Why is the Greddy kit $1500 more than the GTM? I understand that the GTM has ball bearing turbos and are either water or oil cooled so doesn't that make GTM better than Greddy? Greddy does bring an EMS but one could be had for a lot cheaper.. inputs please!

 

Well for one...Greddy is imported and GTM is not. Greddy has a lot more overhead than GTM....all that aside GTM uses the BB turbo's by Garrett which are widely accepted as the best.....Performance wise I will leave that for the people that have them to talk on it.

 

Include the intercooler in the Greddy kit...

Import Parts Pro:
Greddy Kit - $5685
Intercooler - $1560
----------------------
Total - $7245

GT Motorsports website:
GTM TT Kit - $6810

Looks like the difference is only - $435

Don't forget that Greddy was one of the first TT applications for the VQ. They spent more money on the development of the components than GTM. If you look at the kits produced by shops (GTM, AAM) you will see parts that look very similar to parts from the major manufacturers (Greddy, APS) IMO. The upside is that the shop kits are able to take what is considered the best parts of several different kits and put them in one package.

 

+1 on this mike

The GTM 28R kit which is the same turbos are the APS kit is only $5675.00 not 6800 has stated above 6100 for a different housing. So that kit is the one that would be equivalent to the Greddy kit. So its between a 1500-1100 savings.

 

GTM kit, u will get much much more than Greddy kit

ball bering turbos over jernel bering ,water cooled vs no water cooled,bar and plate vs tube n fin intercooler ,bigger piping and down pipes, Cold air intakes. BOV.

allso dont forget ball bering turbos has alot to do with the spooling of the turbo.

much better manifolds !! Better Design and more.

allso mooooooooooooooore pooooooooooower

u can go for STG 3, 4, 5, from GT30s 63 A/R 900hp to a GT30R 86 A/R 1000 whp and for the super STG 5 GT35 wheel with a T04E compressor housing.

u can go big any time u want !!! not like the Greddy ull be stuck with a 20Gs !!! and the same old piping !!!

 

gtm has a 1000 whp car?



EDIT:.........do they have a 900 whp car?

 

they did 800whp+ with the APS extreme.http://www.airpowersystems.com/350z/...s-09/index.htm

the APS extreme is using a GT30s internals with a GT28 compressor housing.

the turbo was the limiting factor.

so with the GTM STG 3 900whp is not a problem for them

they use a real Garrett GT30s

if u wana tell me thats with an APS kit, ill tell u check both kis and ull find that GTM kit is better Designd allso dont forget they Design it after they did the 845whp on APS kit.

how is that with a 11psi ???

how about if they use 110 octen and run like 26psi of boost ???

 

You totally missed the sarcasm of go-fast's post. He knows about all of the that.

 

XKR!

 

I'm offering a very good deal on my Greddy TD05H-18G Twin Turbo System
kit right now. I want to build a custom turbo system.

-approximately 1000 miles on the Greddy TT kit (the first 500 were a very easy break-in where I mostly stayed out of boost).

-Includes Greddy Intercooler, Greddy E-Manage, and the rest of the kit components.

Extras that are included:

-The Exhaust Manifolds are Ceramic coated inside and out with techline coating (I paid $200 for this)

-The turbo Housings are Ceramic coated inside and out with techline coating (I paid $90 for this)

-Turbo Blankets (I paid $250 for these)

-750 cc Fuel Injectors (in lieu of the standard 440 cc fuel injectors). (I paid $598 for these)

-Custom 3” Downpipes with SGP wastegate relocation kit, both ceramic coated inside and out with techline coating. The dumps are routed back into the downpipes, which keeps the sound level nice, but reasonable.

The techline coating reduces the engine bay temperatures quite a bit (I have been told by 25%) and is supposed to help spool the turbos faster. I have not put it back together since I had the ceramic applied, so I am going off of what I have been told.

I'll sell the Greddy kit without the downpipes/SGP wastegate relocation kit for $4900.

I'll sell the Greddy kit with the downpipes/SGP wastegate relocation kit for $5600.

Using the Greddy TT kit and downpipes/WG relocation kit, and some other modifications, I put down 609 RWHP on a mustang dyno with 93 octane (uncorrected for temp/humidity). With temp/humidity correction, it was 603 RWHP. This was with fairly conservative timing.


I also have an APS 2.5" True Dual Exhaust (nearly brand new - installed, but removed from car before the car was ever started). $825. One note, the APS 2.5" True Dual Exhaust is setup for the G35. I will check to see what is necessary for it to fit a 350Z.

 

haha lol
both kits r proven...if ur not wanting a ton power i would say greddy since the kit maxes out around 650rwhp.....and u can sell the injectors/ecu...

 

well

it was a great chance for me to say all this about GTM and the Experience with the APS kit.

GTM realy made a great kit, much better Quality then APS and GREDDY.

in the end, all this is going to help the guy who askd this Question.

 

Yeah, it was only a matter of time before Mad Mike was gonna go for 4 digits.

 

The Greddy should be good to about 750 hp. I reached over 600 with conservative timing on 93 octane and 17.5 psi of boost. There is a lot of hp left to be had once you throw in meth, more boost, and advance the timing. At 600+ hp, my timing was backed off 3 degrees from the first sign of pinging. If my Greddy kit does not sell within the next week or two, I'm throwing it back in and I'm confident I'll reach 750 hp with it when I activate the meth system, crank up the boost, and Roger generates a new map for the meth injection setup.

Also, the Greddy's spool up faster than the GT30 turbos. All of these are GTM builds measured on their dyno:

https://my350z.com/forum/shop-builds...tt-13-psi.html

https://my350z.com/forum/shop-builds...hp-22-psi.html

https://my350z.com/forum/shop-builds...cams-vpro.html

 

Here is mine on a musting dyno (609 hp UNcorrected). The dip around 4200 rpm is where we intentionally left it a little rich for a nice safety margin since I was to be running Homestead the next day.

 

Not yet, but we are wrapping one up here shortly

 

Are you sure you wouldn't rather save ~$1,500 and get better components? Not to mention faster spool

What could you sell the injectors and EMS for anyway? Maybe 600-700.

Just my bias input

-George
GT Motorsports

 

are you comparing the 18Gs with the GT30 ????

 

Hi George,

I mean no disrespect, but even your dyno charts (which I posted links to above) are showing that the Greddy spools faster, by about 500 rpm. My chart also confirms this, but was performed on a different dyno.

I'm just trying to keep the information posted herein accurate.

Now, the Greddy build in the link does have your 4.2 L stroker kit, which might make a difference, but mine is on a 3.5L motor.

 

Mine are 18Gs. I'm not sure about the GTM Greddy build. Maybe George can let us know.