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e30ftw

M54B30 internals

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Hmmm what you up to, John?

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I sold some awhile back. Think I got 300 bucks for them

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Think Ray has some last time I spoke to him.

Cool motor to build. Mines nearly done, have pocketed the Pistons to run some gruntier cams so put a bit of a holt on it all.

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Yeah I checked with Ray, He never got back to me. Will check again.

Did you build them into an m52 or m50? I'm thinking M52 for the Alloy block + I can use my S52 cams.

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Depends what you want to do.. Boost or na? If you were going na I would be looking at alloy block or just getting a m54 to start with.

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Yeah just N/A. Rather stick to the Alloy M52 block instead of changing a whole heap including ECU to move to an M54.

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M54B30 long block $1200

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Yeah just N/A. Rather stick to the Alloy M52 block instead of changing a whole heap including ECU to move to an M54.

Yeah it's a bit of extra work for sure. There was one for sale earlier, complete with ecu for $1700. Prob would of been worth it.

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My ones a mongrel one, alloy block and no vanos.

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Mines alloy block, no vanos and lots of M50 bits and pieces. Must work tho, keep smashing Getrag boxes, too much torque. Now has a ZF M3 box.

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Just a note on this and it may be case by case I don't know. I just had the bottom end assembled using m54 crank,rods and Pistons, the Pistons sit about 4mm too low in the bore. So thinking I'm going to have to use a longer rod, presumably out of an early m50 non vanos. I have these so I'll give them a go and report back.

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Oh really, weird haven't heard of that before. Where do the pistons sit at TDC compared to the top deck, wouldn't longer rods push them too high over?

I've found a set now too, rods crank and pistons.

Edited by e30ftw

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Just a note on this and it may be case by case I don't know. I just had the bottom end assembled using m54 crank,rods and Pistons, the Pistons sit about 4mm too low in the bore. So thinking I'm going to have to use a longer rod, presumably out of an early m50 non vanos. I have these so I'll give them a go and report back.

I have a bit of paper somewhere as I had all the m54 stuff, different m52 and m50 vanos/non vanos and I had measured all the rods and pistons and worked out the different combinations.

I'll try find it.

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Just a note on this and it may be case by case I don't know. I just had the bottom end assembled using m54 crank,rods and Pistons, the Pistons sit about 4mm too low in the bore. So thinking I'm going to have to use a longer rod, presumably out of an early m50 non vanos. I have these so I'll give them a go and report back.

You may be able to use M40 rods - I understand they are 138mm?

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If anyone needs any, I have a set of mint m54b30 Pistons that have been pocketed to run big high lift cams. Been cleaned and ring grooves recut.

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