Silicon Valley, USA
|
|
Post subject:
(Mon Mar 05, 2012 4:42 pm)
|
|
|
|
If you need one of these cheap, die-cast 1 to 2 carb adapters, drop me a PM and I will sell you one... out of the bucket-full I have, from taking them off cars, to "set things right" again.
DD
|
|
| Back to top |
|
ratrodster
2 BBL ''SuperSix''
Joined: 02 Mar 2012
Posts: 22
Location: New Brunswick, Canada
|
|
Post subject:
(Mon Mar 05, 2012 5:00 pm)
|
|
|
|
| its that bad of an idea eh ! i just had one kicking around and thought i would use it. its hard to find a intake manifold from a super 6 that will house a 2 bbl carb. anyone have one for sale ?
|
|
| Back to top |
|
Reed
Supercharged
Joined: 03 Nov 2002
Posts: 8508
Location: Fircrest, WA
|
|
Post subject:
(Mon Mar 05, 2012 5:52 pm)
|
|
|
|
| ratrodster wrote: | | its that bad of an idea eh ! |
Yes, it is.
| ratrodster wrote: | | its hard to find a intake manifold from a super 6 that will house a 2 bbl carb |
It is getting that way, but it really isn't too difficult to modify a one barrel intake to accept a two barrel carb. There have been numerous discussions about modifying the one barrel carburetor intake. Use the search feature on this site. |
|
| Back to top |
|
|
