`05 350Z ,i`v just install a hight flow exhaust (APS 2.5) and i will be installing Berk high flow cats and a high flow airfilter (K&n filter + 06 airbox) .should i re-tune my Z ?
my theory is : after changing the air flow going in & out of the engine the air/fuel mixture is changed .
DOSE THAT MAKES ANY SEINES ?

 

yes, you would benefit from a re-tune, but it's up to you to justify if the cost of tuning is worth it for the minor upgrades that you've done so far. i'd do it after i'm done or close to finished with the bolt-on mods.

 

thank you
that makes MORE SEINES ,the thing is that my Z befor i install any thing on the dayno gave me ONLY 212 WHP ,i don`t know whats wrong ???
all my friends Z gave at least 225 >235 WHP
i need help to know what wrong with my Z
so the shop saying that my fuel/air mix not OK ,can some one back that up from the dayno ???

<a href="http://s273.photobucket.com/albums/jj206/Darkness1975/?action=view&current=scan0001.jpg" target="_blank"><img src="http://i273.photobucket.com/albums/jj206/Darkness1975/scan0001.jpg" border="0" alt="dayno sheet"></a>

 

i dyno'ed mine and it gave me 210whp. the tuner told me it's running lean. and the time that i took it for the dyno wasn't good, cuz it hasn't been to service for couple of months now.

anyways, i did take it after the dyno for a full service @ the agency, and i feel it's running a little bit better than it used to be. so i guess this is the same case as yours.

don't do re-flash yet. just wait till u're done with ur bolt-ons.. i got the Stillen CAI, and got a plenum spacer on the way, and i'm about to put an exhaust + headers. after all those being on, i might do a re-flash to the ECU.

 

all the best man they seem a good mods
and you are right i think my Z needs to go to service .