What's the maximum stroke you can use with a Rover V8?
Could a buick 350 crank be used 3.85" stroke (if you turn the journals down) or will the pistons fall out the bottom of the bore?
Jeff
Max stroke
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Hi Mr Wanger
It depends how much work you are prepared to do to fit the crank. . .
you can get around most issues by a bit of engineering, if the pistons end up popping out the bottom of the block then fit longer rods, if they now pop out the top fit a lower pin height piston with a shallower skirt, if you need more make a deck plate for the top of the block and fit longer sleeves through that into the block, if the connecting rods hit the side of the block then grind a bit off the block or rod, again if you mneed more fit a rod with a smaller big end journal diamiter and grind the crank the list goes on. . .
Best regards
Mike
It depends how much work you are prepared to do to fit the crank. . .
you can get around most issues by a bit of engineering, if the pistons end up popping out the bottom of the block then fit longer rods, if they now pop out the top fit a lower pin height piston with a shallower skirt, if you need more make a deck plate for the top of the block and fit longer sleeves through that into the block, if the connecting rods hit the side of the block then grind a bit off the block or rod, again if you mneed more fit a rod with a smaller big end journal diamiter and grind the crank the list goes on. . .
Best regards
Mike
poppet valves rule!
HiWotland wrote:3.7" seems really the max as long you don't opt for Honda rod journal.
If not conrod bolts could hit cam lobes.
How about using a small base circle cam ground for 1.75:1 ratio rockers? as I said how far are you prepared to engineer your way around the issues
Best regards
Mike
poppet valves rule!
Since Fozwanger brought this up (and we had a brief discussion on this) please let me enlighten you on some points.
1. Can a Buick 350 crank be cut down to Rover V8 size on the main bearing saddles?
Yes, it can. The Buick 350 has 3" main bearing journals. They can safely be cut down to 2.5" as has been demonstrated in a Hot Rod article that focus' on dropping that crank into a Buick 300 block which ALSO has 2.5" main bearing journals. That info is here:
http://www.hotrod.com/techarticles/engi ... ewall.html
2. Can the same cut down Buick 350 crank be made to fit into a Rover V8 block?
Again, yes it can. Maybe Fozwanger can post some pics, but, as Wotland has said, way back when I had the bright idea of stroking a P76 block with a Buick 350 crank. Since the P76 has a taller deck than the Rover, it's a much simpler thing to do. Anyway, after marriage and two kids, that project went by the wayside, BUT, I had a notion to slip the cut down 350 crank into a Rover block to check for a fit. It fits well. Turns with no obstructions. With some thought, I'm sure it can be made to work.
3. Can Rover rods work with the Buick 350 crank?
No. They are far too short. However, judging from the info gleaned from the Hot Rod article, 5.96" Buick 300 rods can be made to work. I'm sure Chevy 6.00" rods can also be made to work.
4. What would be the result?
Lot of torque. Personally, if the Rover block could be sleeved out to 3.8", that would be a lot better breathing wise. Can you do that? It would also help to grab a set of the new TA Performance heads. Big valves and big ports. 5.7 liters of mean Rover.
5. Is it really worth it?
On this side of the pond, no. Investing several thousand dollars in machine work and parts will get a motor that is on par with the new Chevy LS1's. Like they say "Speed costs money son, how fast do you want to go?".
But don't let me stop you! I say go for it!
Pics
http://forum.britishv8.org/read.php?6,29211,page=4
Greg
1. Can a Buick 350 crank be cut down to Rover V8 size on the main bearing saddles?
Yes, it can. The Buick 350 has 3" main bearing journals. They can safely be cut down to 2.5" as has been demonstrated in a Hot Rod article that focus' on dropping that crank into a Buick 300 block which ALSO has 2.5" main bearing journals. That info is here:
http://www.hotrod.com/techarticles/engi ... ewall.html
2. Can the same cut down Buick 350 crank be made to fit into a Rover V8 block?
Again, yes it can. Maybe Fozwanger can post some pics, but, as Wotland has said, way back when I had the bright idea of stroking a P76 block with a Buick 350 crank. Since the P76 has a taller deck than the Rover, it's a much simpler thing to do. Anyway, after marriage and two kids, that project went by the wayside, BUT, I had a notion to slip the cut down 350 crank into a Rover block to check for a fit. It fits well. Turns with no obstructions. With some thought, I'm sure it can be made to work.
3. Can Rover rods work with the Buick 350 crank?
No. They are far too short. However, judging from the info gleaned from the Hot Rod article, 5.96" Buick 300 rods can be made to work. I'm sure Chevy 6.00" rods can also be made to work.
4. What would be the result?
Lot of torque. Personally, if the Rover block could be sleeved out to 3.8", that would be a lot better breathing wise. Can you do that? It would also help to grab a set of the new TA Performance heads. Big valves and big ports. 5.7 liters of mean Rover.
5. Is it really worth it?
On this side of the pond, no. Investing several thousand dollars in machine work and parts will get a motor that is on par with the new Chevy LS1's. Like they say "Speed costs money son, how fast do you want to go?".
But don't let me stop you! I say go for it!
Pics
http://forum.britishv8.org/read.php?6,29211,page=4
Greg
