how bad would it be to have a GThaus exhaust with a turbo mod.

UNKNOWN_370 · 12-09-2011, 02:55 PM

My long term plan is to get a turbo in my car once I reach 36k miles. Just because I know if anything bad is going to happen to my car as far as recalls etc. It will happen within that amount of time. For the shorter term I am ready to do something about this wacky-doo exhaust. Its driving me nuts. It doesn't sound like a real sports car. Only the first 2 minutes the car is on from a cold start does it sound like a real car. Then it dwindles into a sedan-like drone. It annoys the hell out of me.
GThaus has the remedy. There's a black 7at on youtube with the GThaus and it sounds like a beast. This is my thing. I can buy a why pipe and hfc and just wait to get a turbo, to get a turbo exhaust. Or I can get the GThaus now. But if I buy the GThaus I am NOT Buying another exhaust till my GT falls off. That B1tch is pricey. If I went the GT route? How bad would it be for my turbos? And what is the best advice you guys would give me?

PS... I'm going to leave the misspell. But I really got a kick out of "BUY A WHY PIPE". LMFAO

:inoutroflpu ke:

Red__Zed · 12-09-2011, 03:07 PM

Don't forget the option of selling the gthaus if your turbo plans call for something bigger. They hold their value very well

Jeffblue · 12-09-2011, 03:09 PM

it sounds like a quiet sedan like drone because well.... its the same engine thats in the maxima and altima and G and M.

UNKNOWN_370 · 12-09-2011, 03:43 PM

Quote:

Originally Posted by Jeffblue

it sounds like a quiet sedan like drone because well.... its the same engine thats in the maxima and altima and G and M.

Not necessarily. these cars are loaded with resonators in different areas depending on the model. Some are more muffled than others. I just don't think pulling out the resonators on this 370z will be enough. I think it just needs a better engineered exhaust.

UNKNOWN_370 · 12-09-2011, 03:50 PM

Quote:

Originally Posted by Red__Zed

Don't forget the option of selling the gthaus if your turbo plans call for something bigger. They hold their value very well

You have a point but I just don't want to be in a position to not have a buyer when I need one. Then sell it for peanuts.

Jeffblue · 12-09-2011, 03:57 PM

i saw a TT 370z yesterday at a meet that had the GThaus exhaust.... i'm not sure what you are worried about why you'd have to sell it.

UNKNOWN_370 · 12-09-2011, 04:02 PM

Ok... on the Z34, my research has shown that 3" exhausts are best to run on turbos and come highly recommended. I don't know why the bigger exhaust is needed for the turbo. GThaus runs 2.25". I figured it has something to do with turbos needing less backpressure from the exhaust? That's my educated guess. If this is so? Would more backpressure from the exhaust make the turbo less efficient?

Jeffblue · 12-09-2011, 04:07 PM

Quote:

Originally Posted by UNKNOWN_370

Ok... on the Z34, my research has shown that 3" exhausts are best to run on turbos and come highly recommended. I don't know why the bigger exhaust is needed for the turbo. GThaus runs 2.25". I figured it has something to do with turbos needing less backpressure from the exhaust? That's my educated guess. If this is so? Would more backpressure from the exhaust make the turbo less efficient?

i'm not sure about this exhaust in particular. i have a 2.5" exhaust on my 300zx. 3" downpipes definitely help with spoolup, but after the testpipe (which on mine are 3" to 2.5") there are definitely some top end gains to be had, but that comes with a lot of added noise. a lot of people i know with 300zx's get 3" exhaust then hate it after a while and switch back to 2.5"

NYBladeZ · 12-09-2011, 05:34 PM

I think the GT Haus is 2.5" at the inlets of the Y pipe and for sure 3" at the connector then 2.5 to the muffler.

Jeffblue · 12-09-2011, 06:18 PM

i think alex at performance motorsport has one on his TT nismo... shoot him a PM about it if you are curious.

ksm144 · 12-09-2011, 06:58 PM

I had Tony from Fast Intentions measure the GT Haus inlet Y-Pipe and it measured at 2.17 and little less than 3.00 at the outlet. The catback section piping is 3.00. To be honest I was disappointed about the Y-Pipe measurement. However, it stills sound like a beast and can live with it.

NYBladeZ · 12-10-2011, 01:52 PM

So on another thread under the exhaust forum, Motordyne explains why the Y pipe primaries are so small. In N/A applications, having smaller inlets closer to the engine help with scavenging leading to better gains than a 2.25 or 2.5 inch. I learned something new today but it explains the reason for the smaller inlets.

JIC Ti - 80mm OK for N/A? - MY350Z.COM Forums

UNKNOWN_370 · 12-11-2011, 08:10 PM

Thanks for the info guys... sorry I took long to come back to my own thread. Just got caught up with christmas shooping etc... going to view all posts now.

UNKNOWN_370 · 12-11-2011, 08:20 PM

Quote:

Originally Posted by NYBladeZ

So on another thread under the exhaust forum, Motordyne explains why the Y pipe primaries are so small. In N/A applications, having smaller inlets closer to the engine help with scavenging leading to better gains than a 2.25 or 2.5 inch. I learned something new today but it explains the reason for the smaller inlets.

JIC Ti - 80mm OK for N/A? - MY350Z.COM Forums

Wow, thank BladeZ. That was more info than I ever thought i'd get and I sure learned a lot from that thread and I'm not done reading it yet.

Thanks for all your contributions guys. I will go back and finish reading now.

Updating my final post by saying that I have changed my mind and will be going with one of the 3"inch turbo exhausts. Most likely either GTM or AAM.

12-09-2011, 02:55 PM	#1 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	how bad would it be to have a GThaus exhaust with a turbo mod. My long term plan is to get a turbo in my car once I reach 36k miles. Just because I know if anything bad is going to happen to my car as far as recalls etc. It will happen within that amount of time. For the shorter term I am ready to do something about this wacky-doo exhaust. Its driving me nuts. It doesn't sound like a real sports car. Only the first 2 minutes the car is on from a cold start does it sound like a real car. Then it dwindles into a sedan-like drone. It annoys the hell out of me. GThaus has the remedy. There's a black 7at on youtube with the GThaus and it sounds like a beast. This is my thing. I can buy a why pipe and hfc and just wait to get a turbo, to get a turbo exhaust. Or I can get the GThaus now. But if I buy the GThaus I am NOT Buying another exhaust till my GT falls off. That B1tch is pricey. If I went the GT route? How bad would it be for my turbos? And what is the best advice you guys would give me? PS... I'm going to leave the misspell. But I really got a kick out of "BUY A WHY PIPE". LMFAO:inoutroflpu ke: Last edited by UNKNOWN_370; 12-09-2011 at 02:58 PM.

12-09-2011, 05:34 PM	#9 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	I think the GT Haus is 2.5" at the inlets of the Y pipe and for sure 3" at the connector then 2.5 to the muffler. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

12-09-2011, 06:58 PM	#11 (permalink)
ksm144 Base Member Join Date: Jun 2011 Location: Fresno Posts: 38 Drives: 2010 370Z 40th Rep Power: 14	I had Tony from Fast Intentions measure the GT Haus inlet Y-Pipe and it measured at 2.17 and little less than 3.00 at the outlet. The catback section piping is 3.00. To be honest I was disappointed about the Y-Pipe measurement. However, it stills sound like a beast and can live with it. __________________ GT HAUS Exhaust / FI High Flow Cats / K&N Air Filters / UPREV Tune

12-10-2011, 01:52 PM	#12 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	So on another thread under the exhaust forum, Motordyne explains why the Y pipe primaries are so small. In N/A applications, having smaller inlets closer to the engine help with scavenging leading to better gains than a 2.25 or 2.5 inch. I learned something new today but it explains the reason for the smaller inlets. JIC Ti - 80mm OK for N/A? - MY350Z.COM Forums __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

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12-09-2011, 03:07 PM	#2 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	Don't forget the option of selling the gthaus if your turbo plans call for something bigger. They hold their value very well

12-09-2011, 03:09 PM	#3 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 37	it sounds like a quiet sedan like drone because well.... its the same engine thats in the maxima and altima and G and M.

12-09-2011, 03:57 PM	#6 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 37	i saw a TT 370z yesterday at a meet that had the GThaus exhaust.... i'm not sure what you are worried about why you'd have to sell it.

12-09-2011, 04:02 PM	#7 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	Ok... on the Z34, my research has shown that 3" exhausts are best to run on turbos and come highly recommended. I don't know why the bigger exhaust is needed for the turbo. GThaus runs 2.25". I figured it has something to do with turbos needing less backpressure from the exhaust? That's my educated guess. If this is so? Would more backpressure from the exhaust make the turbo less efficient?

12-09-2011, 06:18 PM	#10 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 37	i think alex at performance motorsport has one on his TT nismo... shoot him a PM about it if you are curious.

12-11-2011, 08:10 PM	#13 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	Thanks for the info guys... sorry I took long to come back to my own thread. Just got caught up with christmas shooping etc... going to view all posts now.