Ohla, i am on a mission to get rid of my electrical B/S all together. gonna do cam headers cold air and NOW carb. i was just gonna stick with tbi and order a million dollars worth of crap to get my car running when a lightbulb came on yesterday>>>WHY would i spend all that money when i could spend like 150-200 to swap to carb and never have to test a wire again right? so my question is...do i need a different intake(i dont think so)? can i get an adapter plate for tbi to carb??(i think so). and what is the best cheapest carb out there to put on my lo3 305 camaro. THANK YOU so much if you help me out.

 

probably the cheapest and easiest carb to tune is the edelbrock 600 cfm for your application.

 

ok that sounds great. what #? i've heard these have electronic choke? how do i hook that up. and also im confused about the vaccum line they require for vaccum advanced distributors.

 

Youd want the 1405. It is 600cfm, performance calibrated and manual choke. I made the mistake of going with the 750cfm fuel economy calibrated just for the fact that it had an electronic choke, thinking it was convenient. Ended up being the wrong carb for my application, but I also had cam and heads as well. I ended up with a 750cfm holley with a manual choke, and it's so much more simple. I like being in control of the choke when I want to be.

But either way, the electric choke hooks up with two wires. One wire is black and goes to a ground source (you can attach it to one of the screws on the choke) and the other goes to a keyed ignition source that gets 12v. I used one of the slots where the fuel injection fuses went in the fuse box...didnt need those anymore lol.

As far as vacuum advance goes, it works by plugging one end of the hose into one of two vacuum ports on the carb, and the other end into the vacuum canister on the distributor (with this swap you need an HEI distributor with vacuum advance - $100-150, or $50 for a procomp model on ebay. I have one, no complaints)

Each vacuum port changes the spark timing a different way. The 'ported' port on the carb advances the timing only during cruise and WOT, not idle. The 'manifold' vacuum port on the carb gives advance all the time. Use of either one is preference, and use at your discretion according to which feels better and which one yields better mileage (either way I think it's negligable.)

 

nailed it right on the money!

 

thats wonderful information! im in the works of finding a used carb. cant find one for under 200 for some odd reason and if i do they recommend a rebuild and thats another 50 bucks...btw, no one answered me about the tbi to carb adapter plate???

 

Since you have a manual transmission, I would recommend you forget the Performer carb type. The better set-up would be a Holley mechanical secondary (aka "double pumper") in the 600 CFM range.

You do need a different intake manifold.

$200 for the switch carb is dream world stuff. If you buy new, you're looking at ~$130 for the intake, ~$330 for the carb (you can get a reman Holley 600 DP for $280 from Summit), and at least $100 for a decent distributor, plus little things like gaskets and hoses. $700 would be a more reasonable budget; you could probably cut that down a little by shopping for good used stuff (but you still need new gaskets).

 

if anyone swaps anything like this and trys to re-use gaskets or fab their own or simply forget all about them then they should be taken out back beaten with a hose and hung and shot and beaten again and burried and dug up and shot and so on. so dat answers dat on "new gaskets". i will definatly shop used, first i need to find out what came with what as far as vaccum advanced set up goes. second, im also gonna do some buddy searching for carb, and try to go with weiend intake used or new. time to start searching!

 

Just sent you a pm!