I have done 2 mods to my car so far: CAI + stillen dual cat-back exhaust. Is it necessary to have the car tuned??? Also, what exactly is done to your car when it's getting tuned??
I would really appreciate if I could get some input from some of you guys. Thanks in advance!

 

You cannot Tune your car unless you have a Tunable EMS (Engine Management System). You can do a re-flash but that only erase the Manufacturer setting. With only Exhaust and Intake our computer can still handle it with no problem. If you have Intake/Headers/Exhaust/Plenum upgrade/HFC/..etc.. then it will be good to do a reflash or get an EMS coz you'll be leaning.

 

So, it would be a waste of money and time to tune my car considering the MOD's I have, right? I thought by tuning it or doing a re-flash, I would take better advantage of my MOD's. Well, thanks anyway!!!

 

u will be taking advantage of your mods if you tune

 

Can the dealer tune or do a re-flash?

 

they can probably do it if u ask...but i doubt they will.

reflashes are usually done at aftermarket places such as Technosquare

 

i would wait till u get more mods otherwise youll have to retune again

 

here's a recent thread:
https://g35driver.com/forums/g35-coupe-v35-2003-07/129868-plenum-spacer-new-ecu.html
if you search around, there are a few discussions about this.

 

Alright! Thank you all!

 

A quick guide, if you have ton of Bolt-on mods and you do buy an EMS and tune everything to max every HP then it is a good guide that you will gain another 10+ WHP (Depend on the Tune) on top of what ever HP you are gaining on your Bolt-on. A decent EMS will cost you $$$ and to tune will cost you $$$. So the power to $$ ratio of an EMS+Tune isn't the best out there for Bolt-on. People uses EMS on FI since there are limitless power to squeeze. A reflash doesn't give you the flexibility of a real EMS+Tune and won't get the same HP gain compare to an EMS.

Dealer do not Tune and do not know how

 

Nice!!!!!!! Really good to know all this!!! Thank you so much for your input!!