What happened here?
Fabricator
Joined: Jan 2004
Posts: 1,322
From: Central Ohio (Hebron) Zephyrhills Fla.
Originally Posted by sleeper7' post='922691' date='Jun 8 2009, 02:32 AM
Lynn,
In the first photo Tweak posted, what caused the "burn" marks on the sides of the rotors? It does not look like carbon build up but rather heat from the combustion camber.
In the first photo Tweak posted, what caused the "burn" marks on the sides of the rotors? It does not look like carbon build up but rather heat from the combustion camber.
Just carbon leaking past the failed side seals.
Lynn E. Hanover
Senior Member
Joined: Jun 2003
Posts: 208
From: San Antonio TX/Okinawa Japan
Here's photos of my last motor with allot of 9000plus rpms shifts and 30psi runs. No carbon/burn marks on the sides. What small amount there is iseven across the hole side of the rotor and does not look like "heat" marks. I run 2 ox of premix. You can see were the side of the rotor was touching the plates from over reving. Motor was used around 8 to 10 month. I would bet over 140 1/4 miles passes. AFR in the 10s most of the time. I spent all my wife's money at the track!
Not disputing about the "bad" porting.. I know I am a nobody and just asking questions. how would carbon get by the side of the rotor and plate? And at the part of the side seal failure. I bet if Tweak would have driven the motor longer, the last remaining good seal would have given away also.
Not disputing about the "bad" porting.. I know I am a nobody and just asking questions. how would carbon get by the side of the rotor and plate? And at the part of the side seal failure. I bet if Tweak would have driven the motor longer, the last remaining good seal would have given away also.
Fabricator
Joined: Jan 2004
Posts: 1,322
From: Central Ohio (Hebron) Zephyrhills Fla.
Originally Posted by sleeper7' post='922726' date='Jun 8 2009, 05:09 PM
Here's photos of my last motor with allot of 9000plus rpms shifts and 30psi runs. No carbon/burn marks on the sides. What small amount there is iseven across the hole side of the rotor and does not look like "heat" marks. I run 2 ox of premix. You can see were the side of the rotor was touching the plates from over reving. Motor was used around 8 to 10 month. I would bet over 140 1/4 miles passes. AFR in the 10s most of the time. I spent all my wife's money at the track!
Not disputing about the "bad" porting.. I know I am a nobody and just asking questions. how would carbon get by the side of the rotor and plate? And at the part of the side seal failure. I bet if Tweak would have driven the motor longer, the last remaining good seal would have given away also.
Not disputing about the "bad" porting.. I know I am a nobody and just asking questions. how would carbon get by the side of the rotor and plate? And at the part of the side seal failure. I bet if Tweak would have driven the motor longer, the last remaining good seal would have given away also.
The carbon staining is adjacent to the failed seals, so that appears to agree with the leaking seal idea.
The blowby is there due to the seal is not working well. The rotor to iron fit is not all that close, so with no seal there will be a leak.
The rotors will rub in any engine that is reved high enough. By removing .008" to .010" from the rotor sides outboard of the oil scraper grooves, the rotor will not touch the irons. I like the extra top oil and the very rich mix for turbo applications.
Lynn E. Hanover
Fabricator
Joined: Jan 2004
Posts: 1,322
From: Central Ohio (Hebron) Zephyrhills Fla.
Originally Posted by RICE RACING' post='923060' date='Jun 16 2009, 06:59 AM
Men with pony tails should stick to biting pillows rather than trying to perform porting work 
Those ports are a total abortion performed by someone with little to no idea of what they are doing.
Lyn explains it well
Those ports are a total abortion performed by someone with little to no idea of what they are doing.
Lyn explains it well
I have read this several times looking for some helpful information, and didn't find any. We wait in respectful silence for the many pictures of what real ports should look like. Our lives will then be complete.
Lynn E. Hanover
I have a pony tail
Junior Member
Joined: Jan 2009
Posts: 7
Originally Posted by Lynn E. Hanover' post='923266' date='Jun 20 2009, 02:02 PM
I have read this several times looking for some helpful information, and didn't find any. We wait in respectful silence for the many pictures of what real ports should look like. Our lives will then be complete.
Lynn E. Hanover
I have a pony tail
Lynn E. Hanover
I have a pony tail
Rice does like to bait people
he does infact make significant tech contributions elsewhere, has given people his measured port timing, and also other descriptors of his ports like opening edge distance to water seal edge for safe corner seal travel etc.
http://riceracing.com.au
from ausrotary tech reference porting thread and later added to his website for all to see
Member
Joined: Oct 2002
Posts: 90
From: Utopia
Originally Posted by Lynn E. Hanover' post='923266' date='Jun 19 2009, 08:02 PM
I have read this several times looking for some helpful information, and didn't find any. We wait in respectful silence for the many pictures of what real ports should look like. Our lives will then be complete.
Lynn E. Hanover
I have a pony tail
Lynn E. Hanover
I have a pony tail
Hopefully you can sleep easy now mate
IF you choose to look deeper you will find "lot's" of engineering information which is unrivaled by anyone else that has taken the time to share end effects and benefits onto a public forum for all to see
Brian sadly is one of those people who shoots off his mouth on MANY TOPICS with zero results to back up the key board typing speed he has. It's all good to type one liners or feed rubbish to people to print in magazines, but when you have no idea it WILL finally catch up with you
I trust there is enough information now shared for you to draw some conclusions as to what my level of offerings are in this topic and no doubt you will make yourself familiar with the reams of quality pertinent information that I have shared free of charge to rotary users the world over in my many years of helping others.
Best Regards.
Senior Member
Joined: Jun 2004
Posts: 524
Pony tailed rotor porters unite!
Some people blow engines up and never figure out why. Their parts end up on eBay.
Some people blow engines up, figure out why, and take steps to prevent it. Their findings end up on rotor forums.
Just think, for every little tech tidbit you read, at least one person found out the expensive way. And for every expensive mistake told about, at least ten people have the opportunity to not make that same mistake.
The engine in my car had seal eating ports in it. They are huge. The PO got fed up and sold the mess at a giant loss. After a few owners, the parts went to me, I saw the obvious porting errors, spent maybe an hour repairing them, and so far it's still running strong.
I have no clue how some people go out and port their engines successfully themselves without knowing what is really going on. Maybe that is why a lot of people get blown engines and never really know why.
Some people blow engines up and never figure out why. Their parts end up on eBay.
Some people blow engines up, figure out why, and take steps to prevent it. Their findings end up on rotor forums.
Just think, for every little tech tidbit you read, at least one person found out the expensive way. And for every expensive mistake told about, at least ten people have the opportunity to not make that same mistake.
The engine in my car had seal eating ports in it. They are huge. The PO got fed up and sold the mess at a giant loss. After a few owners, the parts went to me, I saw the obvious porting errors, spent maybe an hour repairing them, and so far it's still running strong.
