AFTX mem-cal
This is the original 1988 VN Commodore mem-cal, introduced with the very first VN's on the market. It was quickly replaced by later-1988 APNX mem-cal, apparantly (according to one source) due to backfires.
Can someone supply me with a spark map shot/copy of AFTX? I don't have a program anymore that can view the configs of chips.
Also, can someone supply me with a spark map of the factory LPG chip BBMM? I want to compare it with some so-called aftermarket performance LPG chips.
Last edited by Aliens; 14-02-2009 at 10:47 AM.
There is no such thing as a aftermarket lpg tune for the V6 that I've seen, There's very little difference between the ideal spark timing for premium fuel and for lpg so that would be pretty much a waste of time. BBMM just has a normal series 2/VP spark map as below
29.88 52.73 34.80 33.05 33.05 30.94 27.77 27.77 27.07 26.02 24.96
29.88 43.95 31.99 31.99 31.99 29.88 27.77 26.02 26.02 23.91 23.91
29.88 45.00 34.80 31.99 31.99 30.94 28.83 27.07 27.07 26.02 24.96
29.88 40.78 34.80 33.05 33.75 27.07 28.12 23.91 22.15 22.15 22.15
29.88 40.78 34.80 33.75 31.99 26.02 27.07 23.91 22.15 22.15 22.15
29.88 43.95 34.80 31.99 30.94 28.83 27.07 23.91 22.15 22.15 20.04
29.88 45.70 33.75 31.99 29.88 28.83 26.02 22.85 21.09 20.04 18.98
29.88 45.70 34.80 31.99 29.88 26.02 24.96 22.85 20.04 16.87 15.82
20.04 46.76 35.86 30.94 27.07 24.96 22.15 18.98 15.12 14.06 10.90
20.04 34.80 33.05 29.88 26.02 22.85 15.82 13.01 8.79 7.03 4.92
20.04 26.02 34.80 30.94 22.85 21.80 15.12 13.01 9.84 4.92 2.81
20.04 20.04 20.04 20.04 20.04 15.12 9.84 9.84 5.98 4.92 4.92
AFTX is attached but there really northing special about it, Something like APNX is about the same
Donating Member
i got one of those spnx memcal lying around somewhere pulled out of a calais at the wreckers i didnt think they made production but obviously must have
Originally Posted by Smidy
The so called performance LPG mem-cals I mentioned are on eBay from a seller with a name along the lines of black 7000.
The BBMM chip requires $03 to open, doesn't it?
Last edited by Aliens; 15-02-2009 at 09:52 PM.
APNX is a late 1988 VN chip, and is quite common because it was simply the chip of late 1988, and also served as the replacement chip for the original VN chip AFTX.
AFTX basically was found in September 1988 complianced VNs however some VNs (e.g. ones not sold already) had APNX installed as a service fix.
Donating Member
sorry i meant the atfx one your after didnt read what one you wanted properly i know i got that one as i looked it up and it said that crap about backfiring
Can you confirm whether this map is the actual BBMM map or is it a similar one?
Last edited by Aliens; 15-02-2009 at 08:59 PM.
If it says AFTX, do you want to sell it? If so I'll buy it. They are very hard to find, and I only have one at the moment.
Yes that's the spark map from BBMM, AFTX is rare but not impossibly so, I've rubbed over quite a few over the years:P
Just saw two eproms from these laying in my pile of removed junk eproms that I've pulled to make VR/S memcals lately so they can't be as rare as I though't, wouldnt be suprised if I've rubbed over 20-50 of these
Compared with any other VN mem-cal they are very rare. They only existed for a bit over one month and even then, some of these were swapped for APNX in October.
Only about 10-15 thousand of them existed - not taking into account ones swapped out for APNX and ones not making their way into a production car.
Perhaps many more very early VN Commodores were actually sold over there.
Why do you want them if there obsolete and caused problems?? if its the performance factor then ask greenfoam to make you a real tune.
on holiday
hey greenfoam what do you do with your junk eproms as you call them ive got an eraser and would be keen on getting some old eproms
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