can anyone give me advice on what direction to go on out board carbs on my 3 duce set-up . currently has holley carbs but 3bolt base but has idle curcuts in outer carbs. my olds has j2 setup but I used newer gto out board carbs with out idle curcuts and works fine, sounds like I am answering my own question but looking for input on the y-block set-up and what experiences others have had. thanks Joe
no need for idle circuits or chokes on your set-up. check with holley and see if you can buy heavier (thicker) throttle plates for them. you'll be happier with them that way.
Zap- :unitedstates:
You can block the idle circuits easily. Take off the booster venturi "bridges" above the throttle bores, and replace one gasket on each side with a solid gasket. Screw the idle mixture screws all the way in and you're good to go.
I ended up buying 2 new secondary throttle bases from Vintage Speed because I couldn't get the outer carb throttle plates to seal good enough. Tried everything I knew including thicker plates but it never would seal good enough for me. I'm running 3 EGC carbs with a 4.5 power valve in the primary carb, 1/2 inch spacers under each carb, fuel pressure set at 3lbs and the floats set a bit lower than spec. I had problems with the end carbs dripping at idle and after I shut it down. The spacers & low float setting cured that.
guys, thanks for the info I was thinking of the carb bases from speedyway but was not sure of the quality.and a thicker carb spacer was on my list . thanks for the input Joe
You may need to jet down the secondary carbs too.
Ron.