Hot Rods 2 x 2 Intake on a Chevy V8 powered Hot Rod????? (Converted Tri Carb setup)

Anybody ever see a tri carb intake for a Chevy V8 with only 2 carbs on it and the center blocked off?

I was reading some older articles a couple months ago and noticed that a lot of the Tri Carb intakes being sold in the 50's came with a block off plate included. Sort of a street/strip type deal. Now my question is were guys running only two carbs back then? I'm not talking about only 2 working carbs, rather I'm talking about only mounting only two carbs on top and blocking the center one with a plate.

The reason for this is that I have been thinking about a multi carb setup in my '35 coupe with a 265 Chevy lately, and I like the look of a 2 or 4 pot intake. Nicson was the only one that I am aware of that sold a 2 x 2 intake for the Chevy V8 but the only one I have ever seen for sale went up and along last week here on the HAMB. I have only two rebuilt 97's on my shelf so I am thinking that this 3 carb intake converted to two running ones might be kind of cool. I really wanted a Weiand 4 pot but I just don't see me buying two more carbs so I can block them off right?

I'll try to get an AD from the old books scanned in that shows the block of plate that was included in tri carb setups.

Yay or nay? Pros & Cons, Likey Dislikey etc....

 

I tried to run end carbs on Edlebrock tri power intake and it didn't work...Would idle but bogged on accel...I'm running this Vintage speed 2x2 on a 350 and works great.............

 

Cool, that's the real wordl knowledge that I was hoping for. It makes sense because your center carb should be the primary right?

That 2x2 adapter gets some flak every once in a while but I am pretty sure I seen those for sale right next to the tri carb intakes in the old books. I think they are pretty cool!!!

Thanks for the input.

 

Knew a guy in the 70s who had block off plates under both end carbs.

 

Yeah, I think a lot of guys run just the center carb because if you have a mild motor a 94 is plenty.

The fact that s**** metal 48 revealed that the two end ones won't perform well sort of puts a wrench in the plans. I either have to pony up for another 97 or go back to the 4bbl idea. Perhaps there are some tricks that some other guys know when running just the end ones.

 

Bought mine on ebay for $65..There are some on there right now..Or you can go to Vintagespeed.com and buy them for about $100............If you have an old 2x4 intake you can put 4barrel to 2 barrel adapters on and run 2-2 barrels that way, also...Hope this helps........

 

The first Edelbrock 3 deuce intake came with a block off plate if you wanted to run 2-2s instead of 3-2s. This is from their 1955 catalog.

 

That's the one Tommy!!! Thanks!! I wonder if because they are smaller Cubic inch motors (ie 265 283's) the two end carbs would work.

Anybody have one of those block off plates????

Do they still make the c355 intake?

 

I can't see any reason why a 3x2 with the center carb blocked off would run any worse than one of those 2x2 adaptors.

 

It didn't work on an Edelbrock tri power intake for me..My buddies and I tried for a week to make it work. We deduce the manifold worked from center carb out, not from back to center...We tried about 4 different jet sizes with no luck...That's not to say we really knew what we were doing though.........

 

I think the bare metal model A coupe that Pinkees Rod shop built was running only two carbs on a tri power intake.

 

See, if I can't get it to run right. And I do mean right then it's sort of counter intuitive for me to do it. I want my '35 to be pretty dialed in (as much as a car with 55-75 year old technology can). I wouldn't mind running all three but I just don't have it in me to buy another 97 right now on top of an intake.

Who knows though, we might here some good tech out of this.....

I wish I would have nabbed that Nicson last week!

 

I know this probably isn't traditional enough for you but I built this for less than $40 and it ran well on a 305.Just a thought.If I can help just ask.

 

A 3x2 intake is designed with a common plenum, I don't think you'll have any worse time tuning it with two carbs on a straight linkage than 3 with a progressive. Either way, you're gonna be monkeying with it a bit...

Ain't that the truth!!

 

Here's the Pinkee's Coupe. It actually has an Offy 4 (or 6) pot intake with just the two center carb running side by side.....hmmm.

 

JJ , why don't you look for a 2x4 set up? they were stock from factory. My 56 Vette, 265 had a 2x4 that ran great. They are around and the right cool factor look.

It was a stock option 56 and 57

one on EBAY now Intake

and another intake

 

just to let some of you guys know that dont mind running rochesters. 3 vega carbs with stright linkage works great. no jeting. kit them and run them, leave idle and the power valves in. kind of like a poor mans (man a fre.) we have done this with edelbrock and weiand manifolds like i said works great. you will need a uninsin guage to set carbs. all need the same air flow at idle and at part throtle. 3x2 the easy way thanks jim

 

2-2s will need to be synchronized because they work together. 3-2s with progressive linkage doesn't need that because it runs off of the center carb only until it is floored. Any multiple carb system will take some fiddlin'
If you want easy put a 4 bbl on it.

My stock flathead Merc and my 259 Studebaker engine both have 2-2s and have worked fine for years. I did a post on synchronizing 2-2s a few years ago. It's on the HAMB somewhere.

 

Not that I want easy at all. I know it'll take some work but I like when I know something works properly if tuned well instead of a mythological happy place that might not exist.

The 2 x 2 intake like on your Merc motor is the hot setup for me. I love em but I just was wondering how it would work with a three 2 intake.

I would have loved the 2 x 4 setup but they are pricey in conjunction with the right carbs. Love 2 4bbls though!!!

 

get one of those super-duper easy to find NICSON intakes!!

 

I gotta be honest, those 2x2 to 4 bbl adaptors look cheesy. How about 2 4 bbl to 2 bbl adaptors on a dual 4 manifold as mentioned?

I can think of a possible issue tho. with a standard 3x2 setup, you'd run an accelerator pump and choke on the middle carb with the end with no choke or accelerator pump. Running the middle carb, the fuel can be distributed more easily on acceleration since the middle port is in closer proximity to the runners. By running a 2x2 setup, the front carb may be too far forward to properly distribute fuel to the rear cylinders. Maybe you could alleviate this issue by running the front carb with a choke and no choke in the rear, and use accelerator pumps on both, maybe switching to a smaller pump to lessen the fuel load on acceleration

 

Sounds good to me.

 

Keep in mind a 97 is 150 CFM. 2 = 300 & 3 is still only 450. The guy I mentioned earlier was running a 4 bolt carb.

 

JJ..You should have no problem with running the two outside ones as primaries. You might want to put smaller jets and power valves in both. I would use a block off plate under a dummy 97 in the middle, plug the fuel going in and on your way..
Both outside 97s will need to be set for idle..A little air/fuel adjustments it will work GREAT...
You can do it..
Duane.

 

MAN that looks sweet!

 

I ran one of the 2x2 adapters on the T coupe i built. I liked how it looked but I took the time to fit the adapter to the intake. If it wasn't for the bolts holding the adapter on it looked like 1 piece.

I ran 2 94's. It ran pretty good and with a little more tinkering it could have run great.

I'm guessing 2 97's are a little small cfm wise for a healthy small block but should be OK for a 265.
Clark

 

I made this one about 8 -9 years ago... it worked awesome.



I took and old Weiand 4 barrel intake... designed an adaptor, had the adaptor CNC machined out, and then had a buddy weld it on... I then ground it all smooth and blasted it so it looked uniform.

Sam

 

That's a cool set up SamIyam...........

 

My poor boy Nicson,Vette 2x4 intake and adapter plates to mount rochester 2GC's.Looks good,haven't ran it yet?? On a '56 265.

 

SamIyam, that think looks pretty legit. Love it!!!

265glide, I'm interested to see how that thing runs. If I had a 2 x 4 intake I probably would just run two WCFB's but I like where you're at on that one too!