Brian Curreen 2 Report post Posted April 29, 2019 I want to get an engine built in the usa. Q: how do I describe 95 or 98 octane to the engine builder? We use RON ratings while they use (RON+MON)/2 to work out AKL ratings. So, if I want to run my engine on NZ 95 octane what is the equivalent in usa. 1 Quote Share this post Link to post Share on other sites
Mark_Fleming 80 Report post Posted April 29, 2019 http://www.pencilgeek.org/2009/05/octane-rating-conversions.html 1 1 Quote Share this post Link to post Share on other sites
ajg193 7,383 Report post Posted April 29, 2019 95 is pretty much their 91 1 1 Quote Share this post Link to post Share on other sites
Ghostchips 5,063 Report post Posted April 29, 2019 Their 86 is our 91. 1 Quote Share this post Link to post Share on other sites
SOHC 8,299 Report post Posted April 29, 2019 When you get your engine built get them to make it a side valve, they love low octane. 4 1 Quote Share this post Link to post Share on other sites
Bling 17,574 Report post Posted April 29, 2019 Are they tuning it too? Like on an engine dyno or something fancy. Quote Share this post Link to post Share on other sites
Brian Curreen 2 Report post Posted April 29, 2019 Hey Bing yeah their doing the break in and dyno I'm doing as close to 500hp as possible on pump gas. The tolerances will be tight. Probably holly fI tech throttle body on single plane man. 1 Quote Share this post Link to post Share on other sites
