Actual Readings +/- ????

[moreause]

Quote: Originally Posted by 19 psi

Quote: Originally Posted by moreause

but clamping the psi signal will not change the knock retard

You make a valid point but are you saying the PCM makes no distinction between timing and the amount of boost in the manifold? If so, I think many on here would give you a good arguement for that, not trying to be a dick but I think there are some timing benifts to a MAP-clamp....

yes clamp give you better timing

better timing...(more timing) give more power...until you have to much timing so you get knock that pull timing

tuning is a recipe between all of these timing fuel ect

what you what is the most timing whitout knock
that's not fully thru but you get the idea...

[MoparbeastSRT4]

Hey Todd,

I've been monitoring the Ignition Advance on the gauge and I don't really understand this.
When I fisrt turn on the car at idle the setting reads 17 to 19 degrees then I start driving it's about 40, 41,42 then at idle when i come to a stop it reads 9 to 11 degrees.

So
Idle cold start 17 to 19
Cruising 40 and higher
Idle warmed up 9 to 11 and sometimes even lower then 9
at WTO on my S1 around 21 to 24 something like that.

Does this sound normal to you?, BTW I've monitored Knock Retard @ WOT and I've never seen a number there which I think it's all good I guess.
I'm currently running 19 to 20 pounds of boost with my mods.

Thanks

[2004HKSSRT4]

i just raced it a few times today. my o2 sensor reading in 3rd is .94 and in 4th .92 so i know that is good. it has been a while since i flored it. maybe 2 weeks, anyway when i got on it todday for the first time my car was showing .5 to a max of 1.0 knock. it only showed that the first time i got on it today. every other time i raced it after that today it stayed at 0 knock. is that cause my pcm readjusted itself so it wouldnt see knock after my first run? im on pcm controlled boost.

[vschaos]

Ok so the guages record whatever 2 settings you have on them and you can play it back? Is there a way to pull whats recorded on the guages to your labtop. Just wondering because would be cool to put it on a graph. Like overlay your datalogs of timing, knock and rpm or whatever you choose to log. I myself would like to monitor my timing and knock since I am big turbo and running a fair amount of boost. My FTM I monitor things with now datalogs, but doesnt datalog the knock and timing I so depersatly need to monitor. So I guess I am asking can you download the recordings from the guages to a labtop or any other way?

[2004HKSSRT4]

Quote: Originally Posted by 2004HKSSRT4

i just raced it a few times today. my o2 sensor reading in 3rd is .94 and in 4th .92 so i know that is good. it has been a while since i flored it. maybe 2 weeks, anyway when i got on it todday for the first time my car was showing .5 to a max of 1.0 knock. it only showed that the first time i got on it today. every other time i raced it after that today it stayed at 0 knock. is that cause my pcm readjusted itself so it wouldnt see knock after my first run? im on pcm controlled boost.

is .5 to 1.0 knock bad????? and why did it only read that the first time i got on it and every other time there was no knock. did the computer lower my boost or pull timing. i am pcm controlled

[forcefedjunkie]

What you're seeing is prety much what I saw with S1. The advance sounds totally normal.

"0" knock is great, I bet you're running rich though to get no knock at 20psi or have a very good IC.

Todd

Quote: Originally Posted by MoparbeastSRT4

Hey Todd,

I've been monitoring the Ignition Advance on the gauge and I don't really understand this.
When I fisrt turn on the car at idle the setting reads 17 to 19 degrees then I start driving it's about 40, 41,42 then at idle when i come to a stop it reads 9 to 11 degrees.

So
Idle cold start 17 to 19
Cruising 40 and higher
Idle warmed up 9 to 11 and sometimes even lower then 9
at WTO on my S1 around 21 to 24 something like that.

Does this sound normal to you?, BTW I've monitored Knock Retard @ WOT and I've never seen a number there which I think it's all good I guess.
I'm currently running 19 to 20 pounds of boost with my mods.

Thanks

[forcefedjunkie]

My only thought is that when the engine is still cool the charge air is also cooler going though a cold TB and intake, leaning out the mixture a bit a resulting in a little knock.

Todd

Quote: Originally Posted by 2004HKSSRT4

i just raced it a few times today. my o2 sensor reading in 3rd is .94 and in 4th .92 so i know that is good. it has been a while since i flored it. maybe 2 weeks, anyway when i got on it todday for the first time my car was showing .5 to a max of 1.0 knock. it only showed that the first time i got on it today. every other time i raced it after that today it stayed at 0 knock. is that cause my pcm readjusted itself so it wouldnt see knock after my first run? im on pcm controlled boost.

[moreause]

what i have seen

for me i normally see 1 to 3 degree and even more but i try to leave it lower
if the air is humide the knock stick to 0 (i'm looking into a big fmic)

i'm on stock intercoller...so when getting on it the intake temp goes hign and you get knock

but on very hot days the pcm seem to pull timing ...so you get less knock

[moreause]

Quote: Originally Posted by vschaos

Ok so the guages record whatever 2 settings you have on them and you can play it back? Is there a way to pull whats recorded on the guages to your labtop. Just wondering because would be cool to put it on a graph. Like overlay your datalogs of timing, knock and rpm or whatever you choose to log. I myself would like to monitor my timing and knock since I am big turbo and running a fair amount of boost. My FTM I monitor things with now datalogs, but doesnt datalog the knock and timing I so depersatly need to monitor. So I guess I am asking can you download the recordings from the guages to a labtop or any other way?

from what i know i'ts nor possible...that was a points in the way they sell it

easy to work but you could not connect it to a pc...that was a choice

[Sota]

Boy this wound up being a biggie of a post.
where cruise is between 50 and 70mph...

• Engine Coolant Temp: 200F at full warm up. Swings +/- 20F or so depending on speed, air temp, position of guardian angel, etc.
• Throttle Position Percentage: no data
• Engine Load: 14-22 at idle (depending on weather and how hard I've flogged it )
  no other data
• Knock: 0 (never seen anything else)
• O2: varies all over the map
  Locks to 900 at WOT
  Goes to 0 on closed throttle decel
  Idle seems to try for a 400 as an average (I have this thing with numbers... I can look at a list or watch a rapidly changing display and get a pretty good idea of what the average is with out doing any actual calculations)
• Boost: -11.7 psi to 12.3psi so far
• Injector Pulse Width: 1.4ms at idle. Haven't paid attention at WOT. Too busy driving.
• Advance: max 45 at cruise, normalized 26 at WOT
• Long Term Trim: 0 +/-2.3 swing range nominal for cruise and WOT
  maximum swing... +/-12 deg
  Curiousity here... after full warm up and some moderate (10+ minutes cruising),
  when I come to rest at say a traffic light, my LTT will go up to as high as 10-12 degrees.
• Short Term Trim: 0 +/-12 swing range nominal for cruise and WOT
  this one really jumps all over the map depending on how the car feels.

Questions and observations...

• Fuel Trim values. POSITIVE values are fuel being cut. NEGATIVE values are fuel being added. Correct? I ask this since the word "trim" implies a removal of fuel, so a negative trim value would imply an addition (double negative and all that.)
• LTT varies frequently, but obviously not as rapidly as STT which is damn near epileptic at times. I'm guessing that's a normal condition.
• I've even see times (specifically at stop lights) when STT and LTT are nearly identical values, just different signs.
  I'm assuming that means the car is using STT to trim out whatever LTT is doing... sort of fighting itself.
• When closed throttle decelerating from sufficient speed...
  • 11psi or higher indicated of vacuum is seen
  • Advance locks to 25
  • STT and LTT lock to 0
  • O2 output locks to 0
  • Injector Pulse Width locks to 0
  Note: for the above, sometimes IPW does NOT lock to 0. I then notice significant afterfires and backfires. Why is the ECU still fueling the car when it should be in total fuel cutoff? I'd love to see a discussion on this one.

I'll add/edit this list as I view more of the parameters during various conditions, and try to collect and catalog distilled answers.

[TigreTek]

Quote: Originally Posted by Sota227990

Note: for the above, sometimes IPW does NOT lock to 0. I then notice significant afterfires and backfires. Why is the ECU still fueling the car when it should be in total fuel cutoff? I'd love to see a discussion on this one.

i don't know what your mods are, but:

intentional tuning by DCX for "pops and burbles" on decel?

[Sota]

Quote: Originally Posted by TigreTek

Quote: Originally Posted by Sota227990

Note: for the above, sometimes IPW does NOT lock to 0. I then notice significant afterfires and backfires. Why is the ECU still fueling the car when it should be in total fuel cutoff? I'd love to see a discussion on this one.

i don't know what your mods are, but:

intentional tuning by DCX for "pops and burbles" on decel?

As I said in my post title, bone stock for power mods.

If it's intentional why doesn't it do it all the time. I can go over one rolling hill and have it cutoff fuel on decel, yet the very next rolling hill at the same speeds I'll not have it happen. As of yet I can't seem to find a correlation between fuel cutoff and any other event or parameter reading. It'll lock the ignition advance, 0 out the fuel trims, but won't kill the pulse width.

[moreause]

i was just wondering ?

does somebody have HOM timing? just to compare with a S0 or else
every body say it give more timing...but i'm still wondering how much?

[letxen3]

Quote: Originally Posted by forcefedjunkie

Throttle Position Percentage what's the number suppose to be +/-

In theory it would read 0-100%, but the SRT-4, like most cars, seems to have a narrower range. I think I see like 7-90%.

Hope that helps a little bit.

Todd

while driving and i let off the gas it goes to 13% throttle %

[moreause]

dam it's cold tonigh i have 65534 F in intake temp

the gage doensn't go below 0 ...that should be the way mother nature do it too