Quote:
Originally Posted by oil pan 4
I saw a 2 to 2.5mpg improvement when I installed a turbocharger.
I put the turbocharger on my engine and changed nothing else beyond the intake and exhaust plumbing. I was also running hot boost.
Read the MPG improvement wiki, I put all my links about studies about turbo chargers increasing fuel mileage in there.
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Believe me, as a semi retired diesel mechanic and big rig driver I have heard similar experiences to yours a lot. I wonder if with the auto trans, the turbo gives it just a bit more pep to keep the torque converter locked up a bit more, you see how even just changing one variable like you did, could have allowed something else to increase the mpg. You did do the intake and exhaust at the same time too, making it even more complex.
What is your take on the EPA data showing a vw 1.6 na diesel getting 9% better mpg than the turbo 1.6? Both 23:1 compression mechanical diesels like ours. Drives me bonkers. Just want to be scientific about my mods, since I am too broke to try everything Edison style, and there is this contradictory data.
As far as progress today, clutch and brake pedals are hung, brake booster removed, so now my clutch mc will fit. I will be changing the factory pedal ratio from 3.18:1 to 5.5:1 to counteract the loss of power assist. Since this is the only thing run by my belt driven vacuum pump other than a vacuum pressure gauge, I will be pulling that as well. It only adds 1/2" to the belt removing the vacuum pump so hopefully the tensioner can take up the slack.