Pro Mouse

iTrader: (15)

Is It Benificial for me to Have my Cars computer reprogramed for max Performance on a Dyno?A guy locally to me does it.My Car is a bolt on,Mods are in my sig.Tell me what you guys think

Scott

Kevin V 2002 SS

On a dyno, with a wideband, is the only way to get the best tuning done.

Wicked ls 1

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Kevin V 2002 SS:
<strong> On a dyno, with a wideband, is the only way to get the best tuning done. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">what he said. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

Team ZR-1

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Team ZR-1:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Mouse:
<strong> Is It Benificial for me to Have my Cars computer reprogramed for max Performance on a Dyno?A guy locally to me does it.My Car is a bolt on,Mods are in my sig.Tell me what you guys think

Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">IMHO, using a dyno is most cases is a waste of time and money.
Your not on a dyno long enough for the PCM to really adjust, its not real world and as shown at the URL listed below the engine is only at maximum engine load less then a few seconds where if you used a scanner and recorded a drive on the street you would get more valid data to make tuning decisions on.

12 C5s Dyno'd same day

12 Corvettes of 20 we dyno'd on the same day, each owner was behind the wheel and controlled the gas pedal. This covered all C5 model years.

This is 3 seconds of when the engine was at its maximum engine load and as seen many of them were only at 100% engine load less then 2 seconda thus you cannot base tuning with so little engine load time, esp since the PCM only does realtime changes about every 10 minutes.

In this case those that were PCM tuned on the dyno, then tuned by me using recorded street driving ended up with a better overall tune for both idle, part throttle, PE and WOT.

Wideband O2s are not required to achieve a performance tune, it's the method of how you test and tune that gets the best results. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">

Team ZR-1

<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Pro Mouse:
[qb] Is It Benificial for me to Have my Cars computer reprogramed for max Performance on a Dyno?A guy locally to me does it.My Car is a bolt on,Mods are in my sig.Tell me what you guys think

Scott </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">IMHO, using a dyno is most cases is a waste of time and money.
Your not on a dyno long enough for the PCM to really adjust, its not real world and as shown at the URL listed below the engine is only at maximum engine load less then a few seconds where if you used a scanner and recorded a drive on the street you would get more valid data to make tuning decisions on.

12 C5s Dyno'd same day

12 Corvettes of 20 we dyno'd on the same day, each owner was behind the wheel and controlled the gas pedal. This covered all C5 model years.

This is 3 seconds of when the engine was at its maximum engine load and as seen many of them were only at 100% engine load less then 2 seconda thus you cannot base tuning with so little engine load time, esp since the PCM only does realtime changes about every 10 minutes.

In this case those that were PCM tuned on the dyno, then tuned by me using recorded street driving ended up with a better overall tune for both idle, part throttle, PE and WOT.

Wideband O2s are not required to achieve a performance tune, it's the method of how you test and tune that gets the best results.

Pro Mouse

iTrader: (15)

Thanks for the info John

Tim Sloper

How could one possibly achieve a performance tune (let alone a safe tune) on a FI setup without a wideband? You have absolutely no accurate indicator of A/F ratio without a wideband sensor. N/A setups may be more forgiving if you are off on A/F ratio (lean conditions) but there is only one "correct" way of performance tuning these cars and that is with a wideband... whether on the street or on the dyno. The street would be the prefered method with a wideband but that isn't practical for most people for obvious reasons.

Tim

Pro Mouse

iTrader: (15)

I agree Now ,Tim And Predator <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" /> I talk with the guy today,And I decided to go for it!He is going to tune with Wide band o2'sI am not happy with my performance from my mods.So I am just going to try this.I can Allways fine tune it at the track per MPH.He also is going to to set my Knock sensors just enough to get rid of my False Knock that I have Had since I went to the SLP Valve Springs.I will let you guys know how it seems to run afterwords..
Thanks for your input on this topic guys

Scott

Predator

Your "accurate indicator" is an accurate DELTORQ scanner reading: the highest delivered torque value is the a/f ratio you want, regardless of O2 readings.

CamaroCain

iTrader: (1)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I am not happy with my performance from my mods. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I am confused as to how you can say this. In your sig, it says you don't have any times (slips) on your car. What exactly were you uphappy with? Just wondering because I am a bolt-on only car myself and have considered tunning in the future. Any updates after the tune?

Lynda

Pro Mouse

iTrader: (15)

Hi Lynda
My Car is extremely inconsistant.My Best time is 12.64@112.32 mph at the Track,But my 60ty footer was real bad 2.15.Which is fine ,But unlike most people I can tell you when my car is running good or poor.I use a G Tech just to test not for time.Just to see how my car is running same street same launch so the g tech is right for doing this,I ussually try to keep the same weather when I run. Car runs rich then lean back and forth.The MAF Translator is Junk for a Daily driver.It is ok to use at the strip.I had it Tunned on a Mustang Dyno with Wide band o2's
I have only got 295HP@5750 and 302ft Torq @ 4000
I have around 360 HP at the fly wheel.I was expecting a little more.

CamaroCain

iTrader: (1)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">I have only got 295HP@5750 and 302ft Torq @ 4000 </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Is this before the tunning
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">I have around 360 HP at the fly wheel.I was expecting a little more </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">and this after?

I see what you mean though. My car with somewhat similar mods as yours dynoed around 320 rwhp and 331 rwtq.

How is the car running now after the tunning? Are you pretty much all around happy with the results?

Lynda