Its not for the speedo. Its so the trans has the proper speed signal to base its shift pattern off of.
0-60 run
- Thread starter BAD97LSC
- Start date
You don't need a speedcal either my tranny shifts fine with just a sniper tune with 4.30's.
Cookie for you. The reason why is because in the Sniper tune you can tell the tune what gear you have. The Sniper software manipulates the VSS signal to allow for proper transmission shift scheduals.
There really is no base tune for a Mark in the SCT versions, they are all fairly custom. So when a tune is written for a Mark then the trans points need to be changed one by one and on a mail tune that makes it very hard. Since the trans tune that was done is similar to the stock pattern as far as what speed to initiate the change then the easiest way would be to manipulate the signal the computer sees to make that change. Otherwise he has to pull the computer, wait for a rewrite, install it again and it may still be off some.
driller
Dedicated LVC Member
Really???
You start with the PCM code, in my case a 57kB file for W3Z2 and add 'value files' from there.
For example, my SCT directory has this 23kB "value file" addon...
C:\Program Files\SCT\Advantage III\value files 2009\Ford-Linc-Merc\Mark VIII\4.6L 4V Mark8 410+ Axle NA.mvf
You can modify the base tune out of the box with value files for most every common modification such as different MAFs, injectors, etc... including all gear ratios from 2.73s to 4.88s.
And that's before you begin to really get 'custom' and end up with something like w3z2_42s_430s_Mark8.mtf at 126kB.
But, it all starts with the 'base tune' file.
You missunderstood what I said. There is no real base "can" tune for the Mark. I have this on good authority from someone in the tuning worl I know that was traind at SCT and wrote code for them.
The can tune that SCT is not really a can tune because its based on a Mark with a 3800 stall, 4.30 gears and nitrous. Thats why for us with SCT tunes we have had to build them ourselves off the cars stock tune or had to pay to have someone to make them.
I have stared for many hours at the SCT Pro software comparing their "can" Cobra tune to a Marks and can see the whole fuel map is drasticaly different between the two. They should be kinda close all things being considered (except trans for obvious reasons) but you can see in the files that the "can" Mark tune is for an engine moving MUCH more air and with a larger the 24lb fuel system.
Now for an OBD1 system this may be completly different as I have not looked into the earlier setups at all. Since we are discussing an OBD2 system I didnt see any reason to discuss earlier setups.
96-01 Cobras have 24lb injectors and the same 80mm mass air meter.
Yes they do. And?
