2 those with the Stillen Hi-flow intake ...

Reply Subscribe

Thread Tools

Search this Thread

04-29-2001, 08:11 PM

ohboiya

Supporting Maxima.org Member

Thread Starter

iTrader: (3)

Join Date: Sep 2000

Posts: 5,028

Did u guys reset your ECU?

I initially didn't & felt that there was no improvement over the stock intake ... in fact .. I thought there was a very noticeable deterioration of low-end torque & only minimal gains in hi-end

well .. 2nite I reset my ECU & took the car out 4 a spin ... maybe it's purely psychological .. but my butt dyno says there is a significant improvement from before resetting my ecu ...

However, I can't really tell if it's better than stock ... but dyno's that have been published b4 state that it is ...

The sound alone makes it worth it

If u haven't reset your ECU after installation .. u mite want 2 consider it ... all u do is disconnect the battery for an hour ...

04-29-2001, 09:23 PM

LoveSick

Senior Member

Join Date: Mar 2001

Posts: 1,142

Quote:

Originally posted by ohboiya
Did u guys reset your ECU?

I initially didn't & felt that there was no improvement over the stock intake ... in fact .. I thought there was a very noticeable deterioration of low-end torque & only minimal gains in hi-end

well .. 2nite I reset my ECU & took the car out 4 a spin ... maybe it's purely psychological .. but my butt dyno says there is a significant improvement from before resetting my ecu ...

However, I can't really tell if it's better than stock ... but dyno's that have been published b4 state that it is ...

The sound alone makes it worth it

If u haven't reset your ECU after installation .. u mite want 2 consider it ... all u do is disconnect the battery for an hour ...

After cleaning my filter, oil change and stuff, I just reset it. Will try it out tomorrow morning!

04-29-2001, 09:59 PM

ohboiya

Supporting Maxima.org Member

Thread Starter

iTrader: (3)

Join Date: Sep 2000

Posts: 5,028

Quote:

Originally posted by LoveSick

After cleaning my filter, oil change and stuff, I just reset it. Will try it out tomorrow morning!

Kewl ... then u can confirm what I said ... or tell me that I'm talking outta my a$$

04-30-2001, 06:52 AM

ohboiya

Supporting Maxima.org Member

Thread Starter

iTrader: (3)

Join Date: Sep 2000

Posts: 5,028

Quote:

Originally posted by yo_its_ok
Butt dyno...LoL...
anyhow air intakes don't make HP, but they provide something that people mistake for HP, and that is acceleration.
RPMs climbing quicker obviously you'll feel as tho you've gained some "power."
Lots of gimmicks out there, seat of the pants driving or a dyno-nut.

-Just Drive Dammit.

then r Stillen's claims of 6-8 hp false? & r the dyno's people have had all wrong?

regardless .. the sound is kewl

04-30-2001, 09:03 AM

tb420

Member

Join Date: Aug 2000

Posts: 97

i'll give it a try, but....

do our stereos have a code lock out number that we have to enter when re-connecting the battery? (base level lame-a$$ amfm casette stereo in my car)

04-30-2001, 09:33 AM

Paul6speed

Senior Member

Join Date: Aug 2000

Posts: 1,915

Can you clarify what you mean by this? I dyno'd 6 HP higher with a cone intake on.

Quote:

04-30-2001, 02:11 PM

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

Quote:

This is funny... but WRONG! The butt-dyno refers to the feeling of acceleration you have in your car. In otherwords it is the feeling of being pushed back in your seat. This DIRECTLY coorelates to the amount of torque you are putting down to the road. Also keep in mind the relationship between torque and HP, namely HP = Torque x RPM / 5252. These are facts... ie non-disputable (Ever notice that ALL dyno runs cross at 5252rpm???). If you feel you are being pushed back in your seat harder, then you are making more torque, which means you are making more HP! End of story.

04-30-2001, 04:05 PM

jashick

Senior Member

Join Date: Jan 2001

Posts: 216

Re: i'll give it a try, but....

Quote:

Originally posted by tb420
do our stereos have a code lock out number that we have to enter when re-connecting the battery? (base level lame-a$$ amfm casette stereo in my car)

I pulled the stereo out (disconnected all harnesses) and put it back in. Worked without punching in any security codes.

05-01-2001, 06:06 AM

maxedout1

Guest

Posts: n/a

Hey guys just installed the Stillen Intake and all I did was disconnect the battery as I worked on the car. I can feel the power and damn do i love the sound of it.

05-01-2001, 07:28 AM

#10

mbcp_tdogg

Senior Member

Join Date: Feb 2001

Posts: 2,087

Can someone take the time to explain how the ecu works and why resetting it after certain mods is beneficial? Couldn't find anything with search. Thanks.

05-01-2001, 07:55 AM

#11

UMD_MaxSE

Got Bent?

iTrader: (1)

Join Date: Sep 2000

Posts: 11,516

Quote:

Originally posted by mbcp_tdogg
Can someone take the time to explain how the ecu works and why resetting it after certain mods is beneficial? Couldn't find anything with search. Thanks.

The ECU is adaptive to a certain extent. Thus, things like an increase in airflow in and out of the engine will cause the ECU to adjust the engine's running parameters. When you add mods like an intake or y-pipe, you will have more airflow. Resetting the ECU in essence, 'deletes' the old settings it had stored before the mods. After a reset, it will measure the engine parameters again and adjust better then it would without a reset.

05-01-2001, 08:00 AM

#12

mbcp_tdogg

Senior Member

Join Date: Feb 2001

Posts: 2,087

Thanks UMD.

Sigh, ignorance is bliss. The more I learn, the more I want to add on.

Quote:

Originally posted by UMD_MaxSE

The ECU is adaptive to a certain extent. Thus, things like an increase in airflow in and out of the engine will cause the ECU to adjust the engine's running parameters. When you add mods like an intake or y-pipe, you will have more airflow. Resetting the ECU in essence, 'deletes' the old settings it had stored before the mods. After a reset, it will measure the engine parameters again and adjust better then it would without a reset.

05-01-2001, 12:27 PM

#13

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

Quote:

Originally posted by yo_its_ok

One rebuttal. My Accord laid down 242hp @ wheels w/ heavily modded H22 motor. However I laid down a mid 13s 1/4 mile time. First time at the track, after 5000 miles of breakin in, and street racing. Someone thought I was juicing, so I had to show them no juice, no cheater 5lbs tanks.
The secret of that acceleration is in how quick my rpms climbed. Of course off the line you get torque to get you started, but when the rpms started climbing with a vengence, and on the VTEC cams from 3200 instead of 4800 all the way to 7800 redline, thats freakin fierce acceleration. On the street, you feel it, but at the track it was proven.

So, what are you saying here? Obviously "how quick your rpms climb" is acceleration by definition (change in velocity with respect to time)!

Quote:

]Originally posted by yo_its_ok

Wow a feeling, a vector force pushing against you, what does that prove ? Higher velocity, yes. That's it.
You can say that is HP or Tq, however, you think about it then. You go to a dyno, and see minimal gain in hp or tq, you ask why ? The engine sucking in air makes anyones blood pump, and the butt dyno experiences something its never have before. The RPMs are climbing quicker to reach the power, but at the same time, it builds up so nicely, it plants your butt in your seat, and it feels great.
As for your End of Story remark....It ain't over baby...
:

This is the whole premise of a butt-dyno! It's what you feel while in the car. The most accurate judge of power, it isn't. In fact, it has nothing to do with velocity as you state, but the feeling of acceleration. I agree that the butt-dyno is affected by other items like sounds that you haven't heard before. People often put on a cat-back and claim their car is faster... look at all of the ricey Hondas buzzing all over town. They are just as slow as they were before but they "feel" faster. This is one problem with trusting your senses when it comes to gains from mods. So we agree on this, but...

Let me ask two questions:

1. How do racers calculate their optimum shift points?

They do it by calculating the torque at the road (factoring in all gearing). You always want to maximize your torque applied to the road. This provides the best acceleration.

2. When you punch your car at 2500 rpm, where does your car feel like it's accelerating the hardest?

I guarantee you that it is much closer to your torque peak of 3700 than it is to your HP peak of 6600. Just about everyone on this board will agree that their car doesn't pull as hard near redline.

Basically if you are accelerating harder, you are making more torque (which means more HP because I'll state it again: HP = torque * rpm / 5252).

05-01-2001, 12:39 PM

#14

hawkdog

Senior Member

Join Date: Sep 2000

Posts: 446

why didn't someone tell me this!!

I have an intake and a y-pipe and I never have heard a thing about resetting the ECU....I'll do it today and see what happens. Also, why does it take an hour to reset? I would think it would do it instantly....

05-01-2001, 05:56 PM

#15

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

Quote:

Originally posted by yo_its_ok
Desert Pearl, oi man...it's an intake we are talking about. Do you honestly think its Tq or hp the filter makes, and thats why the car feels faster ?

Well, yes I do. If you have an air filter on your desk and you remove it and put a different filter on your desk, then there is no HP or torque improvement. If you put them on a friggin' motor, yes there is a HP and torque difference.

Quote:

Originally posted by yo_its_ok

Its like you went on a totally different tangent with throwing formulas, and so forth.

I only threw out one formula to help make it clear that HP and torque are related... and here it is again just to spite you!

HP = torque * rpm / 5252

Quote:

Originally posted by yo_its_ok

Geez. Well anyhow, butt dyno or not, all it is doing is just climbing quicker to propel the car, and your idea of its creating more torque, simply, if it gets to that fat part of the power band faster, then, you feel as tho you have gained power. Acceleration times have decreased, but your power has gained marginally.
Thats all I'm saying.

My point is this: If a car is reving faster, then it is accelerating faster (unless your tires are spinning, clutch is slipping, etc). If it is accelerating faster, then you are making more torque over that rpm range than you were before. And finally, for a given rpm, an increase in torque means an increase in HP. THUS, IF YOUR CAR IS REVVING FASTER, THEN YOU ARE MAKING MORE POWER!

05-01-2001, 06:42 PM

#16

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

One more thing...

Quote:

Originally posted by yo_its_ok

BTW my peak torque on my H22 was 202lbs-ft @ 6900.
peak hp @ 7100 just before 7800 redline.

Was this the same car that you said had a peak HP of 242? If so, you should check your dyno numbers again, because something is wrong.

202ft-lbs at 6900rpm equals 265hp, which is more than the peak HP you claimed earlier.

05-02-2001, 01:25 PM

#17

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

Quote:

Originally posted by yo_its_ok

As for the actual #'s vs your formula #'s prove it on a Maxima, then talk to me about it.

Dude, I can't believe you are questioning this formula. If you do a search for "horsepower, torque, 5252, formula" on any search engine, you'll find multiple sites documenting this formula. Please read the following link because it explains where the formula came from and why it's true. It also goes over just about everything I have said in my previous posts in this thread.

http://www.g-speed.com/pbh/torque-and-hp.html

As far as actual numbers go, here are the results from my last Maxima dyno run.

rpm / torque /actual hp/ calc hp
3000 / 158.3 / 90.4 / 90.4
3250 / 165.9 / 102.6 / 102.7
3500 / 171.2 / 114.1 / 114.1
3750 / 180.1 / 128.6 / 128.6
4000 / 179.0 / 136.4 / 136.3
4250 / 179.3 / 145.1 / 145.1
4500 / 177.9 / 152.4 / 152.4
4750 / 178.3 / 161.3 / 161.3
5000 / 172.8 / 164.5 / 164.5
5250 / 171.9 / 171.8 / 171.8
5500 / 170.1 / 178.1 / 178.1
5750 / 166.8 / 182.6 / 182.6
6000 / 162.0 / 185.1 / 185.1
6250 / 156.0 / 185.6 / 185.6
6500 / 150.5 / 186.3 / 186.3

The calculated values match the actual numbers except for rounding error. Here are numbers from my Eclipse also:

rpm / torque /actual hp/ calc hp
2250 / 84.2 / 36.1 / 36.1
2500 / 126.3 / 60.1 / 60.1
2750 / 151.1 / 79.1 / 79.1
3000 / 177.7 / 101.5 / 101.5
3250 / 207.9 / 128.7 / 128.7
3500 / 230.9 / 153.9 / 153.9
3750 / 241.9 / 172.7 / 172.7
4000 / 243.5 / 185.4 / 185.5
4250 / 247.9 / 200.6 / 200.6
4500 / 248.1 / 212.6 / 212.6
4750 / 254.4 / 230.1 / 230.1
5000 / 253.9 / 241.7 / 241.7
5250 / 250.4 / 250.3 / 250.3
5500 / 237.7 / 248.9 / 248.9
5750 / 234.1 / 256.3 / 256.3
6000 / 226.5 / 258.7 / 258.8
6250 / 210.9 / 250.9 / 251.0
6500 / 207.9 / 257.3 / 257.3
6750 / 197.0 / 253.2 / 253.2
7000 / 188.4 / 251.1 / 251.1
7250 / 178.8 / 246.9 / 246.8
7500 / 168.1 / 240.0 / 240.1
7750 / 156.3 / 230.6 / 230.6

These also match +/- rounding error. You can see that on both of these the torque and HP are almost equal at 5250rpm like I mentioned earlier.

Anyhow, please check out the link above. It explains everything and is most educational.

05-02-2001, 07:29 PM

#18

Desert Pearl

Senior Member

Join Date: Jan 2001

Posts: 308

Quote:

Originally posted by yo_its_ok
Omaeeeee....u need a better hobby

Oh believe me, if it wasn't for the good ol' Ctrl-C and Ctrl-V, I wouldn't have posted my dyno numbers.

I see you changed the pic in your sig. I kinda liked your pic of the taillight and side of your car....

05-02-2001, 07:49 PM

#19

maxse01

Senior Member

Join Date: Mar 2001

Posts: 621

I just put in my Stillen Intake today and drove around a little and didn't feel much of a difference. Then i came home and unhooked my negative battery cable for 2 hours and then drove the car. It felt a little quicker, but what i am really impressed with is the sound. IT SOUNDS SO COOL!!! Greatly anticipating my stillen y-pipe :-)

01 se 5 speed sterling mist/frost leather all options
josjua tree aluminum dash kit, F/R clears, Piaa plasma h4's and h3's. AE shift **** and sills, Stillen Intake and the Y-pipe is coming soon.

05-02-2001, 07:52 PM

#20

Y2KevSE

Rice Boy in Denial =)

iTrader: (13)

Join Date: Aug 2000

Posts: 25,357

Quote:

Originally posted by maxse01

01 se 5 speed sterling mist/frost leather all options
josjua tree aluminum dash kit, F/R clears, Piaa plasma h4's and h3's. AE shift **** and sills, Stillen Intake and the Y-pipe is coming soon.

Did you know you can put that description in your sig so you don't have to type it each time? Click on "profile" located in the upper right corner of the page.