Porsche 911 (996.1) GT3 | Spotted
Discussion
Maldini35 said:
Anybody know the rebuild schedule for a Porsche race engine?
Hope this helps.The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
Edited by Slippydiff on Thursday 16th January 17:19
Maldini35 said:
Anybody know the rebuild schedule for a Porsche race engine?
Engine and gearbox rebuild interval for 991 Cup (gen 1) is 40 hours under load which is normally around 4-5k miles of racing. The cost if I remember correctly was around 22,000gbp if nothing serious was damaged.LaurasOtherHalf said:
Sandpit Steve said:
Augustus Windsock said:
As all of the above have said.
But the thing that would worry me, and bother my wallet is summed up this;
“And work out what maintenance is like for a race engine in a road car.”
Well, your average 911 Cup car would have done about a thousand kilometres a season - even the F1 support Cup races are only usually 15 laps, 75km. But the thing that would worry me, and bother my wallet is summed up this;
“And work out what maintenance is like for a race engine in a road car.”
It wouldn’t be an unreasonable assumption that after a couple of thousand clicks it needed some serious stripping down and rebuilding if it’s to stay reliable.
Great project though, and there will be lots of smiles on the face of the new owner.
shalmaneser said:
It's not electric power steering - it's hydraulic power steering that's powered by an electric motor rather than run off the engine.
All the 996 cup cars ran this setup, probably to move the heavy pump from the engine forwards into the luggage compartment thus improving balance and also to de-clutter the engine bay. Also shortens and simplifies the plumbing.
Amusingly it turns out the 'motorsport spec pure Porsche fairy gold dust' pump and reservoir assembly that is £lots from Porsche motorsport is the same as is fitted to the Vauxhall Zafira and is available for £30 off Ebay.
All the 996 cup cars ran this setup, probably to move the heavy pump from the engine forwards into the luggage compartment thus improving balance and also to de-clutter the engine bay. Also shortens and simplifies the plumbing.
Amusingly it turns out the 'motorsport spec pure Porsche fairy gold dust' pump and reservoir assembly that is £lots from Porsche motorsport is the same as is fitted to the Vauxhall Zafira and is available for £30 off Ebay.
shalmaneser said:
It's not electric power steering - it's hydraulic power steering that's powered by an electric motor rather than run off the engine.
PHEW!! For a while I was seriously perplexed about how insane someone would have to be to do all this to a 996 GT3, only to ruin the steering with a horrible EPAS setup!Sandpit Steve said:
Well, your average 911 Cup car would have done about a thousand kilometres a season - even the F1 support Cup races are only usually 15 laps, 75km.
It wouldn’t be an unreasonable assumption that after a couple of thousand clicks it needed some serious stripping down and rebuilding if it’s to stay reliable.
Great project though, and there will be lots of smiles on the face of the new owner.
You can multiply your 1000km by at least five and probably around 10 for a season of Supercup. For a start there are a couple of free practice sessions and a qualifying session during a race weekend, so that tends to add a few km. Then there's pre-season testing, which could add easily 500km a day.It wouldn’t be an unreasonable assumption that after a couple of thousand clicks it needed some serious stripping down and rebuilding if it’s to stay reliable.
Great project though, and there will be lots of smiles on the face of the new owner.
Many, many 997 Cups have run 24 hour races over the years without any reduction in revs - indeed the problem with them, from memory, was that the clutch was only rated for something like 25 or 26 hours so you had to put a new clutch in after qualifying.
The beauty of all the Porsche Cups from the 996 onwards is that they are sold as sprint cars but can comfortably run 24 hour races with barely any modifications - the 996s even had a huge 120 litre fuel tank as standard, I think. There isn't really anything to compare to them in that regard and it's why they have been so incredibly popular over the years.
fblm said:
I've never seen this car in person but if slippydiff's previous cars are anything to go by this will have been engineered and modified right, with an attention to detail bordering on crazy!
Yes, he's definitely done this one right too. My own car was having some chips in the rear bumper done and his was done by the same guy. The bloke who does my ceramic coating and PPF (who comes from the background of paint prep and is OCD about it) has always warned me away from the big, OPC approved bodyshop and told me to use a small indie nearby who, I have to say is excellent. They did the work on this car - top notch.Great thread on the build here: http://911uk.com/viewtopic.php?t=135064&postda...
Slippydiff said:
Hope this helps.
The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
Completely ignore my first comment by the way! Haha! The responses clarifying the 'need' the replace the engine makes perfect sense, and reading what you did, seems like absolutely the best route to go. I've gone from thinking 'why do this to a 996 GT3' to thinking 'this is probably the most desirable 996 GT3 out there'!! Haha! Fair play man - hopefully the money is going to get well spent on the next toy. The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
Edited by Slippydiff on Thursday 16th January 17:19
Slippydiff said:
Maldini35 said:
Anybody know the rebuild schedule for a Porsche race engine?
Hope this helps.The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
Edited by Slippydiff on Thursday 16th January 17:19
The car sounds an absolute belter. Incredible value for money.
Slippydiff said:
Hope this helps.
The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
The 997 Cup engine is effectively a Gen 1 997 GT3 engine with the variable valve timing (Variocam ) removed.
It runs what is effectively a 997 GT3 RS 4.0 inlet manifold/plenum but with a cable throttle rather than a fly by wire throttle.
It runs Alpha N rather than a MAF.
It also utilises heads with large ports (which ended up being used on the 997 GT3 RS 4.0 engines too)
In short it’s simplified, bullet-proof 997 GT3 engine.
It’s designed to produce maximum power at 8400rpm, the engine mapper dialled the rev limiter back to 8100 for longevity.
If the next owner throws fresh oil at it every 5K miles (or less if used predominantly on track) I see no reason why the engine won’t outlast a stock 997 GT3 road engine.
This engine in the car was purchased directly from the Porsche Motorsport department.
Edited by Slippydiff on Thursday 16th January 17:19
Edited by Sandpit Steve on Friday 17th January 14:54
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