Looking for impressions of GTM or Stillen Supercharger kit 2-3 years in

Baer383

Not on this platform.

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2013 ZL1

754 rwhp 747 rwtq

olddudesrule

What are you basing this knowledge on? Not trying to be a smart ***, just want to know what it is.

elperuano

I always thought stillen was synonymous with sucking. It might be reliable in the fact that it won't make much power over stock. If that's what u mean then Yea.

Baer383

My comment was meant to be a smart azz.

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2013 ZL1

754 rwhp 747 rwtq

SS_Firehawk

Baer, I want to grab your dog's skin rolls...

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future370zzz

The Stillen kit in a sense is more reliable because it produces less torque compared to GTM's kit but if you want CARB legality then Stillen is the only option for now. GTM has applied for CARB on their GTX turbo kit and are claiming that they will eventually try to get CARB for their Stage 0 SC kit but CARB is tough to get.

The Stillen kit is not as efficient as the current GTM's SC kit. When GTM's SC kit initially came out it produced only about 410 whp on 91 OCT and 8spi but they have modified it through out the years to produce more power.

SC setups are pretty reliable if installed properly, just need to check the belts and tensioners once in a while. Have not heard of any tensioner assembly issues, this is where headaches could occur with belt slippage and belts walking off the pulleys and tearing things apart.

So Stillen if you want CARB but will sacrifice total power potential (420-440whp average with kit; extreme modification to kit up to 480whp, see Motionlab threads) versus GTM that does not have CARB but proven to produce 500+whp power or as much psi as your block can handle or dare. And with the coming of ECUtek and UPrev VVEL tuning we'll see how much we can get from these SC kits.

My opinion is that Stillen produced a CARB approved kit and just said OK, we're done, whereas GTM continued to tinker with their kit to be more efficient and powerful.

SS_Firehawk

No CARB when you have to tune the Stillen kit to not kill your car. CARB for that kit isn't really what it is. That's why it consistently sucks. It doesn't make bad power with some supporting mods and a good tune, but GTM really has opened up some great options for supercharging and left Stillen so far behind it's not even competitive.

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SPOHN

If that's the case stay NA.

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future370zzz

From talking to Stillen, they are allowed to "update" their canned CARB tune so I would think they have tuned out all of the bugs. The confidence is not there right now with their tunes.

The CARB placard will come installed on the blower, whatever you do afterwords is on you. So you could theoretically get Stillen and CARB and then do a custom tune, impeller upgrade and smaller pulley to push 10psi and try to get 460-470whp and then return to "stock" Stillen CARB kit when needed. Plus CA is supposedly implementing a not rolling emission test, just uses the OBDII scanner link to check the computer for mods. We will see.

future370zzz

Yeah, you don't get as much as GTM's kit's but a +130whp and +80wtrq bump is nothing to sneeze at if you're just coming from NA. After a few months though it will be a different story. That is the limitation of Stillen's kit. If you want to expand your HP/TQ goals, GTM will deliver.

elperuano

How much are the stillen kits?

Pro4Jackster

I just got my Stillen VQ35HR Tuner S/C for $5200. Made 140HP/70TQ over my bolt-on N/A tune. Same dyno. Same conditions. Biggest pulley they sell (3.125"), water/meth injection, and custom tune.

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Jtranbuilt '08 Z [Jtran PT7075 Single - Fujitsubo - Transgo - Wilwood - TE37SL - BC Racing]

Baer383

Thats good for a 350z but the op has a 370z.

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2013 ZL1

754 rwhp 747 rwtq

Pro4Jackster

Same kit buckaroo.

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Jtranbuilt '08 Z [Jtran PT7075 Single - Fujitsubo - Transgo - Wilwood - TE37SL - BC Racing]

tsui_san

I thought the Stillen kit was going for $6300. How'd you get that price?