Super User Way2slow Posted October 16, 2011 Super User Posted October 16, 2011 I'm fixing up my old 93 Toyota 4WD Pickup, with the four cylinder 22RE engine for my 15 year old granddaughter. I recently rebuilt the engine where my son had run it hot and pretty much fried it a couple of years ago. Picked up another engine for the block so I had basically two engines. I decided to do a lot of port work since I had a spare head, intake and exhaust manifold if things didn't go as planed. I port matched all matteing surfaces in the whole intake and exhaust track, cleaned and deburred the whole system with 80 grit on the intake and 400 grit on the exhaust. I also did a lot of work in the valve pockets, smoothing out sharp edges and cleaning up the flow there. All cleanup work was to increase velocity, I did nothing to make any ports or passages larger. I did a three angle valve job on valves and seats. Did a lot of cleanup in the exhaust manifold also. The truck did have noticably more power/torque, even my granddauther has commented on how much more power it has when she's driving. The motor rolled 1,000 miles today on the way to the farm. On the way I filled it up with gas so I could check the gas milage for the first time and see how all my port work affected the milage. On the way back, I filled it up again and with all the running around I had to do, I drove 164 miles and that was staying on it, in town, in the woods and highway, no babying it for max milage, and thinking as long as it got at least 20 I would be happy. Both times I filled it at the same pump, facing the same direction until gas was running out both times, and it took 5.24 gallons. That's over 31 mpg for a 4WD pickup. That's totally unreal, the truck only got 22 - 24 mpg when it was new. I think my port work turned out better than I ever expected. Next test is on the interstate at 75 - 78 mph and see what it does then. That was two lane roads at 65 along with some stop and go city driving. That's also with the original injectors and oxygen sensors. By the way, I'm no stranger to porting either and have a very good flow bench, I did my first set of heads in 1964 and I've been doing my own porting for all my race and street engines and boat motors ever since, so I at least knew a little about what I was doing. I'm just flabergasted the results turned out as good as it did. Over 31 mpg from a 93 4WD Toyota pickup, that still blows my mind. Hell, if I had thought it would have made that much difference, I would have pulled it off when it was new and done it then. Quote
Super User Sam Posted October 16, 2011 Super User Posted October 16, 2011 Outstanding! Congrats. Hope the gas mileage holds up for your grandaughter. Quote
Triton21 Posted October 16, 2011 Posted October 16, 2011 When can I bring my 04 Tundra V8? Glad your work will save Granddaughter gas money. Kelley Quote
tipptruck1 Posted October 16, 2011 Posted October 16, 2011 After seeing this I might have to go get my engine ported now. I might be able to hit the 40mpg plus. I get about 30-35 mpg if I stay off the boost. Plus as munch as I go to the track it would be worth it. It dose make sense since you are letting the motor breath easier. You are also getting the air to flow smoother getting in and getting out. You know as well as I do. Engines like the air to be as smooth as possible. Quote
Sfritr Posted October 17, 2011 Posted October 17, 2011 That is almost as good as my beater car. I bought a 97 Jetta to drive back and forth to work and it gets 35mpg. I would much rather be driving a 4wd truck. Wanna Sell it? LOL Nice work... Quote
OHIO Posted October 17, 2011 Posted October 17, 2011 That's impressive. I need to get better mileage with my truck. It gets about 15 now. Quote
Super User Way2slow Posted October 17, 2011 Author Super User Posted October 17, 2011 Oh how well I know the fuel bite. My 4WD 350,chevy pickup gets about 15 - 16 without the boat behind it. It's hard to wanna tear a perfectly good engine down but with today's fuel prices, I'm getting tired of feeding the thing, it stays parked weeks the time. That's why I went to the farm in the Toyota. I've been giving serious consideration to changing cams, reworking the whole top of the engine and installing a better exhaust system. It's just all that usually cost more than the gain in milage you get. Yea, it greatly increases performance, but so far, I haven't found the trick to making those 19th centry technology engines the US insist on using, to getting great gas milage. At least they are finally starting to wake up and smell the roses, after going broke trying to push that crap down our throats while the rest of the world was making modern, high tech engines capable of giving good milage. Quote
Super User clayton86 Posted October 19, 2011 Super User Posted October 19, 2011 That's awesome I did something similar when I rebuilt my old yota tercel 1.5 5spd I bumped it to 49mpg it was a beast to I'd think it was 4wd lol Quote
North Ga Hillbilly Posted October 19, 2011 Posted October 19, 2011 I felt pretty snazzy when my truck had a vacuum operated valve come unstuck jumping my mileage from 10 to 15... about as good as I can expect from a 85 F-150 with a 302. Congrats on the truck! NGaHB Quote
bwell Posted October 19, 2011 Posted October 19, 2011 Can you do the same thing to my 2002 Ram that gets 10-12 mpg? lol Quote
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