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Old 02-06-2003, 04:33 PM
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Post one 4 barrel carb or multi carbs...........

I have been getting a lot of crap from my friends about running multi carbs. They all tell me that if I dump the two 4 barrel carbs that I will make more HP & Torque with a single 4. Why am I getting all this crap over running two 4 barrel carbs, would it be really worth it to dump them and go with just a single 4. I don't have any bogging problem, it doesn't run rich and blow black smoke, it gets 20-23 MPG on the highway running under 65 and runs better than the holley 4 barrel I had on my 71 Mustang. They have me contemplating about switching to a single 4, is it really going to make that much difference????I am just getting tired of being razed over this so should I dump the 2 carbs???

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Old 02-06-2003, 04:40 PM
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If you've got 2 fours, and it runs good, I would leave it alone, your friends are just jealous. Alot of guys aren't smart enough to tune 2 fours, that's about it in a nutshell. I would have to think that the 2 fours would rival a top notch single four barrel set-up.
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Old 02-06-2003, 04:46 PM
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Tuned it?????? I haven't tuned it yet, I just bolted down the two 500 Edelbrock Carbs and run it.
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Old 02-06-2003, 04:50 PM
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I think a lot of people go with a single 4 barrel cause it's easier to set up. I also think a lot of people over carb with two 4 barrels cause they don't use small enough 4 barrels. One of my neighbors behind my house has an S-10 pickup with a worked 350sbc that runs dual fours. Runs like a bear and I've watched this guy let it sit there idling in his driveway while working on it, no loading up or anything. If we weren't buried under 40" of snow I would ask him to pull it out so I could take a pic of it to post. Looks cool with two 4's through the hood . I say if your car runs as good as you say leave it. Just my thought.
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Old 02-06-2003, 04:51 PM
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Well, if that's the case, your way ahead already. I read a shootout on using vintage intakes and carbs vs. more modern single four barrel equipment on a 327 chevy, and the dual four barrel set up pretty much stayed right with the best single four barrel system, and we all know which one looks better!
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Old 02-06-2003, 05:04 PM
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When I set it up I made sure the linkage was right, I think alot of the problems people have with multi carbs is setting the linkage correctly. They are touchy in this area, if not set right they try to open the other carb early or late then you get the dreaded bogs. My friends are telling me that the single 4 would be faster because my 60 foot times suck at the track. The only thing I do is spin through the first 2 gears then I grab, so how would going to a single 4 increase my 60 foot times? I think they are wrong, and yes there is a wow factor when somebody sees you engine has two 4 barrel carbs. I just love it when people tell me you can't run two 4 barrel carbs on the street, then I show them and tell them its a 289 motor. Their jaws about hit the ground. Thanks for your advice, I guess if it isn't broke don't fix it.
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Old 02-06-2003, 05:27 PM
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[quote]Originally posted by onebadmerc:
<strong> My friends are telling me that the single 4 would be faster because my 60 foot times suck at the track. The only thing I do is spin through the first 2 gears then I grab, so how would going to a single 4 increase my 60 foot times? .</strong><hr></blockquote>

better tires and suspension
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Old 02-06-2003, 08:21 PM
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From what I've experienced, a single four has worked better on small blocks (and a lot of big blocks). However, if you're getting the kind of results you say you are, I wouldn't see any reason to change it. 20-23 mpg with two fours is AWESOME. Plus, it looks all sorts of COOL.
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Old 02-06-2003, 09:12 PM
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my pinto has a 289 with a junk two barrel still working out all the bugs after rebuilding the engine and using alot of the original parts that sat for 22 years.
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Old 02-06-2003, 09:56 PM
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23 mpg?! i get 10 on one 4.... lucky SOB...
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Old 02-06-2003, 10:10 PM
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I need a bucket of arc sparks
 
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It only runs on 2 barrel mode until you open it up, the faster I go the more it drinks. If I keep it under 65 I can get 20-23 MPG if I go 75 it goes down to 10-12 MPG, any faster you watch the gas gauge move.It is set up on a progressive linkage it runs on 2 then to 6 then to all 8 barrels.
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Old 02-07-2003, 05:44 AM
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Is there somekind of formula you can use to figure out if you are using too much carb? You know like a certain setup, cubes-compression ratio-heads, needs a 750cfm carb and another need a 600cfm...ect? Or is it always trial and error?


Todd

I use the trial and error method.
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Old 02-07-2003, 06:06 AM
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Arrow

-Calculating Carburetor CFM-[/b]</a>

<a href="http://www.holley.com/HiOctn/TechServ/TechInfo/FMCTech3.html]-Carburetor Selection Guide By Holley-


[ February 07, 2003: Message edited by: KULTULZ ]</p>
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Old 02-07-2003, 08:56 AM
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i bet as soon as you switch intakes your friends try to buy your dual quad setup.
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