i been trying to decide wich to go with HFC and Test pipes well since im in Miami i ordered the Fast Intentions Res test pipes in SS i cant wait i will pair these with my Nismo exhaust and JWT dual pop chargers i will post pics

 

Resonated test pipes with Nismo exhaust sounds good!

 

im curious to c what my exhaust will sound like kind of worried and excited at the same time. i almost went with AAM but i couldnt resist FI quality i got them 350 shipped from TH motorsports

 

is there a CEL fix for test pipes on HR's yet?

 

yeah.... its called an o2 simulator

http://www.o2simulator.com/index.php...products_id=10

 

I dont know anyone who has used an O2 simulator on an HR with success yet. everyone always says yes it works then come back a week later to say the CEL came back. If somebody has done it successfully tell me who cuz I need to do it too.

 

When you get it installed, PM me. I want to compare the sound of your exhaust to mine. I have a Nismo Exhaust with High Flow cats. I don't get any drone what so ever and when I WOT it screams. I get alot of compliments. I hope that the Resonated TP's sound good but with out a rasp. "Rapiness is next to Riceiness."

 

When you use test pipe correct me if im wrong will you not loose torque? There is no back preasure like a HFC would have. I know when I was into my sr20 cars we only used test pipes being that the turbo got recieved back preasure from the down pipe ect.

 

Nothing noticeable. People say that you lose a very small amount of power in the early rpm's. Test pipes provide nothing but gains, one of the best bang for the buck mods.

 

you lose a little low in power when you have test pipes because there is no backpressure, but gain at high rpms. You will see if you get some. And the best bang for the buck for NA is a plenum spacer.

 

You don't lose power because there is no backpressure. You don't want backpressure. You lose power because you lose velocity. There is a balance between flow and velocity, and when you find that happy medium is when you make the most power.

Think of blowing through a straw and a paper towel tube. The straw has more velocity, less flow, but the paper towel tube has more flow, less velocity. Somewhere in between is where you want to be.

That being said, yes, you will probably loose some torque in low rpm's from decreased velocity, but when the rpm's increase, velocity isn't as much of a problem as the mass of air expelled by the engine is greater so you end up with more power when the engine speed overcomes the decreased velocity from less of a 'restriction'.

 

back pressure gives you low end tq. I don't care who u are if you put a cat back exhaust and test pipes you will notice lose of power at lower rpms. Almost Every vehicle I have owned I have put exhaust and resonated test pipes on had the same effect.

 

No. VELOCITY gives you low end torque. Not backpressure. *sigh*

 

if I still had my NA dyno sheet before & after my exhaust and test pipe install it would prove u wrong. that was about 7 months ago

 

You obviously don't understand what I'm saying. I'm not arguing with you, I'm correcting you.

 

whatever *sigh* we both just have different opinions...

 

Hahaha..........ok.

 

i took the silencers off the turboXS and i have berk test pipes trust me, its loud. when i step on it ROARS, but theirs power to back it up

 

agreed. im really wrestling with the test pipes vs HFC decision. the cel issue def makes me lean toward HFCs.