My truck needs some goodies (355).
Plan A. might not fly (144powercharger) already very high compression probably couldent run much boost even if I were to swap heads.

So I was thinking plan B would be a tri power setup with 3, 500cfm 2bbls.
I was also considering a dual quad setup with two 500cfm 4bbls.

What are the pros and cons of these setups? This will be driven on the street once in a while just for kicks, I hoping to get the truck back in show condition by the end of the year and the current setup dosent appeal to me anymore. Power along with show appeal would be a plus.
Besides I might as well spend the insurance money from the camaro on somthing beside taxes.

Thanks!

How about a tunnel ram? Some of the smaller runnered ones can be very streetable. I'd say it would have much more visible impact than a 144 or plain duals, and you won't have to worry about your compression problem. Summit sells that tunnelram/dual 450 Holley combo for under $600 that I've heard works great.

I looked into a few dual tunnel rams last night. There too tall and wont clear the hood. I wish I could go with a cowl but the show class I was and am hoping to get back into wont let me use any aftermarket body parts that are not an O.E replacement. Vis req "Outside must retain all stock apperances." Is thier a small one that I'm not finding that will fit? I think the hood clearance is a little under a foot from base of block to hood limit.


Thanks!
SSC

lol..I know a few shorter tunnel rams..but they ain't streetable.

I dunno man...can you lower the k member

Funny thing is that would be legit, although it would take a bit more than that.

How "unstreetable" are these setups?


SSC

Jan 2002 hot rod did a big intake/carb test. Dual quads, tri power, even 6 strombergs.

On a 350 with a single Holley HP-Series 830 cfm carb, it made 492 hp, 436 lb-ft.

The Summit combo with 2 450 carbs made 491 hp, 443 lb-ft. "However, even though a tunnel ram is considered by many to be a high-rpm manifold, this one made as much as 40 more lb-ft of torque (and therefore more horsepower) at rpm points below 3,600 as compared to the 4 barrel."

Edelbrock Street Tunnel Ram, 2 650 Race Demon TR carbs made 503 hp, 452 lb-ft. Averages 6 hp and 6 lb-ft more than the summit tunnel-ram combo, but those race demons run 'under $700 each at Jeg's.'

Dual quad killed peak numbers, strombergs lost BIG power, couldn't run tri power (w/ rochesters) but they are guessing it would have run right up with a single 4 barrel, plus better mpg.

"tri power setup with 3, 500cfm 2bbls." You haven't put too much thought into this, have you? A holley 750 is all a street driven 350 needs (unless you go nuts), and you want 1500 cfm? That could only work if you had progressive linkage that barely got the outer carbs out of the idle circuit.

"tri power setup with 3, 500cfm 2bbls." You haven't put too much thought into this, have you? A holley 750 is all a street driven 350 needs (unless you go nuts), and you want 1500 cfm? That could only work if you had progressive linkage that barely got the outer carbs out of the idle circuit."


actually I was going to run progresive linkage to the front and rear carbs leaving the center carb dry and blocked. The rear carb would only open at 3/4+. I really just want to see the look on peoples faces when they see 3, 500cfm carbs. Yea, I Know its overkill and probably would just dump fuel either way.

The build is on hold for awhile, I stoped in the middle of a cam swap, going to a very mean soild roller cam. The xcellerator and the 670 should work for the time being, If I ever get the heads ported and down the the machine shop. I'm going to take measurements as soon as I get some free time so I know how much hood clearnace there really is, It going to be real easy to do it with a fender removed (2 new fenders on the way).



Thanks for the reply!!!



SSC

Just my two cents but the tri-power set up has great eye appeal and has the image pedigree of the great 50's and 60's performance engines. BUT...I'd use the SMALLEST Rochester 2G (278 CFM) two barrel carbs for a 3X2 setup.

IMHO, what good is eye-candy if you can't just jump in, start it up, drive around town and stomp on it when you feel like it without it coughing and gagging? You've got to use SMALL carbs to do that.