Dyno again. F5air.

[staticorex]

Well since my first dyno, stock, two weeks ago, I've installed a Fujita CAI. So why not? I got it dyno'd again.

About 5-7 pulls with the fog cap on and 4-5 with it off. A couple runs after pulling the battery for 30+ min to try and reset the ECU.

Results: Nothing. In fact a power loss on most of the pulls. It's running leaner now though. So more gas millage.

All in all I'm happy with it. A nice cosmetic upgrade and the sound is incredible for a 1.5l. I can't get over how nice it sounds compared to my other car- a 2.5l- and my friends' cars with the same intake. But hp gains? Well I wasn't expecting much from it anyway.

Just wondering where the 4whp is the F5 got. :)


Okay: edited per request. The second dyno run. I only printed the lowest and highest for comparison.








Here is the link to the first run, stock.
http://www.yarisworld.com/forums/showthread.php?t=6338

[YarisGuy]

There are a few things to keep in mind when dyno testing.

1. Before and after dynos should be done on the same day to keep the weather and humidity in check. Doing a dyno today and then going back in a couple weeks will change these conditions and can lead to inacurrate readings.

2. How does your area under the curve look? You should plot the before and after lines on the same page to look at the area under the curve. Peak numbers are over rated and don't mean as much as the behavior of the power and torque curve.

3. Did you use the same dyno? Was this dyno recalibrated or were the settings changed in any way during the two weeks that you were away? These can also change the readings.

4. etc. etc. etc.


.

[Motorhead6T5]

Please post the new one.

[ChinoCharles]

Originally Posted by YarisGuy

There are a few things to keep in mind when dyno testing.

1. Before and after dynos should be done on the same day to keep the weather and humidity in check. Doing a dyno today and then going back in a couple weeks will change these conditions and can lead to inacurrate readings.

2. How does your area under the curve look? You should plot the before and after lines on the same page to look at the area under the curve. Peak numbers are over rated and don't mean as much as the behavior of the power and torque curve.

3. Did you use the same dyno? Was this dyno recalibrated or were the settings changed in any way during the two weeks that you were away? These can also change the readings.

4. etc. etc. etc.


.

Almost all dynos will automatically correct results based on weather conditions to ensure that results are accurate despite being taken on different days. You are right, though... the area under the curve will tell you if you have a faster car or not.

[staticorex]

All valid points Yarisguy. I realize the difference of hum/temp will affect it. Same dyno, wasn't modified. about 10 degrees cooler that day. I'll get the new one scanned in a bit.

UP THERE. :)

[reznunt]

Originally Posted by ChinoCharles

Almost all dynos will automatically correct results based on weather conditions to ensure that results are accurate despite being taken on different days. You are right, though... the area under the curve will tell you if you have a faster car or not.

i'd still rather do a run, install the intake, and run it again twenty minutes later than do it a week later and rely on computer corrections. not saying it would be inaccurate data, but it just eliminates another variable. it's good practice.

[staticorex]

Also though the ECU has to have time to adjust. Just slapping it on just makes it run leaner until it corrects.

[AlphaFox]

it looks like there are less dipps in it compared to the first one, so id say its a more constant power=faster

[Motorhead6T5]

The graph layout is a bit different. So its hard to compare the curve,one is mph one is rpm.Check out the air/fuel ratio though.

[majicmeow]

going leaner =

watch how low that AFR goes... there is only so much correction in the stock ecm... Not worth running lean IMHO, even if it gives you 1 or 2 more MPG.

Even if it is lean though, the ECM will eventually correct the AFR to as close to the stock setpoint as it possibly can, negating any milleage increase you may have gained. Also keep in mind, that if you have a cool or cold morning and the ECM calls for more fuel because of the denser air, you wont be getting it = even more lean = burned pistons!!!

Just my 2¢

-Aaron

[Motorhead6T5]

If you notice the graph actualy shows a richer A/F. The smaller the number the richer. The A/F on the cold air intake run is actualy very good. Stock is very lean. On N/A car you typicaly want it around ~12.5-13.5,on a F/I car you want to run it even richer to be safe ~11.5-12.5

When you go to rich you start to wash the oil off the piston rings,when you go too lean stuff gets hot,butts rings together and cracks piston tops or flat out burns a hole right through the top.

[joey1320]

on a perfect day(whatever that is) you would want your air-fuel ratio to be as close to 14.7:1 as possible. this will give you the best burn; in terms of smog, performance and fuel comsumption as a total.

heres more info if needed.air-fuel ratio

[joey1320]

Originally Posted by Motorhead6T5

If you notice the graph actualy shows a richer A/F. The smaller the number the richer. The A/F on the cold air intake run is actualy very good. Stock is very lean. On N/A car you typicaly want it around ~12.5-13.5,on a F/I car you want to run it even richer to be safe ~11.5-12.5

When you go to rich you start to wash the oil off the piston rings,when you go too lean stuff gets hot,butts rings together and cracks piston tops or flat out burns a hole right through the top.

good answer.

[majicmeow]

hahaha, thanks ;)

I understand how it works (see signature ;)) but I couldnt read the dyno sheet on my work computer.

All I saw was that one of the previous posts said the mixture went leaner.

My bad ;) I stand by what I said though, even if it didnt apply to the situation :D

-Aaron

[Motorhead6T5]

Originally Posted by majicmeow

hahaha, thanks ;)

I understand how it works (see signature ;)) but I couldnt read the dyno sheet on my work computer.

All I saw was that one of the previous posts said the mixture went leaner.

My bad ;) I stand by what I said though, even if it didnt apply to the situation :D

-Aaron

[staticorex]

Thanks for putting the two next to each other and adding your 2cents. Much appreciated. I doubt my car will run too lean or rich by adding the CAI though, so I feel I'm safe. :)

[Motorhead6T5]

Originally Posted by staticorex

Thanks for putting the two next to each other and adding your 2cents. Much appreciated. I doubt my car will run too lean or rich by adding the CAI though, so I feel I'm safe. :)

Looks perfect to me,the dotted line on the a/f graph is the target ratio.