So for some time now we've known that the DFI motor is going to be in the
GT3
(it's already in the Carreras and the Turbo) which means the Mezger is, as far as I can tell, donezo.
Now above and beyond the obvious differences, like better fuel economy, higher revving, and the whole direct fuel injection thing, I was wondering what some of the differences between these two motors are? I'm specifically interested in the internals (I think the new
GT3
gets different engine mounts? maybe that's wrong though).
Do you think something is lost in the
GT3
now that the mezger's been phased out? Or maybe you just can't see past the whole no manual transmission thing haha...
There's no "maybe" or "haha" about it...for me, the 911 range now tops out at the 50th Anniversary Edition. Obviously, JMO...
?, care to explain ?
Cheers
Perhaps it will eliminate all of that rear main seal leakage
Lots of discussion on forums about the
GT3
changing from the Mezger to the 9A1. Some of it seems based on emotion or nostalgia. The Mezger has a long motorsports heritage. It's a true dry sump and considered very stout despite cooling pipe issues, RMS leaks, etc. The 9A1 in the new
GT3
has many differences to the version in the Carreras, Boxtsters,
Caymans
allowing a 9000 rpm redline. The description I've seen says it is dry sump too, but haven't seen details on that yet. From the early journo tests, the new
GT3
motor is getting rave reviews and the early criticism of moving away from the Mezger seems to be dieing down. Yet to be seen whether the DFI 9A1 becomes the motorsport engine but seems likely. If it does then the
GT3
will again have the motorsport connection. The
GT3
being
PDK
only, with RWS, CLs and increased weight are still issues to some.
Or maybe they weld in the coolant pipes instead of gluing them in, so they don't blow out and dump coolant all over your rear
tires
...........
I really don't care if they dump coolant on their own
tires
it's when they leave it on the track right in front of me that I get upset. It happened to me at VIR at the top of the esses. Fortunately it was a warm up lap and I wasn't really on it. I still had a rather nice off track excursion.
The 9A1
GT3
engine is a true dry sump engine with a separate oil reservoir and return. Its valve train is unique and closer in design to a racing motorcycle than a 991. The Mezger engine in the water cooled era (996/997 Turbo/
GT3
/GT3RS/GT2) was derived from the GT1 LeMans engine which itself was a water cooled 4 cam head variant of the flat six found in the 964/993 series which trace their roots to the original 2.0L flat six of 1965. The need for water cooling and the 4 cam head added complexity to the original air cooled engine and hence the
IMS
/RMS debacle of the early M96 engines which were cheaper production versions of the basic
Porsche
flat six design. The use of the Mezger engine in the 996/997 era may have said less about its general superiority than about the deficiencies of the M96/M97. Nostalgia for the old air cooled flat six often obscures memories of leaking case studs, blown air boxes, worn valve guides, and pre-hydraulic chain tensioner failures.
