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  #25  
Old 04-01-2014, 09:31 AM
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Re: GTHaus Review From a Different Perspective

Just a little update. I don't have any solid numbers but I'm still comfortable commenting on performance from the GTHaus.

In open mode I have without a doubt lost power over my custom setup. It doesn't have the same getup off the line, and yes I have taken weather into account. It does however seem faster up top. This would be in line with what I've learned about headers on these. Lost low end torque with gains higher up.

In closed mode I haven't played with it enough to comment. It still doesn't feel as torque happy off the line as it did before. Being a slight difference this could definitely be caused by the change in weather.

Overall, no question about it the GTHaus sounds better than my custom setup in both closed and open. However, I feel the performance was better with my custom setup.
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  #26  
Old 04-01-2014, 10:05 AM
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Originally Posted by A-kon View Post
Just a little update. I don't have any solid numbers but I'm still comfortable commenting on performance from the GTHaus. In open mode I have without a doubt lost power over my custom setup. It doesn't have the same getup off the line, and yes I have taken weather into account. It does however seem faster up top. This would be in line with what I've learned about headers on these. Lost low end torque with gains higher up. In closed mode I haven't played with it enough to comment. It still doesn't feel as torque happy off the line as it did before. Being a slight difference this could definitely be caused by the change in weather. Overall, no question about it the GTHaus sounds better than my custom setup in both closed and open. However, I feel the performance was better with my custom setup.

I agree. I notice a loss of power off the line when open. I don't think I lost any power with it closed. Anytime I go to the drag strip though I always keep it in closed mode. I agree though when it is in open mode and I am going full throttle on the highway that is feels to have much more push than if the valves were closed.
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  #27  
Old 04-02-2014, 02:35 PM
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Originally Posted by 14StormTrooper View Post
I agree. I notice a loss of power off the line when open. I don't think I lost any power with it closed. Anytime I go to the drag strip though I always keep it in closed mode. I agree though when it is in open mode and I am going full throttle on the highway that is feels to have much more push than if the valves were closed.
I'm sure someone has already asked the question? But is anyone close to installing the GT Haus exhaust that also has access to a dyno to see what / if any gains are made from stock? Interestingly I would have thought a loss of power would have occurred in closed mode ( now obviously I'm not a mechanic ) because the air flow sounds restricted in closed mode.

Just curious as I am seriously considering purchasing it through Black Ops ( Chad )

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  #28  
Old 04-02-2014, 02:50 PM
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Re: GTHaus Review From a Different Perspective

From my understanding there are two reasons:
1. The 6.4L motor needs a certain amount of back pressure. I don't think there is any HP loss in open mode, only low end torque. I came to this conclusion because that is what people were seeing with headers. Same concept, more exhaust flow, less restriction, resulted in lost low end torque but big gains up top.

2. The stock tune can't adjust for such a large increase in exhaust flow. I think this is tied in to number one.

Closed mode I don't think you'll lose any if much. It will still probably outflow stock. There are no resonators, only small mufflers.
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  #29  
Old 04-02-2014, 03:10 PM
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My rig is booked in on the 9th, I'll try for before and after dyno. If my dude has time and can do it, I'll post up what it runs stock, and with the exhaust.
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  #30  
Old 04-02-2014, 08:36 PM
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Re: GTHaus Review From a Different Perspective

I need this exhaust soooo bad!!

But…we are moving to NC this July and it will run me $4K just to ship the SRT and my 370Z there from San Diego. I'm also newly engaged, so that doesn't help. Hopefully I can get it by next spring; until then I will continue to listen to these videos over and over. Thanks for posting them!
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  #31  
Old 04-02-2014, 08:43 PM
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Re: GTHaus Review From a Different Perspective

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Originally Posted by RN SHRRK View Post
I need this exhaust soooo bad!!

But…we are moving to NC this July and it will run me $4K just to ship the SRT and my 370Z there from San Diego. I'm also newly engaged, so that doesn't help. Hopefully I can get it by next spring; until then I will continue to listen to these videos over and over. Thanks for posting them!
Just do 1 PC now LOL
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  #32  
Old 04-03-2014, 04:21 AM
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Originally Posted by vvM1LESvv View Post
My rig is booked in on the 9th, I'll try for before and after dyno. If my dude has time and can do it, I'll post up what it runs stock, and with the exhaust.
Great, I look forward to the results :-)
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  #33  
Old 04-03-2014, 10:19 PM
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Re: GTHaus Review From a Different Perspective

That video going through the underpass made me shart a little. Holy wow, that exhaust is intense.

Also felt it necessary to comment on someone's SRT instagram I started following recently, that was "scaring" Prius drivers revving his engine with the ATAK. I told him they were probably thinking he should've gotten a GTHaus because it sounded so quite. He blocked me shortly after.



*I'm sure he's a member here. I just couldn't resist.
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  #34  
Old 04-04-2014, 08:43 AM
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Re: GTHaus Review From a Different Perspective

^ :rofl:

Hilarious!
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  #35  
Old 04-04-2014, 10:40 AM
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Re: GTHaus Review From a Different Perspective

Just a heads up I only have a few more this month available if you want one before the end of May don't wait.
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  #36  
Old 04-04-2014, 11:06 AM
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Re: GTHaus Review From a Different Perspective

Update on performance in closed mode:

Today's weather: 62 degrees. 68% humidity.
Weight: 3/4" tank gas, 275lb driver + 200lb passenger
Launch: stock launch control setting which jumps up to 3000rpm if I hold it long enough

0-60 in 4.5 seconds in closed mode. Given the conditions, I don't feel like I lost any performance. I was going to do a second run 5 minutes later in open mode to compare but there were a lot of police in the area.
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