Quote:
Originally Posted by pokeybritches
1000 hp to 1000 hp. The S54 block can't reliably handle those power levels without additional prep work. Sure there are running examples that have done it once on a dyno, but any engine that is raced will have had additional work done. Block availability may have something to do with it, but I think it's about the overall package and cost to get there, including tuning and complexity. The M50 block can take a lot more abuse than the stock S54 block. The S54 was a superior engine when it left the factory, but that doesn't mean it's the most ideal for extreme power levels when budget is factored in.
I'm not suggesting a move to the M50 block in an E46 M3 or Z4M... only that the M50 block has found a following, and in many cases has proven to be a more cost effective option than the S54... particularly if the car didn't come standard with an S54 and a whole engine/harness transplant are needed.
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There's several 1000+ hp S54s runing in Sweden and Norway, but lets agree to disagree.
In Sweden the M54B30 is becoming more popular to turbo, aluminium block with cast iron sleeves. You do have to use helicoils and ARP bolts in the block though.
Back to Arsonism's thread.
