marginal at best.I ran two on a nearly stock 289 ford, but it would have gone heaps better with a fourbarrel i think. maybe try to find some of the larger late ones, 2100s? or two rochesters.
A 2X2 for a 318? 94s, depending on witch ones, run from 150-200 CFM, so 300-400 CFM. Technically it's under carbed, but the 351C-2V 2 bl carb is supposedly only 350 & they run well.
Why would you want to? How about instead three 2100s on a stock manifold like the factory did in 1970? Can we say six pack? You'd need to port match the small port heads, or swap on something better (308s, magnums, or the new Indy LA X heads) with all the related work that entails. Summit Racing a**** others has the correct carbs and manifolds, and for a while (still might) mother Mopar even had all the little bits available (fuel lines, linkage, air cleaner, etc.) in add on kits to it work. Good luck finding a dealer locally to sell you anything though since the feds took Chrysler over, but you can probably still find the most all the stuff mail order.
I'm going to run three small-base Rochesters on mine, with a Six Pack manifold and self-made adapters for the Rochesters. Why? Driveability....
a friend was gonna trade me for some parts he has a eelco 4bbl to 2 adapter with 2 holley 94's if its not gonna work then im just gonna use the 4bbl i have
How about a 2x2 Carter BBD for your Mopar. 560 cfm (just right). Notice that my linkage is progressive and that one carb is opposite of the other. These carbs are stock on 318 mopars.
I found this information on the Carburator Flow Rating in CFM of some common 1 and 2 BBL's, and I thought I would share it in case someone else is looking: The formula for determining the air required by a 4-stroke engine is: CFM = (engine size in cubic inches) x (maximum RPM) / 3456 Let ***ume that we are going to upgrade a 225 CID engine is going to run at a maximum of 5000 RPM. With 100% volumetric efficiency (VE), we will theoretically need 325 CFM but, since there are pressure drops in the induction system, we will only need 244 CFM with a VE of 75% and 276 CFM at 85%. Two barrel carbs are rated at 3.0 inches of mercury (@ 3.0" Hg) pressure drop while four barrel carbs are rated at 1.5 inches. The relationship between the air flow rating in CFM between the two pressure drops is: (Flow @ 3.0" Hg) = 1.414 x (Flow @ 1.5" Hg) The original Carter BBS 1bbl carb was rated around 200 CFM (~ 141 CFM @ 1.5" Hg). The two barrel BBD carb that came with the Super Six package was rated around 285 CFM (~ 202 CFM @ 1.5" Hg). A summary of the flow ratings of the carbs people have used or have talked about using on slant six cars: <TABLE border=1 width=523 height=119><TBODY><TR><TD height=18 width=180>Carburetor</TD><TD height=18 width=162>CFM Flow Rating @ 1.5" Hg</TD><TD height=18 width=159>CFM Flow Rating @ 3.0" Hg</TD></TR><TR><TD height=18 width=180>Carter BBS</TD><TD height=18 width=162>~ 141</TD><TD height=18 width=159>~ 200</TD></TR><TR><TD height=18 width=180>Carter BBD (/6 model)</TD><TD height=18 width=162>~ 202</TD><TD height=18 width=159>~ 285</TD></TR><TR><TD height=18 width=180>Edelbrock 1403</TD><TD height=18 width=162>500 (no info about primary flow yet) </TD><TD height=18 width=159>707 (no info about primary flow yet) </TD></TR><TR><TD height=18 width=180>Holley 1920</TD><TD height=18 width=162>99 - 156</TD><TD height=18 width=159>140 - 220</TD></TR><TR><TD height=18 width=180>Holley 1920 (/6 model)</TD><TD height=18 width=162>131</TD><TD height=18 width=159>185</TD></TR><TR><TD height=17 width=180>Holley 1945</TD><TD height=17 width=162>120</TD><TD height=17 width=159>170</TD></TR><TR><TD height=17 width=180>Holley 2300 Series </TD><TD height=17 width=162>156 - 442</TD><TD height=17 width=159>220 - 625</TD></TR><TR><TD height=17 width=180>Holley 7448</TD><TD height=17 width=162>248</TD><TD height=17 width=159>350</TD></TR><TR><TD height=17 width=180>Holley 4412</TD><TD height=17 width=162>354</TD><TD height=17 width=159>500</TD></TR><TR><TD height=17 width=180>Holley 2280</TD><TD height=17 width=162>184 - 240</TD><TD height=17 width=159>260 - 340</TD></TR><TR><TD height=17 width=180>Holley 2210</TD><TD height=17 width=162>184 - 240</TD><TD height=17 width=159>260 - 340</TD></TR><TR><TD height=17 width=180>Holley 2245</TD><TD height=17 width=162>212 - 226</TD><TD height=17 width=159>300 - 320</TD></TR><TR><TD height=17 width=180>Holley 2305</TD><TD height=17 width=162>248 & 354</TD><TD height=17 width=159>350 & 500</TD></TR><TR><TD height=17 width=180>Holley 5200</TD><TD height=17 width=162>163</TD><TD height=17 width=159>230</TD></TR><TR><TD height=17 width=180>Holley 0-8007</TD><TD height=17 width=162>390 195 (primary side only) </TD><TD height=17 width=159>551 276 (primary side only) </TD></TR><TR><TD height=17 width=180>Holley 0-1850</TD><TD height=17 width=162>600 300 (primary side only) </TD><TD height=17 width=159>848 424 (primary side only) </TD></TR><TR><TD height=17 width=180>Rochester Dualjet</TD><TD height=17 width=162>161</TD><TD height=17 width=159>227</TD></TR><TR><TD height=17 width=180>Rochester Quadrajet</TD><TD height=17 width=162>750 161 (primary side only) </TD><TD height=17 width=159>1061 227 (primary side only) </TD></TR></TBODY></TABLE> The flow ratings at the two pressure drops are simply a guide to help people to match a carburetor to their engine. A small carburetor will more closely result in a 3.0" Hg pressure drop while a large carburetor will more closely result in a 1.5" Hg pressure drop. A carburetor that has a lower pressure drop results in an engine with a higher volumetric efficiency. The important thing to remember is that the carburetor must provide the engine with as close to the optimum fuel mixture for the operating condition as possible. If you are using a staged carburetor, the maximum airflow through the primary (or primaries) should be less than the maximum required by engine. If the primary airflow is greater, the secondary airflow will be minimal. If the primary airflow is too large, small changes in throttle position result in large changes in flow, which results in poor drivability. Also, a too-large of primary barrel size results in the carburetor cruising with the idle circuits because there is not enough airflow to start fuel flow in the main fuel circuits. http://www.rasoenterprises.com/inde...18:carburetion&catid=45:carburetion&Itemid=49
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