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Tom, there's no way the Metger engine will be in the 991 GT3/GT2. That would defeat the purpose of moving to a new A91 engine with the rest of the range. I think the reason the 997.2 GT3/GT2 don't have the A91 engine is because it hasn't been race proven/honed/bulletproofed yet. I would be AMAZED if the 991 GT2 has 620bhp or more from the new A91 engine!! It much more likely to be lower power with less weight. Frankly I think 600hp is the absolute limit for any road going car anyway - not only can't you use/put-down that much power onto the public tarmac in a completely safe way (especially with only 2wd) but also these hp levels only really have a big performance impact above speeds of 100mph. ie. it's really a track tool only. So I think this is the last hurrah of the Metger engine in the GT2RS. Porsche have taken it to the (read: their) max as a final goodbye. Also, I heard that this car has been ready for a long time now. They just didn't announce it until now as they didn't want to step on the toes of the new Turbo (and S). So development moved on from the Metger engine quite some time ago.
Surely thats the " a journey of a thousand miles begins with with a single accelerator prod"[ORIGINAL: Alex L- unless you are driving... Sorry - getting off topic here!ORIGINAL: tscaptain“A journey of a thousand miles begins with a single stepâ€[ORIGINAL: Alex L The new coronated king is a 2 year old though [
] In the 997 it was always just the casting from base of the engine block carried over from the original Metger engine - Porsche with their focus on continuous evolution have over the years changed the old Metger engine out of all recognition from where it came from. The "all new A91" engine will carry over parts from previous engines for the very reasons you highlight - reliability and cost. Also to meet evolving emissions and consumption legislation/targets. The original engine blew up quite a lot when first used for motor sport and had appalling fuel economy. It was the ongoing development that made it a great series of engines and the reality is it was a series of engines based on the same initial block that was evolved over time to give it the reliability and tune-ability that we now take for granted. I guess Marketing had had all they could out of the link with the race engine and the view moving to DFI plus variable turbine geometry broke what ever tenuous link there was left. So we start with a new series of engine and see if over the years they can successfully improve it and prove it under race conditions. It always takes time and effort and often going back to start again. I see in an ad in one of the magazine though that a tuner has 650hp out of the "new" engine, no doubt with upgraded parts but ti shows early potential already. But to support what you were saying Alex, a lot of work is required if the new engine are to get a reputation any where near that of the outgoing engines. Also as they say Power gives you your top speed but its torque that wins races. With increasing congestion, lower speed limits more strictly enforced and pressure on emissions and fuel economy it does suggest a lower limit coming on a usable sports cars power with a focus perhaps back to making them lighter and giving them a big chunky torque plateau throughout the rev range - albeit the racers might argue they want a torque curve increasing as you go up the revs as it makes the car feel more race car like.
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