Nissan 370Z Forum
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Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   Greddy Twin-Turbo In Development (http://www.the370z.com/forced-induction/6028-greddy-twin-turbo-development.html)

LiquidZ 11-01-2009 08:17 PM
Quote:
Originally Posted by Brazilbro (Post 262641)
im also leaning Greddy, thoses Mitsu turbos just last so long.. i went through 2 garretts in 2 yrs compared to 1 Greddy 20g that lasted 3 cars and 5yrs and could be still going for all I know.
:tup:

My only concern about the 20g is that it is only oil cooled. I am wondering if it will superheat the oil on a road course seeing that its the only thing lubricating it. Any opinions?

JoeD 11-01-2009 10:50 PM
Quote:
Originally Posted by LiquidZ (Post 262671)
:tup:

I am wondering if it will superheat the oil on a road course seeing that its the only thing lubricating it. Any opinions?
A TT 370Z has no business on a road-course. If you are planning on attending track-events or racing competitively, stick to bolt-ons.

LiquidZ 11-01-2009 11:03 PM
Quote:
Originally Posted by JoeD (Post 262866)
A TT 370Z has no business on a road-course. If you are planning on attending track-events or racing competitively, stick to bolt-ons.
I won't be racing competitively. I might attend a few track days with the family for fun, and that's it. If I were being competitive, I would definitely be running full bolt-ons. However, this is a street car that might see a track once or twice a year, so a turbo OR supercharger might still be on the table.

JoeD 11-01-2009 11:11 PM
Quote:
Originally Posted by LiquidZ (Post 262870)
I won't be racing competitively. I might attend a few track days with the family for fun, and that's it. If I were being competitive, I would definitely be running full bolt-ons. However, this is a street car that might see a track once or twice a year, so a turbo OR supercharger might still be on the table.
Perhaps a track-event or two per year will be fine given you're not pushing the car to 10/10. However, exposing such a highly modified car to such levels of stress is a recipe for disaster, more often than not.

RCZ 11-01-2009 11:46 PM
well...a TT z with a normal budget has no business on a track. Now, if you have the means....then track away my friend.

aprazma 11-02-2009 11:44 AM
20g is also available as water and oil cooled.


Quote:
Originally Posted by LiquidZ (Post 262671)
:tup:

My only concern about the 20g is that it is only oil cooled. I am wondering if it will superheat the oil on a road course seeing that its the only thing lubricating it. Any opinions?

Scribe 11-02-2009 12:26 PM
I would definitely upgrade to a large oil cooler if I was going with a turbocharger. The Z's engine compartment is a nightmare for heat management.

Heat management is a crucial and usually under-developed portion of a great turbo kit. So says Corkey Bell and my experience. A good 370Z kit is going to need GOOD heat-shields, wraps, covers, etc. And you are going to want to get more air through the engine bay via ducting, larger openings and possibly a vented hood/different front fascia. The perfect FI setup (which I have not seen) is likely not going to place the intercoolers in front of the radiator or will use good ducting to get fresh air around to the radiator. The 300ZX actually had a decent engine compartment layout.

http://us1.webpublications.com.au/st.../2499_10lo.jpg

Scribe 11-02-2009 12:41 PM
Ok, after looking at images of the Z with the bumper removed, the ideal setup would be very close to the 300ZXTT image I posted and would require relocation of the power steering cooler (not really a big deal) and removal of the black plastic blockers behind the "fangs".

LiquidZ 11-02-2009 01:03 PM
Quote:
Originally Posted by aprazma (Post 263164)
20g is also available as water and oil cooled.
Looks like I will be calling Greddy to see if you can upgrade!

Brazilbro 11-02-2009 02:42 PM
Quote:
Originally Posted by JoeD (Post 262866)
A TT 370Z has no business on a road-course. If you are planning on attending track-events or racing competitively, stick to bolt-ons.
Tell that to Forged performace :stirthepot:

B1nks 11-02-2009 02:43 PM
I would have to go with GTM because they are
1: Active on these boards and have made great turbo kits for the Z/G platform for years now and have proven reliable.
2: Their products are made in America (to my knowledge)
3: They cool and there are a few vendors on here that use their stuff also which should speak some volumes for their product. :tup:

protoZ 11-02-2009 05:54 PM
according to greddy they are making just about the same power as the GTM so its really up to preference on who has the better cooling system and intercooler setup. the exhaust is also very critical when building twin turbo cars. you have to remember that each twin turbo is meant to work with each companies own exhaust. taking that into consideration GTM does have what seems to be the better kit due to larger exhaust diameters but im not sure which i would choose because of cooling on these cars is so critical.
:twocents:

XwChriswX 11-03-2009 10:41 AM
Guys here's my debate...

I want to TT my Z eventually... However the funding will take a while to aquire... so do I:

A. Go ahead and enjoy the F.I. 2.5" Exhaust for now, until I can get the GTM TT/3" Exhaust?

B. Go ahead and get the GTM 3" Exhaust so it's something I don't have to buy later?

modme 11-03-2009 11:46 AM
^FI's 2.5 inch exhaust will work fine with GTM twin turbo. I dont post on this forum too much because I have a G37. But I installed my own GTM twins and are running them with 2.5" FI exhaust with High flow cats. I'm making 430whp at about 7 psi.

XwChriswX 11-03-2009 11:48 AM
Quote:
Originally Posted by modme (Post 264350)
^FI's 2.5 inch exhaust will work fine with GTM twin turbo. I dont post on this forum too much because I have a G37. But I installed my own GTM twins and are running them with 2.5" FI exhaust with High flow cats. I'm making 430whp at about 7 psi.
Yeah I've heard that too, I was just curious cause if you wanna go any higher HP wise, you'd do better with the 3" Exhaust. Not nocking F.I.'s in ANY way cause that's what I want actually lol. But if I'm going to get the best bang for my buck, if 3" is what I need, 3" is what I get.

Buddy Revell 11-03-2009 12:40 PM
Quote:
Originally Posted by XwChriswX (Post 264287)
Guys here's my debate...

I want to TT my Z eventually... However the funding will take a while to aquire... so do I:

A. Go ahead and enjoy the F.I. 2.5" Exhaust for now, until I can get the GTM TT/3" Exhaust?

B. Go ahead and get the GTM 3" Exhaust so it's something I don't have to buy later?
Buy the FI exhaust and enjoy it now, then sell it when you get the twin turbo.

JoeD 11-03-2009 01:43 PM
Quote:
Originally Posted by Buddy Revell (Post 264437)
Buy the FI exhaust and enjoy it now, then sell it when you get the twin turbo.
Sure. Or just buy the 3" exhaust now and enjoy that, while not having to deal with the hassle of buying/selling more parts in the future.

Togo 11-03-2009 04:23 PM
Persoanlly, If I was 110% sure I was doing a TT setup, I wouldn't waste the time going with a NA exhaust just to sell it, lose some money on the item and then purchase a new exhaust. I'd either stay stock and do it all at once or I'd get the 3" now and just eat the loss until the TT goes in.

JoeD 11-03-2009 05:08 PM
Quote:
Originally Posted by Togo (Post 264675)
I'd either stay stock and do it all at once or I'd get the 3" now and just eat the loss until the TT goes in.
Eat what loss?

Togo 11-03-2009 05:18 PM
Quote:
Originally Posted by JoeD (Post 264792)
Eat what loss?
Drop in low end torque:icon14:

terrycs 11-03-2009 05:20 PM
3" pipes are great if you want to maximize output for big numbers, but are you really going to go that high? What are your realistic WHp goals?

I can already get to about 470 WHp on my HR-TT with 2.25" exhaust no sweat. I've been in a VHR-TT with 3" pipes and I will tell you that it is loud (to me?), especially when it is started up cold. Just some things to think about if your Z is a daily driver.

@XwChriswX: IMO, do the 2.5" now and enjoy them. No rush to do forced induction until you are sure you are ready. If / when you decide to do so, you can easily get 500WHp out of them.;)

JoeD 11-03-2009 05:24 PM
Quote:
Originally Posted by Togo (Post 264827)
Drop in low end torque:icon14:
Well, you won't have to worry about that. Even with a 3" GTM cat-back, you will not lose low-end torque compared to stock. :tup:

Togo 11-03-2009 05:29 PM
Quote:
Originally Posted by JoeD (Post 264862)
Well, you won't have to worry about that. Even with a 3" GTM cat-back, you will not lose low-end torque compared to stock. :tup:
yeah ok:ugh2:

FuszNissan 11-03-2009 05:30 PM
Quote:
Originally Posted by Togo (Post 264675)
Persoanlly, If I was 110% sure I was doing a TT setup, I wouldn't waste the time going with a NA exhaust just to sell it, lose some money on the item and then purchase a new exhaust. I'd either stay stock and do it all at once or I'd get the 3" now and just eat the loss until the TT goes in.
:iagree:

kdo2milger 11-03-2009 05:33 PM
is this going to turn into an exhaust thread JoeD?

Trips 11-03-2009 05:39 PM
Quote:
Originally Posted by kdo2milger (Post 264889)
is this going to turn into an exhaust thread JoeD?
:stirthepot:

terrycs 11-03-2009 05:45 PM
Quote:
Originally Posted by Triple's (Post 264904)
:stirthepot:
Have we gotten into brakes and tires yet?;)

JoeD 11-03-2009 05:47 PM
Quote:
Originally Posted by kdo2milger (Post 264889)
is this going to turn into an exhaust thread JoeD?
XwChriswX and others were already discussing the topic. I'm just adding to it. One can only expect that exhaust-systems will be discussed in a thread on a turbo-kit with 150+ posts.

So long as people recognize this thread is in a Tech Forum and not OT, it shouldn't turn to crap. :tup:

But going back to XwChriswX's question...I don't see why going with the bigger exhaust now would be cause for concern, unless it it involves a noise/volume issue. In that case, I haven’t heard much about the noise-levels of GTM's 3" exhaust vs. other options.

FuszNissan 11-03-2009 05:48 PM
Quote:
Originally Posted by terrycs (Post 264919)
Have we gotten into brakes and tires yet?;)
:icon18:

terrycs 11-03-2009 05:50 PM
Quote:
Originally Posted by JoeD (Post 264934)
XwChriswX and others were already discussing the topic. I'm just adding to it. One can only expect that exhaust-systems will be discussed in a thread on a turbo-kit with 150+ posts.

So long as people recognize this thread is in a Tech Forum and not OT, it shouldn't turn to crap. :tup:

But going back to XwChriswX's question...I don't see why going with the bigger exhaust now would be cause for concern, unless it it involves a noise/volume issue. In that case, I haven’t heard much about the noise-levels of GTM's 3" exhaust vs. other options.
One thing to keep in mind ... 3" on a N/A car is louder than 3" on a T/T car. Those TTs are damn good mufflers.:tup:

Togo 11-03-2009 05:54 PM
Quote:
Originally Posted by terrycs (Post 264919)
Have we gotten into brakes and tires yet?;)
:icon18::roflpuke2:

JoeD 11-03-2009 05:57 PM
Quote:
Originally Posted by terrycs (Post 264941)
One thing to keep in mind ... 3" on a N/A car is louder than 3" on a T/T car. Those TTs are damn good mufflers.:tup:
Yes, NA cars in general are much, much louder than turbocharged ones. LOL...a turbo or two in your exhaust-system is all the muffler you need. :)

JoeD 11-03-2009 05:57 PM
Quote:
Originally Posted by terrycs (Post 264919)
Have we gotten into brakes and tires yet?;)
:icon18::roflpuke2:

kdo2milger 11-03-2009 06:34 PM
i just dont want this thread getting spun around the axle because you believe that larger diameter exhaust tubing in no way attributes to the loss of low end torque...

RedComet 11-04-2009 06:09 AM
Again with this.....:shakes head:

Valentino 11-04-2009 06:41 AM
Quote:
Originally Posted by terrycs (Post 264839)
3" pipes are great if you want to maximize output for big numbers, but are you really going to go that high? What are your realistic WHp goals?

I can already get to about 470 WHp on my HR-TT with 2.25" exhaust no sweat. I've been in a VHR-TT with 3" pipes and I will tell you that it is loud (to me?), especially when it is started up cold. Just some things to think about if your Z is a daily driver.

@XwChriswX: IMO, do the 2.5" now and enjoy them. No rush to do forced induction until you are sure you are ready. If / when you decide to do so, you can easily get 500WHp out of them.;)
:iagree:

XwChriswX 11-04-2009 08:44 AM
To give more push to why I think I need the 3" is it's my goal to double the HP that I start out with, so if I roughly get ~300HP as a start, I'd like to see if I can break 600WHP. Thats my goal, however far fetched it may be, it's where I would be happy and can say I can move on to something else...

Also, the reason why I wouldn't care is I like volume I like mashing on the throttle and HEARING the engine come to life as you rock back into your seat... So I don't mind the up front cost of getting the 3" if in the end I don't have to trade it out later. I know F.I.'s Exhaust is awesome, but I dunno how many people would want a used one when they can get a brand new one for a great deal from Tony.

terrycs 11-04-2009 09:12 AM
Quote:
Originally Posted by XwChriswX (Post 265852)
To give more push to why I think I need the 3" is it's my goal to double the HP that I start out with, so if I roughly get ~300HP as a start, I'd like to see if I can break 600WHP. Thats my goal, however far fetched it may be, it's where I would be happy and can say I can move on to something else...

Also, the reason why I wouldn't care is I like volume I like mashing on the throttle and HEARING the engine come to life as you rock back into your seat... So I don't mind the up front cost of getting the 3" if in the end I don't have to trade it out later. I know F.I.'s Exhaust is awesome, but I dunno how many people would want a used one when they can get a brand new one for a great deal from Tony.
Breaking 600WHp will not be a problem with a TT. Caution though ... even the VHR-TT with the 3" pipes I was in made 600+WHp. GTM and the owner decided to clip the power output in the end for reliability sake.

If you like the sound of a loud exhaust, you will surely get it with the 3". Maybe it will motivate you to hurry with the TT if it is too loud N/A?;) Here in CA, being less obvious has its advantages.

Something else to think about ... if you are planning on dropping 15 large for a TT, swapping out a 2.5" for a 3" should not even be on your mind. If it were me, I'd be curious to see if I can hit 600WHp with a 2.5". I bet it can be done.

Finally, Fast Intentions can also build their Z exhaust in 3" if you want. Give them a call.;)

XwChriswX 11-04-2009 11:14 AM
Quote:
Originally Posted by terrycs (Post 265870)
Breaking 600WHp will not be a problem with a TT. Caution though ... even the VHR-TT with the 3" pipes I was in made 600+WHp. GTM and the owner decided to clip the power output in the end for reliability sake.

Yeah, I don't wanna push it as far as feasible cause the funding just isn't there IF something were to go wrong. This will be my DD as well as my fun car, so I can't go all out, but I would like to set a goal and achieve it.

If you like the sound of a loud exhaust, you will surely get it with the 3". Maybe it will motivate you to hurry with the TT if it is too loud N/A?;) Here in CA, being less obvious has its advantages.

Yeah that's what I'm thinking, I'm not worried, as far as I know Z's get attention just for being so damm sexy lol So anymore attention isn't going to matter in the long run lol.

Something else to think about ... if you are planning on dropping 15 large for a TT, swapping out a 2.5" for a 3" should not even be on your mind. If it were me, I'd be curious to see if I can hit 600WHp with a 2.5". I bet it can be done.

The TT won't be anytime soon, it will be after a deployment or something like that, parents winning the littery etc. etc. lol. It will take a while to get there...

Finally, Fast Intentions can also build their Z exhaust in 3" if you want. Give them a call.;)
I've just heard that it's better to have the GTM Exhaust if your going with the GTM TT kit since they make them to fit eachother and so forth...

terrycs 11-04-2009 11:37 AM
Quote:
Originally Posted by XwChriswX (Post 265981)
I've just heard that it's better to have the GTM Exhaust if your going with the GTM TT kit since they make them to fit eachother and so forth...
They will both physically fit. It's a matter of personal preference so you'll have to do a little research and compare the two systems.


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