PE always changing C5

[driver240]

i don't know what to do ...after i set my pe table , my pe is good for few run and after that it goes to 11.3...and it should stay at 12.8...i think my mapping still be of a 346cid ..what are the step to do ..? please help me..!!

427cid lq9 prc 5.3 heads., arh x-pipe3po,hotcam,big mouth nick william102mm and fast lsxr 102mm

[mecanicman]

Using the search function would likely show you your cot is active, but post the log and tune at least.

[driver240]

i disabled my cot ...but here is my log ...thanks

[mecanicman]

Thats a tune file, not a log. Your engine size under engine general is not corrected for your 427. Your injector data is wrong. And your PE settings are different across the board. You need to do some more reading, put the correct base information in first, and then start over.

[driver240]

my value change to 0 when i try to put one in the engine size ...and area scalar same thing..do you know how to do it ..?

[mecanicman]

I had no problem entering 0.875 for the engine size in your tune.

http://www.hptuners.com/forum/showth...ghlight=scaler

[driver240]

when i push enter it goes down to 0..and i do not understand why when i put a value in the area scalar it goes to 0 too

[driver240]

why do i have problem with that then..? all i do is record my value and it goes to 0

[driver240]

the day i will be able to change these values will be great day for me..

[LSxpwrdZ]

Right click on the cell and go down to precision and set it to at least 3-4 decimal places. Also make sure you are in L for liters or you can do in3 for cubic inch. Remember this is per cylinder so it will be total displacement divided by 8.

[Cantalope Kid]

From your tune...

PE ratio: 1.24805 1.24805 1.24805 1.24805 1.24805 1.20020 1.20020 1.24023 1.24023 1.24023 1.24023 1.24023 1.24023 1.19043 1.19043 1.19043 1.19043 1.19043 1.33984

When your vehicle goes into PE mode its takes the above X/14.62 (stoich value). i.e. 1.24805/14.62 = 11.7 Commanded AFR. I believe these are the original stock values in your tune. Anyhow just because they are there doesn't mean you will achieve that value in the VCM Scanner software using your wideband. It means IF you have started with good injector data and tuned your VE/MAF table(s) correctly you should be able to get within 4-5% error of the Commanded AFR result consistently. These values CAN be different from rpm to rpm in your tune but we recommend you choose a PE mode value that is similar , i.e. 1.17000, until you get your baseline tune to consistently acheive your tunes Commanded AFR. Then you can change these values back to whatever will results in best power for your situation.

[Cantalope Kid]

Engine size:

1 cubic Inch =16.387064 cubic Centimetres. 427 cubic Inches =6999.7 cubic Centimetres. 6999.7 cubic Centimetres =6.9997 Litres or approx. 7 Litres when rounded off. 7 Liters / 8 Cylinders = .875!

[driver240]

ok ..it was exactly like you wrote to me...3-4 decimal and displacement are in L...i'm very confused

[driver240]

it goes down to 0 when i try to record it

[driver240]

i undersand that my ve table are not perfect..because it variate between 13.8 and 15.8 so when the pe mode is enabled maybe it take on 15.8 and maybe 13.8..? that what i can understand ...? so 15.8\1.24=12.8 and if it takes on 13.8/1.24=11.2...??if i understand well ...?

[driver240]

does someone could explain me how to set a good ve ....with the scanner i suppose..? i don t know how to see where had value or remove them..? does i need to cancel the o2sensors and how can i do it..?

[gn2beatu]

Start by reading the VE tuning guide. Google "hp tuners ve tuning guide"

It wouldnt hurt to find a forum of people that have the same car you do and join it. Then you can find people in your area that have not only the same car, but have hp tuners. You would be surprised how many people will help a fellow gearhead that has the same kind of car. But seriously, best bet on your first tune is to have someone walk you through it, rather than blunder through it blindly. G/L :-)

[Cantalope Kid]

Best member page with "How to" i've ever seen. Enjoy!

http://ls1tuningguide.com/tuninghelpfiles.php

[swebld]

Yeah we´re just waiting for Jeff´s Advanced Tuning Guide ..