A Public Thank you to Greg Brown for the GT rods and the help!
#32
Three Wheelin'
PS How many sets you do wanne buy ? .. we have them in hundreds for a realy cheap bargain...
look, i'm not give up my idea... those rods are junk !. No more. Hope Greg Brown chime in for a explication.
PS just hope we can post here our honest experience. if not.... Rennlist.
#33
Former Sponsor
This is how ugly rumors get started...I have a friend that says....
So, let me understand this line of thought: Porsche, for some reason, creates a custom, weaker rod for their higher rpm/higher output engines....while they still have the stronger rods on the shelf to put in the lower output engines? Does anyone out there think this is totally absurd, besides me? They contract with a company to build a weaker rod because they just want to spend more money, instead of using the stronger rod, they already have on the shelf?
Any rod that quits turning on the crankshaft is going to break...no matter who made it and what material it is made from. If the rod starts to stick and becomes hard to rotate on the crank, it is going to break, as the engine rotates...pretty much pure physics. I'd guess that this is the problem that the 944 guys had...since those engines destroy rod bearings at an incredible rate.
928 rods and 944 rods are dimensionally the same, except the 944 versions are wider on the "big" end.
So, let me understand this line of thought: Porsche, for some reason, creates a custom, weaker rod for their higher rpm/higher output engines....while they still have the stronger rods on the shelf to put in the lower output engines? Does anyone out there think this is totally absurd, besides me? They contract with a company to build a weaker rod because they just want to spend more money, instead of using the stronger rod, they already have on the shelf?
Any rod that quits turning on the crankshaft is going to break...no matter who made it and what material it is made from. If the rod starts to stick and becomes hard to rotate on the crank, it is going to break, as the engine rotates...pretty much pure physics. I'd guess that this is the problem that the 944 guys had...since those engines destroy rod bearings at an incredible rate.
928 rods and 944 rods are dimensionally the same, except the 944 versions are wider on the "big" end.
#34
Three Wheelin'
This is how ugly rumors get started...I have a friend that says....
So, let me understand this line of thought: Porsche, for some reason, creates a custom, weaker rod for their higher rpm/higher output engines....while they still have the stronger rods on the shelf to put in the lower output engines? Does anyone out there think this is totally absurd, besides me? They contract with a company to build a weaker rod because they just want to spend more money, instead of using the stronger rod, they already have on the shelf?
Any rod that quits turning on the crankshaft is going to break...no matter who made it and what material it is made from. If the rod starts to stick and becomes hard to rotate on the crank, it is going to break, as the engine rotates...pretty much pure physics. I'd guess that this is the problem that the 944 guys had...since those engines destroy rod bearings at an incredible rate.
928 rods and 944 rods are dimensionally the same, except the 944 versions are wider on the "big" end.
So, let me understand this line of thought: Porsche, for some reason, creates a custom, weaker rod for their higher rpm/higher output engines....while they still have the stronger rods on the shelf to put in the lower output engines? Does anyone out there think this is totally absurd, besides me? They contract with a company to build a weaker rod because they just want to spend more money, instead of using the stronger rod, they already have on the shelf?
Any rod that quits turning on the crankshaft is going to break...no matter who made it and what material it is made from. If the rod starts to stick and becomes hard to rotate on the crank, it is going to break, as the engine rotates...pretty much pure physics. I'd guess that this is the problem that the 944 guys had...since those engines destroy rod bearings at an incredible rate.
928 rods and 944 rods are dimensionally the same, except the 944 versions are wider on the "big" end.
#35
Nordschleife Master
This is an extremely interesting topic, especially since I picked up 8 forged 601g rods from the post office today. I have so many questions and no answers.
(1) When we talk about strong rods, what do we mean? Ability to hold inertial loads or ability to hold power loads? Are we holding the piston weight constant and if so, what piston weight?
I am thinking, possibly incorrectly, that if the pistons are very light then a lighter and less sturdy rod has the advantage, whereas if the piston is heavy the heavier and sturdier rod has the advantage? Am I misguided?
(2) Has anybody ever actually broken an S4 or GT rod without something else breaking first?
Rod bearing failure will break a rod, I would second with my little knowledge. Piston breaking and seizing will break a rod. Hydrolocking will definitely break a rod. Dropping a valve will break a rod. Sure. But has anyone ever broken or bent an S4 or GT rod because of power or revs BEFORE anything else breaks first?
To an inexperienced layman like me, these are all nearly indestructable rods within the standard operating rpm ranges.
(1) When we talk about strong rods, what do we mean? Ability to hold inertial loads or ability to hold power loads? Are we holding the piston weight constant and if so, what piston weight?
I am thinking, possibly incorrectly, that if the pistons are very light then a lighter and less sturdy rod has the advantage, whereas if the piston is heavy the heavier and sturdier rod has the advantage? Am I misguided?
(2) Has anybody ever actually broken an S4 or GT rod without something else breaking first?
Rod bearing failure will break a rod, I would second with my little knowledge. Piston breaking and seizing will break a rod. Hydrolocking will definitely break a rod. Dropping a valve will break a rod. Sure. But has anyone ever broken or bent an S4 or GT rod because of power or revs BEFORE anything else breaks first?
To an inexperienced layman like me, these are all nearly indestructable rods within the standard operating rpm ranges.
#36
Rest in Peace
Rennlist Member
Rennlist Member
Thread Starter
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
we are , no question about the wekest rods............
PS How many sets you do wanne buy ? .. we have them in hundreds for a realy cheap bargain...
look, i'm not give up my idea... those rods are junk !. No more. Hope Greg Brown chime in for a explication.
PS just hope we can post here our honest experience. if not.... Rennlist.
PS How many sets you do wanne buy ? .. we have them in hundreds for a realy cheap bargain...
look, i'm not give up my idea... those rods are junk !. No more. Hope Greg Brown chime in for a explication.
PS just hope we can post here our honest experience. if not.... Rennlist.
I still not sure if you are kidding or not.
You have been asked by two people to back up your claim of them being the weakest rods Porsche ever made.
You say you have prof, well we would like to see it or hear about it.
#37
Rest in Peace
Rennlist Member
Rennlist Member
Thread Starter
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
This is an extremely interesting topic, especially since I picked up 8 forged 601g rods from the post office today. I have so many questions and no answers.
(1) When we talk about strong rods, what do we mean? Ability to hold inertial loads or ability to hold power loads? Are we holding the piston weight constant and if so, what piston weight?
I am thinking, possibly incorrectly, that if the pistons are very light then a lighter and less sturdy rod has the advantage, whereas if the piston is heavy the heavier and sturdier rod has the advantage? Am I misguided?
(2) Has anybody ever actually broken an S4 or GT rod without something else breaking first?
Rod bearing failure will break a rod, I would second with my little knowledge. Piston breaking and seizing will break a rod. Hydrolocking will definitely break a rod. Dropping a valve will break a rod. Sure. But has anyone ever broken or bent an S4 or GT rod because of power or revs BEFORE anything else breaks first?
To an inexperienced layman like me, these are all nearly indestructable rods within the standard operating rpm ranges.
(1) When we talk about strong rods, what do we mean? Ability to hold inertial loads or ability to hold power loads? Are we holding the piston weight constant and if so, what piston weight?
I am thinking, possibly incorrectly, that if the pistons are very light then a lighter and less sturdy rod has the advantage, whereas if the piston is heavy the heavier and sturdier rod has the advantage? Am I misguided?
(2) Has anybody ever actually broken an S4 or GT rod without something else breaking first?
Rod bearing failure will break a rod, I would second with my little knowledge. Piston breaking and seizing will break a rod. Hydrolocking will definitely break a rod. Dropping a valve will break a rod. Sure. But has anyone ever broken or bent an S4 or GT rod because of power or revs BEFORE anything else breaks first?
To an inexperienced layman like me, these are all nearly indestructable rods within the standard operating rpm ranges.
I went through a ford 302 once, that the rod had broken (bent)with out any evidence of a bearing failure, but it was running a lot of N2o.
#38
Nordschleife Master
I have dropped a few valve heads in my time, never broke a rod, damn sure did not do the piston, head or cylinders much good though. I went through a ford 302 once, that the rod had broken (bent)with out any evidence of a bearing failure, but it was running a lot of N2o.
I have been told that the SBC etc. rods are not nearly as strong as 928 rods. I have also been told that the journal diameter is larger with 928 and that 928 rods were the pride and joy of Porsche as the first production PPF rods that they totally overbuilt to be sure.
#39
Three Wheelin'
Norbert
#40
Rest in Peace
Rennlist Member
Rennlist Member
Thread Starter
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
Not every dropped valve breaks a rod, but sometimes they do. I've read so on the internet! ;-)
I have been told that the SBC etc. rods are not nearly as strong as 928 rods. I have also been told that the journal diameter is larger with 928 and that 928 rods were the pride and joy of Porsche as the first production PPF rods that they totally overbuilt to be sure.
I have been told that the SBC etc. rods are not nearly as strong as 928 rods. I have also been told that the journal diameter is larger with 928 and that 928 rods were the pride and joy of Porsche as the first production PPF rods that they totally overbuilt to be sure.
I swear, I think at some point I have broken just about every thing you can break in a engine, I stay away from the blue bottles now.
#41
Rest in Peace
Rennlist Member
Rennlist Member
Thread Starter
Join Date: May 2006
Location: Bird lover in Sharpsburg
Posts: 9,903
Likes: 0
Received 2 Likes
on
2 Posts
your signature doesn't afraid me Greg, just big talk. You wanne proof ? Whahahahaha, i don't gonne give it time. Did you ask proof to everybody cheering you up ??????? my god, such forum ignorence are so attemptive to follow by a noob... sorry again man, this is the way i feel.
Norbert
Norbert
Were cool
PS, I would never try to make anyone afraid over the internet, not my style.
#42
Three Wheelin'
i can give you a second opion on those weak rods from a wurthshipmember ever... ( sorry for spelling ) .... don't think i'm alone ....
please don't ask me details, this is MY opion. Norbert
#43
Addict
Rennlist Member
Rennlist Member
Join Date: Oct 2003
Location: Gone. On the Open Road
Posts: 16,442
Received 1,609 Likes
on
1,050 Posts
WTF?
#44
Former Sponsor
Norbert:
We just need more information. This is not a debate and no one needs to get angry. No one knows all, and we are all trying to learn. If these rods are indeed, Porsche junk, we just need to know. Perhaps you can get some details of what makes them weak and how they failed? That would help us all.
I have nothing technical that proves they are strong...I've never seen or had one fail. I just assumed that if Porsche made them for, and put them in, the higher performance engines, that they would be stronger. If wrong, that's OK...I've been wrong before....and so has Porsche!
See what you can find out and share it with us, please.
Everybody: Let's all be cool and get to the bottom of this...and see what we can learn. No emotion/opinions...let's be technical.
greg brown
We just need more information. This is not a debate and no one needs to get angry. No one knows all, and we are all trying to learn. If these rods are indeed, Porsche junk, we just need to know. Perhaps you can get some details of what makes them weak and how they failed? That would help us all.
I have nothing technical that proves they are strong...I've never seen or had one fail. I just assumed that if Porsche made them for, and put them in, the higher performance engines, that they would be stronger. If wrong, that's OK...I've been wrong before....and so has Porsche!
See what you can find out and share it with us, please.
Everybody: Let's all be cool and get to the bottom of this...and see what we can learn. No emotion/opinions...let's be technical.
greg brown
#45
Rennlist Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Greg,
Well said.
One more idea to add to help add clarity to this discussion. It is a no-brainer to say there are stronger lighter faster aftermarket rods available, just as with everything. But, I for one would like to hear more about the specific 928 factory rods I thought we are/were discussing.
Well said.
One more idea to add to help add clarity to this discussion. It is a no-brainer to say there are stronger lighter faster aftermarket rods available, just as with everything. But, I for one would like to hear more about the specific 928 factory rods I thought we are/were discussing.
__________________
David Roberts
2010 Jaguar XKR Coupe - 510HP Stock - Liquid Silver Metallic
928 Owners Club Co-Founder
Rennlist 928 Forum Main Sponsor
www.928gt.com
928 Specialists on Facebook - 928Specialists
Sharks in the Mountains on Facebook - 928SITM
David Roberts
2010 Jaguar XKR Coupe - 510HP Stock - Liquid Silver Metallic
928 Owners Club Co-Founder
Rennlist 928 Forum Main Sponsor
www.928gt.com
928 Specialists on Facebook - 928Specialists
Sharks in the Mountains on Facebook - 928SITM