i have the option of acomplete maxima n47 head for just 35dlls, 3:9 from a ZX and a 4:11 fromk a 200sxt for 50 and 70 dlls... which combo is the best for a street daily driven car and ocasional honda eater???? i do a search and i don"t want to change a thing in the head...like the valves or stock cam...

which would be the effect in the performance of the car like; launch, power gain, top speed, rpm in the gears, gas consumption and running temperature?????

If you don't want to change anything in the head the MN47 isn't going to be the way to go. It's a good head, but needs work to make it really fun.

The 3.9 and 4:11 rears are going to increase your jump off the line, but decrease your top end and gas mileage as you'll be turning more RPMs than with you stock rear. You will feel the difference with the 4:11 though. It will be a launch you can truly feel. So long as you keep your cooling system clean and working properly you shouldn't have any worry about temperature.