upgrade chip any available
Discussion
The 4lt mapping is pretty good as standard, you cant get an extra magic 10 bhp just with a chip change. You would be better off with a variable fuel regulator, and a rolling road session to trim the max power mixture, and let the ECU take care of the less than full power mixture. Chipping is very expensive (around £350 +) and not worth it on an unmodified engine.
Blitzy is right though, assuming everything is ok there's no gains to be had from remapping basically std spec cars, indeed you have to modify quite a bit before it becomes necessary in my experience (though the experience of other people may differ etc etc) .. a 5 litre griff was in the other week and i found another 20hp just by getting it set up correctly .. you never know you might be throwing hp away needlessly without realising it, then again it might be perfect as is with no gains to be had, but unless you test it you don't know 
The guy went away with another 20hp that he didnt know he was missing. That's where you need to be spending a bit of time and money first before even thinking of mapping.
The guy went away with another 20hp that he didnt know he was missing. That's where you need to be spending a bit of time and money first before even thinking of mapping.Open the ECU up and look for the big chip in a socket. The TVR ones Ive seen have black tape over them with cryptic clues like "3.9 cat" written on a small lable over the tape. Mark Adams chips have scrambler PCB fitted below the main chip so sit higher in the socket.
read here, but dont believe all the hype !
http://www.v8engines.com/carbs-2.htm
read here, but dont believe all the hype !
http://www.v8engines.com/carbs-2.htm
Gassing Station | Chimaera | Top of Page | What's New | My Stuff