Alright, so I have an 86 Camaro Sport Coupe that originally came with a 2.8MPFI motor and now has has an LG4 305 from an 82 Camaro. When I first got it, it would only run for about a minute then die so I changed the cap n' rotor and coil. Then it'd run for about 2 - 3 minutes then sputter out and die. Realized it wasn't getting much fuel so I crawled under the car and seen the 17 y/o nasty rusted clogged fuel filter on there. So I took that off and put some line in place of it and it got more fuel but still would die. The carb is screwed on it (Edelbrock,eck..) So my dad took the Carter off his Camaro and put it on mine and we changed the plugs and plug wires. Runs terrific. So I drive it around the block a couple times and things are fine. Then I decide to drive it to the gas station and get air in the tires.Well on the way the thing sputters and dies. So I go to put it in park but the shifter just moves back and forth freely. The linkage obviously came off. Anyway, I end up having to push it into this parking lot. I pop the hood and there is fuel on top of the carb, all over the intake. So now it's getting waaay too much fuel. There is so much fuel going into this thing, when I did get it start again it was spewing out the top of the carb.

So I decided I should probably get a carb rebuild kit and a fuel regulator; but my question is; what kind of regulator should I
get? Holley? Aeromotive? Paxton? Barry Grant? Everything on this
305 is stock except for a mild cam. The carb is a 1406 600cfm Edelbrock. Should I even bother rebuilding it or should I replace the stock intake on the engine and put this Holley 650 double pump I have on there? All help appreciated. Thanks!!

 

I can't help you pick a brand, but.. since the stock fuel pressure in fuelies is around 40psi, and for carbs it's around 8... no wonder fuel's shooting out the top of the carb. The float can't handle that much. That being said, any regulator would be a must before you tried to start the car again.

 

I believe that fuel will "pull" through a disconnected in-tank pump. Maybe you want to unhook the in-tank pump and install a fuel pump (electrical) for a carb; I think most of those have built-in regulators...?

 

I've heard that, and I've also heard that it will create a huge resistance for the inline pump and kill it fairly quickly.

Either way, I think I'd rather just yank the old one out, if I was going with the new pump route.

 

Okay, I wasn't specific enough and didn't really ask the right question. The car has no in-tank pump. It's a carter in-line electric fuel pump.

What I really need to know is, what regulator should I get
with what psi? 1 - 4 psi? 4 1/2 - 9 psi?

Also, would a 650cfm double pump Holley flood the poor 305?

I'm going to be asking lots of more questions in the near
future. I'm putting an L69, 5speed, and posi rear from an
84 Z28 into my 86 Sport Coupe.

Okay, an engine question. What is the huge difference
between the LG4 and the L69?

thanks ya'll!

 

I had a 4 1/2 to 9 PSI on a Edelbrock set to 6 PSI. It ran fine.
I hope you aren't running your engine without a fuel filter, you can destroy your carb that way.

 

a 640 wont flood a 305. You just have too much fuel preasure. The gas is leaking past the needle and seat. Probably squirting out the vent stacks.

 

6 psi is too much pressure for a carb. Carbs work best with as little fuel pressure as you can give them; all you need is flow, to keep the fuel bowls (which are at atmospheric, zero psi) full.

I'd get the lower pressure one, and set it for 3-4 psi.

A 650 would be good for a 305, especially if it's a spreadbore.

 

Yes I'm running a fuel filter...1 before the pump and 1 after.


Engine Question #2
This L69 motor is from a 1984 Camaro Z28.
So that means this thing does not have a
roller cam correct?

So what kind of cam is in it? Mechanical? Hydraulic Flat Tappet?
I was thinking of using a CraneCams Retrofit PowerMax
cam #3.

Here are the specs:

.222/.230 duration

112 degree lobe seperation

.509/.528 lift

I want to run that cam on the motor along w. the stock
short block, stock heads, Weiand X-CELerator Intake,
and shorty headers.

 

Okay I just seen this cam, I think this may be a little better
for my application.

It's the CompCams 268H High Energy Cam.
Specs:

220/220 duration

454/454 lift.

What all would I have to do in order to
use this cam? Would I have to change the valves springs?
Lifters? All help appreciated. Thanks