does anybody have any experience with this manifold??? I have one and I am going to use it but it has an unusal extension on the throttle bracket that looks like something goes there. My guess would be to reverse the direction of the cable pulll. Pictures are in the throttle cable thread. any and all help would be appreciated.
thanks
jim
PS: the other thread has two pictures of it and i found this one too.
(http://i93.photobucket.com/albums/l66/hellfirejim/carb%20and%20manifold/set11-23-06004.jpg)
I'm wondering about just how well those bisected runners perform in real life.
As I understand it the back pair [primary 2 brl of the carb] feed the lower ports. These ports are fairly small but supposedly give excellent throttle response.
The front pair[secondary of the carb] feed the top ports. These ports are suppossed to be bigger for more flow. After some research I have found that this works pretty good up to about 5500 to 6000 rpm. After that it can't flow enough which is no big deal because that was where i was setting my red line anyway.
I am hoping somebody knows about that aluminum piece bolted to the manifold and linkage.....
jim
I don't know about the 2.3 but on the 2.0 the open plenum full runner manifolds were superior.
The offenhauser gave better throttle response in the low to mid range but suffered somewhat above 4000
and was all but done by 6000.The partition is quite thick and cuts down on runner volume conciderably
reducing high end hp.Still,better than a 2 bbl.
Since this is going to get a turbo down the line my plan is to leave the primary runners alone because most likely It will run there at cruising rpm with the 5 spd and without or very little boost. The secondary plenium I am going to open up for a start and then see what happens. By the time i get into the secondaries I will most likely be in boost anyway.
jim
Will go out on a limb here but I notice that the carb is ninety degrees out of alignment to the engine as it relates the street type manifolds.
If you look in the Esslinger catalogs, just about all of their manifolds have the carbs positioned as yours. They are advertised as "racing only" applications. I suppose that this set up is for circle track racing as the majority of their products are made for this.
Have no idea as how they would work for street use. I have both 2.0 & 2.3 four barrel manifolds and the fuel bowls run parallel with the head.
Al
Interesting observation... I can see where you would get that question. I don't see where it should really matter as carbs have been mounted sideways for years particulaly on tunnel rams and on blowers.
However if somebody can come up with a good reason why not i would surely listen...
jim
No reason at all.It'the only way they could mount it with the split runners.If you think about it the stock carb sits the same way.
The only reason that I would figure as to why the "racing only" application would be the way the fuel in the bowls sets during the constant cornering in a circle track run, along with more consumption of fuel than street use.
I agree that it should not make a difference in street use. Am not all that familiar as to how the fuel delivery from the bowls would be affected. I guess that it all depends on the application.
The 390 Holley that I have always used has the fuel in bowl level pretty high, ( set where fuel just trickles out of the screw on top of the bowls), so I wouldn't think that there would be any chance of either of the two jets starving for fuel unless I was driving at some crazy degree angle.
Just a thought.
Al
I would think the reason it is "off road" or "racing" only is because it has no EGR port. Also, I think rotating the carb. would be more for clearence to the valvecover or lining up of the linkage to the cable.
Bill
Quote from: 77turbopinto on November 23, 2007, 12:56:53 PM
I would think the reason it is "off road" or "racing" only is because it has no EGR port. Also, I think rotating the carb. would be more for clearence to the valvecover or lining up of the linkage to the cable.
Bill
Bingo we have a winner!!! Ok, ok the reason it sits that way is align the primary 2 barrels of the carb over the primary set of runners which run on the bottom. The seconadary 2 barrels fit over the larger secondary ports.
Also this is the only way i have a chance of getting my cable to hookup.
jim
looking at your photo it looks like it was supposed to use a bellcrank to reverse the cables pull.
that is what I thought. right now it will be on hold until I get my throttle cable from Tigger and i get my carb back from being rebuilt and modified...
However the modifications on the manifold contiune.
jim
Quote from: earthquake on November 24, 2007, 01:00:29 PM
looking at your photo it looks like it was supposed to use a bellcrank to reverse the cables pull.
Put one along with a header on my boys Pinto, and it ran like we added 100 hp to the car. Was really great, but gas millage went down the tube because it was so much FUN.
Quote from: dick1172762 on November 28, 2007, 06:59:13 PM
Put one along with a header on my boys Pinto, and it ran like we added 100 hp to the car. Was really great, but gas millage went down the tube because it was so much FUN.
Sorry missed your post. That is good news. That is the results I am looking for. After the 5 spd the turbo will go on and the it will be a LOT of fun....
jim