Gen 2 9A1 Bore scoring - smoking Gun Article
02-14-2019, 12:10 PM
#16
Three Wheelin'
02-14-2019, 12:51 PM
#17
Former Vendor
See guys. I always get made out to be the fear monger... What creates the downhill spiral for engines, and reputations are articles like this. Not saying it's a bad article, but when these engines end up with a bad reputation, you can remember this article, and the fact that I did my part not to create the downhill spiral.
I do find the timing of this, and some of the points made in the article (not quoted by Baz) to be very ironic in this article in the way they align with what I have been saying for several years.
I have a decade vested in 9a1 development as of today. It will take several more years before we have certain answers for issues regarding these engines. We have only seen a big jump in demand for 9a1 work in the last 3 of those years, with the biggest jump in the last 12 months.
Knowing this would happen is why we started development when the engines were new. We may not have all the answers about why things happen in factory engines, but we do know how to solve them, and create an engine that can be resurrected to live again with certainty, not depending on the factory to do so.
I do find the timing of this, and some of the points made in the article (not quoted by Baz) to be very ironic in this article in the way they align with what I have been saying for several years.
I have a decade vested in 9a1 development as of today. It will take several more years before we have certain answers for issues regarding these engines. We have only seen a big jump in demand for 9a1 work in the last 3 of those years, with the biggest jump in the last 12 months.
Knowing this would happen is why we started development when the engines were new. We may not have all the answers about why things happen in factory engines, but we do know how to solve them, and create an engine that can be resurrected to live again with certainty, not depending on the factory to do so.
02-14-2019, 01:14 PM
#18
Okay, so if it's an injector issue (ethanol fuel, really)...what's the preventative maintenance? New injectors every...50,000 miles? How big of a job is that, time/skill/$$$?
02-14-2019, 01:24 PM
#19
Former Vendor
point all the blame at ethanol. I was one of them, until l learned more about the additive packages in fuels.
The fuel changes every few months, and over the last 5 years it has changed a ton. Carbureted engine’s here want main jets 2 sizes larger than 5 years ago for the same AFR. I see different colors on the backside of exhaust valves and inside ports.. You name it. Last year we happened upon a fuel that increased oil consumption in the Driven Oil 986 Boxster by 30% over any other fuel that was ran.
Its all a mystery.
The injectors don’t age with miles as much as time in service. The wise directive can be published once we have a clear indication of how much time in service an injector needs before it is suspect. Today very few things we recommend for service occur in miles, its usually time. The injector is in service even if the engine isn’t running.
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Dmpaa (06-09-2020)
02-14-2019, 02:15 PM
#20
People are quick to
point all the blame at ethanol. I was one of them, until l learned more about the additive packages in fuels.
The fuel changes every few months, and over the last 5 years it has changed a ton. Carbureted engine’s here want main jets 2 sizes larger than 5 years ago for the same AFR. I see different colors on the backside of exhaust valves and inside ports.. You name it. Last year we happened upon a fuel that increased oil consumption in the Driven Oil 986 Boxster by 30% over any other fuel that was ran.
Its all a mystery.
The injectors don’t age with miles as much as time in service. The wise directive can be published once we have a clear indication of how much time in service an injector needs before it is suspect. Today very few things we recommend for service occur in miles, its usually time. The injector is in service even if the engine isn’t running.
Ya'll should subscribe to his channel. I needed a good laugh today.https://www.youtube.com/c/Rennvision...nowledgeGruppe
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dadster (04-06-2023)
02-14-2019, 05:08 PM
#21
I find this thread amusing. The incidence rate of any engine issues with 997.2s is incredibly low. Marketing is one thing but falling for it is another.
In extreme cold climates where the car is going through starts in extreme cold, I could see the potential issue building over time. Even then, there are a lot of 997.2s being driven in very cold climates and seem to be okay.
I don't drive my car in the winter at all (because of road salt and road clearing issues) but even if I did, I wouldn't lose sleep over any of this.
Every car type/brand out there has some failure rate. It just has to be within an acceptable level to not bother worrying about. The 997.2 engine is clearly in that category given the number of 100K+ mileage cars out there on the road and the extremely limited frequency of issues that pop up on very vocal forums.
In extreme cold climates where the car is going through starts in extreme cold, I could see the potential issue building over time. Even then, there are a lot of 997.2s being driven in very cold climates and seem to be okay.
I don't drive my car in the winter at all (because of road salt and road clearing issues) but even if I did, I wouldn't lose sleep over any of this.
Every car type/brand out there has some failure rate. It just has to be within an acceptable level to not bother worrying about. The 997.2 engine is clearly in that category given the number of 100K+ mileage cars out there on the road and the extremely limited frequency of issues that pop up on very vocal forums.
02-16-2019, 03:58 PM
#22
Advanced
I have a decade vested in 9a1 development as of today. It will take several more years before we have certain answers for issues regarding these engines. We have only seen a big jump in demand for 9a1 work in the last 3 of those years, with the biggest jump in the last 12 months.
For the rest of us, I would think these cases are falling into an acceptable failure rate of high performance sport car that I would not loose sleep over it. Take these expert advice, whether it's %100 correct or not, to minimize chances it would happen to our beloved car. All the Best. Arrgg, can't wait until snow melt so I can take the Porsche out!
02-16-2019, 04:05 PM
#23
Advanced
Every car type/brand out there has some failure rate. It just has to be within an acceptable level to not bother worrying about. The 997.2 engine is clearly in that category given the number of 100K+ mileage cars out there on the road and the extremely limited frequency of issues that pop up on very vocal forums.
02-16-2019, 05:22 PM
#24
Nordschleife Master
No doubt today's fuels are nasty. I have long been using Stabil 360 Protection (a bit less than 4oz/tank at full fill up).
Note: not to be confused with regular StaBil.
Note: not to be confused with regular StaBil.
02-16-2019, 05:50 PM
#25
Advanced
No doubt today's fuels are nasty. I have long been using Stabil 360 Protection (a bit less than 4oz/tank at full fill up).
Note: not to be confused with regular StaBil.
Note: not to be confused with regular StaBil.
02-16-2019, 05:53 PM
#26
Nordschleife Master
Yep. Depend on where you buy your gas from. My BOAT (Bring On Another Thousand) engine is newer. It should immune to ethanol added regular fuel. My boat mechanic told me to use Shell V-Power Gold fuel as it has no ethanol added and Nitrogen infused that help keep engine clean. It's not that I need higher octane but I need quality gas with no ethanol added for my boat engine and my Porsche to last.
02-16-2019, 08:51 PM
#27
RL Community Team
Rennlist Member
Rennlist Member
No doubt today's fuels are nasty. I have long been using Stabil 360 Protection (a bit less than 4oz/tank at full fill up).
Note: not to be confused with regular StaBil.
Note: not to be confused with regular StaBil.
The 914 with dual carbs gets Driven Carb Defender and the 928 gets 1/3 bottle of SeaFoam with each tank as it's also a lubricant for the mechanical fuel distributor that's part of it's K-Jet system.
