991.2 GT3 sell now or keep dilemma

[Melvynr]

Cheib said:

Pretty sure they don’t, manual tells you to keep it below 4k rpm. It’s not just the engine you’re running in, gearbox, brakes etc all benefit from running in. In the case of PCCB’s they definitely need bedding in.

I cannot find anything in my manual that even relates to running in, I do find that strange which made me contact Porsche UK , who came back and stated the engine did not require a break in.
I take your point about the CCB, they had a rock hard pedal and skipped over a halt sign, 2-bed ins and they are perfect.

[Melvynr]

Porsche911R said:

All engines are better run in right, other wise they can feel tight or use oil.

Not many people know how to run an engine in though, I use to have all my dads company cars, they all went over the clock speedo, he was the master and I do the same.

Non of this 4K limit and no lugging etc etc. But a well run in engine will be a faster unit for sure.

Never bought the car new, so thought I would check on the run-in procedure, brakes had never been used in anger.I run my engines in quite hard as well.

[hunter 66]

Ran mine in .... on a run down to race at Le Mans , did not use full revs until 1,500 miles , not a big deal and after 9k miles only used half a pint of oil ...... yes the race car uses a pint every hour running but that is another story . Yes I know many who went straight from pick up to a track day so no issue , but had fair few Flat 6 's let go on me so a bit cautious .It is only the road car anyway

[Yellow491]

hunter 66 said:

Ran mine in .... on a run down to race at Le Mans , did not use full revs until 1,500 miles , not a big deal and after 9k miles only used half a pint of oil ...... yes the race car uses a pint every hour running but that is another story . Yes I know many who went straight from pick up to a track day so no issue , but had fair few Flat 6 's let go on me so a bit cautious .It is only the road car anyway

Always run them in mate,and change oil.
I thought your old race engine had a oil tank the size of the fuel tank

[Spyder75]

Cheib said:

Melvynr said:

I don't get this running in properly malarky, GT engines are pre ran in, Porsche will tell you to take it to a track with delivery miles.

Pretty sure they don’t, manual tells you to keep it below 4k rpm. It’s not just the engine you’re running in, gearbox, brakes etc all benefit from running in. In the case of PCCB’s they definitely need bedding in.

.3 RS running in was 1500kms at max 7k.

[RoamingBull]

May know of a 18 Black, yellow stitching,CS,PCCB’s etc. Available soon.

[CorrosionInhibitor]

fridaypassion said:

You might have missed my earlier reply but did you buy that from Octane collection? If so you beat me to it. Absolutely perfect car if you are ever selling it let me know!

Sorry my heads fried with too much middle eastern sun, but yeah I did and they are the most professional outfit I`ve dealt with, no hassle or sales patter just straight up. Lucas was superb.

Yeah its pretty much a new car and perfect spec , albeit without carbon interior, 918 bucket seats and leather dash that you must have according to folk on here lol.
Take care..

[fridaypassion]

CorrosionInhibitor said:

Sorry my heads fried with too much middle eastern sun, but yeah I did and they are the most professional outfit I`ve dealt with, no hassle or sales patter just straight up. Lucas was superb.

Yeah its pretty much a new car and perfect spec , albeit without carbon interior, 918 bucket seats and leather dash that you must have according to folk on here lol.
Take care..

Yeah the seats were perhaps a bit of a shame not to be the full ones but the dash looks good. It's the colour that does it. There's a guy up here got one for sale almost the same but wants 30k more. It was a very well priced car that one I just couldn't move quickly enough on it unfortunately.

[av185]

Cheib said:

Pretty sure they don’t, manual tells you to keep it below 4k rpm. It’s not just the engine you’re running in, gearbox, brakes etc all benefit from running in. In the case of PCCB’s they definitely need bedding in.

This is true.

As an example in 2003 both my cousin and I ordered new e46 M3 manuals. His was Topaz blue mine Estoril.

His was used mainly for the office commute 3miles there 3 miles back. Car never got properly warmed up especially in the winter.

Mine was used for weekend blasts long runs and road trips mainly Lakes Scotland.

The difference between the two cars was incredible despite us having the same driving style and both using Shell premium fuel.

His engine was far less sweet and the gearchange baulky at best. His car also developed transmission problems and diff noise in a couple of years.

Coincidence perhaps but I doubt it.

Edited by av185 on Saturday 22 February 07:09

[Cheib]

I followed the run in procedure in this thread on Rennlist which someone transcribed a presentation from Andrea Preuninger....after that I took mine to RPM Technik for an oil change.

https://rennlist.com/forums/991-gt3-gt3rs-and-911r...

Also found this pic on Rennlist....haven’t looked in my manual. For me it’s just common sense you bed in mechanical components sympathetically. Especially if you intend keep a car a long time like I do

[Koln-RS]

The subject of ‘running-in’ is a minefield of different views, and there seems to be no conclusive answer, depending on whether you want an engine that, supposedly, lasts a long time, or, as in racing, produces the best performance.

[franki68]

I don’t think we were talking about running in,more about how an engine ‘loosens’ up with miles .

[Geneve]

I think the debate is to do with bore glazing and poor ring sealing, which can be caused by too much light running during the ‘break-in’ period.
I’m mechanically sympathetic, but having spent a lot of time discussing this with engine builders (aviation and racing) it’s amazing how many advocate a fairly aggressive running-in procedure.

[CorrosionInhibitor]

fridaypassion said:

Yeah the seats were perhaps a bit of a shame not to be the full ones but the dash looks good. It's the colour that does it. There's a guy up here got one for sale almost the same but wants 30k more. It was a very well priced car that one I just couldn't move quickly enough on it unfortunately.

I actually wanted and prefer the Sports Buckets anyhow.
The colour is superb and suits the decals imo.
Buyers market and buying first / second week in jan with no trade in helps

[Taffy66]

Interesting that Porsche totally revised their running in procedure for the latest 991.2GT3 RS..Keep it under 7k revs for the first 1500km(930 miles) rather than under 4.5k revs for the first 3000km(1895 miles) for my old 991.2GT3..
I wonder why.?

[isaldiri]

Geneve said:

I think the debate is to do with bore glazing and poor ring sealing, which can be caused by too much light running during the ‘break-in’ period.
I’m mechanically sympathetic, but having spent a lot of time discussing this with engine builders (aviation and racing) it’s amazing how many advocate a fairly aggressive running-in procedure.

Tbh most people will never keep their cars long enough or do enough mileage for it to matter. As long as the engine is fully warmed up it's fair game after that imo. the engine has likely bounced off the limiter on the production line prior to being installed anyway....

[Melvynr]

Makes me wonder how "Flippers" and 2,3,4 owner cars under 4k miles have been treated as far as run-in is concerned, I cannot see any of them wanting to pick up a tab for oil and filter changes. Gives confidence when Porsche say the 991.2 does not require one as per mail below.


Thank you for your email.

I have liaised with the Technical Department here at Porsche Cars Great Britain regarding your service query.

I can confirm the Porsche 991.2 GT3 does need to be serviced every 12,000 miles or 2 years whichever occurs first and the Porsche 991.2 GT3 doesn’t require a run-in service.

To book your Porsche 991.2 GT3 for a service and for more information, please contact your local or preferred Porsche Centre. Please click on the following website link to find your local or preferred Porsche Centre: https://www.porsche.com/uk/dealersearch/

[browngt3]

I followed the handbook procedure for running in. However, I did make an early oil change at 1k miles. We debated this at length on PH at the time and many considered this a wise precaution. As I understand it a new engine will have a lot of metallic particles in the oil so fresh oil would seem a good idea. Maybe it doesn't make that much difference but come resale time that early oil change shows you care

[Yellow491]

All engines need a run in/bed in period.
Piston Rings on my race engines we rev quite high with not a lot of load on new build start up,and use mineral oil for the rings to bed as best as possible,then change to synthetic best oil after a couple of hours running.

Porsche say on the 2001 gt3rs race engine to run for 200km,then recheck valve clearance.

Modern production standards/tolerances means the engines bed in much quicker,porsche do not run in standard production engines any more on dynos,only sample in production,they have not done for years,just a drive around the factory and parked for distribution.

[Digga]

Geneve said:

I think the debate is to do with bore glazing and poor ring sealing, which can be caused by too much light running during the ‘break-in’ period.
I’m mechanically sympathetic, but having spent a lot of time discussing this with engine builders (aviation and racing) it’s amazing how many advocate a fairly aggressive running-in procedure.

I was told similar when I ran TVRs. Running in was not only about not exceeding the Rev limits initially, but also about not lugging the engine (too low revs in too high a gear). The advice also was, once warmed, to put some load on. After the initial period, once full revs could be used, it was suggested that once the engine was warmed, on a longer run, you should try to run it up to the limit.

However, my hunch is the Porsche GT engines have, for some years, been built to considerably higher tolerances and standards that the venerable Rover V8 block.