1 carb. or 2

I was just wondering about running 2 carbs... I am building a +.040 350 with 10:1 compression pistons I am running a set of "double hump" heads and they have 2.02 valves. the cam I have is a solid roller isky that is .600/.605 lift and 300/305 duration rated from 2600-7,000 rpms and I would just like to ask if anyone has run something close to this set-up with 1 or two carbs? Can anyone tell me what the pro's and con's are to running? I am after mainly the look so gas mileage don't really matter. If anyone can tell me how hard they are to keep in tune with each other that would be great! Everybody that I know around here has just said that they take too much gas and they never stay running right and are a really big pain to run. My grandmother has 2 edelbrocks on her 68 camaro with a 402 and never had a problem could some of you please suggest what kind and what size to run on this application thank you for your time!!! :smokin:

If you're going to run it on the street, just pick up 2 vacuum secondary carbs. The manual secondary carbs will be a pain to set up unless you're "race only". Vacuum secondary carbs will adjust themselves according to what the engine wants. The only problem is when you hit the gas, you'll automatically open 4 barrels (2 on each carb), which of course is too much. There are "progressive" linkages for two-4-barrel set-ups. These will let you open only the 2 primary barrels on the first carb, then as you step on the gas harder, the primaries on the second carb will start to open...kind of like running a single 4 barrel with manual secondaries. Depending on what intake manifold you use, if you use the Holley 600's (0-1850) or any holley for that matter, you may have to mount them sideways. Holley 600's are probably the cheapest out there.So I guess, unless you gonna really stomp on it, the secondaries in both carbs will hardly be used. But they're tune-able...not much harder than tuning a single carb, and you'll definitely get the look you want...especially with the carbs mounted sideways. It's only as hard as you think it is. Once you've played with it, you'll figure it out...then you can show everyone that you know how to do it right :)...that'll make you look like a master mechanic/genius :). Good Luck (Don't let anyone stop you from trying to learn. They probably couldn't tune their carbs because others were telling them it was a pain to run,and was un-tuneable...prove them wrong :)

One properly sized carb is all you need, preferably vacuum secondary. Drop a Q jet on it; it will adapt to the driving demands, based on airflow. Qjets are set it and forget it. Holeys, misspelling intentional are nothing but trouble. Ray

Thanks A1 your words of confidence is really what I needed to hear would you suggest the smaller runner tunnelram or a large race type ram? this car is going to be driven to the local car shows and cruises. what is your opinion on edlbrocks? how hard are they to adjust? do they make progressive linkages that I can buy for a particular setup or will I have to make the linkage myself? You were right about the reason why they told me it was to hard to tune them they just put them on and couldn't get it perfect right away and so they deemed it "too hard" and tried to discurage me but thanks for your confidence!!!

I never really worked on Edelbrock carbs, but I've worked with (adjusted) Carter carbs, which are pretty much the same thing. The good thing about those is that you can mount them "in-line", so the linkages will automatically line up (unlike sideways-mounted Holleys). Another good thing about them is that they don't have power valves to blow out. Even though Holley pretty much solved that problem, with Carters and Edelbrocks, there's no worry. The smaller tunnel ram will definitely help low-end torque. But I've noticed those sit a little higher that the "lower-profile" big runner tunnel rams. There's a way to have 2 carbs, and only run one...if you want to do it that way. Just put a block off plate below one of the carbs, and remove the butterflies (throttle plates), so they don't hit the block-off plate. Hook up the linkage just like you would normally, and plug the fuel line (or just make a "dummy" line) to the in-operable carb. Now it'll just run on one carb. You may have some mixture problems, because one carb will sit directly over 4 cylinders but not the others. But for simplicity, that's an option :)(You'll have the look that you want, with less gas-guzzling). If you're running an automatic, you can choose whatever cam you want, but with a standard trans, there'll be a lot of jerking with a "race" cam. Since you're going to do mostly shows and cruises, a race cam, or maybe just a good sounding performance cam...with an auto trans, will work good. Go to http://www.edelbrock.com and click on "automotive parts", then in the left column, click on "Accessories", then click on "Carb.Accessories-Performer series". In there you'll find a progressive linkage set-up for Edelbrock carbs. Tunnel Rams and multiple carb set-ups have been around since the early hot-rod days (Multiple Strombergs? :)). Sounds like you're going to have fun with this...keep us updated :).

ok guys i need help im 15 i just bought an 87 camaro with a 305,4 speed automatic transmition for $300 and i know a little about cars but not that much ok heres what i need to know. my camaro needs a intake manifold because its cracked where manifold and thermostat housing bolt together (causing it to leak) i wanna go with a tunnel ram but some people are saying 2 carbs are too much gas intake for my 305 motor so should i go with a single carb 4bbl tunnel ram,or i want to go with a dual carb 4bbl tunnel ram what do ya'll think you can email me at [email protected] or reply on here thank you

87 - Welcome Aboard!

While it's a good idea to search the forums for information you might need, it's usually best to start a new thread so that your questions will get all the attention they deserve.

It would probably be better to post this again in the Camaro Forum rather than the Chevelle Forum.