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[Ecotec] 10.1:1 pistons requires 98 RON?

Discussion in 'V6 Development And Modification' started by Taranaki, Nov 6, 2018.

  1. Taranaki

    Taranaki Member

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    I got a low-mileage Ecotec from a VY. Was thinking about increasing compression ratio.
    Would 10.1 get by on 95 RON, or would 98 be needed?
    That is assuming no tweaking the engine map to reduce spark advance....
     
  2. delcowizzid

    delcowizzid on holiday

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    Team it up with a large enough cam and a a tune you might get away with 95.a custom intake without such long skinney runners to stop the huge ram effect at certain rpm ranges would probably help too.speedway guys here use the l67 manifold for n/a it flows far better than the ecotec one
     
  3. _R_J_K_

    _R_J_K_ Well-Known Member

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    Are you doing anything else?
     
  4. Taranaki

    Taranaki Member

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    Maybe, I will do one thing at a time. Probably air intake and exhaust as well. I don't know about high-ratio rockers; whether they might clash with high-compression pistons.
     
  5. _R_J_K_

    _R_J_K_ Well-Known Member

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    If that's all you're doing don't bother with compression, this isn't the days of carby engines. Not to mention, changing the compression (and going to all the effort of stripping the engine down to do so) without actually remapping is doing half the job as you're not really reaching the engines potential and it will likely retard anyway.
     
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  6. losh1971

    losh1971 Well-Known Member

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    If you go CAI, go Mace they are the best. It's on my list, was hoping later this year but it might be Jan 2019 now. Unfortunately wife and the girls want Christmas presents as does the grand daughter...:(
     

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