Outer Limits 4x4 Board

My twin CD's are very sad and I have been quoted about $500 to tune / Fix them. I am actually thinking about replacing them with another carbie that I can tune, work on myself.

Im running a 3.5 ltr V8 and was hoping that there is a fairly reliable alternative to these. Any suggestions?? Was there another carbie that came out on these motors, or even P76 or something??

Looking for something that runs on angles fairly well as the car is a rock rig.

have heard good reports on the rochester quadrajet...

Cool. R these commonly available and do they mount up on same manifold etc. Looking for a quick solution hopefully

Pesky Pete wrote:Cool. R these commonly available and do they mount up on same manifold etc. Looking for a quick solution hopefully

You could always get a efi system and slap it on - it would be heaps better ? Just a thought


Tom

As my plant is 3.5 V8 too, I did some research and I am near decided to replace my Zenith-Strombergs with Edelbrock 1406. I expect very good results - response, torque, economy. BTW, Edelbrock 1406 is Weber 500 practically, but 30-50% cheapper. This is 4brl carby of course, so inlet manifold has to be replaced with Edelbrock Performer. They claim (Edelbrock) V8 gets new live with this set.
adam

The rangie carbs are simple to tune.

Only hassle would be later ones need special tool to adjust needle height in piston if you need to adjust main jet (early ones were external under bowl). I haven't tried, but it may be possible to make this yourself.

These carbs will run at nearly any angle.

When I fitted a 4.6 I changed to an edelbrock manifold and carb. I put up with the carb for a good while, but it was hopeless on an angle (and they are better than holleys. Got an adaptor and a Quadrajet from a holden 308, which is much better. These wont fit on the rover manifold.

P76 has a shitty 2 barrel and the manifold wont fit on a rover.

On a 3.5 I would stick with the original carbs. Over many years the only problems I had were diaphrams. If the Quadrajet hadn't worked out I would have gone back to the original carbs or the 2" version from a jaguar.

So whats involved in rebuilding and tuning them. I was under the impression that they were particularly tough to rebuild and tune

not much involved in rebuilding them... they are a really simple carby...

I've got SUs on my 79 4.4.
Basically the same as the strombergs, except no diaphragm.
Apparently they are exceptional at any angle.

Very simple to repair. I had mine apart for what I thought was a needle/seat problem (which it could have been) however, I ended up putting ATF in them and that seems to have cured all problems.

I have heard that jetting them is an art, with umpteen needles available.
Mine work, that's all I care about.

Have heard of a few guys using holleys, however I don't beleive they are good on steep climbs (or is it decents). They also must be installed backwards.
I reckon a weber from a ford would be a better option. Much easier to tune.

Stick with the original carb type set up.
I went thru the effort to convert to a 2 barrel downdraught. Modifying the manifold invloves some work...I ended up welding the adadptor plate on and milling the surfaces true again..handy that a good friend has all the equipment.
Lots of other stuff to sort out ie accelator cable, fuel lines..a air cleaner that fits unde the bonnet etc.
I used a 2 barrel stromberg, similar to what is on a 253 holden..but a manual choke version. The air cleaner was a heavily modified rover p6b unit mounted on the passenger inner guard that hooked up to the snorkel.
Didnt cost all that much in parts...scouring thru swap meets etc , but if I costed up my time and the machine work..well the$500 quoted for your repair doesnt sound too bad...and best of all the carbs work in all situations.

PS I dont believe that you can use a Ford Webber unless you have an open plenum type manifold...it is a progressive secondary carby...you dont want to run only half of your engine!!!!!!!!!!

I agree with melbrover, stick with the original gear.

I am not too favourable of holleys or any sort of aftermarket carb. I add the original carbs to the list of things NOT to touch on older Rangies. Personally I can't see tne problem with the old twin Stromberd CD carbies. Had 2 rangies with stock carbs and never had any hassles. Diaphrams are the common cause of problems though, but cheap and easily rectified as mentioned by others here.

But each to there own i say. If you can get it to work off-road, good luck to you

Regards,

Trav

Rebuild the Strombergs, they won't miss a beat, rounding out the near 90 degree corners on the inlet of the manifold with a big 1/2 round file doesn't hurt flow either, also if you get an extra pair of oval filter plates you can back to back them, holesaw through them both and sandwich a 3rd air filter inside the "muffler" to improve air flow heaps too.

Check your linkages well as due to a broken plastic bit I had one carby opening later than the other.

Rochester, LPG or EFI are the other choices that work on angles.

I've got footage of a Holley equipped Rangie that flooded going downhill, he inched it down on the brakes, the electric fuel pump overflowed the manifold with fuel, and when he tried to resartt the starter, instant fire, snatched the kids out of the back and watched it burn to the ground with his video camera. Silly thing was he was last in convoy and they didn't come back for him for another half hour.

For what its worth, I removed the efi from my 89 Rangie and replaced it with
an edelbrock manifold and quadrajet carby. Took about a day for the whole job. I got more power, total reliability and better economy. The quadrajet will work on all angles you will find yourself on and if it stops working you have probably rolled over. never a problem on hills, either up or down. It will cost more than $500 though unless you can get hold of second hand parts (manifold) cheap.


Ian

When I put the 4.6L short motor in my rangie, I replaced the carbies with edelbrock manifold and carbie.

Then replaced the edelbrock $%&&** carbie with a quadrajet, which works well enough for me.

But if I was still running a 3.5L motor, I would stay with the original stombergs.

BTW, I will be selling the 4.6L complete because I have just bought a 300Tdi to replace it.