Thread: Edelbrock intake manifold + rochester carb....

Could you adapt an lpg snorkle thingy from the carb to the airbox?

Whats the plan going to run the county down calder

Well......I was doing some reading up on mods to improve the little 3.5.

The 3.5 in the county is a low comp motor, but the one out of the pig (in the shed) is high comp.

With a high comp motor and a stage 2 (I think) cam shaft, ported heads with oversize valves and the edelbrock manifold and rochester carb you can get around 250 HP from a 3.5.

The 3.5 is a great little motor in my opinion and seeing how I have one in the shed I thought I would do something with it rather than just toss it out.

Calder might still be out of my range.....but 250 horses is more than enough for me.

Can anyone shed some light on the performance of the rochester carby in off road conditions. Does it suffer from flooding problems like the holly does?

Mick, look for a holden 308 filter housing and modify the end of the trumpet to take a hose of the diameter you require. Havent used one myself but ie that they are much better than a holley offroad.

I have a Quadrajet on an Edelbrock manifold on my 3.5 Rangie. I removed the efi to fit it. The carby will work at all angles you can dirve at without the car falling over. Cant tell you about clearances in a County but when working out the fit for mine I forgot about the square to speadbore adaptor so my chosen airfilter is a very tight fit but it does fit with the bonnet closed.

ian

Originally Posted by D110V8D

Can anyone shed some light on the performance of the rochester carby in off road conditions. Does it suffer from flooding problems like the holly does?

The Rochester Quadrajet is an excellent carburettor, probably the highest development of the carburettor. It has small primary throats and quite large secondary throats. Depending on model, the theoretical maximum flow is from 803 to 850 cfm. Total thoat area is greater than (3) x 2" SU's. The float chamber is small and centrally located and can cope with quite steep angles without problems arising. For extreme off-road use, a plastic spacer or packer is available which limits fuel volume and prevents much fuel "rush away" in extreme angles or sudden braking or acceleration. Get the book "Rochester Carburetors" by Doug. Roe and Bill Fisher, HP Books, P.O. Box 5367, Tucson, Arizona. This book has a section covering preparation of Quadrajets for off-road racing.

Did you win the Edelbrock manifold that ended on ebay last night ?

No I missed it....was on my way home from a huts thing.