A guy from Estonia posted this on another board. What say you? Hi guys. As I cant get my own racecar ready this season I have chance to use my friend nice Buick GS. I have question about carb size...I think myself this particular carb there is too big. Here is motor list : Buick 455cid .040 overbored and align-honed Stock crank and rods ( balanced ) Wiseco forged pistons 10.6:1 TA Performance Stage 2 Street Eliminator cilinder heads ported by Greg Gessler (also changed intake valves to bigger ones) TA Performance SP1 intake also ported by Greg Gessler AED 1000 HO carburator (modified Holley HP4150 carb) TA296-08H10 Gibson 110 hydraulic roller camshaft 243/247@.050 TA Performance High performance oil pump TA Performance 1.65 ratio roller rockers TA Performance stage 2 headers Mandrel bent 3" exhaust Walker Dynomax mufflers Coan Racing Maximum Performance 10" 3500 stall converter TH400 tranny
That says it all. Tell him to get in the Buick, buckle up and hold on. Buicks have to be the most misunderstood performance cars ever.
If I had this set up I might downsize the boosters and jets to get a baseline and then move up if needed. It should run pretty well IMHO
This post hits home with me. I recently swapped out my stock intake and 2bbl carb on my '72 Lesabre 350, put in a TA intake and a 750cfm 4bbl carb. Started fine and drove ok, but when I went to give it more gas, it would cut out on me or stall. Had some friends take a look who have more experience than I do, and they adjusted the carb and distributor so it wont sstall or cut out. The problem now is I have NO POWER!! I used to be able to light up the tires, now Nothing!! I was told that the 750 carb is chocking my 350 motor, so therefore I will not have any power. Any thoughts??
BS. Every Rochester Q-jet that ever came from the factory on a Buick 350 was rated at 750 cfm. If you've got tuning issues you should start a new thread so we can jump in. Devon
what floors me is that most people who talk carbs don't understand them. Granted I'm not an expert and some may think I'm full of BS as well. One thing we all know is that Buick's like larger carbs. When I put hte 850 Demon on my 455, non-buick people told me it was too much. I spent time learning how to tune it, and the t hing makes my car scream more than it ever did. Gabe, What the hesitation is most likely is a 'lean bog'. This could be solved by changing accelerator pump cams or squirters on a Holley.
After a few laps read the spark plugs and an exhaust pipe check. That is the best way to see if you have the correct size of carburator.
I don't have a Holley, it's an Edelbrock. Plugs and wires are brand spanking new. I have an MSD kit, dist, box and coil that I'll be putting in soon. My friend somewhat turned my current distributor a little bit to get a quicker charge. I'm no expert, nor do I pretend to be one, but I hate having no power, I'm so upset over this.
