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19bonestock88 · 10-09-2018, 04:18 AM

The thing is, I don’t have a V8, nor do I have easy access to E85... I figured that my engine makes 140bhp/150lb/ft stock and a few extra wouldn’t hurt...

I considered dabbling in Miller cycle since I have the blower that’s compatible with my engine, but without standalone engine management to tune it with I’m kinda limited on what I can do...

Was honestly hoping that I could maybe get away with 87octane in winter and 89 in summer... my logic is that the different Ecotec engines use different compression ratios but they all run on regular unleaded... for example, my L61(2.2L) runs 9.5 to 1 but the LE5(2.4L) runs 10.5 to 1... the only major difference is VVT but GM made no claims of simulated Atkinson cycle to offset the compression... leads me to think a higher compression L61 might live on regular

10-09-2018, 04:18 AM	#115 (permalink)
19bonestock88 Master EcoModder Join Date: Jun 2016 Location: KY Posts: 1,352 IGL - '04 Saturn Ion Team Saturn 90 day: 56.19 mpg (US) Thanks: 63 Thanked 366 Times in 269 Posts	The thing is, I don’t have a V8, nor do I have easy access to E85... I figured that my engine makes 140bhp/150lb/ft stock and a few extra wouldn’t hurt... I considered dabbling in Miller cycle since I have the blower that’s compatible with my engine, but without standalone engine management to tune it with I’m kinda limited on what I can do... Was honestly hoping that I could maybe get away with 87octane in winter and 89 in summer... my logic is that the different Ecotec engines use different compression ratios but they all run on regular unleaded... for example, my L61(2.2L) runs 9.5 to 1 but the LE5(2.4L) runs 10.5 to 1... the only major difference is VVT but GM made no claims of simulated Atkinson cycle to offset the compression... leads me to think a higher compression L61 might live on regular __________________ My current Ecotec project... My last Ecotec project...