Notices
997 Forum 2005-2012
Sponsored by:
Sponsored by:

Over Rev Report Help

Thread Tools
 
Search this Thread
 
Old Jun 7, 2019 | 03:40 PM
  #1  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default Over Rev Report Help

Hi all, I'm getting a PPI done on a 2009 C2 that I'm trying to buy. The indy shop sent me this report which looks good I think??? Just looking for some advice.

https://rennlist.com/forums/attachme...1&d=1559932751
Attached Files
File Type: pdf
Over rev report.pdf (387.1 KB, 348 views)
Reply
Old Jun 7, 2019 | 04:00 PM
  #2  
jamesinger's Avatar
jamesinger
Drifting
5 Year Member
 
Joined: Apr 2018
Posts: 2,060
Likes: 1,179
From: pasadena
Default

I thought this was a solid tutorial
I personally just did the math myself.
so, I kind of just broke down the math in my head but IDK if this makes sense to others.
I did cross reference the numbers I got and they are consistent.
If this is not a good way of calculating this in line with the @switchcars tutorial, please correct me:
(Calculating the period of TIME that a car has spent at or above the rev limiter).



997 C2S with a rev range 1 threshold of 7200rpm (conservatively):


[How this was calculated:

Number of ignitions / 3 = number of engine revolutions

Number of revolutions / 7200 = minutes spent at limiter

Minutes spent at limiter x 60 = seconds spent at limiter].
Reply
Old Jun 7, 2019 | 04:32 PM
  #3  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default

Originally Posted by jamesinger
I thought this was a solid tutorial
https://www.youtube.com/watch?v=HKgOAWMjZLQ&t=806s
I personally just did the math myself.
so, I kind of just broke down the math in my head but IDK if this makes sense to others.
I did cross reference the numbers I got and they are consistent.
If this is not a good way of calculating this in line with the @switchcars tutorial, please correct me:
(Calculating the period of TIME that a car has spent at or above the rev limiter).



997 C2S with a rev range 1 threshold of 7200rpm (conservatively):


[How this was calculated:

Number of ignitions / 3 = number of engine revolutions

Number of revolutions / 7200 = minutes spent at limiter

Minutes spent at limiter x 60 = seconds spent at limiter].

Thanks for the reply. Just from everything I've been reading, the engine's last over rev at range 4 was almost 450 hrs. ago. Just heard from the indy shop and the borescope came back clean.
Reply
Old Jun 7, 2019 | 05:09 PM
  #4  
8Lug's Avatar
8Lug
Rennlist Member
5 Year Member
 
Joined: Dec 2017
Posts: 1,449
Likes: 1,021
From: Northeast
Default

Looks fine to me. Ranges 1-3 are not a concern and you only have a blip in range 4.
Reply
Old Jun 7, 2019 | 07:37 PM
  #5  
MexicoBlueTurboS's Avatar
MexicoBlueTurboS
Burning Brakes
5 Year Member
 
Joined: Mar 2019
Posts: 1,016
Likes: 248
From: Texas
Default

I see you're in Nova Scotia - you should read the buyers guide (it's a sticky top of the 997 forum) and inquire to others about the best warm up procedure for cold climates.

There is a lot of good help in these forums.

I think you're on the right track with the 3.6
Reply
Old Jun 7, 2019 | 10:22 PM
  #6  
doclouie's Avatar
doclouie
Three Wheelin'
5 Year Member
 
Joined: Mar 2017
Posts: 1,360
Likes: 198
From: Texas
Default

That is a clean rev report. Don’t think twice about it and if there is no bore scoring double win.
Reply
Old Jun 8, 2019 | 01:26 AM
  #7  
sandwedge's Avatar
sandwedge
Rennlist Member
15 Year Member
 
Joined: Apr 2007
Posts: 8,552
Likes: 1,104
From: Florida
Default

Originally Posted by 600V
Hi all, I'm getting a PPI done on a 2009 C2 that I'm trying to buy. The indy shop sent me this report which looks good I think??? Just looking for some advice.

https://rennlist.com/forums/attachme...1&d=1559932751
Looks pretty good. The only reservation I might have is if resale or trade in with a Porsche dealer may be a future consideration. I don't know if this is accurate but I read here or somewhere that Porsche can't CPO a car that has anything in range 4, no matter how small. Blip.....call it what you want but anything registered in range 4 is disqualifying for CPO certification according to what I read. If correct, how much if anything that affects the value of the car can probably be debated forever.
Reply
Old Jun 8, 2019 | 10:32 AM
  #8  
Petza914's Avatar
Petza914
RL Community Team
Rennlist Member
15 Year Member
 
Joined: Oct 2007
Posts: 28,544
Likes: 8,351
From: Clemson, SC
Default

Looks ok to me too. Average speed was 47 mph which means probably a lot of highway mileage. Total mileage divided by total operating hours.

12 hours ago it was being driven spiritedly, but that's OK and the missed shift that caused the range 4 was a few hundred hours ago. If boroscope was clean you're probably good.
Reply
Rennlist Stories

The Best Porsche Posts for Porsche Enthusiasts

story-0

Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

 Verdad Gallardo
story-1

10 Porsche Colors That Have More Personality Than Most People

 Verdad Gallardo
story-2

Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

 Verdad Gallardo
story-3

10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

 Joe Kucinski
story-4

Porsche Shakes Up The Nürburgring Lap Record Table Once Again

 Verdad Gallardo
story-5

6 Ways the Porsche 911 GT3 S/C Redefines Performance

 Joe Kucinski
story-6

10 Wildest Homologation Specials Porsche Ever Sold

 Verdad Gallardo
story-7

Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

 Verdad Gallardo
story-8

10 Porsche Opinions That Can Start a Fight

 Joe Kucinski
story-9

One-Off Porsche 911 S/T Takes Inspiration From Famous '70s Race Car

 Verdad Gallardo
Old Jun 8, 2019 | 10:41 AM
  #9  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default

Originally Posted by Petza914
Looks ok to me too. Average speed was 47 mph which means probably a lot of highway mileage. Total mileage divided by total operating hours.

12 hours ago it was being driven spiritedly, but that's OK and the missed shift that caused the range 4 was a few hundred hours ago. If boroscope was clean you're probably good.
Hey thanks for all the help folks. I found out from the shop that the car was winter driven as well. Still has the winter tires on it actually. Would this also be something to be concerned with? keeping in mind it's a Canadian car so it would have likely been driven in snow.
Reply
Old Jun 8, 2019 | 10:43 AM
  #10  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default

Also heard back from the Indy shop. There is no sign of bore scoring so looks like the engine should be in good shape.
Reply
Old Jun 8, 2019 | 10:46 AM
  #11  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default

Originally Posted by Petza914
Looks ok to me too. Average speed was 47 mph which means probably a lot of highway mileage. Total mileage divided by total operating hours.

12 hours ago it was being driven spiritedly, but that's OK and the missed shift that caused the range 4 was a few hundred hours ago. If boroscope was clean you're probably good.
Thanks, the borescope came back clean
Reply
Old Jun 8, 2019 | 10:47 AM
  #12  
600V's Avatar
600V
Thread Starter
Track Day
 
Joined: May 2019
Posts: 23
Likes: 0
From: Valley, Nova Scotia
Default

Originally Posted by sandwedge
Looks pretty good. The only reservation I might have is if resale or trade in with a Porsche dealer may be a future consideration. I don't know if this is accurate but I read here or somewhere that Porsche can't CPO a car that has anything in range 4, no matter how small. Blip.....call it what you want but anything registered in range 4 is disqualifying for CPO certification according to what I read. If correct, how much if anything that affects the value of the car can probably be debated forever.
If I understand correctly Porsche has "relaxed" their rules on range 4.
Reply
Old Jun 8, 2019 | 11:17 AM
  #13  
Petza914's Avatar
Petza914
RL Community Team
Rennlist Member
15 Year Member
 
Joined: Oct 2007
Posts: 28,544
Likes: 8,351
From: Clemson, SC
Default

Originally Posted by 600V
Hey thanks for all the help folks. I found out from the shop that the car was winter driven as well. Still has the winter tires on it actually. Would this also be something to be concerned with? keeping in mind it's a Canadian car so it would have likely been driven in snow.
Personally, I don't ever want to work on a car again that was driven in the winter where all the fasteners are corroded, rusted in place, snap off, need extracting, etc so it would stop me from buying a particular car, but if you're going to have others do most of your wrenching, it will be their problem, and up in that area, I'd assume they'd be used to it.
Reply
Old Jun 8, 2019 | 01:08 PM
  #14  
MexicoBlueTurboS's Avatar
MexicoBlueTurboS
Burning Brakes
5 Year Member
 
Joined: Mar 2019
Posts: 1,016
Likes: 248
From: Texas
Default

It's amazing how much damage salt and all of the other chemicals used to treat snow can damage a car and how quickly. After looking at the undercarriage of some cars from the snow (and salt) belt, I would never consider any of them. When I went to change the oil on my car the other day, it was nice to see approximately this (previous photo but a little dirtier at this time).

Reply
Old Jun 8, 2019 | 01:10 PM
  #15  
MexicoBlueTurboS's Avatar
MexicoBlueTurboS
Burning Brakes
5 Year Member
 
Joined: Mar 2019
Posts: 1,016
Likes: 248
From: Texas
Default

Originally Posted by Petza914
Average speed was 47 mph which means probably a lot of highway mileage. .
That's a very high avg in my limited experience. Usually under 30 if I recall correctly.
Reply



All times are GMT -3. The time now is 09:42 PM.

story-0
Porsche Reveals Coupe Variant of the Electric Cayenne With a Fresh Look

Slideshow: Porsche's latest electric Cayenne Coupe blends dramatic styling with supercar acceleration, turning the brand's midsize SUV into a 1,139-horsepower flagship.

By Verdad Gallardo | 2026-04-27 19:39:30


VIEW MORE
story-1
10 Porsche Colors That Have More Personality Than Most People

Slideshow: Porsche's wildest paint colors aren't just shades-they're full-blown personalities on four wheels.

By Verdad Gallardo | 2026-04-27 19:38:13


VIEW MORE
story-2
Guntherwerks' Final Speedster Creation Is the Ultimate Porsche Restomod

Slideshow: The last of the Speedsters doesn't just close a chapter, it makes quite the bold, air-cooled statement.

By Verdad Gallardo | 2026-04-22 17:55:04


VIEW MORE
story-3
10 Reasons I Hate Going to the Porsche Dealership (& the 1 Reason I Stay)

Slideshow: Going to a Porsche dealership may not be the dream experience you expect it to be and these are the reasons why.

By Joe Kucinski | 2026-04-21 13:54:19


VIEW MORE
story-4
Porsche Shakes Up The Nürburgring Lap Record Table Once Again

Slideshow: Porsche just proved-again-that precision engineering can outrun brute force at the Nürburgring.

By Verdad Gallardo | 2026-04-18 20:27:02


VIEW MORE
story-5
6 Ways the Porsche 911 GT3 S/C Redefines Performance

Slideshow: Six reasons why you will love the Porsche 911 GT3 S/C and 1 reason you will hate it.

By Joe Kucinski | 2026-04-14 10:21:39


VIEW MORE
story-6
10 Wildest Homologation Specials Porsche Ever Sold

Slideshow: Some of the most desirable Porsche models are those that were sold to the public solely for homologation purposes.

By Verdad Gallardo | 2026-04-08 09:54:26


VIEW MORE
story-7
Super Rare RUF BTR III Comes Out of Hibernation, Looking For a New Home

Slideshow: The lone BTR III-spec Targa features rare RUF engineering with a 430-hp turbo flat-six and fewer than 30 miles since its rebuild.

By Verdad Gallardo | 2026-04-06 20:03:25


VIEW MORE
story-8
10 Porsche Opinions That Can Start a Fight

Slideshow: If you want to start a debate with a Porsche friend, these 10 opinions are a great way to get started.

By Joe Kucinski | 2026-04-02 16:53:02


VIEW MORE
story-9
One-Off Porsche 911 S/T Takes Inspiration From Famous '70s Race Car

Slideshow: A one-off Porsche 911 S/T created through the Sonderwunsch program pays tribute to a little-known 1970s race car from the Camel GT Challenge.

By Verdad Gallardo | 2026-03-30 19:44:11


VIEW MORE