alright my apologies i thought it was said the d16 pistons would work in the 1.6. as far as raising the compression, thats what i was i i was going to do for the exact reason mention of it would increase power through the band not targetin low or or high rpm power. but i do believe a rebuild with the few bolt on perfance parts will do for now. cause i have found a new venture i may like to take one day after i reasearch the snot out of it and really try to make it work. everybody is right with the 4.3 kinda takes away from the lightweight small vehicle approach. iid like to really buckle down and try to figure how to do an ecotec swap, ive been reading up as much as i can bout it, it may not be somthing i do for alittle while but i want to for sure try it when i am able. its engine that makes good power and has a killer aftermarket. but for now ill just make the stock motor right again and give it the minor tweaks of a cam and header. thanks you guys for the help, and ill let you guys know for sure if i go for tryin to drop and ecotec in.

well I dont know what you plan on using the tracker for but I will give what I did to mine. I use mine for playing in the mud and stuff like that. I have rebuilt my motor only thing non stock is the .030 over on the pistons. I run 31" super swamper ltb's they are very aggressive. I had to rebuild the tcase with the 4.25:1 reduction kit so it would turn the tires. before i put the ltb's on there i had no prob turning the mud terrain tires 31" also. these motors put out good power for what I do with it. so I think you would be fine with just rebuilding the motor and going .030 over on the pistons and then the torq cam from lowrangeoffroad. but thats my opinion. hope you figure out what you are going to do and find all the parts to do it. enjoy the tracker they are a blast. I love to watch people's reaction when I pull up to a full size truck stuck in the mud and I pull them out with my tracker. Its funny.

my goal for now is to turn be able to turn 31s. i want use it for runnin trails, muddin and street drivin. as far as people not realizing how capable they can be, thats what i love the most about this thing. last time we went out wheelin. there were 2 lifted toyotas 1 with a 4.3 swap, other with a 22re solid axles and locked, a k10 with 36 inch swampers, and a stockish 98ish chevy 2500. well we got tto where we wheel and apparently the guy runnin roundd on 46s on his super duty rutted the one mud trail up real bad. every  body oh i dont know i aint goin through there and this and that, im like well screw it  ill try, mind you stock with street tires, went for it made it through till i got high centered but everyone was like what the hell, how?  the 2500 was next, forget it sunk bad got him out with the k10, kid in k10 would even try, afraid of breakin his pretty little rot box, and the 2 kids in the toyotas were the only ones who made it all the way through it all, but i feel i could have made with some lift, some tires, maybe locked rear, and some more power. yotas were runnin bald 33 inch boggers and 33 inch m/t mtx radials that werent worth a damn

A lot of yotas / suzukis will make it through badly rutted pits 'cause they have narrower wheel bases.

yeah my tracker goes thru a lot of stuff with the rear locked then i have homemade lift on it. i was going thru a lot yesterday and everyone there was in shock

A lot of yotas / suzukis will make it through badly rutted pits 'cause they have narrower wheel bases.

   Narrower wheel bases 

Wheel base is the, so to speak, "front to back" distance the wheel centers, track is the "left to right" equivalent.

Do you mean shorter wheelbase or narrower track?  Or both?

well thesee yotas sit pretty wide and long, considering one is an ifs rig with wide wheels and tires and is an extended cab, the other is straight axle 4 runner with wide rubber and wheels also, they dwarf the size of the tracker.