Twin 38 DGAS Carburettors on essex V6

[rsh]

Can anyone suggest jetting for twin 38 DGAS Carburettors on essex V6 ? Engine is similar spec to the power charts on www.essexengines.com which suggest 142/145 mains 160/160 air which I tried but wasn't happy with. Will get on a rolling road eventually but as local tuners don't carry jets will have to supply a selection. Anyone using the old Car Clinic manifold ?

Edited by rsh on Friday 14th December 08:34

[rsh]

Geoff38 said:

just out of curousity , what do the three spherical bearings do on the top of the manifold ??

Cheers
Geoff.

It's for the balance bar that holds the linkages for the carbs.

[rsh]

Great suggestions guys but don't forget twin carbs = 4 main jets and 4 air correction jets to drill - solder , which is why I really like to hear from someone who has actual experience with this combination first. Real world numbers please ...

http://thumbsnap.com/sc/LiI2TW9d.jpg

Edited by rsh on Tuesday 18th December 08:44

[rsh]

TaimarTurbo said:

But No-one is going to know exactly what jet sizes etc you need, you'll have to find out for yourself.
Even if someone would run the same carbs and manifold, you'll find your combination will require a different jet setup.

Edited by TaimarTurbo on Tuesday 18th December 12:16

Well duh, state the obvious, of course nobody will know exactly what jet sizes I require, my request is simply to get some numbers and find out which way the jetting sizes went, dual carb compared to single carb. Once I have some data, I can continue my testing ... and I'll be happy to share the results.

[rsh]

TaimarTurbo said:

A quick google search yielded the following.
Note I didn't check any of this, so your guess is as good as mine whether this is correct.
I still don't know what you want with this...

I might not have made it clear but I'm asking about a twin (two) carb configuration, above settings are for standard single (one) carb factory configuration, the settings for which are readily available from your trusty Haynes manual or Google search. When you go from a single to multiple carbs, you need to make some changes, Essex Engines very kindly share their settings, was hoping others would also.

My mission continues, the truth is out there somewhere

[rsh]

Adrian@ said:

Carb settings aside for a moment...one of the things that I now noticed (as I could not see the picture properly until now) is that I would want to be changing the valve spring retainers for the later version, as the older version you are using can fail.
Adrian@

Thanks Adrian, will investigate further.

[rsh]

Thanks for all your well intentioned comments, I'm well aware of all the points raised above regarding differences between engines. I was just after some insight into whether the jetting went bigger or smaller on mains and a/c (on the Essex Engines combination I refer to above, mains = std, a/c = smaller which seems counter intuitive).

Responses to this thread remind me of the time I dared ask about spring rates ...

[rsh]

no, never got them running satisfactorily, sitting on the work bench now, what jets worked for you ?