BritishV8 Forum

Hi

I have the specs for the Rover engines from the 4.6 down to the 3.5. But I am wondering if any one can tell me what the Bore,Stroke, Cylinder Capacity, Compression Ratio, BHP and Torque are for the 4.9.

I have located a 4.6 and wonder if I should wait to find a 4.9 or go with the 4.6. I will probably run it as a carburated engine. Hopefully all my external stuff from my 3.5, headers, intake, oil filter conversion from D&D, etc will just bolt on.

Would it mate up to the tranny bell housing?

Thanks for any information


Bruce

I'm no expert, but I think you'll find that there are several possible component combinations for stroking a Rover to 4.9. From what I can tell, most people leave the bore at 3.70" (i.e. the same as 4.0, 4.2 and 4.6 Rovers.)

Check with Woody at "The Wedge Shop" for expert advice. His contact info is in our vendor directory. The Wedge Shop offers a stroker kit. Here's a photo from their website:



Your intake manifold and bellhousing should be no problem. Your 4.6 front cover will get replaced with an earlier cover, and THEN your oil filter conversion should work fine too. You'll use the earlier oil pan. You may want bigger headers...

3.7"? that's .050" smaller than a 300  or 340 block, so that crank would be about the same throw as a 300 crank. I've got two of those I need to get rid of.  Soon as I find boxes to ship them in they'll go on ebay.

That block should be able to accept a 340/350 crank. Clearance at the cam would be the issue but it wouldn't be as bad as what I'm dealing with using aftermarket rods. Imagine that, you could probably get about 331 cu.in. that way. What would that be in liters? 3.7 bore, 3.85 stroke. A .030 overbore should give you about a 336. That's be about a 5-1/2 liter motor. Can't imagine why somebody hasn't tried it already.

Jim

Hi Guys

So are you saying there is no manufactured Rover 4.9??

Thanks

Bruce

Yep. Rover stopped at 4.6, others didn't.

Interesting.

"others didn't"?

Could you clarify that a bit please

Bruce

I think TVR made a 5.0L and Wildcat produced a 6.0L.

http://www.roverv8engine.co.uk/index2.htm

Ok, thanks.

Looks like I am buying a 4.6 and will rebuild it. Probably stroking it as well.


More on this after I buy it.


Thanks

Bruce

Plus Rimmer Bros. & RPI. All based on a bored & stroked Rover.

The Aussies had a 4.9 Rover didn't they? Used it in trucks? Check out the 340 upgrade thread for details and photos on the cam clearance issues, 300 heads, pistons, rods, oiling mods, etc. TA may produce heads for it in a year or two. It's possible to build a really a fine engine.

Jim

http://en.wikipedia.org/wiki/Rover_V8_engine

Here's a history of the Rover V8 including all the variations.

Thanks Simon for  the Rover history.

I am off to take a look at the 4.6 tomorrow and find out how much he wants.

Know anyone who wants a 3.5??


Bruce

No problem, Bruce.  I've looked at that link a few times to clear up how many Rover variations there are.  Good luck with the 4.6. That'd make for a great conversion.

Cheers
Simon