PI Swap and MPG

Cruizin GT · Oct 15, 2009

For all those that have done the PI swap, have you noticed any better or worse mpg? Have you been able to keep your foot out of it long enough to know??? LOL. I`m still on the fence on whether or not I wanna do the full swap, or just intake and cams.

DropTopPony · Oct 15, 2009

I keep track of my mpg on every tank and for the first few months i was romping the gas every traffic light etc so mpg went down but after i got used to it i got back to where i was prior avg @ 21-23 mpg.

When i went to ported heads/cams etc it went down to 18mpg which isn't bad but i think i could do better if i tried which i don't.

duff daddy · Oct 15, 2009

i see about 20-21 mpg's

Cruizin GT · Oct 15, 2009

So it really has no effect on mpg, if your driving normally. That`s good to know, might make my choice easier. Thanks guys

duff daddy · Oct 15, 2009

and i went from 273 to 373 and now on my way to 410's

Willis_98GT · Oct 15, 2009

Duff Daddy said:
i see about 20-21 mpg's

about what i get

cept i use 3.90

good gear for the city

justinschmidt1 · Oct 15, 2009

I avg about 20...I hit 26-27 on the highway before though

vermilion · Oct 15, 2009

i have npi and get 25-26. but its real slow. oh well give it time.

Cruizin GT · Oct 16, 2009

Sounds good, I think I`m gonna save up and do the full swap. I`ve got 3:27 in the rear, still stock.

lordgufi · Oct 16, 2009

i just finished my first tank on the pi swap with cams. 278 miles to the tank. ( i'm not bone dry yet but ive only got 1/8th of a tank left on the guage ) meaning i could probably go another 40-50 miles.

stanger · Oct 16, 2009

Wow I haven't done the swap yet and I barely get 250 miles per tank! Damnit man!

DropTopPony · Oct 16, 2009

stanger said:
Wow I haven't done the swap yet and I barely get 250 miles per tank! Damnit man!

Maybe you need a tune up and clean/replace filter, O2's etc etc and try different oil. I read in the maintenance section that changing oil grade can add mpg. Next oil change i'm trying the 0W30 to see if it ups my mpg at all. Some say it can add up to 4mpg so we'll see.