skimming a m44 bock

[bmw2101]

i have am m44 that i am going to build for my rally car, i wanted a m47 crank for it but them seem to be hard to get.

so option 2 is just to skim the block and get the compression up, but i was told by a guy who builds engines taht it would create headaches due to teh ciming chain covers...

is that true?

i want about 11.5:1

i also have s52 3000cc pistons for it.

Is there any other pistons i could use that are taller? I have heard of vauxhall ones, but i havnt a clue which.

Also, reving to 7,000 do you need arp bolts?

is there any other tuning tips you could give me please?

thanks

[xxxJohnBoyxxx]

Do not deck the block the timing chain bolts won't fit on the head bolt pattern. You can mill a little off the heads and get your compression that way. 7,000 on stock rob bolts is what I ran boosted @ 15psi but if you are going to be slinging bigger pistons then I would suggest the upgraded bolts.

Originally Posted by bmw2101

i have am m44 that i am going to build for my rally car, i wanted a m47 crank for it but them seem to be hard to get.

so option 2 is just to skim the block and get the compression up, but i was told by a guy who builds engines taht it would create headaches due to teh ciming chain covers...

is that true?

i want about 11.5:1

i also have s52 3000cc pistons for it.

Is there any other pistons i could use that are taller? I have heard of vauxhall ones, but i havnt a clue which.

Also, reving to 7,000 do you need arp bolts?

is there any other tuning tips you could give me please?

thanks

[bmw2101]

ok thanks mate, i see i cant really do that now!