VT 5.0L (CNPK) Info

Holden/Delco Tuning. ALDL, OBD 1.5. Circa 1989 to 2004.
vn5000
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VT 5.0L (CNPK) Info

Post by vn5000 »

I booked a vt 5.0 ss auto in today for a chip upgrade and when i opened the ecm i found it had a chiptorque memcal already in it .The sticker on it says VT V8 CNPK A.HP2 .
I read it in the programmer and to me the spark advance table values seem to be quiet modest compared to what i run on my 5.0 lt.
Has somebody got a copy of the standard CNPK bin so i can compare the two and see what they have changed.Also does anyone know if i can put hsv 195 bin such as CNPF in this car without any mods ie inj size,and use this bin as starting point,and how do you calculate checksum [is there a special way like $11.]or should i just use AA.
As the chiptorque chip cant be reprogrammed by me ,as far as i can see there should be no probs erasing and reprogramming a VS memcal and using it in Vt ecu.
Im using xdf $A6C and seems to line up ok.Is there a later and more defined xdf available as when i compare CNPK with other $a6 bins there are a lot of undefined items that appear to have been changed.
Any help appreciated .
yoda69
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Re: VT 5.0L (CNPK) Info

Post by yoda69 »

VN5000, attached is a copy of CNPK.
CNPK.bin
I haven't done much more on the xdf for $A6 for a while will try and have bit of a look into it.
This is a $A6 Variant E from what I can see.
As far as checksum, I worked out recently that for the bins I checked so far are $2008-$1FFFF and stored at $2006/7, this is also the same with $A5.
For Variant E compared to Variant C there appears to be an offset of +2 bytes starting at $380F to $53B7, if you update the xdf with this should help.

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VL400
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Re: VT 5.0L (CNPK) Info

Post by VL400 »

Thanks yoda69, have added a copy to the holden bin library.