Can you over rev a Porsche?
Range #2 over-revs are not OK: these are dangerous and are known as a mechanical over-rev. These occur above and beyond the control of the DME’s rev-limiter. The only way to have a range #2 over rev is to put the car into an incorrect lower gear at high speed and/or a few select very dynamic driving situations.
What is a Porsche over rev report?
Ignitions are the firings of the spark plugs. On the 911 because its a six cylinder 4 stroke engine you get 3 ignitions per 1 revolution. For example in a 997GT3.1 you divide the max rpm limit of 8400rpm with 60 seconds and you get 140 revolutions per second of the engine at redline.
What is over revving?
If an engine goes overspeed, commonly called “over-revving”, damage to the piston and valvetrain may occur when a valve stays open longer than usual. Valve float can possibly result in loss of compression, misfire, or a valve and piston colliding with each other.
What are the most common problems with a Porsche Boxster?
Listed below are Porsche Boxster common mechanical problems with their likely resolutions. These are the most frequent Boxster problems diagnosed by our repair shops over the years. An accurate diagnosis of an issue by a Porsche mechanic typically saves you time and money – see our guide to local independent Porsche repair shops that can help.
Can a Porsche 996 Boxster have IMS failure?
If you own a Porsche 996, Boxster 986 or a very early Boxster 987, Cayman 987 or 3.6 or very early 3.8 997, you are sure to have read some of the horror stories about IMS bearing problems.
What causes oil starvation in a Porsche Boxster?
Oil starvation due to built-in oil sump – The new design of the Boxster’s oil sump had a lower holding capacity, which led to numerous issues. Rear main seal leaks – This was an issue for earlier models and is more of a cosmetic issue than a performance issue. Rod bolt failure – Particularly a problem in high mileage Boxsters that are revved often.
Are there any problems with the 986 Boxster?
The upgraded aos features a doubling in size of capacity for scavenging and is less prone to sucking up oil during high speed cornering. M96 engines fitted to the 986 and 987 Boxster can have issues with a bearing at one end of the engine intermediate shaft. The shaft connects the two ends of the engine timing gear.
Why does my Porsche Boxster have an AOS problem?
The AOS has caused numerous issues on Porsche engines and is an item to be closely monitored. As the membrane in the AOS fails, oil is sucked into the air intake. Initially this can show up as a check engine light for fuel adaptations with oil being deposited on the o2 sensors causing emission faults.
What causes a Porsche Boxster engine to leak?
On the early cars, Porsche also used a center bolt to secure the IMS bearing that was too weak and sometimes snapped. If this bolt breaks, then the intermediate shaft begins to float around in the bottom of the engine, and you can soon experience catastrophic engine failure. This area is also highly prone to leaks.
What happens when you over Rev a Porsche?
Industry experts would suggest a 50 operating hour window of danger after the point of an over rev where chains or associated inter-gear can fail or develop problems leading to costly engine work / engine rebuilds.
The upgraded aos features a doubling in size of capacity for scavenging and is less prone to sucking up oil during high speed cornering. M96 engines fitted to the 986 and 987 Boxster can have issues with a bearing at one end of the engine intermediate shaft. The shaft connects the two ends of the engine timing gear.