Thread: edelbrock manifold conversion

I put those on my rangie when it had a V8.

It was the worst thing I ever did.

Those carbies are rubbish off road. They flood and are very difficult to re-start on moderate hills.

I took it off and replaced with a Quadrajet of a Holden V8 - a much better carbie off road.

Personally I would go back to the stock carbies, you won't get better off road - they will nearly run upside down, and will still keep going down to 300 rpm (which can help you keep going in some situations without stalling and getting stuck).

Quadrajets are very suitable for off-road use. They have a small centrally mounted float chamber which permits operation at steep angles. Rochester recommended a modification for this usage by inserting a plastic packing piece in the float chamber. Many later Quadrajets already have this in place. Quadrajets were widely and successfully used in off-road racing in the USA.

Edelbrock do a kit for offroad use, simple to fit or you can use their marine version of their carb. When I fitted the 1404 and Performer to my 4.6 I used a thermo housing off a P6B Rover which has the necessary extra by-pass outlet pipe needed to return coolant to the sytem before the thermostat opens - cost $5 from the wreckers.

I use a 350 holley on my classic but it's backwards so it floods downhill, not really a problem.

Hey Guys,
I thought if you wanted to put the quadrajet off a Holden on you had to modify the carbie as it was made for a 5 litre engine not a 3.5 is this correct or not.
Cheers Kris

Originally Posted by British Bulldog

Hey Guys,
I thought if you wanted to put the quadrajet off a Holden on you had to modify the carbie as it was made for a 5 litre engine not a 3.5 is this correct or not.
Cheers Kris

They were used on Holden 253's as well. I have installed them on Hemi 265's, Holden 186 using only two throats, Rover 3.5 V8's, and Leyland Terrier trucks without changing jets. They usually start up and run like good little watches after minor fiddling with the idle screws. You may have to adjust the opening of the secondary throats if they are coming in too early and a small engine is bogging down with too much venturi.

Originally Posted by coops71

I'm in the process of removing my factory manifold from my 1988 V8 110. It was converted by the previous owner to allow for a 2 barrel carby. Currently it has a 350 holly. I am going to replace it with a edelbrock performer manifold and a 500 edelbrock 4 barrel. The idea is to eventually replace the 3.5 with my 3.9 and do some head work. My question is: Can I use the original thermostat housing and the pipe connector on the back of the original manifold. I can't quite get my head around the RPI nescessity of having the new housing. If someone can shine some light on this matter I would really appreciate it.

I've got elbrock duel plane manifold and a 470 doubble pumper on a 3.2. good little goer never had a problem with fuel starving or flooding and its just not a shopping trolly no sand dunes in car parks as for thermostat housing I use the original and use 10mm flat ally plate to make an adapter this was the cheapest way out cost about $10 and a bit of time drilling and measurring up.
Dan

Originally Posted by NOFUSS

I've got elbrock duel plane manifold and a 470 doubble pumper on a 3.2. good little goer never had a problem with fuel starving or flooding and its just not a shopping trolly no sand dunes in car parks as for thermostat housing I use the original and use 10mm flat ally plate to make an adapter this was the cheapest way out cost about $10 and a bit of time drilling and measurring up.
Dan

Did you drill and tap a hole for the bypass? What did you use for the bypass pipe?