rovr v8 - 4.6 crank into a 3.5 block

[bertieboo]

Is it possible and is it worthwhile?

[Boosted LS1]

The only benefit is the increased stroke but you'll have to grind the mains down .200" or line bore the block up .200". You may also have clearence issues. If the crank's free then it may be worth trying. Do you want a long stroke small bore engine or have you a 94mm casing?

[v8ian]

toyed with somthing similar a while ago, I do like a revvy engine, destroke the 4.0 crank with a 94mm block, dosent matter if its a X bolted block or 3.9 block, put the right bits in the engine and I dont see a problem with 8k rev limit, I would think a x bolt would help with the dreaded cap walk, I wonder what it would perform like??

[Steve_D]

Too much work......stick a Chevy in there.

Steve

[350Matt]

Getting enough air in there for 8k would be the trick....

Nice idea tho it would sound pretty special at those rev's

[GreenV8S]

v8ian said:

I wonder what it would perform like??

Not as well as a plain old 4.6 crank in a 4.6 block, I suspect.

[xyphod]

I think the Austrailians made such an engine for a holden many many years ago.

If I remember rightly (havn't got my old rover tuning manual to hand) they also found some lotus 4V heads with overheads cams that happened to fit perfectly on the old rover block.

It was a rather tall engine though

[Boosted LS1]

You can fit buick cranks to, occasionally you'll come a cross one cast from steel.

[Simon Says]

350Matt said:

Getting enough air in there for 8k would be the trick....

Nice idea tho it would sound pretty special at those rev's

This one did http://www.youtube.com/watch?v=zDI3UxLxoTg its about 10% in to this video(red oxide MK1 Cortina)i think the motor only went to 4.6 development and revved to 8k+ if memory serves(sounds like it too) TRW sponsored later on.

Edited by Simon Says on Wednesday 11th November 10:17