hey if i went to the junk yard, picked up a carb/intake off some wrecked firebird or camaro with a 350 engine and slapped it on a 350 bored out to 355, would that work? could the old carb be ajusted to work decent with the 355?

 

There is essentially NO difference between a 350 and a 355 assuming similar head/cam/intake/exaust profiles. Go ahead.

 

i know this isnt the right board for it, but when i do bore out my 350 to a 355, am i still able to use the same cam and crank? how about the heads?

 

Just by changing the boars are not going change anything but the pistons, compression ratio and rings you need.

 

carbs arent designed for displacement,in other words,you dont buy a 350 carb,you buy for instance a 650 holley-650 being the amount of cfm.You can use a carb that was originally on a 454-but it will have way too much cfm for a small block of course.What cfm is your carb rated at?no small block unless really modifed should need more than 650cfm.

 

If I am not mistaken arn't most of the quadra jets good to 800cfm? If you look in a parts book or work in a parts store you can look up the same quadrajet for anything from a 305 to a 454 if you look up the carb up for the same year vehicle.

 

Heh, I borrowed a Q-jet off a 1980 454 along with the distributor and slapped it in my 305, changed the hangers and that sucker ran great. (was having problems with the cc q-jet)

 

ok, forget the junkyard idea. im probly going to be boreing my engine out to a 355 if that is indeed the next size up for my 350. i was looking at edelbrocks web page and its extreamly confuseing (whats the difference bettween spread bore and square bore?).... i cant seem to get a price quote, let alone figure out wich carb/intake manifold i need. im guessing my engine would be listed under small block chevy and not pontiac right? i have an 89 T/A GTA so its got alot of emmisions controll stuff that i wouldnt mind keeping, but thats not very high on the priority list. right now my main focus is... for a 355, what would be the best carb/intake manifold combo to use? best meaning, most reliable, most user friendly and best all around daily driveing use. my car isnt gona be a hot rod street raceing machine, but it will be my daily driver/weekend warrior any suggestions would be appreciated, thanks.

 

You do realize that a 355 is created when a 350 engine is rebuilt. It's not done for a power increase. It's not the next size up. It's a 30 overbore 350. You could also go 10,20,30,40,50?,60 overbore if you want. If the powerband is the same going from a 350 to 355, the same carb will work. A larger engine will flow more air, that extra air will suck in additional fuel--the extra cubic inches doesn't affect the carb that much. From a 350 to the same engine only 383 c.i. the same carb will work with some minor tuning.

 

ok.... but that still doesnt answer my questions.... im not at all concerned about power right now. i dont even know what kind of carb would work with a 350. all i know at the moment is TPI, i dont know anything about carbs at all.

 

ok here..........if you are going to go carb then this is what you need.......intake, carb, non computer controlled distributor, and NO you will not be able to keep that emissions stuff. you will essentially have no computerized functions what so ever. i would suggest a dual plane high rise manifold from weiand and around a 600-650 cfm edelbrock carb. if you go putting a big cam in then go with the 750cfm edelbrock. if you currently have fuel injection then you will also need a fuel pressure regulator. efi uses high fuel pressure and a carb can only take about 5-6psi max. (efi uses like 40'something psi)

 

whoa whoa whoa.. hold your horses man.. you are going to need to walk before you can run. First off pick up some books at the library on just basic engine knowledge, i.e. how they work.. then maybe get a spark plug change under your belt, adjust timing, perhaps learn how to rebuild a carburetor.. in otherwords, get a grasp of the basics before you go wanting to bolt up flux capacitors and whatnot under the hood.

and whoever told that one guy that the most any small block would need is a 650 is misinformed. If you are using the airflow calculation for a certain % volumetric efficiency and coming up with that number then Ill remind you that a given carburetor is flowed at 1.5inHg.. so for an engine that needed 650 cfm with a 650 cfm carb, the engine would first pull 1.5 inches of vacuum before you reached that point which is terrible for performance.