Advice required 45DCOE for MGB

I'm certainly no expert, but from what I've gleaned, a DCOE is wretched overkill for any but the most heavily modified engines. If you haven't matched the flow capacity of the head, cam, and exhaust to that of the new carb, the potential of the carb will be wasted.

That said, I'd expect that if you haven't changed the distributor, then it will still need whatever it needed before the carb switch. You can probably run without vacuum advance, but I would expect the result to be sub-optimal, and for sub-optimal results, why go to the expense of fitting the DCOE?

What year it the car? Did it originally have manifold vacuum to the advance or ported? That will determine how you will need to hook it up on the new rig.

Sorry to not be more optimistic about it! :-(

The engine is a 1972 with vacuum advance. Head is a Downton stage 1 with the 'bunch of bananas' MG club stainless exhaust manifold.

Had a note from a chap in California saying don't use the vacuum a/r line. He also sent the address of a good site -

- that gives tips. Looks like I've a fun time ahead...

Thanks all

Mart "Declan MacLeod" wrote in message news:declan snipped-for-privacy@news2-ge0.southeast.rr.com...

Why? You'll lose a fair chunk of the driveability, 10 mpg and get very little more power. The twin SUs fitted as std are excellent carbs on that application.

Yep

Just looked at the tuning book and at stage 6 - 10.5 CR this is the difference between SU's and a 45DCOE

Dave Hi,

Just been looking at your web site, its superb information, but would prefer to see pictures and diags too.

Well so would I. If you're volunteering to create them and rewrite all the web pages I'll be jolly grateful. It's taken hundreds of hours over the years just to write what's already there and much as I'd like it to be better still there are only so many hours in the day.

-- Dave Baker - Puma Race Engines