Thread: Carb upgrades for Rover V8's

Originally Posted by bacicat2000

Hi, a carby & manifold change are high on my list as well, just a couple of questions: - If using the Quaddie, do the jets need to be changed? I did this conversion on a holden 253 many years ago, and dropped the jet sizes a bit to get the best out of it. - Does anybody have a manifold/carbie for sale that would suit this conversion? Also, if I go down the HIF-6 SU path, can anybody advise on where to get one of these from - I haven't come accross these before. Lastly, does anyone have an opinion on a camshaft that would suit this configuration to get a bit more from it - nothing extreme, I still need it to be driveable.

Cheers.

I have fitted Quadrajets ex Holden V8's to Valiant 265's amd one Range Rover without any changes whatsoever and they just started up and ran OK. Just had to adjust the idle mixtures, and later, fiddle with the opening of the vacuum secondaries to suit personal requirements of the owners. I have fitted them twice to red Holdens with an adaptor plate that blocked off the secondary throttles. Same result. I suppose you could use an exhaust analyser and change jets if required.

Hi Clarkie,
If your budget will stretch to it a new Weber/Edelbrock 500 is a good bet. RPI in the UK have the full kit with linkages and manifold for 850 quid. It doesn't have the starvation issues at high angles that the old Holleys did.
Years ago I fitted a Carter 400cfm to my old 82 classic - It went well but I never managed to get it set up and jetted correctly (4 barrels a black art in the UK) Fuel consumption around 8 mpg or 30l/100km.....!

Originally Posted by bacicat2000

Also, if I go down the HIF-6 SU path, can anybody advise on where to get one of these from - I haven't come accross these before.

you need two...



they show up on ebay regularly

they bolt on where the strombergs did and you have to modify a couple of things but not a lot.

you also need to fit a fuel pressure regulator as the su's dont like to much pressure on the fuel inlet side.

Thanks Incisor - you'll have to forgive my ignorance, I have been away from 4WD for a long time, and am a newby to Range Rovers. Motor bikes have been more my thing for a long time before this came along, now I'm hooked.

This looks like an easier conversion as well, as the manifold can stay put.

Cheers.