fuel economy swap idea
Today I was loading up a couple years worth of extra engine blocks and transmissions to tale in for scrap when I got curious. I have my original SPI block and a 97 2.3 ranger engine lying on the garage floor and decided to try it out just foe the hell of it. Well it turns ot that 5 of the 7 bolts line up. Now I'm thinking even more.
My 01 focus se sedan with automatic and completely rebuilt spi engine gets an average of 28 mpg when driving it easy. I also have a 2 wheel drive 97 ranger with the 8 plug 2.3 engine, 4.10 limited slip rear and shorter geared mazda transmission. This truck hits the rev limiter at about 95-97 mph due to the not so highway friendly gearing combination but still gets a consistant 25 mpg and I beat the hell out of it like it owes me money.
I'm not sure exactly why ford put 8 spark plugs in this engine but I have heard emissions and I've heard better torque output but either way, I think my truck does an amazing job at getting very good mileage with how hard I run it and the gearing working against conserving fuel mileage. My thought here is that I think since the 2.3 I pkug ranger engine will bolt up to the focus trans, it would make better usable power and get better mileage than the spi engine. I would like to hear everyone else's thoughts on this so everyone please discuss.