I'm wanting to purchase a 2004 Porsche 911 Turbo - 660HP EVOMS GT660. Is the 3.6L engine going to be reliable? Will the transmission and rear end hold up to all this hp?

I'm wanting to purchase a 2004 Porsche 911 Turbo - 660HP EVOMS GT660. Is the 3.6L engine going to be reliable? Will the transmission and rear end hold up to all this hp? Thanks, Rod

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[Casey at Pelican Parts]

I am wondering if there are strengthening mods in the gearbox at that horsepower. I was told that the stock box could do 600..That HP is kind of right at the limit of what I would say is reliable. Keeping up on the oil changes after each track day and looking for metal debris in the gearbox and front diff oil will help you see the problem coming before it becomes an issue. The engine oil consumption is the indicator of engine health on a vehicle like that. Without a doubt I would recommend a pre-purchase inspection that performed a leak down and compression test on all cylinders. The shop I worked at upgraded a 996 to 600 HP and that car still drives around today with the stock gearbox and bottom end, but was responsibly driven and enjoyed.

- Casey

[Matt Monson]

I wouldn't worry about it. Unless the car has been heavily dragged raced it should be fine. That is not even beginning to be stressed on either the engine or gearbox. In the 996tt world you are still in bolt on mods power levels.

Regards,

Matt Monson
Guard Trandmission LLC.