A question for the petrolheads

WIll 3.9 heads fit on a 3.5 block?

And whats the crack with swapping the EFI for carbs, is it even possible? Answers on a postcard lol cheers chaps!

Its only been in there 6 months and already scratching my head and planning on stripping it apart

Ask Nilo, I think he did EFI to carbs. As for heads, not sure.

i thought heads was same, it is just block bore bigger, efi part no idea

I think heads will swap as the blocks are the same on 3.5 and 3.9,as for the carbs you'll need the inlet manifold as well also the efi fuel pump will have to be changed as its a high pressure one and will be no good with the carbs.( paddocks do the right one for about £50 )

heads fit can either change carb inlet manifold or put the efi inlet manifold on .. efi supposed to be better as long as u got everything put that on ,, you will notice a massive difference with the 3.9 heads on .

Had a 3.9 EFI rangey and that was absolute pants. Quite like the carbs cos it sounds lush!

Will have a look for some 3.9 heads and go from there

had everything you needed a year ago always the same after least it not couple of weeks lol

i find that mine is not as quick as the 3,5 i had

try putting a disco transfer box on it mickey much better ratio

thanks nilo, amy idea what 1, as mine auto and only got high and low, od dont that matter

I put a disco one on mine after the internals collapsed lol I dont think it appreciated being booted up the ass by the v8 all the time lololol

Bang a 6 to 1 transfer box on it power sorted even runing 38s

idratherbesurfing wrote:

Had a 3.9 EFI rangey and that was absolute pants. Quite like the carbs cos it sounds lush!

Will have a look for some 3.9 heads and go from there

If you can't get any 3.9 heads try and get a pair of rover SD1 3.5 ones as they were modified from the factory and give lots more grunt.
If its more power you're after it depends on what 3.5 you've got because there are lots of different versions,for instance if its from an early disco or 90 it will be a low compression engine (8.13:1) and about 90 bhp and absolute crap! or if its out of a rover SD1 like mine in the series it'll have a 9.35:1 compression ratio and about 160bhp as standard and go like a rocket!

ill shut up now with the petrolhead talk