Fuel regulator needed?

[need-for-speed]

How

YES. I have one on my 650 AVS 2

how do you like the AVS2?

 

[Bandit723]

One word for a regulator Aeromotive, best regulator out there.

I use one of these. Works well.

 

[muscl car]

IMHO, I think regulators are important regardless of the mechanical pump being of the low psi variety or not. A steady pressure in my opinion is better for the needle and seat, plus who is watching their fuel psi while revving it to the moon while working to keep the car under control. I've always tried to run a regulator with a carb.

I watch my fuel pressure constantly and is
easily seen . It let's me know if I'm experiencing a fuel delivery problem

 

[kenny77]

How

how do you like the AVS2?

I switched from a 650 AVS,
The problem with my old 650AVS was a off idle stumble that no matter what, you had to use more timing AND A fatter idle mixture...according to my wideband to help cover up the stumble. Different acc pumps. pumps shots, ect did nothing here. And I truly believe Edelbrock knows the issue, that's why they revised the style of booster they used for the AVS 2. Anyway, the fatter idle mixture along with as much initial timing you dared to give it left you with a nice exhaust stink at a stoplight and about a 12 or 13 to 1 ratio at idle. So basically, an incomplete burn.

The new 650AVS 2 has a different style of booster that not only eliminated that flat spot stumble off idle, but as a result lets you turn those idle mixture screws in to achieve ...on mine..14.6-15.5 to 1 at idle, hard to get a rock steady idle reading with my cam. But now with no hesitation when I let out the clutch and step on it. No more headache from the stink after you drive the car for more than 10 miles in traffic. I'm amazed how all sorts of people on all different forums think that the idle stink is just part of driving a 70's car.
In fact now, it feels real close, seat of the pants to a FI set up.
I bought the AVS 2 based on real world owner reviews of application,and trying to separate them from just opinions

Jeff Smith was right about this one: From 3:50 to 7:00 he explains on the video

 

[cadillac_al]

Carquest fuel pumps only put out 5 psi. I haven't needed a FPR with my Eddy carbs. I don't know why a lot of other fuel pumps put out more than 5 psi but I don't use them.

 

[Bandit723]

Well i did have a carter pump at one point. It broke badly. Just saying.

 

[1980RS]

If you have any Eddy carbs that hesitate you will need to pull the top of the carb off and unscrew the squirter and make sure the ball and other little piece in there are free. I don't know how many I have found that the ball will stick in the hole where is seats because of the use with the crap gas we have. Also on most Eddy AFB carbs the squirted is too small .028 and I open them up with a pin drill to a .035, it cures about 90% of the hesitations I have encountered with those carburetors.

 

[need-for-speed]

I switched from a 650 AVS,
The problem with my old 650AVS was a off idle stumble that no matter what, you had to use more timing AND A fatter idle mixture...according to my wideband to help cover up the stumble. Different acc pumps. pumps shots, ect did nothing here. And I truly believe Edelbrock knows the issue, that's why they revised the style of booster they used for the AVS 2. Anyway, the fatter idle mixture along with as much initial timing you dared to give it left you with a nice exhaust stink at a stoplight and about a 12 or 13 to 1 ratio at idle. So basically, an incomplete burn.

The new 650AVS 2 has a different style of booster that not only eliminated that flat spot stumble off idle, but as a result lets you turn those idle mixture screws in to achieve ...on mine..14.6-15.5 to 1 at idle, hard to get a rock steady idle reading with my cam. But now with no hesitation when I let out the clutch and step on it. No more headache from the stink after you drive the car for more than 10 miles in traffic. I'm amazed how all sorts of people on all different forums think that the idle stink is just part of driving a 70's car.
In fact now, it feels real close, seat of the pants to a FI set up.
I bought the AVS 2 based on real world owner reviews of application,and trying to separate them from just opinions

Jeff Smith was right about this one: From 3:50 to 7:00 he explains on the video

Thanks Kenny! I too have a 1406 with the classic Eddy off idle
stumble, and have masked it as much as possible with using the largest pump shot nozzles, fatter main circuit. The downside is the same ol rich stinky idle as reported by sooooo many. I did replace my distributor with one with vac advance, connected to direct manifold vac, and that helped some with the idle stank.

I have a new 1906 AVS2 ready to go for my new 383 build as soon as I get off my ass and get er done!

As you probably know, many on the other car sites have reported the very same improvements and drivability that you have. Thanks again for the detailed response.