anyone had this problem? i installed some resonated test pipes on my n/a 350z and it jut seems like i lost power, it may just be me but i just wanted to see if anyone has felt or had this problem. i tried to get my car dyno this weekend but couldnt get a spot opened.

 

that's how i felt. when i had testpipe on my 04 , but no i dont think you did , probably lost some low end torque .

 

it feels like i lost more on the high end torque then i did on the low end. it pulls pretty hard in 1st and 2nd...but like when im on the interstate or something and i downshift to gun it, seems like something is missing or power/torque is being lost. i dont know its kind of hard to explain. i guess the best way to explain would be that it seems to pull harder in the high rpm ranges with the cats on. i dont know, i just need to get a dyno i guess.

 

Agree: I feel like I posted this a hundred times:

Any intake or exhaust mod will alter the horsepower and torque curves. You may be trading peak horsepower for low end torque. I haven't the faintest.

 

Its defintaley going to pull harder in the top end of your rpms with the test pipes installed, so there must be a problem.

1.make sure the pipes were installed correctly and dont have any leaks around the gaskets.
2.reset your ecu

 

Most likely any "lost power" can be reclaimed with engine management / tuning / reflash.

Stock cats are a huge restriction, and despite whatever "backpressure" bullsh1t you've read, backpressure is bad. High exhaust velocity is good. Restrictions can create high velocity at low RPM but create backpressure at high RPM.

 

hey wired, did the greddy emanage do you alot of good? i was going to get one from ASAA racing in houston but we were missing the harness. how long did it take for you to get ur Z tuned? over here they want to charge 200 per hour. what gains did you see? im deciding on either the nismo cams or the e manage.

 

I suggest the UTEC for you. I notice you mentioned F/I in March... This will be the best route for your F/I tuning needs! Plus when you tune now you free up some extra hp.

 

I'm still trying to get an appointment to get tuned.

A lot of tuner garages don't ever check phone messages, and they're busy all day so it's hard to get people on the phone.

 

I've got the Strup headers and test pipes and I didn't notice any power loss, quite the opposite.

Does a reflash make a big difference?

 

NM, I found the answer in the 100 most asked questions thread.

 

When I installed my test pipes the car turned into a monster. The top end is much better, plus the throttle response was great. I did however feel the loss of torque at low rpm.

 

would you suggest the utec over the greddy Emanage? what would be the difference?

 

UTEC has a lot of advantages over the Emanage... but I think most people opt for getting an aftermarket wideband sensor put in to work with the UTEC. The wideband adds a lot of additional cost as well as some labor (you need to get a bung welded into your exhaust somewhere)


The Emanage ... if it worked perfectly, then when all maps were set to "zero" then it should behave just like stock and would be easy to tune.

The problem is, it DOESN'T behave just like stock.

Emanage should work okay for N/A applications but you had better have a decent tuner.

UTEC also allows you to set timing to a stable number, whereas the Emanage can only do offset timing (like Plus or minus timing from stock). But, like I said, it doesn't behave exactly like stock when the offsets are set to zero. So... Emanage is kind of tricky but should still be fine for N/A applications

If you have the money go for the UTEC

 

I'm getting my installed and tuned tomorrow.

 

Thanks Wired for the info!! I think im going to go with the UTEC.

 

Me too, when I get an extra grand......lol.

 

PM Jason @ World one. That's where I ordered mine. Great guy and Great store! Link in my sig.