I have 2 Rochester carburetors both have been rebuilt sometime back one is on the truck now and works great btw 235 engine Do I have to do anything different in order to put both of them on a Fenton duel intake manifold? Will I notice any improvement in performance with duel carbs ? I have Fenton headers and a pertronix ignition that will be installed before end of this summer. Thanks for any feedback
I haven't done this yet but looked into it... From what I've read, a pair of 235 carbs end up "too big". Folks recommend a pair of 216 carbs; or Tom Langdon sells a small carb that's supposed to be great for this type of setup. Whatever you decide, make sure they are jetted *exactly* alike. And I hear choke is only needed on one. Store - Langdon's Stovebolt
I do believe they are jetted the same only difference I had seen in them was when one was on the 216 engine was the base of the carburetor when I swapped to the 235 I just changed the carburetor base for a 235 base.
Are these the only two gaskets needed for a Fenton duel carburetor intake manifold? Thick insulator on manifold and thin gasket between carburetor and thick insulator?
I’m looking for a 1 barrel Rochester carburetor base for a 235 engine If anyone has a core carb please let me know. Thanks
Lotta disinformation on dual carbys . You need two identically jettedcarbys, 'B' series Rochesters are fine . You'll need to balance them, this is the tricky part ~ be sure to have a separate return spring on each one, the spring must be very gentle ~ no big beefy thing . Disconnect the linkage between the two carbys and warm up the engine then use a uni - syn device or other manometer to get both carbys to pull the *excact* same vacuum at idle then adjust the idle speed to 500 ~ 1,000 RPM then re attach the linkage . Of course, you'll need to begin by ensuring the valves are bang spot on and the ignition timing is perfectly set to ball on pointer or you'll be chasing your tail forever . Don't be shy to ask for help repeatedly ~ those who know this can do it fairly easily . I used to do it by ear before my hearing went . Yes, more power, and better idle along with better fuel economy *if* you can resist using all that extra power....
