SWAP e30 with S52B32 many questions for a race engine rebuild

[Marc124444]

It will be complete rebuild :

ALREADY IN STOCK
e34 oil pan with Achille motorsport baffle
Knife edge balanced crank shaft
ACL Race crank and rod bearing
PAUTER forged rod
Sunbelt race cam
euro oïl filter housing
Solid lifters kit
Stewart waterpump
Bimmerworld silicone boot 3.5
S50 intake
Cometic head gasket
Header Supersprint eBay copy
Power steering delete


??? QUESTIONS -What is the best $$$ for HP???
STOCK 10,5:1 compression pistons or 11:1?

HD spring with the use of the Sunbelt race cam?

Bigger valves?

Port match?

30lbs injectors?

Engine management : Megasquirt ?

[TobyB]

1: 11:1

2: What will be your rev limit? Ask Sunbelt.

3: Ask Sunbelt.

4: usually

5: if needed

6: Sure. Real racing ecus are expensive, ms has proven to work.

t

[pazi88]

Stock Ms41.2 for s52 is nowadays fully adjustable with almost zero investment. Look for ms41 tuning at RomRaider forum.

[ncsubowen]

If you reach out to OMG Motorsports they have a set of high comp pistons really cheap that got abandoned from a customer build without being installed (open box essentially).

Denis Oreshkin on the R3V facebook group. He's got a lot of info on S52 builds as well and is really easy to work with and happy to answer questions.