Tunnel Ram Idea: 2 barrel Holley Gurus?!

Hey all,

Have a chump 350, 70 thousand miles, 4 bolt main, in need of rebuid which I will do after I work the bugs out and drive teh car for a season, It's a sloppy early 70s block. Anyway, got a chance to pick up a tunnel ram real cheap, and I noticed that my engine runs really sweet with a stock spread-bore Quadro-Slob 750 CFM.


So here is my crazy idea. I want to have the dual 4 barrel plate on top (really don't like the single plate on top a tunnel ram). The manifold is an older TR1 by Edelbrock that I can get my hands on real cheap.


I was thinking that I would go with two small 2 barrels. Ford was using Holley 2 barrels years back in the Seventies on a bunch of their cars. They had 1 standard Holley bowl on one side and the otherside was like an ***less wonder in skinny jeans (nothing there); but the air cleaner ring is 4 barrel size as well; so I figured, two 2 barrels, with holley bowls may be a way to keep the look on top (as if twin carbs but also a way to keep the fuel at a min.)

I could then mess around with larger jets on the back side to have the second carb dump more (maybe larger jets) as the rpms come up to 3000+ at top end.


Anyone a guru on those older Holley factory two barrels? Which year was ****? Which was best? Which are cheapest to get a hold of? Which are easy to rebuild, etc?

 

Stop smoking that stuff...NOW.

 

You do realize that while you are driving around two Holley vacuum secondary carbs would be the same economy wise, and they wouldn't look wrong.

 

a single 4 on the t ram will give great power and milage, and less headache too. I remeber weiand t rams used to have a Q jet top. never tried that, but a 650 or bigger holley will make you smile.Looks be damned...

 

What are 2 600 Holleys with the secondaries locked closed ? ..........two 2 barrels and you won't need any adapters.......run it straight, no progressive linkage or you will lean out some cylinders......

 

Only on the HAMB do folks do stuff just to be weird, thinking it's cool.

It's just weird.

 

Just run the Holley 450's.

 

First, just learn a little more about engines. Maybe get somebody to help you. Or a book. Or video...


Wait- FIRST- Stop smoking that stuff...NOW. Then- see above

 

I never thought of them looking different; but thanks, 'cause now that you mention it, yes, I guess they would look quite different. In fact, with external fuel filters to the back of each carb, they might look pretty damn cool. I knew I would receive *** clown comments, I am prepared for that on here. In fact, would be surprised if I hadn't. I just wasn't prepared for such deadening and well thought out blows!
Hear you on the smaller 450 Holleys, and I agree. Such certainly is the best option and way to go; except that I get most of my stuff from a pick and pull that a friend owns; and 3-400 bucks in carbs (or even 200 for cores that need rebuilds) is not what I can do now or in the future when I got the manifold for 50 bucks. I would love to charge, charge, charge, but such isn’t gonna’ happen with my son’s college fund, student loans, and what the wife wants changed in the house. And all of you know, two matching smaller 4 barrels aren't going to be lying around. I was just thinking aloud. I will fill in on my progress, as I am doing it. I can’t right now, however, because I have go and learn about engines, and then I’ve paid for a cl*** at night that helps people be different while being cool on the Hamb.

 

Dude, yer' killin' me......

 

Chevettes also came with the Holley 2300.

if you're going to do this, take a close look at Ford's Autolite inline carb. it turned the 2 venturi 90 degrees horizontally, so that the venturis were all equally distant from the cylinders, making equal length runners.

two 2bbls done this way, may make sense. Brad Urban's carb shop tried it before he went under, tho that wasn't the reason.

 

The length and the plenum size of the TR will make the engine run way to lean . They are right stop the CRACK now !

 

Not many factory 2 brl carb were very large you would need at least 4 or 6 of them to fill up that intake

 

I dont agree with the 2-barrel deal on a tunnel, but they did make 500cfm Holley 2's at one time........

 

You can usually pick up holley 1850 vac sec carbs at swapmeets for next to nothing , check the list numbers , if they're the same that's as "matched" as they get.

dave

 

Gene,
I actually set up a 2x4 with twin Holly 500, anular discharge, they were circle track carbs originally. Turned one around backward so that the floatbowls were facing away from each other. It worked well enough but it was a ******* setup. I just wanted to see if it could be done. Opening the hood always started a discussion or two. never tried it on a tunnel ram.

On a tunnel ram on an chump motor (whatever the hell that is) I would probably run chump carbs, I think that edelbroke (sic) makes some chump carbs that would work.

The whole thing sounds pretty ghetto to me. Save the low dollar TR1 for when you have an engine that can handle it.

 

I did a similar thing on my Hemi T coupe. Not really a tunnel ram but its a straight runner, single plane intake with two Holley 350 cfm 2bbls. Straight linkage no progression, and it works very well. A little crabby when its cold but when its warm it runs like a scalded cat. Ya, ***less wonders they are but at least its not a single 4 bbl.

 

I ran a Holley 650 2bbl on the White 64 Corvette in my album for a little while a friend of mine bought a Super Stock car ( I believe A or IHRA car where they allowed bigger carbs)he was going big block so he gave it to me and I put it on as a goof.Looked Like a 2 bbl Dominator.

 

650 2bbl ??? Pics or it doesn't exist.

John

 

CL > new haven > all for sale / wanted > auto parts - by owner
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3-Holley Carb's - $75 (waterbury)

<SECTION id=userbody><SECTION id=postingbody>3 Holley carb's 600cfm's $75. for all 3. One missing ear.
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Oh no! This is not gonna turn into another "Brake Master Cylinder Debate/******* contest" is it? Already there are several people who have verified it can be done (by the way, those who said you did it, run for the hills, you will be lumped in with me as a hack and a liar) Come on, bring on the "stupid" and not traditional and all the other boring stuff. By the way, a chump engine is any engine that is tired; just what it sounds like; it is a turd, tired, sloppy motor in need of a rebuild. In my case a SBC.

 

Try doing a google search,here's one for sale on ebay 200894185971

 

I'll give you some input based on what I tried when working out the bugs on my 327 with Holley tunnel ram. I bought twin 450 Holley 4 barrel carbs and thought I'd disconnect the linkage to the secondaries, and run off the two carb's primaries. It drove OK, but gutless, and starving for fuel! Hooked the secondaries back up, and it came to life. These were set up to run together. As mentioned previously, progressive linkage will create lean cylinders on a TR setup.
I doubt a couple matching two barrels will make enough air/fuel to run your 350 properly. I think if you keep looking you'll find something. I just found two Holley 600 cfm carbs with vacuum secondaries, like new in original boxes, for $260 for the pair. They're going on my next tunnel ram BBC project motor.

 

I hear you with the starving for fuel idea, but chevy ran tons of small blocks with 2 barrel Rochesters all the way up to the mid Eightees (on 305/307s as well). Ford did the same. So if one two barrel can feed a 350, or 351 (Ford or Chevy), then I am sure that two could be jetted, worked, figured out to supply the same fuel as one Quadro-Slob.

 

Holley 6425 650CFM 2 barrel



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$325.00

 

Picture won't come up; but type those numbers in Google and... Anyway, that is way, way, way too large. But 2 350s would work.

 

You need to look at the size of that intake you need to fill that thing up with air and fuel thats why you will see twn dominator on a small block with a tunnel ram at the track and not be over carbed

 

Exactly, smaller carb does not mean better carbs in the case of a large plenum intake.

 

I wasn't suggesting you run those carbs, I was telling a story about my 2bbl,listen at the end of the day it's your car and you should do as you please, with the right air cleaners most people won't have any idea anyway.

 

Split dominator, just like he said. For AHRA Formula 3. Theres an article in SS/DI around '71/'72. Anyone who would go out of their way to run two two bbls on a tunnel ram qualifies for a frequent flyers discount on the short bus.