Twin 40's (Again!)

[Anonymous]

Hello again lads!

If you don't know by now I'm trying to fit some twin 40's on my re-con GTE engine. I've managed to get hold of the 1.6 manifold and alternator bracket, but still a bit confused over the following items that I need:

1 - lengthened alternator adjuster

Where can I get hold of one of these, or is it just a case of modifying the existing one?

2 - Adapter to connect servo to manifold

What's this all about, where can I purchase one from?

3 - Fuel pressure regulator

Is ther a specific one I need? where would I get one from?

4 - Jets

Anyone know what sizes I need?

End of questions. thanks in advance!

[Anonymous]

1. Mod 1 up or get another and join 2 together. You'll soon see when you come to tighten up the belt.
2.If you look at the manifold there will be a threaded hole at the end nearest the brake servo. The brake servo is worked by vacuum created in the inlet manifold. You need to connect the servo pipe into the manifold and you will need a male/male adapter to join the pipe to the manifold. Go to a scrappy with the brake servo pipe and the manifold to try and find something that will do the job.
3.Fuel pressure regulator = Purolator Pro Fuel. You can get them from anyone who does Weber etc. Demon Tweeks do them 4 less than ?20.Make sure you get 2 hose tail adapters with it. Cut the inlet fuel pipe into the carbs and plumb the reg. in. Set it to no more than 3.

4. To follow

[Anonymous]

Jetting for std 1.6 on t40's:
Emulsion: F11
Mains:120
Idles:45
Air corrections:F8
venturis/choke 30mm
Advisable : Airflow meter for balancing

This is a guide starting point. If the above means nothing to you get a book and find out how they work or go to a weber tuning specialist with a rolling road who will do it all 4 you.

[Anonymous]

Ive got twin 40s on a 1600head (on a 1400 block). My inlet manifold didnt have a servo adaptor but did have flat 'blank' in it which we drilled and tapped for the one on the std 1400 manifold we had there.. One thing to watch out for is that some inlet manifold castings dont cover the Exhaust Recirculation hole on the head (between 2 & 3 cylinder) meaning you might have to tap and bolt this to stop exhust gases and flames coming out :-)

I use a setup with twin red top fuel pumps in parallel (only 1 used at any time) feeding a filter king that feeds the carb inlets.