hi,

i want to program an 27c512 with 2 different 32k files.
1 for revlimiter @ 4000
1 for the normal stuff.

why not using the launchcontrol? because i have obd0 and it sounds slow and lame.

so i need to switch the programms while the engine is running and use the normal revlimiter.

ive found this thread about 2x 27c256 on eachother with some resistors and a switch.
but its not adviesd to switch between the programs with the engine running.

OBD1 (413) Dual Tune DIY - Bimmerforums - The Ultimate BMW Forum

 

i don't understand why you aren't using launch control...

I've stuff like this done on 80s turbo dodges, so i don't see why it couldn't work for you. launch control just seems so much easier, tho.