So be sure not to spend hours at a time over 170mph as the poor little electric motor trying to pull the disconnected cable back is spin, spin, spinning away and might burn out one day!farrell said:Yep
The stepper motor still actuates but there is no tension in the cable to pull
The 3.8 has completely different Motronic system to 3.6oldtimerfan said:well it's not quite that easy :grrrr:
It is true that when the throttle servo is disconnected on the 3.8 it will run faster then the speedlimiters 155.
But above that speed engine power is not the full 340...
The ecu need a speedsignal on both the 3.6 and 3.8
this is the black/white wire that runs from the tacho/dash pin 29
On the 3.6 without this signal / above 155 (tested on dyno) it had 38 HP at the rear wheel less then With the speedsignal.
haven't tested it yet on my 3.8 but i imagine it will be even more :grrrr:
speedsignal-simulator : speedsignal simulator
Due to my engine not being in an original bmw m5 body i didn't have the signal and needed to fabicate a speedsignal duplicator in order for the ECU not to run in lower power
This lower power will occur above the 155 limiter or when the signal isn't there at all
Interesting that because a group of E34's went up to Noble for a group dyno test. Of the original cars I think 4 or 5 got 339bhp or better ( up to 345bhp I think ) and the 330+ range were all chipped. Granted the cars may well have been pristine low mileage examples.farrell said:Not many 3.8 's have 340 bhp as quoted unless they have had emissions related parts like EGR & cats removed in my experience.
Yep Ralphvadas1 said:Interesting that because a group of E34's went up to Noble for a group dyno test. Of the original cars I think 4 or 5 got 339bhp or better ( up to 345bhp I think ) and the 330+ range were all chipped. Granted the cars may well have been pristine low mileage examples.
It depends what you expect from the modification.batmonger said:Hi all. Does anyone have experience of chipping a 3.8? Not sure where you would get one from but I have had mixed messages, some saying it makes a stunning difference, other saying little to none and £500 out of the pocket???
farrell said:It depends what you expect from the modification.
Outright power gains are very small.
Midrange gains in drivreability could be realised as long as you are getting a chip from someone who knows what they are doing.
Read some of the threads on this Forum & you may gain most of the knowledge you need to make an educated decision.
You must be sure of the condition of your own vehicle though.
I would recommend avoiding those chips that extend the rpm limiter.
OK that's real comforting, that means that I will be cut off when I try to go for 200..shame...:hihi:IvanDias said:say to 199mph or an arbitrary figure,