Weber Carb Advice

[67GTA]

Hello,

I am strongly considering using Webers on a large V8, 482 cubic inch V8 and could use a little expert advice. The engine will be a street motor, sometime track motor. Power band up to 6,000 or 6,500 RPM

The engine is a stroked 427 Ford SOHC and I have the complete engine, except pistons, valves, cams, and induction. I am hopeful I will make over 600 HP, probably closer to 650 with a compression ratio a little above 10:1

I would like to use Webers and I do not find the idea of making my own manifold intimidating.

My thoughts are to use one of the following Weber type carbs;

1) Berg 58mm IDA's (Not readily available, but hopefully in November)
2) Jay Cee 62mm IDA Terminators (About a one month lead time)
3) 55mm Weber DCOE (ideally with the bore machined out to 58mm; if possible, I am still researching this)
58mm DCOE (Does not seem to be obtainable)

My first choice would be the DCOE, because of several reasons
1) Hood clearance should be a little better, maybe 1.5 inches once you add air cleaners.
2) The manifold can have a more pleasant flow into the intake port and can be longer
3) I have more flexability on air cleaner selection and size.

My questions:
1) If I can get a DCOE bigger than 55mm, is this setup more beneficial than an IDA.
2) Does anyone have any advice on cam selection.
3) Is there a benefit in tuning the length of the intake tract in an IR setup of this nature.

Any advice would be appreciated.

Jim

[Cammer]

Weber carburetors on a V8 engine give up much to other induction choices.

I do not believe your cammer engine will perform well with 10:1 compression ratio pistons. This choice seems counterproductive in light of this engine's hemispherical combustion chambers.

Back in the day Crane camshafts were used in many 427 SOHC engines. You do not provide enough information to elicit more concise camshaft information.

Best of luck!

[67GTA]

Originally Posted by Cammer

Weber carburetors on a V8 engine give up much to other induction choices.

I do not believe your cammer engine will perform well with 10:1 compression ratio pistons. This choice seems counterproductive in light of this engine's hemispherical combustion chambers.

Back in the day Crane camshafts were used in many 427 SOHC engines. You do not provide enough information to elicit more concise camshaft information.

Best of luck!

I have been told the cammer engines in general did not all have the compression people thought they did. The actual compression was probably a point or two less than advertised for most engines. So 10.5:1 as a max in my engine is probably not too bad if this is true.

I'm curious what induction can beat the Webers, except for a port efi, I have a hard time imagining something better. Most of my reading is limited to DV and several other authors and a well tuned set of Webers seem like a good idea.

Crane made a lot of cams for the cammer and they are all still available, some of the other cam grinders still have grinds also. their is also a fair supply of new cores, so it should be pretty easy to get a set of cams made. Mostly at his point I am curious what type of duration people generally run with Weber carbs over 4 barrel carbs for high HP street & track motors; but I should probably get my heads fit with valves and flowed so that I have some more info to share.

Regards

[Cammer]

You seem to have the information needed for your build.

Good luck with your Webers and low compression engine.