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really low compression

Discussion in 'Engine Building' started by Bobby17772, Apr 17, 2010.

  1. Bobby17772

    Bobby17772 New Member

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    I'm building an engine for high boost...well I think it's high for a single cam between 15 and 20 psi. And I was wondering how low is to low? I plan on using vitara pistons and eagle rods which would give me about ~7.5:1 compression. If I was to run it like that with tuning would I have to advance the hell out of the timing or regardless of tuning would it be unstreetable? Because I could get custom rods but I just didn't know how bad it would be if I left it at that low of a compression
     
  2. Magana559

    Magana559 The Warden

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    Thats pretty damn low, I would use something with 9:1. Would take a lot less boost to make the power you want. Less boost = less cylinder pressure= low chances of detonation.
     
  3. Bobby17772

    Bobby17772 New Member

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    yeah I found rod/piston kit thing that would yeild 8.4:1 which is still less but I think it would be better you know?
     
  4. ricksautomotive

    ricksautomotive honda dealer tech

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    boosted engines like you want to build require alot of maintenance and generate alot of heat. streetability? not so much but doable. go like 9:1
     
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