if i get my crank pulley on at noon on wensday and go to the track at 4 will my car already respond to the new mod or will it take the ecu a few days??

 

ibscalbert


how many times have we talked about this darrin?

 

takes a few days. read my past posts about my crank pulley install. you need to wait at least 2 days for full effect. the engine spins freer from day one, but power shows up in about 3-4 days. come on now, you know this stuff!

 

 

Be nice to Darrin and help answer his questions.

He really just needs to get a girlfriend.

He and his car are lonely and they need some lovin'

 

 

Oh really, what changes besides your perception or desire to feel something?? How would a few HP change be felt when it is only about 1% - 2% of the total?? And have you watched the ECU values and witnessed a slow change?? If so, what values did you watch??

Please stop with this BS. It can be viewed with $120 software and you can see that any changes, not that there are with the pulley, would be observed within minutes.

Darrin, you will be fine and just drive like you always do.

 

IMO -
If I understand the ECU dynamics correctly, improvements from mods are part of the engine performance and the ECU may or may not need to compensate for a mod.

The biggest comment I have on ECU are related to each driver's driving habits. Meaning that if you were to change your driving habits, then the ECU would relearn that, but to relearn that it now has headers or an intake which allow for more air flow or reduce back pressure, those gains would happen right away.

However, the ECU may "tweak" the tuning based on certain mods, but again, 97+% of the gains would be immediate and directly attributed to the mod and not the ECU change.

Again, IMO
Ruf

 

There is only one adjustment area with regards to engine power in the ECU, it is the fuel trim. The fuel trim is an offset to be applied to the injector pulse with. These two values, long term and short term fuel trim are readily visible with any OBD-II devices which read data. You can watch these values adjust when changes are made and they will be to the point they are "comfortable" within minutes.

Our ignition control is fairly fixed and the advance value is also visible to OBD-II tools.

The only possible perceived area of change is in the shift characteristics. When getting on it the ECU may tend to allow for higher shift points but this has nothing to do with power changes.

The fuel trim changes only occur at idle and part throttle. This would prelude any involvement for the crank pulley in potential changes to the fuel trim. The benefits of the pulley are external to the engine and only affect its ability to accelerate its rotation. While this may slightly change the vacuum at WOT (most likely not enough to witness) it has no effect during cruise. As such the ECU would never know or have the ability to learn that the crank pulley was changed.

I love how some people want to go on blind faith that days are needed when the answer is just a laptop boot away.

 

I'm doing the same thing... installing my headers/icebox tonight and heading to the tracks tomorrow night... can't wait!

 

I've done no new mods but am scheduled to go to the track tomorrow night for the first time! i guess it's the season...

I have an auto. I notice when in s/s (and I've paid more attention post install of the new tranny/pcm) that the rpm's will go to almost 7100rpms. I'm NOT gate shifting, this is in s/s. Now, I'm trying to shift around 6800 or 6900 rpms, but it is extending into the redline...
Any ideas why? I thought only gate-shifting would accomplish this, though I don't see it as the most desirable thing to do since the hp/tq may drop off that high, but then again, I'm higher in and the next shift places me higher in the next band as well. It was more found by error than anything...

 

what crank pulley are you installing?

 

me and the ack are havin a 3 sum w/ a whore tonite

 

unorthodox racing

 

if any body is married to their car its you,

its leased and has like 5 miles on it, never sees the rain, drive it like once a year

brian havent u been married for such a long time w/o no kids

 

Yes everyone, I am proud to say that my 2001 CL-S is now PAID IN FULL.

It has 32,000 miles on it and has been driven on wet pavement fewer than 20 miles in the past 3 years. It sits in the garage on white berber carpeting.

I HAve been divorced since 1995 and we choose not to remarry for tax/financial reasons

 

damn i didnt know u had 32k on it,

u comin to the track w/ us tommorw, get them headers in