I think I did a mini-money shift, and wondering if I did any damage.

At day two of the Watkins Glen DE, I was reaching for 4th, but got into 2nd instead.

I think I must've known that maybe I screwed up the shift, because I was letting the clutch out much slower than usual. Because I was letting the clutch out much too slowly, I didn't feel the car engine braking very hard, but I saw the tach jump up to around 7500, maybe 7600, I'm not exactly sure.

I didn't get any engine lights, no smoke, and I can't hear any different sounds.

I'm interested to know if there are any opinions as to how "binary" the money shift is. My instructor is of the opinion that if you break something with a mis-shift, you will hear it and know it without any doubt. I'm wondering if I "sort of" broke something.

Since the indicent, I finished the session with no problems. On the drive out on some backroads, I spend a bunch of time in 1st and 2nd at the revlimiter and I couldn't hear anything different.

Anyone have an opinion on the number of RPMs that you need to actually break something on the 3.8L engine?
Presumably, Porsche puts the rev limiter more than 1 RPM below where the engine will fail. So I'm guessing that one can pass the rev limiter briefly by some margin without breaking anything.

Any input appreciated.

 

7600 rpm should not cause any issues at all. Even my 3.4 has seen 7800 many, many times. (deliberately)

 

It's all about whether you trust that you spotted the tach at the high-rev point. If you did, and 7500 or so was the peak, I'm sure you're fine. OTOH, you're racing so it's hard to be sure that you spotted the situation. You could get more peace of mind by having the dealer check the computer and see if you have committed any greater sin.
Sounds like you got lucky.

 

Wouldn't worry too much. Your DME scan will show a high rev, but you can't change that now.

 

er?



Not trying to highjack , but does anyone know if DME shows all the times u hit rev limiter?

 

This guy would know.....after a few conversations with him,you do realize he truley drives the 'beans' out of his car,LOL!

Yup......and the type of over-rev!

 

Oh come on I think you could make it to 8500rpm!

 

Your fine.... I did a money shift once. Had to replace the engine. When you see smoke rising and oil falling you know your done. If you can drive home with no funny sounds coming from your engine your fine. take care and thank your lucky stars. When I'm on track now I'm hyper aware. It can happen to anyone.

 

Yes it does.

 

The DME scan will show you how many times you've gone OVER the rev limiter. I not sure how the rev limiter works on a 911, but you can go over it. I'd have to check that over limit thread again, but I thought valve float started at 9000 RPM or something like that. Might as well check the scan the next time you have the car serviced - although I wouldn't worry about it at this point as someone else has already said- you can't do anything about it now.

 

Is it times you've gone over or drives you've gone over? I was under the impression for some reason that if on one drive you hit the limiter twice, it would still only show one.

 

Don't know about that, but it's a good question. Another question is about the ranges. Obvioulsy you register in Range 1 before Range 2. If you hit Range 2, do you also show an ignition in Range 1? It would seem that they would be cummulative, hence if you go to the higher ranges you also show that it went through the lower range. On your question, I doubt you could bounce past the limiter multiple times and it would only show up once per drive. The DME measures per ignition.

 

I don't know what's in your car, but I'm assuming that that 7800 is past the rev limiter? If so, how are you getting in there? Are you deliverately downshifting and putting the engine at 7800?

And thanks to everyone who replied.

 

You have to override (or fool) the computer's rev limit setting. This is acceleration revs, down downshifting. Pretty safe in a hydraulic lifter engine as, most often, valves will float before something else gives.

 

If you money shifted you'd know immediately! As for rev limiter, if you money shift there is no rev limiter to save you....