Quote:
Originally Posted by NachtRitter
Same with mine... cleaning the intake made no difference in FE. What made a huge difference for me is getting updated nozzles / injectors. Could be because the old nozzles were not flowing as well, but putting new larger nozzles improved my freeway FE from ~28MPG to ~48MPG... huge difference!
I'm sure it wouldn't have made anywhere near as much difference if my current nozzles didn't have ~300K miles on them.  |
I think, it dependend on how clogged is your intake, egr and intercooler, it's very noticeable in performance when you clean all the intake in some cars(i'm talking only about diesel vw's).
About the 15", they are very light, the tires are thin, and i have a very long gearbox, with 17" i cant run at very low rpm's because the engine starts to choke(i dont know the corret word in english), with 15" i can run at 6gear, 1500rpm's and if i smash teh pedal the car goes to the front, no clutch vibration, no engine choking, feels very free and light, i can spin my wheels even in third gear if i full throttle
it's very noticeable the difference 17" vs 15"(i'm using audi a2 15" wheel).
I believe in car with short gearbox like tdi 110 you wont feel that kind of difference, to get the point, my 5th gear top down at about +/-210km/h(redline) and i still have another gear to run, i can run at 120km/h in 6th at +/-2000rpm's.
When you modify your intake you have to think like your car ecu, your car injects fuel vs maf readings, if you change your intake your maf readings will be different, sometimes you loose performance when you change your intake you have to know what your doing, and in a turbodiesel car, the turbo sucks the air, you dont need a "special racing intake"
I just mod my intake because i have to, i have no choice my car was a drag racing car, when i was using it to race i dont care about smoke, mileage etc, i just need a lot of air to burn a lot of fuel, as a street car, i care about the smoke, i care about the mileage, i'm very happy whit my street econo tune, very, very happy, but i know i can do even better, i have to try more ideas i have collected in this forum, and see if they work in my car, i'm not an engineering, i'm just a mechanic.