strife

Looks like 99/00 Holden cars have thresholds based on altitude Low, Medium and High and starting at, whereas 01/02 models have just the one level of thresholds with a base setting of .

Holdens that are exported to Saudi countries etc which I dont think have cats have it toggled off but all values set high at 1280

MattG

Does anyone know if the 97-98 LS1Edit software has this option? All I can find related to CAT Over Temp are some tables with numbers in them. I cannot find anywhere to disable it.

Thanks,

Reckless

iTrader: (9)

Matt...it's in the new update (Version 1.1). You have to install the update and you will see it.

Cmarsh93z

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Chris ARE 360:
<strong>CMarsh,
was the stock MAF you put back in with screen or without?
thanks,
Chris
I am experiencing an identical problem in my car and I am running a ported MAF. I am going to go out and change it now. hehehe.
thanks</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The stock one i put back on was without a screen. I used to try and tune ported Mafs, and GMS Mafs...but its a pain. 99% of the cars run 100% better with stock mafs, no screen.

BTW, when I was running 10.9 @ 123 with heads/cam, that was with a bone stock maf. No restriction at that point!

Chris

CHRISPY

thanks man what a difference!!

I swapped MAFs and went for a spin (cleaned the stock descreened MAF with contact cleaner too)

Felt like a small nitrous shot kicked in above 5000rpm. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

I bet my AF below 5000rpm has richened a bit but above 5000rpm I bet my AF doesnt tank to 10.5:1 anymore. What a huge difference. Going to dyno next week and straighten out the AF ratio.
Thanks again, I am goin to turn off the COT feature too and set everything up again AF wise.
Cheers,
Chris

StevieZ

iTrader: (3)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> Does anyone know if the 97-98 LS1Edit software has this option? All I can find related to CAT Over Temp are some tables with numbers in them. I cannot find anywhere to disable it. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The V1.1 for 97-98 has it.

CHRISPY

I picked up 30RWHP in the midrange and about at total of 35RWHP up top from the switch from ported MAF to stock descreened MAF and turning off the COT feature <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />
Cheers,
Chris

NastyWS6

iTrader: (7)

Good gain, I am gonna turn off the COT feature as well.

John B

iTrader: (10)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">I picked up 30RWHP in the midrange and about at total of 35RWHP up top from the switch from ported MAF to stock descreened MAF and turning off the COT feature
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">WOW!!!! Do you have a before and after dyno graph?

WicketMike

iTrader: (13)

do you guys have cats?

CHRISPY

No cats on my car. I have the graph here in front of me with the new pull only. I will try and get a graph printed comparing the screwed up MAF, COT on graph to the nice stock descreened MAF/COT off graph.
at 4500rpm there was a 35RWHP difference LOL
at 6500rpm 30RWHP peak difference. Felt like a small nitrous shot was added to the car. Remember though the tune was totally out of whack with the ported MAF. (had an A4 and switched to six speed with A4 tune still in the car)

Cheers,
Chris

<small>[ September 05, 2002, 01:34 PM: Message edited by: Chris ARE 360 ]</small>

John B

iTrader: (10)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> do you guys have cats? </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">No, mine were off at this time.

NoGo

iTrader: (2)

I just got done dynoing with cats on the car. My a/f tanked down to 11.7 EVERYTIME the car got above 4500 rpm.

I will be pulling the cats tonight, and redynoing the car with the cats off, and the cat overtemp feature off.

I should be able to post before and after results.

Before Results <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

348 lb/ft trq
356 HP @ 6100 rpm.

John B

iTrader: (10)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I will be pulling the cats tonight, and redynoing the car with the cats off, and the cat overtemp feature off </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">You may want to try with the CAT's on first just to see what happens!

SIKLS1

ChrisB, you can uses these pictures if you want, if you look at the AFR in the first one is 11.3:1 while the second is with the COT increased by 10% across the whole table, and the end results is 12.8:1 AFR, i still havn't dyno tested to see my gain.
Ingored the Knock Retard it is fault knock retard.
<img src="http://holdenls1.com/Temp/Run1.jpg" alt=" - " />
<img src="http://holdenls1.com/Temp/Run2.jpg" alt=" - " />

WicketMike

iTrader: (13)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NoGo:
<strong>I just got done dynoing with cats on the car. My a/f tanked down to 11.7 EVERYTIME the car got above 4500 rpm.

I will be pulling the cats tonight, and redynoing the car with the cats off, and the cat overtemp feature off.

I should be able to post before and after results.

Before Results <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />

348 lb/ft trq
356 HP @ 6100 rpm.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">did you get a chance to redyno it yet?

Ben99Z28

Would it kill both cats if I leave them on and disable the COT?? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />

Sparky

Does anyone know what the PCM has to see in order to set the COT mode?

Mark

WicketMike

iTrader: (13)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ben99Z28:
<strong>Would it kill both cats if I leave them on and disable the COT?? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">for what ive heard, you will ruin the cats for sure..
my car is at the shop right now getting the carsound cats removed and im getting the car dyno'd next weekend, so i can see what kind of gains i get w/ the cot off <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

NicD

iTrader: (7)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by WicketMike:
<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 Ben99Z28:
<strong>Would it kill both cats if I leave them on and disable the COT?? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">for what ive heard, you will ruin the cats for sure..
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I would like to know where you have heard this