i have a 1983 daytona trans am with 305 4barrel carb stock set up
i want to replace manifold edelbrok and holley street avenger carb do i have to replace the distributor and use a vacuum advance and do i unplug the ecm will i lose any other features will i run into any problems thanks jerry

 

I would worry about replacing the full exhaust before you replace the carb and manifold. And if you have the stock quadrajet carb and replace it the ecm wont work with the new carb and your check engine light will be on.

 

Yes.

You won't have as much money left to do things that will actually make a difference.

As said, you need to start with your exhaust. Resist the temptation to just un-bolt and re-bolt the big things sitting up on top of your engine and make all nice and shiny. "Shiny" and "fast" are 2 different things. "Shiny" makes your wallet lighter. If you want to go faster, instead of being easily distracted by the shiny things along your path, think about and analyze your CAR (note that I said "car", and not "engine") and determine what's the most immediate obstacle keeping the CAR from going faster and attack that. THe reason it's the CAR and not just the ENGINE, is because any number of things besides just the engine could be slowing you down; excess weight, gears, torque converter, suspension, transmission, exhaust, and so forth. Onserve that none of those things is big and shiny and sits on top of your engine for casual passers-by to admire. Instead, they will help casual passers-by in Mustangs to get a better look at your taillights.

Find the ONE THING that's slowing you down the most, the CURRENT LIMIT to your performance, and spend your money there. That's how to go faster for the least $$$. You'll find that most of the things that are REALLY slowing you down, are completely invisible. Buying every piece of eye candy in the Summit catalog is ANYTHING BUT the best way to go fast.

 

I DID EXHAUST ALREADY 2 1/2 IN DYNAMAX WITH FLOWMASTER MUFFLER

 

You need headers.

 

That's a bit on the smallish side, but tolerable until real changes are made.

As sofa says, replacing the carb is the very last mod to make to a stock 305. Go to the FAQ forum and read the thread https://www.thirdgen.org/forums/faq-...5-engines.html

See sig for someone still running a stock carb. Until you're faster than the mid-13's, you certainly don't need another carb.

The one possible argument for a carb change is the manual transmission. But, the Street Avenger is absolutely the wrong way to go, especially with a MT, along with any Edelbrock carb or any vacuum secondary type. A 600 double pumper Holley would work well. And you would need to change the distributor to a vacuum/mechanical advance type. If you have strict visual emissions inspection, it won't pass. The Holley will be harder to pass the emissions sniffer as well.

But it won't make the car any faster than the q-jet will be.

 

i want to replace the q jet not for performance as the q jet is screwed up

 

You'll come out WAY AHEAD to put the "swap the carb" idea behind you, and just repair your existing carb. Swapping the carb ISN'T some kind of universal cure-all that will make all problems vanish. It brings with it a whole long list of its own. All of which, cost more to fix than repairing the Q-Jet.

 

As in how?

I've had a lot of q-jets over the years, this computer controlled one I'm running in the Camaro now is by far the best I've ever had.

I replaced the Edelbrock q-jet I was running on the 396 with a Holley VS. Didn't help much. Going DP did, however.

The Camaro q-jet is much better than that Edelbrock was.

How do you plan on using the car? Daily driver? Q-jet. Regular track time? Holley DP.

 

five7kid...i was in your same shoes about 3 weeks ago...i got on the boards and no one had anything nice to say about me putting on an edelbrock carb. the reason i put it on is because the q jet was DESTROYED, period...no "rebuild kit" nothing. i put on the 1406 carb and had no problems with the ecm. my check engine light does not come on, and the plug up thingys that plugged up into the q jet are just dangling in my engine bay. i did not change my distributor, and everything works fine. my 1406 was almost a factory bolt on. i highly recommend this carb...i had LOTS more power after i installed it.

 

Q-jets can certainly be FUBAR'd, but I'd rather establish that than assume so.

If you're running a stock CC distributor with a 1406, you're shorting yourself seriously on timing advance in cruise mode. Power can be okay if you put enough base timing in it, but starter kick back can be a problem when you do that.

I highly dis-recommend that carb for a manual tranny application.

 

Imagine how much better it would be if you did the swap properly.

 

You should be able to use the same distributor just fine. The vacuum advance is preference only. I don't use it myself. About the ECM im not sure. Hopefully someone else can fill in the blanks besides just ranting that your doing everything wrong

 

"Preference only"?

I don't think so. As Apeiron says, it's a matter of doing it properly. CC distributor w/o the "CC" is a recipe for "next to no timing advance". That's fine for the strip, not so good for the street.

There's no "ranting" here. It's all about doing it right.

 

he just asked a couple of questions Five7Kid. He never asked about performance or if he upgrade his exhaust and buy headers like everyone else was saying. He just wanted to know if he can use the same distributor and some stuff about the ECM possibly acting weird. I didnt mean to contradict you on your Timing advance thing. I agree that for driving around, a vacuum advance is very important. I do strip mostly and never see the highway, so i lock mine out. Idk what his application is fully, so i was just answering his question by telling him that he can run his timing either way if he has a good starter and alot of base timing.