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 Dodge 1957 325 2bblJump to page : 1 Now viewing page 1 [50 messages per page] | View previous thread :: View next thread |
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Torqkent |
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| 58coupe |
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Expert Posts: 1740     Location: Alaska | |||
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| 56D500boy |
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Expert 5K+ Posts: 9900   Location: Lower Mainland BC | Torqkent - 2021-01-29 12:32 AM Hey, I'm thinking about to changimg from 2bbl Stromberg to the 4bbl Carter i think it is. Will My car be more responsive on gas and run smoother or is it just a waste of money? Too make more power, you need more fuel. To burn more fuel, you need more air. To bring in more air, you need a different intake than what you have. You might also need a higher lift/longer duration cam. Then once you have all that fuel and air in there, you will need to bump the timing (more advance) to make use of the extra fuel and air and then you need to get rid of the additional exhaust gases quicker so you need to add dual exhaust if you don't have that already. You won't be saving fuel because you will be having so much fun putting your throttle foot down that you will be burning more fuel than before, even around town, when, in theory, you are only using 2 of the 4 bbl venturis to deliver the fuel. (You'll tip in the throttle to find the other 2 soon enough) But to get started, at the bare minimum, you will need a 4 bbl manifold for your 325 poly. I think the PN is 1735 774 (or 1735774 when searching with Google or on eBay). There are none being offered on eBay at the moment that I could see this AM. They have been there but this eBay auction says "Sold Out" (note: 57 Dodges want 57 Dodge intakes, Chrysler, Desoto, or Plymouth will not work): https://www.ebay.com/p/1023782702 Here *was* a 325 4 bbl that was for sale here 2 years ago: *IF* you did have a 4 bbl manifold for your 325 poly, the OE power pack 4 bbl was probably a Carter 2532S. I don't see one on eBay at the moment. Even if there was, you would probably need to rebuild it anyway using parts from a website like this: https://www.carburetion.com/CarbNumber.asp?Number=2532S OR you could go with a Edelbrock 4 bbl carb and adapter plate (but again, you need that 4 bbl intake manifold). Maybe something like an AVS2 with around 500 cfm capability: https://www.edelbrock.com/avs2-500-cfm-carburetor-with-electric-chok... Your existing carburetor is likely to be a Stromberg WW3-149. You might be able to find a NOS carb on eBay (I couldn't find one at the moment). What I did find were rebuild kits, like this one: https://www.ebay.com/itm/STROMBERG-WW-2BBL-CARBURETOR-KIT-1956-1959-... but maybe better, this one: https://www.carbkitsource.com/kits/ck5251.html Based on the above, the least expensive way forward, perhaps while you look for a 4bbl intake, would be: 1. Dual exhausts with low restriction (but not too loud) mufflers . 2. Rebuild your Stromberg with one of the kits that are out there 3. Tune up (new points, condenser, rotor, cap, plugs and wires) 4. Bump the timing a bit and run a higher octane fuel than you have been say 91 instead of 89, etc. 5. Have fun All of the above, just my opinion, based on some experience. Edited by 56D500boy 2021-01-29 8:14 PM | ||
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| Mr. Bob |
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Regular Posts: 66 Location: Ferndale, WA 98248 | |||
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| Torqkent |
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| Powerflite |
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Expert 5K+ Posts: 9654 Location: So. Cal | |||
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| Torqkent |
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| Mopar1 |
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Expert Posts: 3033 Location: N.W. Fla. | |||
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| 56D500boy |
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Expert 5K+ Posts: 9900 Location: Lower Mainland BC | |||
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| LD3 Greg |
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Expert Posts: 1906 Location: Ontario, Canada | |||
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| Torqkent |
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| 57chizler |
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Expert Posts: 3776 Location: NorCal | Here's my take on the subject....4-barrel carbs usually have smaller primary throttle bores, smaller bores mean higher velocity and higher velocity means better throttle response just off idle and low speed. Since you are running most of the time off of the primary, the smaller bores and higher velocity will actually bring better fuel economy as long as you don't kick in the secondaries too often. I replaced the original 2-barrel on my '57 325 poly with a small (500 CFM) Carter AFB and noticed much better drivability all around. Also changed the valve cover decals to reflect the change (Stock AC LH (Small).JPG) Attachments ----------------  Stock AC LH (Small).JPG (156KB - 171 downloads) | ||
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