I want to do a swap on my 1990 325i and want your guys' opinion on which engine to go with. I'm trying to get 400 horse NA. So which engine would be best? And what other mods should I do to get my 400 horses other than adding a carbon airbox?
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Swap: S38 or S50B32
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Originally posted by eastcountybmw View Postwhy not the s38?
If you've got the ducats sitting around, look for a s50b30 euro. It's a completely different engine from the US s50. Keep in mind that none of the three have a hope in hell of getting 400 HP N/A.
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Korman or MM built engines don't make it to 400 on an NA S38. Thats with like 15 grand worth of work after you find the motor. You can probably do it, run that race fuel they sell at that gas station of the 8 in El Cajon but I don't know how long you will be able to run it before it's going to need a rebuild, and you don't like maintenace.
Maybe you can build up an M88, that would be cool and you will get you spend a lot money.sigpic
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