Cold Air Intake HP Debate - Is it worth it ?

BalanBro

No, I'm pretty sure those had "Neo VVL". It didn't have fully variable control of the intake valve. Instead it had an adjacent "aggressive" cam lobe which used oil pressre to engage the aggresive cam follower at a set RPM. Just like Honda's system. Still not sure how they got around the patents.

VVEL didn't come along til much later.

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2012 Mercedes C63 AMG P31 Sedan, ROW, aFe, Eurocharged Dyno Tune. 438WHP/415WTQ
2010 SOLD: 40th Anniversary 370z

jnaut

neo vvl , exactly!

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Best 1/4 mile 12.24 Best mph 114.5_______

Da.Menace

+1

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Brembo :: H&R :: KW :: SPC :: Stillen

Fern to the Z

Haven't heard anybody mention the K&N 69-Series Typhoon Short Ram Intakes? has anybody out there tried them, any significant difference in HP and tQ than stock or vs. HPS MAF tubes with K&N drop ins?

Fern to the Z

FL 4Motion

for what it's worth, I remember seeing someone on this board claiming that with the K&N short ram they netted about 6 whp on a dyno but I can't remember who said that. That's basically what you can expect to get from drop ins and the tubes so i'd save the money and go with the latter.

Fern to the Z

Awesome,
I'll go with the HPS and drop ins, thank FL, Now I just hope their in stock, reading in the other thread that people have been having problem stocking them because of the demand.
I dont mind waiting, I have to wait for my FI TDX CBE for a while too. cant wait until that one gets here.

Fern to the Z

zellsexy

evo - 145.5hp per liter =p

wstar

The G3-vs-dropin thing is mostly arguing about pointless tiny effects. Getting a valid dyno comparison on a 10hp or less difference on this engine is bound to run into accuracy and repeatability issues. I bet I can go to the same dyno shop two days in a row without changing a thing on my car and get at *least* a 5hp difference, especially if the dyno's not maintained and operated perfectly, or there's any slight change in the weather, or more traffic on the way to the shop, etc.

Perhaps more importantly with intake mods: the dyno doesn't accurately reflect real driving conditions. On a dyno you're measuring how effective your intake is when the car's pulling through the 100mph+ range, with only a 20mph headwind coming in from a fan (with probably lower CFM than the car would get even rolling at 20mph), too much heat building up everywhere, totally different airflow effects happening all over, etc. Could be a completely different story when you're actually at 100mph, with a 100mph wind coming in the front of the car (and everywhere else), different airflow patterns, etc.

Also:

Our engines do, in fact, have intake cams. VVEL just uses a crazy system of eccentric orbiting stuff to dynamically alter the lift/duration by moving the intake cam as it's spinning, so to speak.

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7AT Track Car!
Journal thread / Car setup details

ZBro16

Went through this thread and tried so hard to figure out how we went from "the power difference made from SRI to CAI on the 370Z" to "VTEC BRO" and couldn't draw a single line between the two.

Limeybastard

Me old 1997 BMW M3 with the euro S50B32 engine delivered over 100hp per litre also. It was a 3.2 litre unit.

ANMVQ

I'll have info on this tomorrow , I have ZI tubes, Drop ins and a custom cold air feeding the stock boxes from the radiator support. I have a dyno tomorrow am .
Also HFC's and catback and 3rd revision of my Etuene, I'll have logs of my tune also. The whole project cost me $200. An only that much because I bought CF Saleen brake ducts for the air scoops

Attached Images

Custom intake_jpg3.jpg (110.3 KB, 38 views)

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

Z eliminator

I dynode my Stillen G3 before and after.
it was the only bolt on the car. base line was 264, with the intake 284 rwhp SAE.
did it with out tuning the car.

Z

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12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

ANMVQ

My APT just got changed to the follow Saturday , :/ Nov 1 sorry

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

ANMVQ

I got one run in on the HW 3rd gear , Do you know what the MAFgm readings are for the GEN 3's from 2500-7k. Looking to compare them. Mine started at 11.63 and jumped to 121.9 by 3k and topped out at 268. )@ 5984.( max I think as nothing higher as it stayed there all the way till redline . Not sure how these compare.

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

jrb55gh

The data logs on my Ecutec tuned completely stock 2013 z show the 121g/s at 3200 rpm and peak 268 g/s at 6200 rpm to redline. It appears that your intake mods allow more air flow at a given rpm until the max limit is reached at 268 g/s.

I would bet that the 268g/s peak flow would increase if you added high flow cats and/or catback exhaust.

Whoops, I see you do have Hi flow cats. Scratch the previous statement. Has anyone else seen a g/sec greater than 268 on their data logs?