Hi,

I know I am not revving high enough. When I start the car cold, I try not to rev beyond 3,500 RPM before shifting. By the time the car warms ups, I'm on the freeway, 80 mph in 6th gear is like 2,600 RPM. I didn't feel like down shifting to 3rd just to get the revs high for high revving sake.

In normal town driving, I'd nromally shift at roughly 4,500 RPM Am I mistreating my car (by not running high enough revs.)? When do you guys rev high during street driving, and at what RPMs?

CP

 

4500rpm in ton i good. occasionally i go up to 6000+

 

Italian tune up = good

 

My car is a strictley pleasure driver so it does not get driven daily. I always get up to near redline everytime i take it out. Or course, I allow the oil to heat up first. On the highway try going in and out of rest areas. I know you don't have toll booths in Cal. (they provide a great oppurtunity to wind through the gears.) From everything I have read the cars likes high revs and it can cause carbon buildup by "lugging" the car. Besides if it was only safe to go to 5000 they would have put the redline there.

Also I hardly ever find myself in 6th gear.

 

When I tell my wife to take the porsche she tells me I have too many rules. The number one rule is "don't lug the engine" I hear her quizing her friend as to what the term "lugging the engine" means. Makes me laugh everytime I hear her quiz someone because when they say "I have no idea" she always says "exactly". Well suffice it to say that I drive the car between 4-5 k but go closer to redline while going through the gears. I try not to beat the clutch during shifts and a standing start and always wait for that oil guage to get 8:00. During a extended driving I have no problem driving at 3k. I like this question because I am interested in how everyone else drives.

 

After warming up the car for a few minutes I shift around 4-5. I redline once in while. I always try to make a conscious effort not to lug the engine, especially during city driving.

 

7,000 works when you need to get somewhere in a hurry

 

"Lug"? Never heard that term before (I'm in the UK so maybe that explains it).

I shift as high as the road will let me (once she's warm of course). Most of the time I find myself in 2nd - possibly 3rd - on local roads and rarely use 5th/6th on the motorways (70+mph). I like the noise and power delivery so I prefer to "rag" it then "baby" it... it sleeps outside with the animals anyways.. she's no princess!

EDIT: She's still my baby of course! (in case she's able to read!)

 

In the porshe manual it mentions "lugging the engine" (at least the US version)

 

Love those revs, but remember;

Energy Loss (Engine Heat/Wear) = F (Engine RPMs, Friction)

We have also read about SAI and valve guide wear on this thread, haven't we?

Have Fun
Loren
'88 3.2

 

In my 964 I tell anyone who asks (and they do surprisingly) that in normal driving I shift around 4k and cruise around 3k. My car is a weekend/track car though so I hit 6,800 almost every time I drive it. The track also keeps the carbon low/gone. My mechanic says most of the engines he sees in the best shape are driven on the track.

As far as temp. goes, I have a problem of when I am cruising for a while my gauge will go from 8:00 (only see 9:00 on the track, or if it idles too long) down to say 6:00, even after running for hours. It is fustrating not being able to rev it up after driving it for hours because the temp. drops. Is this normal? I guess the cool air cools down my air cooled engine.

 

In the manual, it says:

"Never lug the engine in high gear at low speeds. This rule applies all the time, not just during the break-in period", page 12

Lugging is when you are under load, like going up a hill, and at low RPM and you have it in a high gear.

 

Hi Pong,

When cruising, I'd be around 3200 rpm. When possible or necessary (highway on-ramp, empty roads, etc.), I'd rev it high (5000-6000 rpm). On the track, it's mostly high rpm.

I love the engine roars

 

So I gather that you folks have spurts of high revs while running through the gears. You DO NOT advocate driving at say 5,500 RPM all the time.

I guess that's more of my question, do you drive in lower gears for long distance just so that you can maintain a higher rev for a long period of time?

I read somewhere that when cruising, we should cruise at the lowest rev, i.e. highest gear, possible without 'lugging' the engine.

CP

 

Hi Pin,

Do you ever use your 6th gear?

3,200 rpm in 6th in the RUF is around 92 MPH or so. It's hard to keep my license for long at that rate.

Your 5,000-6,000 RPM, are those your shift points, or sustained run speeds?

CP