OK, so I've been doing a fair bit of research recently looking into stroker builds.
I currently have an M52B25 with a blown head gasket. So thats the engine being built.
From what I have read the most common stroker builds are:
1) M54 crank, m52 rods, m52 pistons. This yields a M50b30 clone, so 3L and 10.2 CR
2) S50 crank, m52 rods, m52 pistons. This yields a 2.9L High compression (a little less detail on this one, so I may be wrong)
3) S50 crank, s50 rods, s50 pistons. This would mean having the block bored, but would yield more or less an s50b30 replica?
4) M54/S52 crank, s50 rods, s50 pistons. Im guessing this would yield an S52 replica?
Now, a few queries:
Could I use the M54 crank and Pistons with my M52B25 rods (which i believe are 140mm). This would put me 3.12mm above deck (assuming block height is 210mm, can someone confirm?). This could be easily dealt with by using a thicket head gasket. VAC sells one up to 3.5mm. I can also have the pistons shaved. I live in Australia so 98 octane fuel isn't an issue, hence would be happy to run up to about 11.3-11.5 CR. So can someone please tell me what the combustion chamber volume of the M52 head is? so I can accurately work out my compression ratio.
Or if someone wants to do the maths, figure out how thick a head gasket I need/how much I need to have taken off the piston?
Furthermore I plan on using an M5430 intake cam, and an M50B20 intake cam on the exhaust side. (or maybe both M50B30 cams) will my valves still clear the cylinder at TDC? I'd use M3 cams but here in Australia they aren relatively hard to come by.
Please raise any issues you see with this plan. Any comment is more than welcome.
Thanks heaps.
P.S. If this build comes into fruition, I will be writing a complete thread, including retrofit of euro ITB's, euro headers, under driven pulleys, fan delete and hopefully a few more tricks ;)
I currently have an M52B25 with a blown head gasket. So thats the engine being built.
From what I have read the most common stroker builds are:
1) M54 crank, m52 rods, m52 pistons. This yields a M50b30 clone, so 3L and 10.2 CR
2) S50 crank, m52 rods, m52 pistons. This yields a 2.9L High compression (a little less detail on this one, so I may be wrong)
3) S50 crank, s50 rods, s50 pistons. This would mean having the block bored, but would yield more or less an s50b30 replica?
4) M54/S52 crank, s50 rods, s50 pistons. Im guessing this would yield an S52 replica?
Now, a few queries:
Could I use the M54 crank and Pistons with my M52B25 rods (which i believe are 140mm). This would put me 3.12mm above deck (assuming block height is 210mm, can someone confirm?). This could be easily dealt with by using a thicket head gasket. VAC sells one up to 3.5mm. I can also have the pistons shaved. I live in Australia so 98 octane fuel isn't an issue, hence would be happy to run up to about 11.3-11.5 CR. So can someone please tell me what the combustion chamber volume of the M52 head is? so I can accurately work out my compression ratio.
Or if someone wants to do the maths, figure out how thick a head gasket I need/how much I need to have taken off the piston?
Furthermore I plan on using an M5430 intake cam, and an M50B20 intake cam on the exhaust side. (or maybe both M50B30 cams) will my valves still clear the cylinder at TDC? I'd use M3 cams but here in Australia they aren relatively hard to come by.
Please raise any issues you see with this plan. Any comment is more than welcome.
Thanks heaps.
P.S. If this build comes into fruition, I will be writing a complete thread, including retrofit of euro ITB's, euro headers, under driven pulleys, fan delete and hopefully a few more tricks ;)
M52 Stroker questions.
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