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19bonestock88 · 04-02-2021, 08:08 PM

The stock valve springs are the limiting factor for revving high, all stock Ecotec valve springs are good to 7200 RPM. They sell stiffer ones but I wanna avoid getting them in an effort to avoid excessive friction. I guess I could do titanium valves and keepers/retainers to save weight and maybe gain some revs on stock springs but that’s awfully spendy for an under 200whp engine

04-02-2021, 08:08 PM	#29 (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 stock valve springs are the limiting factor for revving high, all stock Ecotec valve springs are good to 7200 RPM. They sell stiffer ones but I wanna avoid getting them in an effort to avoid excessive friction. I guess I could do titanium valves and keepers/retainers to save weight and maybe gain some revs on stock springs but that’s awfully spendy for an under 200whp engine __________________ My current Ecotec project... My last Ecotec project...