Thread: Carby kit?

Originally Posted by djam1

Try these guys

http://www.sumidel.com/

Quality products at reasonable prices.

SUMidel prices reasonable? God, I would like to know what you consider unreasonable!

Originally Posted by Bulldog

I'm told different carbys don't just bolt on... How hard is the conversion?

Correct, nothing else apart from SU's will bolt on, you have to mill the original manifold flat and then drill/ tap 4 holes so an adapter will bolt on.

Originally Posted by walker

If you want a Carby kit then I have one you can buy. I bought it for mine but never used it as I changed motors so you can have it for what I paid wich was $30

Thanks, but i'll need a pair of them and Moparts in Croydon has them for $27 each.

Also... i noticed your signature mentions a "1977 Range Rover now with the lot but soon to be scrapped".
If you mean scrapped for parts, please contact me. Mine needs plenty of bits and i'm a real 2nd hand kinda guy! Even if you mean scrapped as a working car, contact me anyway, i'm always looking.

Originally Posted by loanrangie

Correct, nothing else apart from SU's will bolt on, you have to mill the original manifold flat and then drill/ tap 4 holes so an adapter will bolt on.

SU's??? Is there a difference between Strombergs and SU's? Do SU's bolt on in place of Strombergs? My mate has some SU's off a done-up Datsun... Will they fit? I'm sooo confused.

There are a couple of tricks with old Strombergs.
1 If it has the silly valves in the throttle butterflys, solder them shut, as they are only there to reduce emissions,and they tend to stick open which gives a high idle.
2 If they are quite old, it may be worthwhile to buy a new main jet and needle.These are expensive but will do wonders for economy.

3 Otherwise strombergs are so simple That its hard to do something wrong.
Try to get an offroad needle and seat. It will have a light spring to hold the needle off the seat on corrugations.
Regards Philip A

Originally Posted by PhilipA

There are a couple of tricks with old Strombergs.
1 If it has the silly valves in the throttle butterflys, solder them shut, as they are only there to reduce emissions,and they tend to stick open which gives a high idle.
2 If they are quite old, it may be worthwhile to buy a new main jet and needle.These are expensive but will do wonders for economy.

3 Otherwise strombergs are so simple That its hard to do something wrong.
Try to get an offroad needle and seat. It will have a light spring to hold the needle off the seat on corrugations.
Regards Philip A

Is a "main jet and needle" the same as the "needle and seat"? The needle and seat comes in the kit so i might not have to much choice unless i buy a 2nd seperate set...

No, the main jet is under the lump in the bottom of the carb.
The needle is the thing that lifts up and down, connected to the piston . You can see the needle if you look in the end of the carby, and lift the piston up.

These are the key components of the CD carby, as the AF ratio depends on the distance between the needle and the main jet at each throttle opening, as the needle lifts up . As they get old they wear and the distance increases, therefore the fuel allowed through the gap is greater for any set throttle opening. It is adjustable to a degree but over time the wear is uneven.
I had to pass an ADAC CO test in Saudi with my 81, and the only way I could get the CO down was to fit a new needle and main jet.
regards Philip A

Brian
I suppose the point I make is that there are so many very poorly made parts for carbies out there that you are better off to buy something that is of good quality. Yes you do pay a premium but it is worth it in the long run.