ive recently got a 350 istalled but....its running off the stock rochester carb. ive been told its running lean even with the settings turned up. i want to have my car run good what would be a suitable carb? would a 650 cfm be fine for street and track (its a daily driver so nothing nuts like a 850-950) but i would like to know what your suggestions on a carb would be

stats on the engine.

Block #14010209...350...80-85
Heads #3970126....67-71...327/350
Crank's Turned
Rod's resized
0.60 over -- new Ring's & Bushings
Flat Top Piston's
Block's Decked
Screw in Stud's & Guide Plates
Edelbrock Performer intake
New Oil Pump & pan
Double Roller timeing Chain and new timeing cover
New Harmonic Balancer
Alum Full Rollor Rockers
327/350 Hp Cam -- Advanced 4`

 

What's wrong with the carb you have now?

 

it runs to lean with everything turned up, and its also the stock carb from a 305 non HO.

 

If it's a daily driver, it is the best possible option for fuel efficiency. Modified they can flow upwards of 750cfm. Work the bugs out of the one you have.

As for the 305 non HO. It's teh same on on the 305 HO. Make's no difference.

 

well i do want some more performance out of it. and i don't know how to modify a carb and have it work thats the other thing. and i don't know of many shops around here that would do that. so a new or rebuilt carb something a lil better is in store. i had it into a shop and well my carb ran a little lean with my 305.

 

https://www.thirdgen.org/newdesign/tech/quadrajet.shtml

 

i would really prefer to get something that will work, im not the most mechanically inclined person. and by trying that myself ill probably screw it up and hten id be without a carb. so suggestions for a carb would be good.

 

Well most carbs that you buy are going to need tuning. Your pretty much going to be looking at the same amount of work for what ever performence carb you buy. However I have been running a holley 670 street avenger carb and all I did was bolt it on and adjust the idle mixture screws and its pretty much dead on. All my plugs look perfect and I have been running it for about a month now. So if your just looking for something to bolt on and go I would reccomend it.

 

now does it fit under the stock hood?

 

Fits under mine, and i am running a taller intake than you so I think youll be fine. You might have a problem if your using the stock air cleaner assembly but you can buy an 14x3 open element setup for about $20. Also if your manifold is a qjet specific manifold you may need an adapter but Im not sure on that one. Good Luck.

 

Just because one person says a Holley SA 670, doesn't mean you need to jump on it (no hard feelings, IROC). There are plenty of other carbs that may be more cost efficient from Holley. Run a search, look around, you can see for yourself.

 

i know im not gonna jump on it right away im a see what i can get first that will fit etc, and give me best bang ofr the buck. the reason for starting this is to see what others would suggest for a 350 carb.

 

No offense taken Stekman, although we normally agree . I dont think you should go and buy the street avenger just because I say so either I just wanted give some input on the subject. I second doing a search, but really its all about your preferences. Good Luck.

 

If the stock LG4 carb is running lean, then tune it. There is no way the fact that it's a q-jet is keeping the engine from running properly. A Canadian LG4 would have a non-computer-controlled q-jet on it, which is tuned just like the "muscle cars" were when they came with q-jets back in the 60's and 70's - main jets & rods for the primaries, and rods & hangers for the secondaries, along with AV adjustment as described in the referenced tech article. If the shop you took it to can't handle the job, you need to either find a different shop, or learn how to tune it yourself.

If you were drag racing this thing all the time and you had a manual transmission, I would make a different recommendation. But, since you don't need to go "nuts", stick with the q-jet and get it working properly. Changing main jets & rods is a little bit harder than changing jets on a Holley, and certainly more complicated than changing rods on a Performer, but you are probably one step away from getting it properly tuned (for the primaries, anyway), so spending three to four hundred dollars on a carb to avoid one carb disassembly just doesn't make sense, especially on a daily driver.

 

I agree stick with it and tune it. I ran from a Q-jet when I first got it, a cc one no less. The I got stuck no money and no car so I had to tune it and learn how it works. Now I love them and am not afraid of them. Mind you I run the CC Q-jet. as far as the carb being froma 305 non HO like he said I t makes no diff. I'm running a CCq-jet from an 81 Olds 98 with a 307 and automatic 2004r on a 350 9C1 caprice motor with a t5 stick. After some mods rejetting and work it mench flows about 800 CFM and runs really strong. My camaro Now can get between 17-25 pending on driving condtions and when you stand on it it pushes back. SO stick it out and you will not be sorry. I found the Haynes Techbook for Rochester carberators to be helpful.

This is the amazon page with the book on it in case I am not alloweb to post it the ISBN number is 1563920689

http://www.amazon.com/exec/obidos/AS...039214-8202260

 

What is the procedure for rebuilding a carburetor? How long would this take?

 

If you click on the link I sent above it will take you to a book that will describe the procedure with loads of pictures. My first rebuild took about 8-10 hours, Of course I was not pressed fr time and did not have a book to reference at the time, so I made 1500 phone calls to my freinds and the locale speed shops and made it through it. after that I bought the book, Worth the reading since it shaved a lot of time of the process.

 

With out to much research of what your car is, just a 350 I would look at it like, you only have two choices. Holly, or demon. Not just because they are so popular and 90% the older trucks out here have some holly sticker on the back window lol.. just because of all the tweaking that youc an do to these brands of carbs. And yes, of course for the fact that they look soooo damn good sitting upon your intake manifold. Look at the carb features and adjustibility.

" if there's anything worth doing, its worth doing right " ~ fear and loathing in las vegas ~