Upgrading a 77, with a Weber 38ADLD 150

[coise]

I need some help on what to do if I want to upgrade my 77 spider with a Weber 38 ADLD 150 . Unfortunately my car has the accelerator linkage with the ''drum and spring'' type.
What do I need to change if I want to install a 38 ADLD?
Thanks for the input

[BEEK]

you need the cable, valve cover and linkage mounted to the valve cover and the rod from the twist linkage to the carb. it is a very simple change

[coise]

Thanks, Beek
What cable type should I get?
Also sorry for my ignorance what do you mean by "rod from the twist linkage to the carb"?

Thanks again

[coise]

Here is what I´m trying to do:

http://www.mirafiori.com/faq/content/we ... 38_adl.htm

I found a 38ADLD150 in Italy and my car is in France, so shipping should not be so bad.

[coise]

Just and update.
I install the 38ADL (primary 175 secondary 200) on my 77 and what a change!!!!!! this thing is nuts it has lot more power than my previous 34ADF.

The only thing is that at idle the engine runs a little ruff. Any idea on the ruff idle at around 1000RPM?

I have to inform you that I have adjustable cam gears with 40/80 cams, high compression pistons a 4/1 manifold with 2.25 exhaust system, and Mark's distributor less system set at 12 degree advance.

Thanks for any input.

Coise

[131lover]

Hi!
Why don't you put on 2x44 IDF with with those cams and exhaust,it would boost power!
Cheers
Alf

[toplessexpat]

The only thing is that at idle the engine runs a little ruff. Any idea on the ruff idle at around 1000RPM?

Isn't that a function of the cam as opposed to the Carb? My 38ADL idles smoothly.

A

[coise]

Thanks for the inputs.
2x44IDF is not an option for me, I use my car in the summer only and I don't want to spend my time tuning it every year.

As for the cams I will try to tweak the timing a little to see what happens. Maybe not enough overlap...what do you think?

This carb is great specially when the secondary barrel opens up it feels like a turbo

Salut

[vandor]

You don't say what your idle jet size is, or if you tried adjusting the idle mixture?

[coise]

Primary is 200 secondary is 171, and yes I tried turning the idle mixture screw. Also the carb is brand new unused old stock.

[toplessexpat]

This carb is great specially when the secondary barrel opens up it feels like a turbo

Precisely the reason why I keep mine and refuse to move to dual 44's like a friend of mine has

Jetting (like Csaba says) is also a potential. I seemed to have to back out the mixture screw further than I'd anticipated when I set mine up - however - it runs just great, isn't overly rich, and is fun.

Perhaps the timing could be tweaked, do you have adjustable cam gears?

Finally some sport cams just have a lumpy idle... what does the manufacturer of yours say?

A

[vandor]

Primary is 200 secondary is 171, and yes I tried turning the idle mixture screw. Also the carb is brand new unused old stock.

Hm, those sound like main jet sizes, idle jets sizes are usually in the 50-60 range, or thereabouts.

[toplessexpat]

Aren't those jets the wrong way round?

Primary 170, Secondary 200??