Stillen claims 18whp from their catback. Stillen Website

Berk Technology claims 19whp from their high flow cats.





So if you install both on ricer math tells us that you will get 38whp right? Well that is exactly what happened for one lucky owner.





















Unfortunately there is no baseline from this car. There also happened to be a 100% stock 370Z that put out 254whp, which is right in line with other stock dynos. 370Z Baseline Dyno

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Results without a baseline are meaningless.

Still pretty impressive for just a catback and hfc. I'm sure there will be other dynos with this kind of setup, but this looks much more promising than the Z33.

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Dan Baldwin Wrote:
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> Results without a baseline are meaningless.


If you check over the actual 370z website this came from you would know that the guy did get a base line. The OP here just didn't post everything. I've been following this guys mods since he started talking about them. He was very skeptical and was even challenging some of the vendors for these products as to their claims. Turns out he was wrong and the products do work. Same for the Stillen G3 intakes. Everyone was very skeptical of those but another 370z owner tested those and got great gains. These 370z's are responding very well to mods, something the 350z owners didn't get.

Quote:

280z/300zx
If you check over the actual 370z website this came from you would know that the guy did get a base line. The OP here just didn't post everything.

I think you're mistaken.

Quote:

Semtex Post 67
Mike (bullitt5897) and I met up with Sharif over at Forged Performance yesterday and did some dyno runs on his Dyno Dynamics dyno. For those of you unfamiliar with Dyno Dynamics, it is often referred to as the 'heartbreaker' dyno, because its numbers come in lower then even Mustang dynos! Anyway, Mike's 370Z is still bone stock, whereas I've already put the Stillen exhaust and Berk HFCs on mine, as you all know. Other than that, our cars are identical -- Touring w/Sport Pkg., 6MT transmissions. Mike's bone stock Z pulled 254 WHP, and mine came in at 291.7 WHP! Now, I never did a baseline dyno when my car was still bone stock, so you have to take this comparison with a grain of salt. But even if you allow for a decent margin of error, I think this shows some pretty decent gain with the Stillen/Berk combo.

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Z33Driver Wrote:
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> If you check over the actual 370z website this
> came from you would know that the guy did get a
> base line. The OP here just didn't post
> everything.
>
> I think you're mistaken.
>
> Post 67]Mike (bullitt5897) and I met up with
> Sharif over at Forged Performance yesterday and
> did some dyno runs on his Dyno Dynamics dyno. For
> those of you unfamiliar with Dyno Dynamics, it is
> often referred to as the 'heartbreaker' dyno,
> because its numbers come in lower then even
> Mustang dynos! Anyway, Mike's 370Z is still bone
> stock, whereas I've already put the Stillen
> exhaust and Berk HFCs on mine, as you all know.
> Other than that, our cars are identical -- Touring
> w/Sport Pkg., 6MT transmissions. Mike's bone stock
> Z pulled 254 WHP, and mine came in at 291.7 WHP!
> Now, I never did a baseline dyno when my car was
> still bone stock, so you have to take this
> comparison with a grain of salt. But even if you
> allow for a decent margin of error, I think this
> shows some pretty decent gain with the
> Stillen/Berk combo.


Yup, my bad, I'm thinking of a different guy over there. Either way, more than one persone has shown that these stillen intakes work

the VQ35HR responded just as well to mods. There are people running 300 plus WHP with full bolt on(intake, headers exhaust) and ecu tune on those.

IMO, "responds well to mods" (like cai and catback exhaust) just means the factory didn't do a good job extracting all the engine's potential. Wouldn't it have been better to get that extra hp included in the price of the car?

Anyway, impressively strong motor, for sure. But heavy...

A lot of people SUCK at driving. As cars in general keep getting faster and faster, it makes me happy that they are detuned from the factory a little bit. Plus, mods are fun to do. Would you honestly want an entirely unmodifiable engine in your brand new car?

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1992 NA 5spd.

I agree with you Dan.

Kinda like the Z31 when it came out. It was impressive at the time (highest powered engine to come from Japan at the time) yet still was incredibly crippled by the factory engineering. Simple bolt ons yield tons and tons of untapped power.

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1985 300ZX n/a

See my Z project

phxZ31 Wrote:
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> I agree with you Dan.
>
> Kinda like the Z31 when it came out. It was
> impressive at the time (highest powered engine to
> come from Japan at the time) yet still was
> incredibly crippled by the factory engineering.
> Simple bolt ons yield tons and tons of untapped
> power.


Maybe the Z31 turbo but the Z31 N/A does not respond to mods very much. The fact that the turbo version responds to mods means nothing since just about every turbo factory car responds to mods. It's the nature of FI. The 370z is NA and responds to mods very well just as a FI car would. Perhaps Nissan did leave room for more power but I think it's a good thing. One thing that kept me from considering a 350z was the fact that it didn't respond to mods. Eventually stock becomes boring and you want more but it's frustrating when you can't get more. The 370z seems to be promising with bolt on's which will make a lot of owners happy. Not to mention that perhaps Nissan left room so that in a couple years it can easily bump up the HP to compete with other future cars rather than being left behind or having to design something new.

Ah, the Nismo Z just proved my point

If you think the NA Z31 didn't respond well to mods, you just picked the wrong mods. No car, anywhere, should show huge increases with simple intake and exhaust mods. Cams, cylinder compression, cam timing and ignition timing, porting heads, 3 or 5-angle valve jobs... THOSE are performance mods. A freaking filter is NOT a performance mod.

Intake and exhaust systems should be considered "efficiency" mods and nothing else. And typically, the increase in efficiency is minimal as well. When they increase performance to the levels shown on the 370Z, all it shows is that the stock setup isn't efficient enough for the engine's capabilities.

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1985 300ZX n/a

See my Z project

^ Why so negative? The car is amazing stock and even better with mods.

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I didn't say it wasn't. I still want one.

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1985 300ZX n/a

See my Z project

Me too.

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phxZ31 Wrote:
-------------------------------------------------------
> If you think the NA Z31 didn't respond well to
> mods, you just picked the wrong mods. No car,
> anywhere, should show huge increases with simple
> intake and exhaust mods. Cams, cylinder
> compression, cam timing and ignition timing,
> porting heads, 3 or 5-angle valve jobs... THOSE
> are performance mods. A freaking filter is NOT a
> performance mod.
>
> Intake and exhaust systems should be considered
> "efficiency" mods and nothing else. And typically,
> the increase in efficiency is minimal as well.
> When they increase performance to the levels shown
> on the 370Z, all it shows is that the stock setup
> isn't efficient enough for the engine's
> capabilities.


I respect your view point and what you are trying to do with your Z31 but I've been following the Z31 and mods far longer than you have. I've seen guys like you come and go trying to get the most from the n/a motor only for them to eventually say screw and go turbo. Yes power can be had but not huge amounts. Hopefully you end up happier than others with your set upDid you ever think that Nissan did this on purpose to detune the 370z. Car companies do this all the time. With your thinking the Vette should come standard with 500hp because the motor can. Instead Chevy offers a regular vette and a Z06. With your thinking most cars would come with more power. Just because a motor can have more power doesn't mean the manufacturer is looking to make that much stock. I think Nissan did a good job. They gave us a car that stock is fantastic but still leaves plenty of room for the tuners. Again, I'd rather have this than what the 350z had where stock power is what you were stuck with. I mean tell me, how many people are going to take a new car and do head work on it? Not many. Most do "efficiency" mods in hopes of gaining decent power.

To each thier own I guess. You seem to prefer a car that won't yeild gains with mods while myself and many others prefer a car that will yeild gains.

"I mean tell me, how many people are going to take a new car and do head work on it? Not many. Most do "efficiency" mods in hopes of gaining decent power."

Only the ones who are serious....

Strapping a CAI and then a highflow cat on a vehicle and calling it modified is ridiculous.

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1985 300ZX n/a

See my Z project

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It is all just a matter of personal prefrence. I would rather have the N/A Z31 with ACTUAL mods over some newer Z with air filter and CAT. A fully modded Z31 is plenty for me on a daily driver. And if you ask me, having a turbo (especially an old one) is more to worry about breaking.

Just my input...I know I chimed in a little late LOL

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1985 N/A Z31 5 speed 2+2-burgundy exterior and interior.

MY Z31

"RIP ol' red she didn't make it after the wreck, she died at the scene on 8-8-08"