Running in advice - what's the truth

[okellyt]

Talking to various people there seems to be a lot of different advice on running in periods for a new 911.

it seems to range from "take it easy for 200 miles to let tyres and breaks bed in and then drive it like you stole it" from one OPC

to "Drive carefull for 3000km don't go over 5000 revs or the world will end" from another

What's the truth to this - my logical brain says their ought to be a gradual build up to peak revs through the gears over time rather than 5000rpm limit one day and 7200 the next?

Any facts/advice out there?

Whats further adding to my confusion is the paperwork for my X51 says take it easy (sub 5,500 revs) for 500km then its OK. So the engine upgrade is run in before the engine is?

 

[YvesD]

can you give us an actual transcript of what your manual says ?, 500km is barely enough to get the clutch, brakes and tyres bedded in !

Golden rule above all else is get that engine hot ( 90 degrees c + ) before extending it, oh and dont labour it either.

Yves

 

[okellyt]

Yves

"Engine run in: Engine speeds greater than 5k rpm are not pemitted over a run of 500Km. The maximum engine output of 381 HP depeds on the total mileage of the engine at the time of the retrofit and is achieved as from a total mileage of approx 10,000 km" - this is a translation from German and from the Porsche internal tehcncial info on the x51 powerkit (don't ask how I got it).

The main mannual for the C2 S kind of says take it easy for 3,000 kilometers but again I wonder if one should be gradually as the miles increase use a higheer rev limit either until the 3000km limit or from the limit - as opoposed to 5krpm lmit one day, red line the next

Good point on the oil temperature - I take it very easy until its up to temp.

 

[Alex Postan]

If you're going to keep it long term, treat it like the valuable jewel it is. If you expect to pass it on soonish, smoke the tyres as you leave the showroom and rely on the rev limiter at all opportunities. After all you've just spent all that money and you ought to enjoy it.[]

 

[okellyt]

ORIGINAL: Alex Postan

If you're going to keep it long term, treat it like the valuable jewel it is. If you expect to pass it on soonish, smoke the tyres as you leave the showroom and rely on the rev limiter at all opportunities. After all you've just spent all that money and you ought to enjoy it.[]

Alex

Problem is I want to do both[8|]

 

[YvesD]

ORIGINAL: okellyt

Yves

"Engine run in: Engine speeds greater than 5k rpm are not pemitted over a run of 500Km. The maximum engine output of 381 HP depeds on the total mileage of the engine at the time of the retrofit and is achieved as from a total mileage of approx 10,000 km" - this is a translation from German and from the Porsche internal tehcncial info on the x51 powerkit (don't ask how I got it).

The main mannual for the C2 S kind of says take it easy for 3,000 kilometers but again I wonder if one should be gradually as the miles increase use a higheer rev limit either until the 3000km limit or from the limit - as opoposed to 5krpm lmit one day, red line the next

Good point on the oil temperature - I take it very easy until its up to temp.

okellyt,

Slightly confused by your situation as your engine has the kit from new does it not ? why then the notes referring to retrofit ?

Yves

 

[okellyt]

Clearly at the time they expected to sell most as a retrofit rather than from new, so hadn't done the paperwork for a running in from new scenario

Hence my original questions as differing advice seems to be coming form differnet soruces.

 

[Dapster]

Engine's are bench tested at max load before being fitted anyway, so I'd concur with the former version of events - take everything easy for 500 - 750 miles and then, once everything is up to temperature, drive it like you stole it. I did that with my old 986 and it was fault free and oil tight for 55k miles....

 

[David W.]

I thought that the running in (ie take it easy) advice was as much for the benifit of the driver as the car!
A guy I know had a brand new RR Sport the day before it snowed the other week, he did £5.5k of damage to the car the second day he owned it [&:]
DW

 

[Alex L]

Recent thread on this over on the Rennteam forum:

http://www.rennteam.com/showflat.php?Cat=0&Number=327843&an=0&page=0&gonew=1#UNREAD

 

[okellyt]

Alex

Thanks

seems to be the same debate - the answer is either baby it or cane it and no definative answer on either side.

Albeit I am sure part of the long running period was to enable thed rivre to get used to the car

with both my boxsters the advice was 200-300 miels to bed in breaks and tyres then go wild, pretty much worked for me 52k in one 27k in another no reals problems relating to either engine

 

[YvesD]

I have done around 500 miles on my powerkit since it was installed last November, not exceeded 5500-6000rpm as yet at at the upper end of that, easing off steadily as the self imposed rev limit approaches.

Given that the OPC probably tested it to max revs and that the advice was because the engine was already 'run in' it didnt need running in again, its probably about time I extended it some more.

Whats the worst that can happen ?, It can blow up and I get a brand new powerkit engine for my trouble !

No big deal then.

Yves

 

[okellyt]

Yves

Go for it! you've exceeded the mileage recoomended on the conversion paperwork,s o there should be no worries there

I am at approx 1000 miles so I'll try and restrain myself for another couple of weeks /800 miles. I have fairly assiduously stayed under 5000 revs only twice creeping to just under 5200, so I might start to relax that to a max of about 5500.

Then once up to 1800 miles give it an extra 500rpm per couple of hundred miles or somthing

Alternatively at 1866 miles, as per manual, I'll give it the full beans and see waht she does!

 

[okellyt]

Just done another couple of hundred miles - now approx 1210 miles. Suddenly theres even more kick around the 3000rpm mark and it lunges noticibly harder forward and revs easier.

Still keeping it to approx 5000rpm max but now doing it more on part throttle, cause it was late, I was tired and some how its much faster than a couple of hundred miles ago.

Maybe there is something in the 1800 mile mollarcy after all.

Yves - on my factory paperwork for the x51 powerkit it also states that it takes approx 10,000km to develop full power, so if its already feeling faster..........[][][]

 

[YvesD]

I was only wondering earlier how you were getting on with the run in.

There's pleanty of torque available low down, I accidentally got the tyres sqealing away from some traffic lights earlier this week on a bone dry road but with slightly too many revs on the dial for pulling away it seems. Took me quite by surprise and felt quite sheepish afterwards !

Thinking about disconnecting the PSE switch this weekend as the sound coming in and out at predetermined revs is a bit odd at times. Someone said elsewhere that if you do this the whole thing sounds different again. Worth a try.

Yves

 

[okellyt]

ORIGINAL: YvesD

Thinking about disconnecting the PSE switch this weekend as the sound coming in and out at predetermined revs is a bit odd at times. Someone said elsewhere that if you do this the whole thing sounds different again. Worth a try.

Yves

Interesting - Let me know how you get on with the exhaust

The torque on the powerkit is definately impressive, even at motorway speeds in 6th (2000rpm-ish) the rate you can drop other cars buzzing you without changing gear is quite astonishing

 

[okellyt]

All

Took beast for run today, co-inciding with rugby and F1 qualfication - now up to 1350 miles just 500 to go before run in complete

Gave it the beans in 1st gear to 5000rpm for the first fime - highly comical, barely had enough time to reach for gearshift and pedal to change up by the time I'd hit 5000rpm - Wickedly fast [][][]

Confirmed that somehow between approx 1000 miles to 1200-ish, in gear seems faster, freer revving. Having to use part throttle a lot more to keep distance to cars in front or keep within running in rev limits.

Sport exhaust's a hoot and an absolute must I think to get most enjoyment. Litmus test was that todays run was stereo free even with the wife in the passenger seat who'd normally insist on some music.

 

[garyw]

So well worth waiting for then Tom [][][]..

Glad the beast is still impressing you..

garyw

 

[okellyt]

ORIGINAL: garyw

So well worth waiting for then Tom [][][]..

Glad the beast is still impressing you..

garyw

Gary thanks,

I know its a little slow for you Turbo guys, as the two of you in front of me demonstrated at the Dine and Drive on a straight out of town. By the time I got to the national limit sign the two of you had dissapeared down a mile straight.......[]

However as a jump up from a Boxster S I could not imagine safely dealing with more power. Of course that is until I get used to driving 911's then it will be a long drawn out battle with the financial controller to release funds for the Turbo with the power upgrade in about 3 years time..........

Meanwhile this'll do nicely

Milbrook on Monday, away at weekend - the Beast should be fully run in for the Journey home Monday afternoon

Roll on the red line[][][]

 

[okellyt]

Milbrook today - Brain reset required . Normal Carerra S is soo much faster than the Boxster S especially once you get to 85 -90 mph+

Chickened it at just under 120 on the bowl, hit some bumps and got uncomfortable witht he kick back and how it unsettled the car. Although limit for the day was 130 so not too bad

On the straight started as a complete wuss but finally got the hang of it, 142 and 146 on final runs - the 142 I lifted off as we were cathcing up with another car doing something strange on the straights

0 -146 in 3/4 mile, thats quick. Mind you as ever the Turbos we noticably faster, even if they didn't sound as good.