Thread: a bigger engine in a 101?

Originally Posted by garrycol

I can ask on the UK 101 club site if you want me too.

Garry

Responses from the UK site:

"Did it a few years ago. Best thing I have done to it, manifolds are a straight fit."

"3.5 heads will fit, but you'll be short of the bottom four bolt holes in the block. The block itself is physically the same size as the 3.5 so fitting it won't be a problem. Personally I'd be more inclined to put some sort of efi on it, you'll be able to get more from the engine with electronic control than just using carbs."

"what about using 4.6 block and heads, but putting a performance 3.9 cam, and 3.5 front cover and timing gear (you can use the 101 oil pump), the 101 manifolds will fit and put SUs on it"

" It would be silly to downgrade to the original 3.5 101 oil pump! Stick with the better newer one! The 3.9 front cover and oil pump i fitted to mine keep the oil pressure loads better than the 3,5 one did."

"Real Steel do a high capacity uprated pump for the Rover V8 for not too much money. Definitely worth doing that. Their Viper Cyclone cam works well too (got one in the RRC)."

These are the comments so far - one of the posters who has done the conversion is happy to accept PM questions - so let me know if you want me to PM him with anything.

Cheers

Garry

Iain,

Some more comments from the 101 club - now beginning to wander off topic but some points may still be of interest.

"4.6 manifolds fit from stock without fettling? What's the rest of the exhaust system like/from to mate up to them?"

" I think he means you use the standard 101 3.5 manifolds. Good ole mix and match of V8 bits."

" Carbs and the like will bolt up onto a later engine without issue."

" Yeah, stick with the 4.6 heads and just move the intake manifold and carbs over from the 3.5. If they are stromberg carbs however, you will have trouble running them on petrol. You really need SU's to be able to tune them enough for a bigger v8. Ive got a 3.9 in mine, which has the 3.5 intake and exhaust manifolds on."

"If you are going to increase the engine's capacity you really ought to look into uprating the brakes too. They are only just about up to the job as it is!"

If there are any more I will pass then on.

Cheers

Garry