DME Rev Range
#1
6th Gear
Thread Starter
Join Date: Nov 2006
Location: West Sussex, UK
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Hi all,
Considering a 997S X51 at the moment. Have asked for a log of the DME, can someone confirm for me the following:
Range 1: 7300-7500 RPM
Range 2: 7500-7700 RPM
Range 3: 7700-7900 RPM
Range 4: 7900-8400 RPM
Range 5: 8400-9500 RPM
Range 6: 9500-11000 RPM
..and that ignitions in 4, 5, 6 is the area of concern?
What is acceptable? I imagine any ignitions in 8400+ is starting to get serious? The rev limit is increased on X51 correct, but to what?
Thanks!
Considering a 997S X51 at the moment. Have asked for a log of the DME, can someone confirm for me the following:
Range 1: 7300-7500 RPM
Range 2: 7500-7700 RPM
Range 3: 7700-7900 RPM
Range 4: 7900-8400 RPM
Range 5: 8400-9500 RPM
Range 6: 9500-11000 RPM
..and that ignitions in 4, 5, 6 is the area of concern?
What is acceptable? I imagine any ignitions in 8400+ is starting to get serious? The rev limit is increased on X51 correct, but to what?
Thanks!
#2
Newbies Hospitality Director
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Join Date: Apr 2005
Location: Winston-Salem, NC
Posts: 18,084
Likes: 0
Received 34 Likes
on
33 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I could be wrong but I do not believe the rev limiter on a X51 equipped 3.8L engine is increased from a base 3.8L engine, which is 7,200. The GT3 engine has a rev limiter of 8,400 RPM.
#3
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have seen listed as part of the X51 package that stiffer exhaust valve springs are installed to help facilitate a higher rev range and higher red line. I have been led to believe that red line on my X51 is 7,500 rpm and that is what I have used for over 12,000 miles; the rev limiter kicks in somewhere just north of there and I have hit it often. I would guess (and that is just a guess) that the DME ranges for X51 have been increased to be more in line with it’s higher rev range.
#4
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Actually I believe the redline is increased with the X51, hence the stiffer exhaust valve spring to 7400rpm.
There is no change on the tach though...
Porsche ignores ranges 1-3 you start getting into the higher ranges they can deny warranty coverage.
Dave
There is no change on the tach though...
Porsche ignores ranges 1-3 you start getting into the higher ranges they can deny warranty coverage.
Dave
#7
Guest
Posts: n/a
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Porsche probably just changed the fuel cut off range to 200-300 rpms higher...
The non P/K S develops its peak HP at 6600 rpm where the X51's peak HP is 600 rpm higher at 7200 and max torque is 900 rpm higher @ 5500 rpms on the P/K car
The non P/K S develops its peak HP at 6600 rpm where the X51's peak HP is 600 rpm higher at 7200 and max torque is 900 rpm higher @ 5500 rpms on the P/K car
Last edited by 500; 10-14-2007 at 10:23 PM.
Trending Topics
#8
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I think ranges 4, 5 & 6 would be mechanical overrevs such as missing a downshift at speed and would be very worrisome. The others would be managed by the rev limiter...and we've all hit that once or twice!