350Z400rwhp

iTrader: (4)

Just being impatient and wanting to install this exhaust. I currently have the stock exhaust with test pipes. I have read for turbos that boost would be increased for this circumstance but I have a supercharger. In theory would my air fuel be richer or leaner since my boost should be a bit less? Or should I just wait till things warm up and install this exhaust right before I add my 2.87 as I am having a re-tune for that anyway?

P.S. Go ahead and flame away, my new exhaust is an XO2. What can I say it was $450 shipped to my door and looks good to me.

Mr_pharmD

iTrader: (48)

why not install everything now and it get it over with.

Jay'Z

iTrader: (118)

Not necessary, but you will need to replace those tips with real Titanium tips.... FYI..

txshldm

iTrader: (4)

If your gonna put the 2.87 on there you should just do it all at once. Just my .02. FI cars are sensitive...

350Z400rwhp

iTrader: (4)

I was wanting to run the 1/4 for a baseline with my 3.12 and the track doesn't open for another month.

Car vs. Driver

iTrader: (14)

+1 ... although I wouldn't expect any huge issues with an exhaust change prior to the tune.

350Z400rwhp

iTrader: (4)

Ok guys basically I can't justify spending $500 + driving expenses (seems to be the going rate for shops on here) for a tune right now and I don't trust my local shops that would tune my car for $200 even though they have had experience with a few 350Z's and have tuned friends cars over the years without any issues. I really want to add my exhaust that has been sitting around for a month or so (a true dual), I have a stock exhaust with test pipes now. I was hoping since I am supercharged I can get away with this. I know everyone will have different theories on this and many will say just wait and get it tuned. I am willing to do that and just wait until I am more comfortable with spending $500-$600 but wouldn't a free flowing exhaust reduce boost pressure and heat since it will flow better thus making my tune safer? The other thing I was thinking is that while boost may be less there may be more airflow making things more dangerous. I know with turbos it will raise boost and really throw things off but with a supercharger I figure things would be different. I'm just trying to get theories on what the effects are from adding a free flowing exhaust would be without re-tuning. I'm in Ohio so if any shops on here can tune my car for a reasonable rate please pm me. Again, I know that I am basically asking the same question I asked when I started this thread but just trying to make a final decision here and get some theories. Hopefully a reputable shop on here can give me a good deal on a tune as times are just tough right now.

Chef-J

iTrader: (58)

Sent you PM.

Jay'Z

iTrader: (118)

If you listen to the X02 on my thread in Shop builds.. Its sick with a built engine!!

350Z400rwhp

iTrader: (4)

Hey Jay Z, I looked at your thread. Glad to see you got everything worked out! I couldn't find the XO2 clip though?

str8dum1

iTrader: (11)

not sure why you just dont log it and see if you knock or what your AFR is. then you can answer your own questions.

350Z400rwhp

iTrader: (4)

Actually been thinking of doing this. If I hook up my laptop will it tell me if I have had a knocking event or do I have to have the laptop hooked up while driving it to see if this is happening?

str8dum1

iTrader: (11)

well u will need your laptop on to log. logs capture knock events and the associated reduction in timing.

eltness350

iTrader: (58)

i added exhaust a few months after i got my procharger tuned....my tuner said now the car will just run more efficient....i lost like 2psi of boost also from it bein more free flowing since blowers like a lil backpressure....u wont hurt anything...

350Z400rwhp

iTrader: (4)

So if I am understanding you correctly, I would have to have my laptop hooked up during the knocking event to log it? Or does the utec store the event and report in when I hook up my laptop?

JonnyC

iTrader: (19)

According to the manual, the UTEC in Dashboard mode records the last knock event. However, that might not be persisted when the car is turned off - I don't know.

Whenever I make any changes to my car/tune I make sure to have my laptop plugged in and logging while I'm driving. I currently use the UTI software though, which will give you an audible alert and can be set to only log if knock is detected.

Hopefully I'll find the funds this year to install a touch-screen carputer to always be monitoring what's going on.

str8dum1

iTrader: (11)

^+1
yes you have to actually be logging thru your laptop. the utec doesnt store anything on its own without you connected to it