Does anyone know if and how much power a 964 will loose with age?
I know this is dependent on use and millege, but iam thinking is my car down on power?
Has any one dyno run there car? Was it down on the expected standard power?
Did it have more BHP?
Iam thinking about throwing the white flash at a dyno run to see how many pony,s its lost or kept.

 

The problem you will have is that your car was not dynoed on the same dyno when new (or recently). It means that you don't have the baseline. It could be that the dyno you choose may show your engine as having 270hp when new (due to maybe correction error)...then if you did it now it showed 250hp.....and then you would be happy.....for all the wrong reasons
If you looked at horsepower at the wheels only, then you might get closer but tyre sizes etc. will always affect things slightly. IMHO, if your engine is putting out around 210-215rwhp then you are pretty close....but it won't be an exact science by any stretch....

I would probably lean towards not bothering unless you want to modify and then do it as a baseline....if you see what I mean?

 

A friend recently dynoed his 100k mile C2 and got 241bhp totally standard, not bad I thought.

 

How about a 0 - 100 test ?
More fun , less money .

 

Except for that pesky speeding ticket...

 

Sounds a damn fine idea to me. See if you can match these (click on the bottom right corner to scale the image so that you can just about read the figures).

http://www.porsche964.nl/docs/pc-9104-a.jpg

I was surprised to see that they timed a standard C2 at 4.9 for the 0-60 dash.

 

13.5 / 106 = 1/4 mile
0 - 100 = 12.1
2 up + full tank

 

Nobody knows how much as it is totally situation dependent, however, it is CERTAIN that over time they lose some power because the valve seating surfaces and seals wear down, exhaust ports get carbon buildup, injectors clog at different rates and therefore some cylinders are slightly above while some are slightly below lambda, cam lobes wear down, timing chains stretch, etc.

On the upside, worn but not worn-out bearings actually allow slightly more power because there is less friction

 

"it is CERTAIN that over time they lose some power"
Christer might have somehow not .

 

You have no idea where your engine was at its birth, as the "270" was an average target, with + or - 5% being quite normal. So, did yours begin life at 270?...284?.....257?....or something out of spec?

 

All of the 964 motors
were born
above average .

 

Russ

Had a dyno run on my C4 about two years ago, only mod at the time was a g pipe.

Run was 250 bhp

 

OK, its good to get replies but whatever the value you guys got on some dyno run fairly recently does still not have any real baseline to compare to...especially when we are talking flywheel HP. As I said before, at least with RWHP there are less variables, and as I said results in the region of 210-215rwhp would be about right. Incidentally, my 1990 with about 86K miles at the time (3.5 years ago) showed 207rwhp on a dyno before I changed the exhaust, so IMHO mine was probably about 10fwhp down on the original - but again this is of coure purely a guesstimate. Obviosuly a dyno run will at least show whether you are *grossly* down on power, but stick with and ask for rearwheel hp if you decide to go ahead.

 

I've only had one dyno run and prob. wouldn't pay for another unless I thought something was majorly wrong.
I judge the power on my car by how much I smile when out in it and how much twitching I suffer when pushing it!!!

 

My car runs well and goes well, but i was wondering if its as quick as it supposed to be.
I need to go out in another 964 to compare.