MicroSquirt.com read only forum (Jan.15,2018)

hi every one i am using megasquirt 1,megatune version 2.2 and v2.2 main board....i am running a fiat 2liter engine...i have a turbo on it but i cant map the thing.,..even worse...i dont have an o2 sensor of any sort...
anyone got a map i can use as a refernce.i want to run 15 psi and a max rpm of 6000 any help is appreciated..

dude......

as much as I dont want to discourage you.... without any o2 feedback on turbo engine you are running a great risk of blowing it very fast. I'm telling you.. it is NOT worth it trying to tune without o2 at all. n/a motor possibly, but definitely not a turbo...

as a last resort (i dont recommend it) i'd suggest you get cheap junkyard o2 sensor and tune low rpm/map areas with it and guesstimate (make it very rich... so rich that it smokes black out the back at high loads) high load areas... but it's very bad way of tuning it.

cheapest recommended option - get LC-1 wb02. you can tune whole range with it and it's cheaper then one dyno-tune session and you can sell it afterwards. And you are not risking the whole engine...

alternative is to just go and dyno tune it using proffesional equipment. once correctly tuned you dont *need* o2 sensor at all, but depending on where you are that might be more expensive that LC-1.

whats lc 1 ?

fiat132 wrote:whats lc 1 ?

lc-1 is the cheapest (yet very good) wideband oxygen sensor controller. you can get them for US$199+S&H including the sensor from http://www.diyautotune.com