Practically Classics Forum

I'm getting to the stage of fitting an inlet manifold and carb for my MGB GT Rover V8 conversion. I was planning on getting a Edelbrock inlet manifold along with an Edelbrock 390 or 500cfm 4 barrel carb.

However, I've read a small bit on, and been told that if I have my original rover V8 SU inlet manifold and get the SU mounts cut off, I can weld a plate onto the top and fit a 2 barrel carb from a Ford Capri V6 motor with similar results.. The issue is U can't find much online about it.

Has anyone done this inlet configuration or know someone who has?

Many thanks.

Have you considered fuel injection?

Yep, but want the car to be retro so don't want it.

The Edelbrock setup is well known and well respected. The only reason that I can see for going with the Ford based setup would be cost, I would imagine

The question is, why would you want to? Not trying to sound like a smart-ar5e but the 3.0 V6 Weber carb has 2 x 38mm throttle butterflies which equate to 1.5" - would you want to remove the SU HS6/HIF44 or Stromberg (as fitted to late SD1 models) 175CD carbs, all of which are 1.75" and replace them with a pair of HS4s or 150CDs?

Going back to when Rover first used the Buick lump in the late 60s, the original carb was something along the lines of a Rochester or Holley that i believe had 4 barrels. When Rover fitted the twin SU set up they got the same power out of it without any other modifications.

I'm guessing one of the major reasons for this idea is for space/bonnet clearance as you're probably using an SD1 or P6 engine with the carbs where they normally sit? My advice would be to either source a second hand (or new! ) MGB V8 inlet manifold or have a look at these links for some more useful information :

http://www.mg-cars.org.uk/v8_conversions/rogv8.html

http://www.vord.net/cars/mgb_mods/engin ... uretor.htm

http://www.classic-car-mart.co.uk/news/ ... er-v8.html

http://www.v8engines.com/carbs-1a.htm

If your dead-set on fitting Webers on a budget, how about fitting a pair of Ford 2.0 Pinto Webers? Considering what i've just said that might sound daft but they are 32/36 on the primary and secondary chokes respectively. This gives just over 1.25" on each on normal running so plenty of torque and economy then when you floor it, the second 36mm chokes (just under 1.5") kick in for a lot more power probably very similar to the Weber 500 in the last link. Only thing is for the messing about involved, it would probably be cheaper in the long run to fit a Weber 500 and have done!

Hope that helps or at least gives you some ideas!