GTM Motorsports Twin Turbo vs Greddy Twin Turbo Kit
 

I was looking at Z1 motorsports and saw the two differenct Twin Turbos for 370z and im looking for imput on the pros and cons for both. I saw were the GTM Motorsports VQ37HR Twin Turbo Turn Key Kit has a stage 1 through 4 selection were the Greddy kit does not. So thats one up for the GTM ......

From Sam@GTM

Just a little clarification

Greddy turbo kit is a tuner kit meaning that it does not come with neither fuel system,engine management and not even blow off valves so it needs to be compared to our SET-UP KIT set up which has three different stages vs one option from Greddy and also much cheaper with better components .

GTM Motorsports*::*FORCED INDUCTION*::*GTM-370Z-(SET-UP) TWIN TURBO KIT


Our TURN KEY kit is the only compete twin turbo kit on the market that comes with every thing you need to do the install and has four different stages .

GTM Motorsports*::*FORCED INDUCTION*::*GTM 370Z (TURN KEY) TWIN TURBO KIT


Then we have our TUNER KIT that offers 6 different stages from 500 hp to 1200 hp .

GTM Motorsports*::*FORCED INDUCTION*::*GTM-370Z-(TUNER) TWIN TURBO KIT


Hope this help
Sam

thanks alot, sorry if it was a dumb question i'm new to turbos and just trying to learn all i can

Thank you Matt.

Sam

No not at all, We do offer a lot of options and it takes a little time to grasp it all .

Sam

go with the GTM kit you will not be disapointed. Best aftermarket company in dealing with this type of stuff.
Frank

No dumb question(s), I was a noob to forced induction, Sam has helped me a lot along with a great group in Houston. :tup:

I'm wanting a kit that comes with everything i need for sure, fuel and engine management, BOV's, intake system, ect.... I'd also like around 700hp but the option to grow is nice. And from what I can tell the GTM Turn Key Kit that Z1Motorsports offers comes with everything i need???

yes it does and it also comes with exellent customer service. Like I said GTM is the best stick with that and the turnkey and you will be happy and will not regret it for one second.
Frank

okay, now just to figure out all the other mods i want so i can have Z1 install them all at one time

I can help with that if you don't mind. First, oil cooler(I went with the GTM competiotn one, works great)

Second I recomend you getting a exhaust I went with the HKS one and it has a Stock sound to it which is what I wanted. It starts to wake up in the higher RPMS.

Next I would sugest test pipes or hi-flow cats. This is not a must but it will help the turbo breath better.

Also your going to need a boost controller. I went with the EVC-S since it does what I need and I also didn't need all the extra stuff that came with the EVC-6, but that is your decission since you might be going a different route.

Last some type of guage system I don't think it is a dire rush since they can verify everything on the dyno but eventully I recomend it. I didn't want guages all over my car so right now I am saving up to get the Blitz system that will display everything through my gps. If you don't have that then maybe if you want to hide them you can put them in your center cubby hole. Just a few Ideas but this is what I recomend ou go with.
Hope this helps
Frank

Video of exhaust sound and car please?! :tup:

I'll post one in my thread don't want to de-rail this completely.
Frank

Thanks Z1 has some nice oil coolers that im looking into. Then im looking at getting Greddy Turbo Ti-C True Dual exhaust and some Stillen headers, but idk what will help my turbos better High Flow Cats or Test Pipes?

Do Not Buy headers. The GTM kit comes with headers since that is what the turbo bolts to. As for breathing better the test pipes will be better but just depends on your laws. I know NJ does emission testing and they also do a inspection for where they make sure Cats are on your car so when that happens I will have to put the stock ones on for that. But that is your choice.
Frank

Edit: ^^^^ This above.

Would Stillen Headers fit with the turbo kit???

No unless they were designed to have a turbo bolt to it which I highly doubt.
Frank

Hope your saying that you want turbos soon, bro!!! :happydance::driving:

All a matter of convincing the Mrs. of the need to drop 10k into my car...lol and maybe ask her for a loan from her deployment stash while she's off fighting the war in Afghan....lol More then likely that's a hell no, and I'll end up on my own. Especially because she watched me drop all that stuff into my G, only to total it with her in it (not my fault of course) lol....But one day :eekdance:

NISMO221,
The Stillen Headers and normal 370z test pipes are not necessary. The GTM Kit comes complete with the necessary turbo manifolds, hardware and down pipes with their kit. The Greddy Ti-C exhaust WILL be a nice upgrade though and sounds great on a GTM TT 370z!

If you would like to hear what a car with this setup sounds like, I invite you to come by the shop. We have a 7AT '09 370z here now that has this exact setup on it.

These guys are giving you great advice. I think it was Toner that said boost controller, oill kit and exhaust. I like Greddy and actually make better profit off of their kit but I would have a turn key kit over a tuner kit(ball bearing FTW). Let me know when you want to do this.

Hahaha Love that quick response time Matt. Must you must have an app for that..........JK

Okay thanks everyone for the info, I really am lost when it comes to turbo systems and setups.

Anyone know of a good website to fined a pillar pod for the boost gauge? and other ideas where to mount the gauge. I thought about removing the small box where the GPS goes in other models and making a plate to hold the boost gauge and a boost controller. Anyone know if the box could be removed easy or if all that would even fit there?

Also its alittle off subject but has anyone ever dealt with Z1 Motorsports in Georgia? I know about a 3 months ago I was going to take my 1990 300zx up there for a complete over haul, like $26k worth. But I had alot of questions and the guy did not seem to want to talk. Idk im sure I was asking stupid questions and the guy was busy. But Im new to this and I want to understand everything Im having done. This is one of the reasons I went ahead and bought a 370z. Im sure everyone at Z1 knows Zs inside and out, thats the reason Im still considering taking my new 370 there. But I need someone that will work with me. So has anyone else had this problem or did I just call them at a bad time?

There is the option to remove the 3 gauges which hold oil temp, voltage and a clock and replace with other gauges.
You can also run digital gauges like I have.
http://lh3.ggpht.com/_wgFNZZBDMaE/TE...Screen%201.jpg

I can say I know what your talking about. They did the same to me years ago a couple of times. Even flat out lied to me. I've always prayed to see him again. Then I see above there acutally posting they like the Greddy kit when years ago they told me it was the worst kit on the market. Probably due to they were a APS distributor at the time. So I went down the road and stayed away from them at all cause. They seem to have there own little following. Now I know alot more so I know how to sort at all the BS most shops give you.

I never dealt with z1 personnally but I heard good things about them. As far as the greedy situation idk but he clearly said in his post that he would go with the gtm kit over the greedy kit. He also said he makes more money off the greedy kit and he still is saying go with the GTM kit. I think that is honesty right there and him not trying to sell him a lesser quality product so he can make more money. So for that in my opinion +1 to Z1
Frank

Never dealt w/ Z1 personally, but i would go talk with them, and probably do some research on some other boards with previous gen Z's and read reviews from other customers. Remember if for some reason you aren't satisfied, the best thing about the GTM kit is that you can actually have them do the install. They aren't just a manufacturer or importer like GReddy is.

I can't stay out of this damn FI section.It's like an itch that just won't go away! I hate you the370z.com, soon my wallet will hate you too!:excited:

if its a manual a clutch would be a good add on but you might explode your csc. just a discliamer might not happen, might happen anyway.

SPOHN and NISMO221,
Like I have mentioned in previous posts, I take all of these statements and issues very seriously. I do not want to tie up the forums with details, but if possible, please PM me who you spoke with. I am fully aware people have "off days", but this experience has obviously left a bad impression that I WANT to make sure is corrected. In the future, I invite you to contact me directly if you have any questions or need any help.

My direct desk extension is 770-838-7777 extension 309.

NISMO221,
I personally own 2 Z32s as well, so I would be more than happy to help you out with either your 370z or 300zx.

SPOHN,
I hate to hear that we have apparently lost your business. Again, I would appreciate it if you would PM the name of the individual you worked with. I will admit, there has been some shifting of employees over the past few years here. Our current staff is completely different from what it was 2 to 3 years ago. If you would give me the chance, I would like to prove to you that we are in fact a completely different company internally. I am not saying that you may become one of our "followers", but I would like for you to feel that you do have the option and ability to call or visit us whenever you have questions, are in the area or looking for parts.

PM sent.

I would like to aplologize to Z1 here on the boards for my remarks for they were negative. Even though they were true at the time years ago. I'm sure they have been resolved or addressed. Sometimes a post strikes an old nerve and I responed without thought. No harsh feeling towards Z1. I shouldn't of brought up old crap. I know I wouldn't want that against myself.

SPOHN, good post, mate. I know you well and I know you are a stand up guy. I also know many of the guys at Z1 and can say that they have weeded out all of the 'bad apples' and are a great group to work with. Russell, Spencer, Jon, John and Dustin have really helped me out when I needed it and I would put my name behind these guys any day of the week. Sorry to hear you had a bad experience prior...and I can say that I empathize and feel your pain. That said, I can say that in the present, this shop is a great place to visit and have work done.

Hope you are well, bro. We need to get up soon.

- J

NISMO221 -

I cut this from my build thread, but I hope it helps. Here are my reasons for going with the GTM kit over the GReddy.

Here are my reasons:

1. GOALS - I set my power goals at a maximum of 450-475 to the wheel. Though the GTM kit is scalable from 400 to over 1000whp with the Stage 2 through Stage 6 kits, I have found that anything over 450-500whp is a pure waste on the street. Traction issues keep the car slower out of the hole and cause drivability issues that I no longer want. As the street is where I do 100% of my driving, I have no need for anything more than a Stage 2 setup and 475whp. The GTM kit easily met my power goals.

2. QUALITY – There is no doubt that all three kits are of great quality. Some more so than others, of course, but nonetheless, they will all get the job done. The GTM and GReddy kits are both spectacularly designed with what surely looks to be a lot of thought and engineering behind them. The only concern I had with the GTM kit was the spacing of the power train that has to happen. But, I have researched and put my concerns to rest over this issue as it is a moot point and does not affect drivability or functionality of the car in any form or fashion. The down-side to the GReddy kit is the known issue of manifolds cracking which can be a great headache to repair. That and the lesser quality turbos. (IHI vs. Garrett)

3. OPTIONS – As trivial as this might be, for me, I prefer having options for detail items when purchasing a kit. Over the past few years I have learned that unless a manufacturer can cater to my anal-retentiveness and provide a “one stop shop” for all that I need, I will look elsewhere. The fact that I have options with the GTM kit such as black couplers, choice of polished or powder coated piping, choice of polished or thermo-coated intercooler, and optional ceramicoated manifolds and turbo exhaust housings, all at a reasonable cost, was just one more small detail that led me to choose the GTM kit.

4. ENGINEERING – One key factor for me is longevity of the kit that I purchase. A lot of parts are static and do not wear, so with every kit I have researched, these items are seemingly equal when it comes to predicted life-span. But, the major components – the turbos – are what interested me the most and certainly, in this regard, not all are created equal. The GTM kit uses Garrett ball-bearing, water-cooled turbos while the GReddy kit uses journal bearing, oil-cooled turbos. Given that the 370Z is plagued by oil temperature issues, one would think that the oil-cooled turbos would not be a considerable option. GReddy seemingly addresses this with a larger capacity oil pan and optional oil cooler, but I was (am) not convinced this would alleviate the faster degradation of the turbos that will certainly happen without these items.

I was considering talking to Z1 about installing a GTM Stage 4 turbo setup. But my Z is a daily driver. But im assuming I could just tune down the boost with a controller while street driving, am I right?

If you are going TT, don't get the headers, because you won't need them, get the turbo downpipes instead. The GTM 3" downpipes are perfect for you.

I think for daily driver, the stage 4, GT30R turbos are gonna have more lag than the GT28, it's good for daily driving, cause you won't hit boost all the time. But when you are ready to play, just turn up the boost, and there you go, but with that bigger turbos, build your motor just in case.

I dealt with z1 just a bit and it was a mixed experience at first but Dustin is good sh!t and figured it out in the end. I had more problems with nissan backordering my stub shaft for 2 months, hope you never have to get anything from nissan that is backordered because you can call all the parts suppliers you want and you still won't get it for months.

I would think that unless you are going to build the motor to push more psi the stage 4 might be overkill for you. Without the added boost you may not get the power curve that you are looking for, end result the car not "feeling as fast" as you think it should. I suggest talking over your options with Z1/GTM to get best advice. Take a realistic look at what your "needs" are and plan ahead of time to achieve that. It is so easy to just blow money on parts that may or may not be overkill for your intended purpose.

+1