TwinTurbo.NET: Nissan 300ZX forum - Re: the b18c5's compression is not well suited for a turbo.
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Subject Re: the b18c5's compression is not well suited for a turbo.
     
Posted by lazersos on February 18, 2004 at 2:33 AM
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In Reply To the b18c5's compression is not well suited for a turbo. (n/m) posted by TwinTeezy on February 18, 2004 at 12:03 AM
     
Message Actually, your thinking with stock turbocharged logic. Reality is the B18C5 has great compression for turbo as it's already high. The thin rods make it weak for any high HP application but if you look at true race engines that run forced induction setups you'll see that they also run high compression. In fact many of the pro FWD guys are just now realizeing their folley with low compression and high amounts of boost (major lag and wicked torque curves). They're acutally now bumping up compression. Too bad they didn't look at Lemans cars and old-school F1 cars earlier. As for the B18C5 not being able to handle an FI setup this is true for many reasons (but compression isn't one of them):
1) Anemic fuel system
2) Fairly large overlap
3) Cast Aluminum pistons (burn very easily under knock)
4) An engine managment system designed to go into limp mode at 1lb of manifold pressure.
5) Rods that probably won't handle more than 250hp for long.

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