Guest Anonymous Posted November 22, 2002 Share Posted November 22, 2002 My 240 came with an extra engine. Its a l28 fi says N42 on side i heard someone saying something about the F54? is there major differnces and can i use this block to build a turbo engine ? Quote Link to comment Share on other sites More sharing options...
johnc Posted November 22, 2002 Share Posted November 22, 2002 The major difference is siamesed clyinders in the F54. Yes, you can build a good turbo using the N42 block. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted November 22, 2002 Share Posted November 22, 2002 What would have been the advantage of the F54 over N42 ? is it worth looking for a F54 ? I am building this engine to run high 10's. Quote Link to comment Share on other sites More sharing options...
johnc Posted November 22, 2002 Share Posted November 22, 2002 The F54 is arguably a stronger block. In more extreme turbo applications it was found that the non-siamesed cylinders of the N42 tended to go out of round and lose some of the ring seal. These extreme applications were the Electromotive competition 280ZXs build by John Knepp and driven by Don Devendorf, Paul Newman, etc. If you want to run 10's you'll need at least 400hp. Its probably a toss-up whether to use the N42 or the F54 at that horsepower level. If you go above it then I would recommend the F54. Quote Link to comment Share on other sites More sharing options...
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