Rover V8 forum ?

[VladTepes]

Originally posted by Hellspawn
Twins are only for show ? Only when they're on a WRX.

Yeah, sorry coz I know this is in the technical forum but I simply can't resist.

There are plenty of fun things you can do with twins. :wink: [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img] 8)

[Hellspawn]

Originally posted by VladTepes

Yeah, sorry coz I know this is in the technical forum but I simply can't resist.

There are plenty of fun things you can do with twins. :wink: 8)

Not sure what you mean Vlad, what sorts of things did you have in mind ?

[Bigbjorn]

That is interesting ! - I will check some datails conc "welding up the combustion chambers"...that's very interesting !

Inlet manifold: providing 4 brl, easy to tune and economical carby is desired, I can choose: Weber 500 or Edelbrock 1404 (500ccm too). (Weber 500 is actually the same or almost the same as Edelbrock, Weber belongs to Edelbrock, but Weber has excellent "name" in Europe, so its sold there as Weber, not as Edelbrock). Holley - not for off-road and too hard to tune. There are some less known (Rochester, Carter), but I don't know details...
Mentioned Weber 500 or Edelbrock 1404 need Weber inlet or Edelbrock Performer inlet (the same again?) or Offenhauser inlet.
I don't know any other to fit with those 2 carbys.
Or am I wrong ???
adam

Hoilley 350 is a cooking carburretor, one size fits all. Holley 500 is a performance carburettor, don't expect economy. Twin throat twin stage Holley is a copy of a Weber. Piece of s--t, both of them. Big four barrel Holleys are popular with drag racers and hot rodders/ street machiners because the main jets are easily accessible and can be changed readily. Rochester Quadrajets are probably the best big engine carburretor ever made, and the next best thing to fuel injection. Rebuild them by the book, will take you a day first time, set the idle mixture and speed, and then BLOODY WELL LEAVE THEM ALONE!!!. Like SU's they give no trouble except when *****s fiddle with them. A quadrajet has more venturi area than three 2" SU's. I have had them on Valiant 265 Hemis and they drive around the traffic like little lambs, but stick your boot in and when the vacuum secondaries open, hang on.

[amtravic1]

I am running an Edelbrock manifold and quadrajet on a tired 3.5 89 Rangie. Would recommend this to anyone. To those who question the set up over efi I say you have not tried it.

Ian

[Larns]

My mate is about to change his twins for a holly 320, this is the cheepest and hopefully most economical step to take. As the standard set up is chewing around 18-24ltrs per 100km. Has anyone changed the pionts ignition to electronic? I've spotted a 94 ish disco in the wreakers, and it's got me thinking..........

[mango]

I am running an Edelbrock manifold and quadrajet on a tired 3.5 89 Rangie. Would recommend this to anyone. To those who question the set up over efi I say you have not tried it.

Ian

Whats the benefit of running this setup over efi? Economy? Power? Reliability? What if the standard efi is running as well as it can. I'm just curious. Cheers

Mango

[amtravic1]

Whats the benefit of running this setup over efi? Economy? Power? Reliability? What if the standard efi is running as well as it can. I'm just curious. Cheers

Mango

Well,
for me there were many advantages. The efi on my vehicle was unreliable and would rarely run well. I was never in the RACV until I got an efi Rangie but the top cover with free towing sure paid for itself quickly.
I had many well respected mechanics look at it but it was never right. Some days it would run really well some like a heap of rubbish. Even stopping at traffic lights and driving off could cause a change in the way it ran. To fix the efi (replace it with an aftermarket set up) would have cost around $3000 all up with dyno work etc. I already had a rebuilt quadret from the chev motor in my old Landcruiser so I bought an Edelbrock manifold and a few other pieces and had the thing running beautifully in less than a day.
The quadrajet is totally reliable, if it ever stops then I know where to look, it has to be fuel supply or spark. I always had the feeling the efi would let me down in a remote and very inconvenient place. I often travel on my own so this is important.
In the last 3 years the vehicle rarely gets looked at except for servicing.
When you do want to work on it the motor is easy to access with much more space around it.
In my case at least the vehicle has much more power,( for a 3.5) is more economical, smoother (yes you can feel the change in fuel mapping in an efi car as the speed increases, load changes), the car is quieter, especially electrically with no injector noise on my HF radio and is more economical.
Also, the efi set up is suprisingly heavy and the front of the car came up a little when it was removed.
Not everyone will agree with me, I dont care as I am happy.

Ian

[Ralf_the_RR]

Rochester Quadrajets are probably the best big engine carburretor ever made, and the next best thing to fuel injection.

Weber IDA
mmmmmmmmmmmm
much better

[Bigbjorn]

Weber IDA
mmmmmmmmmmmm
much better

Maybe for extracting the last nth of horsepower for out & out competition use, but not much chop for around town, off road, and occasional big squirts. Rochester q-jets, when properly installed, are a set & forget carburettor. A 4-pack of Webers are not. Q-jets combine total reliability with tractability, good economy, and super performance when called upon. The later models flow over 800cfmwith everything open and will feed big block V8's. They can be internally smoothed out & modified to flow a lot more for competition work.

Always remember that Weber and Marelli electrics are part of Fiat. That should put you off.

[mark2]

I've been offered a rebuilt 308 fitted with a a quadrajet. Its bolted to a rangie auto box and viscous transfer.
Comes with the box/transfer and all ancilliaries including electronic ignition, rover power steer pump and extractors for $1500. Auto box is OK but the transfer is damagedc. Have been thinking about this as a replacement for the 3.5 in my 110. I guess I would need to buy a full adaptor kit to fit it to my LT95 however. The adaptor to the rangie auto might be worth something however? Might be a better proposition than rebuilding my 3.5 and fitting a quadrajet to it? What do you guys reckon?