moondoggy1302

So a few months back i traded a guy my 02 Z for a 70 chevelle 350, car has a brand new motor, carb, etc as of about a few thousand miles ago. So it needed to get smogged before i could get it registered again and it didnt pass, these were the numbers:

Hydrocarbons in PPM idle standard 450/ idle reading 514
carbon monoxide in% loaded standard 3.75 loaded reading 5.69

The guy sai my car is running to rich which i new when i got that car is was just by the smell so...... how do i tune a 650 edelbrock to lean the **** out of it? thanks!

ATCFLYBOY02

iTrader: (7)

OK the 1st thing is what size are the jets? 2nd BUY A HOLLY hehe

ZONES89RS

iTrader: (25)

.....DING!!!


Yep, i couldnt agree more. You could get a tuning setup and a wide band o2 kit, then you would be able to tune the crap outta the thing easily.

jmm98LS1

iTrader: (28)

Edelbrock carbs are super easy to tune and work just fine IMO. You need to download edelbrock's tuning manual off the internet, it'll tell you everything you need to do. You'll need a calibration kit for your model carb. Most likely you'll just slap the next size bigger metering rods in to lean it out, will take all of 3 minutes to do. If you can't find that online manual, give me a shout & I'll find my link to it.

eliotmansfield

no reason why you cant get the edelbrock dialed in.
Its very easy to change jets and rods - which you cant say about the holley.

ZONES89RS

iTrader: (25)

Holley=dont need no stinkin rods.

They are so user friendlt to me. A edelbrock is not bad but i am happier with a holley.

ATCFLYBOY02

iTrader: (7)

I've fucked w/ just about any type/brand of carb there is and Holley is far the best that I can find... Just my personal preferance, but do what ever you like. Rejet your Edelbrock (If you running a 72/68 or 65 set up go to the 70/62 or 60, that will lean you out some

camarols1

iTrader: (17)

Find someone that has a wideband O2 kit to aid in tuning if you can.
If not, you can hook up a narrow band O2 sensor to at least dial in the idle/light throttle.
Do some google searching for a simple O2 sensor setup that can be monitored with a common digital multimeter.
You can get a much better tune with any carb if you can tell exactly how any of your
tuning changes are affecting the exhaust readings.

b00sted

iTrader: (7)

It's hard to take out 8 bolts and change the jets?


Look at any carbureted car that makes serious power...You won't find an Edelbrock/Carter AFB/Quadrajunk there. You'll find something based off the Holley double pumper's design.

ZONES89RS

iTrader: (25)

b00sted, that is what i tell everyone but some just dont seem to agree.

1 FMF

iTrader: (1)

strictly to pass emissions, and depending on the outcome of tuning the carb and observing spark plug color, you might want to try one heat range hotter spark plug. That can help at idle and under normal load. When passed, you can go back to a safer setup. I'm guessing the oringnall tune on it was 160F thermostat and cold spark plugs too, try sticking a 180F or 190F thermostat in it for the emissions test making sure the car has been running a good 30 minutes and is nice and hot. Not sure if adjusting timing a little will help with CO or NOx, I thought I remember hearing something about that, might be worth researching. Who know's, you might be the only one ever at an emissions' station with the hood up adjusting timing like you were on a chasis dyno

CrazyCamaro

Holly Carb FTMFW.

BOWTIE

Where are you that you have to smog a 70 Chevelle. I thought after 25 years they were smog exempt just about everywhere (except maybe Cali).

edcmat-l1

iTrader: (10)

As stated a couple times, nothing wrong with the Edelbrocks. They're not Holleys but that doesnt mean they dont work ok, or are less tuneable.
The jets and rods are easy enough to change, and yes, probably easier than a holley. You dont even have to drain the bowls to change them.
The only bad part about them is you have to buy a whole tuning kit for them, as opposed to individual parts.
The metering rods and springs act as the power valve does in a Holley. The only difference being that at idle, or slightly off idle, the metering rod is in the jet, so changing to a larger metering rod can lean it out some at part throttle.

waller38

HA! I will agree on the Carter and Quadrajunk, but not the Edelbrock! Its all preference, but by far the 2 best are Holly and Edelbrock. If you tune your Edelbrock in, you can make awesome power! Its not all in the carb either! Its in the cam, heads, valves, intake, and so on. You can make huge power with either carb. You also need to make sure you get your cfm correct for your motor too. So many variables. Anyways, lol so much said for just saying I like Edelbrock lol. I dont mind Holly either!

waller38

I know in Cali its like that, and in Alaska to lol, but in Alaska they go by the standars for that year. They go back to 68!