Cold Air Intake HP Debate - Is it worth it ?

TBOX

I'm sorry but this makes no sense to me. Are you trying to say a Honda, an American motor or a rotary are superior NA builds?

A: name a Honda motor that is superior to any other motor for making power, hondas rely on weight and high revving motors but in reality compared to any other choice are a horrible option for power.
B: point me at a rotary NA build that makes power... The wankel was and is a failure. Don't mistake the brilliance of the handling of rx7s and rx8s and their power potential.
C: you don't mean American, you mean displacement (which is the typical route for American muscle cars) which will always make more power on an NA build

Nikkolai

My statements are all based on after market parts and builds that have been done over the years. I am not sure about the rotary though, since all I have seen are 4 rotor builds and a naturally aspirated build done by RE Amemiya that output 400whp. I know that the Nismo 380RS is rated at 380hp naturally aspirated but I am not sure if many people go with the n/a route.

jnaut

honda s2000k over 100hp per liter n/a . nissan cant touch this. period

__________________
Best 1/4 mile 12.24 Best mph 114.5_______

TBOX

Yes hp/liter s2000 and even them rotary potaoes are some of the top contenders, but I wouldnt consider them the top NA cars. No matter, we're derailing.

BLM

Actually, with an exhaust swap and a tune you'd be pretty close to 370 bhp and though the 120 HP/liter is impressive on the s2k you sacrifice a lot in terms of low-mid range power with a high revving motor like that.

__________________
K&N // GTM // BERK

Jordo!

Yep. A fully bolted on tuned Z will definitely be there at the crank, espcially if we use ps units, which are a few % higher than hp units.

VVEL tuning, I predict, will be the key to really getting a NA motor to wake up tho'.

__________________
Enjoy it. Destroy it.

Nissanboy

Its still slow

henry0844

lol

jnaut

Actually that 2.0 sr20ve is a good motor, I just did a swap at my sbhop into a 99 sentre se.

__________________
Best 1/4 mile 12.24 Best mph 114.5_______

BalanBro

Did Nissan buy the rights for the variable lift from Honda? I was studying these motors a few years back, and it was a blatant copy of VTEC.

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

henry0844

both of those motors had vvel like our z. vvel is much more technically advanced than vtech. vvel has no intake cam and is computer controlled.

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.

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

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.

__________________
7AT Track Car!
Journal thread / Car setup details

Red__Zed

With a decent driver, they will leave a Z around most tight road courses.

Limeybastard

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