V8 guys, Is this an AMC block?

[asphaltgambler]

The Edelbrock carbs Do have one good thing going for them. You can take them out of the box and with no tuning, bolt it on top of almost anything and it will probably run ok. And for some people......that's enough.

The Holley is the same way, but way better if properly matched to the application. They are usually shipped a little on the 'fat' side on primary jetting the vacuum secondary spring is very heavy which causes delay in opening. But for this vehicle prolly about right you may have to step down 1 or 2 sizes in main jet for altitiude.

[thingmon]

Some engine code info. Of course, if it's been swapped, all bets are off...

Jeep VIN Decoding, 1962-1992

Not for nothing, but my dad didn't like these trucks one little bit. A company he worked for in the late 60's used them and they broke down a lot. Cool looking though. I remember having a Tonka Gladiator. That one was pretty reliable. ha.

Go TBI!

[RANDY P]

Originally Posted by Laneco

Asphaltgambler has quite a bit more experience than I in this area and I would tend to go with his judgement above mine. That said, my experience with the Edelbrock 1406 with the electric choke is quite good. I had one my SBC converted Jaguar XJ6 that was a daily driver for about 5 years (no longer have the car). Zero issues. I put one on the 330 horse 350 in my Dad's Monte Carlo SS about 3 or 4 years ago - zero issues (still have the car). With the 330 horse 350, this carb is pretty much tapped out - borderline needing the next size up. We have one on the 72 Blazer that is still in "project car" phase. That one had the car put on a couple of years ago and is only fired up every few months to move it - but again ZERO issues.

I would recommend a fuel return line off the pump which is hopefully already in place, but may not be as that looks like a pretty early 70's truck. That along with a phenolic spacer pretty have cured any hot start issue I've had with this carb setup.

So would I buy another? You bet. Yours has a problem that is likely related to fuel/varnishing/stuck needle valve, etc. This vehicle will never get GOOD mileage, but it should get something fairly reasonable - certainly in the low teens.

angela

You used the TBI pump + return line on the Monte...

That's why the vapor lock was minimized to only parked. With a mechanical pump siphoning the reduction of pressure will make life a hassle.

rjp

[Laneco]

Originally Posted by RANDY P

You used the TBI pump + return line on the Monte...

That's why the vapor lock was minimized to only parked. With a mechanical pump siphoning the reduction of pressure will make life a hassle.

rjp

That is not correct. An 87 Monte Carlo SS is carbureted, not TBI, and the fuel pump on that factory 305 is in the standard location/configuration, lower passenger front. I've still got the carb in a box - believe it was a Rochester. There was some concern that the stock pump would not deliver enough fuel for 330 horsepower (this engine was 180 or so stock). So I removed it and installed a mechanical pump from an early 70's big block A/C equipped Chevy. I'd have to dig the receipt up, but I think it was from a Chevelle circa 73 or 74.

If it had a later TBI fuel pump, I would have definitely reused that.

Asphaltgambler? You're dead right about the idiot-proof-ness of the Edelbrock. I swear that a freakin' monkey can slap one of these on and the engine will run/drive with zero adjustments. It is startlingly easy.

In the carbureted hot-rod world, there are Holley guys and people who hate 'em. Me - I don't have a dog in the fight as far as Holley goes. I also have no experience with them. I've used Edelbrock on multiple cars and I have zero hot start, zero cold start, zero drivability issues with them. If this car isn't running right with the Edelbrock, the symptoms you describe are not inherent problems with the carb, they are a "problem" with the carb itself that requires a repair. Cheap way out of this problem is to fix the stuck/gunked up etc., part rather than replace anything.

angela

[RANDY P]

oops, you are right. Carbed and CPU q-jet....

[petrolhead611]

I have an Edelbrock 500 on my highly tuned Rover V8 engined car and that is enough carb for 300 bhp on the dyno. The carb ran the engine straight from the box but it took way more than an hour on the rolling road to get it jetted suitably for mid range as well as WOT.

[rsNINESOOPER]

Everyone has an opinion- here's mine

Nothing wrong with the Edelbrock carb. First thing is to take the carb off and install it with a phenolic insulator between it and the intake manifold. That should solve any hard start/boiling fuel issues. Put a fuel filter in line to the carb and check fuel pressure, as others have said the carb is sensitive to what fuel pressure you have (check specs Edelbrock website). While you are in there visually inspecting the needle and seat do yourself a favor and write down what jets, air corrections, venturis are in it. This will help diagnose any issues later without guessing or taking the top off.

Obviously check timing and put a good ground strap/s from block to battery to frame as this almost always needs to be done to ensure a good hot spark.

Get AAA and drive it

[Oracle]

Originally Posted by Nostril Cheese

Based on the driveway, yes I bet it is an AMC block ;-)

[red-beard]

Originally Posted by Nostril Cheese

Edelbrock's website lists the 1406 as a 600cfm. Im not sure whats up with the thing because it drinks fuel just at idle. Like half a gallon of gas in 90 seconds.

Sounds like a bad float.

[hardflex]

I"m wondering if the fuel pump diaphragm is ruptured dumping fuel into the crankcase.

[Laneco]

Dang - NOTHING worse than a leaking diaphragm...

angela

[Nostril Cheese]

Got a spacer and a new needle and seat for the carb. Gonna tear into it today and see what I find. Pulled the dipstick and dont smell gas.

[Dansvan]

Look at the side of the block down under the heads. Large numbers. Will say 304, 360, 401 etc. all amc engine share the same external dimensions.

[red-beard]

Originally Posted by Laneco

Dang - NOTHING worse than a leaking diaphragm...

angela

I remember this girl. She could sing...from her diaphragm!

I mean, that would take years to learn, wouldn't it?

I had this 76 Cherokee Chief with an AMC 360 except in a desert tan. AMC owned them at the time and supplied the engines. It was a real horse and I loved everything about it except the crappy factory carb that was always ran like crap. Wish I had it back right now!

[johnsjmc]

You should read the Edelbrock carb owners manual .It,s available on line from Edel tech cen.
Before pulling the top to change the needle seat try the steps on pg 6 re flooding .Tap with a rawhide hammer and the pinch off the fuel hose run the carb dry and just before stalling release the line to try and flush any debris out first. If you do pull the carb apart , float level specs are also in the manual . detailed tuning info is also there as well as original jet sizes and needle specs. A very detailed booklet .

[mreid]

Don't listen to nay Sayers on Edelbrock. Know what this is?



That's right, my 1941 Willys coupe. Look closely. That's a 502 Chevy engine with two of your carbs mounted on a Weiand tunnel ram. Talk about a tuning challenge! This bad boy put about 450HP to the rear wheels. Anything can be tuned as long as it ain't broke!

[Nostril Cheese]

Im not putting a Holley on it.

[johnsjmc]

Originally Posted by Nostril Cheese

Im not putting a Holley on it.

The Edelbrock is a copy of the same Carter AFB which was standard on the famous 426 street hemi too.
I,ve had good results using them as well as a Holley.

[Nostril Cheese]

I've never had a good experience with a Holley. My favorite 4 barrel carb is the Autolite 4100.

Got the carb off. Needles and seats were wasted. Carb full of gunk. Rebuild time.