Nissan 370Z Forum - View Single Post

MJB · 04-07-2012, 02:48 AM

ECU tuning isn't so much about gaining the HP, but rather adjusting your A/F ratio to safer levels after bolt ons, smoother power delivery, quicker throttle response, increase rev limiter, speed limiter adjusted.. ect...

Usually after bolt ons you are going to run lean. I know my 350z was running dangerously lean at WOT after I had full bolt on installed. Stock ECU mapping can only adjust A/F, timing, ect so much...

IMHO bolt ons are a waste if you do not get a tune. And yes, even the Nismo could use a tune after all your mods are installed. I've seen people gain 20HP from a tune, some only 5HP, just depends. I paid 600 for my Uprev tune for my 350z. Only gained 7hp, buuuuut, A/F was adjusted to safer level.

04-07-2012, 02:48 AM	#5 (permalink)
MJB A True Z Fanatic Join Date: Aug 2011 Location: Tacoma, WA Age: 41 Posts: 1,498 Drives: a POS truck Rep Power: 496	ECU tuning isn't so much about gaining the HP, but rather adjusting your A/F ratio to safer levels after bolt ons, smoother power delivery, quicker throttle response, increase rev limiter, speed limiter adjusted.. ect... Usually after bolt ons you are going to run lean. I know my 350z was running dangerously lean at WOT after I had full bolt on installed. Stock ECU mapping can only adjust A/F, timing, ect so much... IMHO bolt ons are a waste if you do not get a tune. And yes, even the Nismo could use a tune after all your mods are installed. I've seen people gain 20HP from a tune, some only 5HP, just depends. I paid 600 for my Uprev tune for my 350z. Only gained 7hp, buuuuut, A/F was adjusted to safer level. Last edited by MJB; 04-07-2012 at 02:52 AM.