Stillen kick at 4k rpm's because loss of torque?
 

Stillen HIGH FLOW INTAKE

People say there is a kick of power at 4,000 rpms with the stillen.

Is this because the low end torque is killed making it seem that there is a power increase?

On a stock car there is more low end TQ so the kick seems less pronounced at 4k but the car is actually faster than with the Stillen.

Anyone run your car in the 1/4 stock then with the Stillen without any other mods?ac

Stillen Intake, Stillen headers? Stillen what?

People will say almost anything with out specifying what it is or how their results were obtained. Most all aftermarket intakes, exhausts, cats, headers, plenums, spacers increase intake air and exhaust gas flow. To quote a good friend of mine, "If the fuel doesn't keep up, you'll lose power".;)

check out this thread: https://g35driver.com/forums/reviews/73734-dyno-d-stillen-hi-flow-airbox.html
although I saw another dyno that said the stillen performs better than STOCK and comparable to an INJEN cAI, this dyno shows that stillen does not perform that much better than K&N drop in

That is an excellent and valid observation. It is quite common for some modifications to produce a "kick" in power in the upper rpms, but in reality the power in the lower rpms is worse than stock. This kick is quite common on intakes because all of the aftermarket setups get rid of the sealed design of the OEM intake tract. Remove this component from the intake can make lower rpm and off idle throttle response feel somewhat weak and a bit flat. Once the rpms get higher, the airflow becomes more laminer and the lost power/response is restored and the engine wakes up with a kick in power. On the dyno, it's hard to see this reduction in lower rpm power because a dyno run uses WOT the entire run, not part throttle.

Most people with aftermarket intakes won't notice this lack of low rpm power and throttle response because:

1) The additional intake noise gives impression of going faster
2) They get caught up in the excitement of the mod
3) The lack of low end power and response is pretty minimal

The only way they'd know there was a difference is if they put their OEM intake back on. In many of the cases I've read of people doing this, the response is the OEM intake has better low end feel and throttle response, but is much quieter above 4,000rpms.

Best of both worlds... get a Nissan Z-Tube and a K&N filter...

+1 . . . That would be the prudent choice.

Maybe I will and head back to the drags at Moroso to see if there is a difference.

Generally since MPG is critical to reduce the tax payments to government per car produced you will find the oem intake system optimized to try to gain every 0.0001 mpg at what ever rpm 55-61 mph would require.

Getting over a 22.4998 hump means they could call 24.50001 mpg =25 mpg a significant savings in taxes......reducing the selling price of the car!

These miniscule improvements go away when you redesign the engine's intake system prior to the MAF.

Ok, here's my ideas.............
 

Not all mods will show great gains alone....the Stillen
CAI combined with Z-Tube may not show any hp...
but add the MotorDyne 1/2" spacer and a great
cat-back exhaust system and you've got a kicker!
All these mods combined togeather will make a
diffrence in R/HP as well as sound!

When did you personally test this product? How did you test the difference? Where are the dyno charts and track results that confirm your statements? Is this more unproven B.S. like you're known for?

Have you tested this setup on the track and dyno?

Why do I have to personnally test this product when the all the dynos show the Stillen intake doing basically nothing? Why would I have to spend $200 to show what others are reporting? As for the tested difference, there have been many people that have reported reduced low throttle response and low rpm power with the Stillen intake and other POP setups. This coincides with just about every other late model car that runs a similiar intake. The OEM intake is designed for optimal flow while keeping the air flow laminer through the intake tract and across the MAF. At speed, the OEM intake becomes slightly pressurized (sealed system) which greatly improves low and part-throttle response. My personal experience (dyno and track, personal and friend's cars) with aftermarket intakes on VQ30s and VQ35s is the stock intake are pretty much an ideal setup. The G and 350Z intake tract is about as good as it gets with minimal bends, a straight on design, and large induction ports.

Believe what you want. I'd love to see someone actually do an honest before and after at the test of the Stillen intake at the track. IMO, since the Stillen intake shows anywhere from 0-4whp gains at various parts along the power curve, I'd expect the results to be within hundreths of a second and tenths of MPH which is in line with what most of us see on back to back passes with no change to the car. I'd love to have someone prove me wrong, but seeing that so many people in here don't go to the track, I guess we'll never know.

Dave,

I'm with you.

There was the same discussion going on at the Corvette forum regarding the Vortex induction for my C6.

The manufacture guaranteed 3 tenths and 3 mph or your money back.

My car went from repeated 13.0’s to repeated 12.7s and some 12.6's with JUST the new airbox.

No one believed that JUST an intake could give me such power. So, I went to Moroso and ran the tests back to back the same night. I actually proved that the intake DID work. In the real world at the track.

I was so sick of dyno talk and the like.

Now I don't know if these intakes work for our cars or not. I am willing to test them like I did my C6.

On the Corvette I was willing to loose a little of the low end since I already had plenty. BUT, on the G it already feels anemic so I'm no willing to loose any at all.

I'm pretty sure most anything feel anemic when you're comparing it to the LS6 :D That Vortex intake is one pricey SOB, but it does work. The Vette intake tract has always been a bit restrictive. I know that an intake on my 94 Z28 netted me consistently .15 and 1.5mph faster times. The OEM setup (central pipe specifically) was intentionally restricted so as to keep the power down and keep Z28 off the C4s heals. The G/Z VQ35 intake is a far better design and is actually designed for max performance and an authoritative tone (especially with the Z-pipe). The stock airbox can easily outflow the lungs of an NA VQ35. VQ35 Maxima and Altima owners see no measureable track gains with intakes either, but a lot do it anyways because they want the sound. The VQ35 in Maxima/Altima is basically the same motor. The only real power differences come from the intake manifolds, MAF sensor, tubular manifolds (restrictive cast log-style on Maxima/Altima), intake tract (which the G/Z is far better), and obviously some ECU tuning differences.

look at any dyno sheet @ we make **** for power below 4k stock as is.