Originally Posted by
velociabstract
Steve! Good to hear from you. The ECU is set at 6500 but the TCU will be at 6400 and that's where it'll shift. Currently in my car is an Evotech TCU with a raised limit and I've been banging off the limiter with no ill affects, so far. My thinking goes like this. The valves in our engines are tiny and on the light side so that's a plus. I read the MB forums and it seems quite a few over there are red lining at 6800. I haven't seen a "blew the motor" story from the raised limit. Then I start thinking about how many cars I've owned that lasted over 10 years. If it blows after a while I'll find a nice Porsche or CL65, but I think the engine will endure despite the extra rpms. If anyone knows of a blow engine (3.2) with a raised limit I'd like to know about it. I could be playing with fire. Perhaps I've convinced myself otherwise erroneously.
Steve, since you know the guys at Buckhead could you ask them their opinion?
Les
be happy to ask. my thinking is the springs are built based on a 5800 rpm limit. raising the limit to 6100 is done on a regular basis but it has to have an impact on the strength of the springs. raising it to 6500 or 6800 is putting them in dangerous territory and with a zero clearance motor drop a valve and you wipe out the top end possibly killing the cams as well.
swapping the rear is fine but i would tread lightly on the valve train. just my .02 that and 5 bucks gets you a latte at starbucks!
