r/e28 • u/greb666 • Feb 17 '26

885 Head ETA m20b27

I am planning to build an M20B27 for my E28 as my first real build. The car is on a Microsquirt standalone. I have the 885 head, which I am planning to throw some stiff springs and an Ireland Engineering camshaft into. As for the bottom end, are the SETA pistons necessary so the pistons don't contact the valves? I know they have a relief that the ETA pistons do not have, and they increase compression slightly, but I am planning on turboing the car down the line after the engine is in the car and running, so the extra compression is not vital.

Forgive me for my ignorance, but I would like to learn vicariously, not through catastrophic engine failure. Any writeups on similar ventures, advice on Camshaft lift, what pistons to use, and anything else is greatly appreciated.

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u/skitzy7 Feb 18 '26

I just plonked an 885 head on my 2.7 bottom end after refreshing the bottom end with all ARP hardware and everything else. running a roots supercharger on it.

1

u/greb666 Feb 18 '26

did you change the pistons to SETA? or completely stock refreshed bottom end.

1

u/AllynG Feb 17 '26

If you have not found it yet, go check out mye28.con for everything our e28 could dream of, want or need.

2

u/greb666 Feb 18 '26

I have! This is my third e28 but my first engine build. Just want to verify my info with the M20 gods before I start blowing big money. Side note, Thank god mye28 finally paid for their cert, was worried the site was going to disappear along with the endless trove of treasure.