Reach out to btwtuning.com they are in AZ now.

Awesome, thanks!!

Thats because the forums are dying. The mods are barely active. Just take a look at the dumbass tags in this thread near the bottom of the page. I have had them clean it up about 6 times and its pointless as they just delete them and do nothing about it after that.

Z1 just released their rotrex supercharger kit and although the fit and finish looks amazing, I can't really comment on their numbers. At 10psi they require E85 to push 395wtq, the Topgunz kit can easily push 450wtq at 10 psi on 91/93 fuel. The Topgunz kit is superior in that regard, I'm not sure if they were more conservative to get it CARB approved in the future but it seems to be track tested so cooling appears to be dialed in.

https://www.z1motorsports.com/superc...b44c1df4d30a20

Z1 and SOHO are just copy cats. End of story.

It's no debate that Topgun has been ahead of the game for quite a while, while other companies with bigger marketing teams and budgets were able to reap the benefits. I think that if Topgun had better marketing of its products with some revisions to its fit and finish it would definitely be more recognized and appeal to more people.

That's one reason I don't post anything anymore. Can't steal it if you can't see it.

Consumers benefit in a competitive market.

This might be due to the fact that Topgunz kit can use a smaller pulley to get boost down low, then bleed off extra boost at high RPM. Z1 kit has a normal Turbosmart BOV so it can’t do that


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what's stopping you from putting a solenoid in between manifold and turbosmart BOV to bleed off actuating pressure....

(or do you mean it just doesn't come setup like that out of the box?)

Yea exactly, it just comes with a normal BOV out of the box. Switch to a controlled BOV like Topgunz kit and I imagine the power would be very similar.


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the BOV doesn't need to be changed. just need to add a solenoid in line (pretty sure)

EDIT:
i think i'm wrong lol
topgun kit must use a wastegate as a BOV with top and bottom pressure fittings...right?
vs z1 using a BOV that generally only has a top fitting for vacuum reference.

In a short-sighted sense, consumers do benefit from the race-to-the-bottom pricing that is sparked by copy cats like Z1... but it is not the sort of competition you are thinking of.

It isn't like they are bringing competition in regards to development and progress to the platform. They are merely providing mildly reinterpreted versions of products you already had access to. They have contributed virtually nothing as far as performance achievements, problem solving, or innovation. Especially when you consider the scale of that company and their resources.

Compare them to businesses of a similar scale that specialize in other platforms such as Supras or GTRs or etc, and Z1 suddenly looks pretty weak sauce. With every other platform, the big heavy hitters are dropping innovation left and right; new/unique power adders, highly engineered intake manifolds, engine programs that solve problems, drivetrain engineering, etc etc. Meanwhile over here we have Z1, 20 years in on the VQ and they are releasing catback exhausts, cold air intakes, strut tower bars, cheap chinese coilovers, and copying anything they can get their hands on from small businesses. :icon17:

Yup, Mr. Squeeze and I have been talking about this for over a year. The same players have moved from the 350z, to the 370z and now to the new Z doing the same old thing. They will innovate to a point and then throw their hands in the air. Vinney Ten came back on the scene and ran a 8.65 in the quarter mile in his 350z this last week. Where are all the big players in the Z community? Selling/doing the same old thing.