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Have greddy TT, adding test pipes. Do i need a re-tune?

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  #16  
Old 05-21-2008 | 08:34 PM
sharif@forged's Avatar
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Originally Posted by nyqueenz
I also wanna add to this...

I'm doing a greddy TT setup with the Evo TT exhaust.. I also have Helix test pipes which are 2.5" dia... Is this a good for my setup meaning the test pipes it self.. They have no resonators so it’s a st8 pipe..
That would work just fine.

3 inch downpipes are even better, but they are more expensive, and require more installation labor, and the open dumps are LOUD.
 
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  #17  
Old 05-21-2008 | 09:13 PM
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[QUOTE=App6MT]
Originally Posted by Lawy'dU
it would help since tp and exhaust will cause your car to run more lean. QUOTE]

This would be the main reason you would want a tune. You would make more power by leaning out your tune however you are running the risk of detonation.
hence why you would want a tune lol.
 
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  #18  
Old 05-21-2008 | 09:17 PM
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if my car is running pretty rich, adding the test pipes would lean out my tune a bit right? so would it be safe to run the test pipes without a tune since it will lean out my tune?
 
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  #19  
Old 05-21-2008 | 09:27 PM
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Originally Posted by sharif@forged
That would work just fine.

3 inch downpipes are even better, but they are more expensive, and require more installation labor, and the open dumps are LOUD.

open dump question means.. wastegate opens into the atmosphere not back into the exhast???
 
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  #20  
Old 05-21-2008 | 10:15 PM
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how about the opposite....

What if you take off your test pipes? Do you need a tune?
 
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  #21  
Old 05-21-2008 | 10:59 PM
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From: Marietta, GA
Originally Posted by nyqueenz
open dump question means.. wastegate opens into the atmosphere not back into the exhast???
That's correct. Open dumps vent to the atmosphere, vs. a recirculated setup, that returns the bypass gases back into the downpipe, and out the exhaust system.
 
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  #22  
Old 05-21-2008 | 11:00 PM
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From: Marietta, GA
Originally Posted by G-Mony
how about the opposite....

What if you take off your test pipes? Do you need a tune?
You will richen up, and make less power, but its not unsafe.

So in this case, a retune is not required from a safety standpoint, but recommended, in terms of maximizing your power.
 
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  #23  
Old 05-22-2008 | 02:04 PM
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^ yeppp just retune man.. like I said before get the most out of your mod.. better MPG, most power, and smoother everything
 
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  #24  
Old 05-28-2008 | 05:18 PM
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Originally Posted by sharif@forged
That would work just fine.

3 inch downpipes are even better, but they are more expensive, and require more installation labor, and the open dumps are LOUD.


That's why you route the back into the 3" exhaust at a smooth angle down the line.

 
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  #25  
Old 05-28-2008 | 09:25 PM
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From: Marietta, GA
Originally Posted by ttrank
That's why you route the back into the 3" exhaust at a smooth angle down the line.

That looks great! We did a set a while back. I just wish we could make them quickly, and for less money.

That's the best of both worlds right there.
 
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  #26  
Old 05-29-2008 | 02:49 PM
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lol, looks like a pain to install...
 
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  #27  
Old 05-29-2008 | 03:47 PM
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o ya that does look good but a pain at the same time
 
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  #28  
Old 05-29-2008 | 09:54 PM
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It was.

But well worth it now.
 
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  #29  
Old 05-30-2008 | 06:44 PM
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From: maryland
Originally Posted by ttrank
That's why you route the back into the 3" exhaust at a smooth angle down the line.

Those look allmost to good to put on the car.
 
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