S2000 Under The Hood S2000 Technical and Mechanical discussions.

Even more broken retainers found

Thread Tools
 
Old 11-10-2006, 10:00 AM
  #71  
Administrator


 
krazik's Avatar
 
Join Date: Oct 2000
Location: Santa Cruz, CA, US
Posts: 17,004
Received 6 Likes on 6 Posts
Default

yes but the revlimiter has nothing to do with bent valves. And if you put something with data on the car (like a dl1) you'll find the rev limiter is actually closer to 8900.

To overrev the car enuf to damage your retainers you need to put it in the wrong gear.
Old 11-10-2006, 11:02 AM
  #72  
Registered User
 
BlownAP's Avatar
 
Join Date: Mar 2006
Location: 951
Posts: 3,615
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by krazik,Nov 10 2006, 11:00 AM
yes but the revlimiter has nothing to do with bent valves. And if you put something with data on the car (like a dl1) you'll find the rev limiter is actually closer to 8900.

To overrev the car enuf to damage your retainers you need to put it in the wrong gear.
krazik is correct. it dosent matter where you rev limiter is, the rev limiter is NOT going to protect your engine from a Mechanical over-rev.....
Old 11-10-2006, 12:27 PM
  #73  
Registered User

 
SpitfireS's Avatar
 
Join Date: Jan 2006
Location: 17 ft below sea level.
Posts: 4,949
Likes: 0
Received 21 Likes on 16 Posts
Default

krazik Posted on Nov 10 2006, 06:53 PM
What exactly do you expect this "test" to tell you?
Well.. I did mention in an earlier post in this thread that (most likely during my first track day when I was shifting down to soon without braking enough a.ka "a wrong gear" and I heared the shifter beeper beep continuously on two or three occasions) it played back 9500 rpm so I was kind of worried and wanted to know when the limiter engages according to the shifter beeper high rev memory to give me some idea of how much I mechanicly overreved my engine.
I don't know how accurate the shifer beeper high rev memory is.
I was not counting on the rev limiter to save me on a downshift causing a mechanical overrev, but wanted to know what Honda thinks is save enough and used the only measuring device I have to give me a rough idea.

And I posted my results / findings

Old 11-10-2006, 12:40 PM
  #74  
Registered User
 
mxt_77's Avatar
 
Join Date: Jan 2003
Location: Wylie, TX
Posts: 8,482
Likes: 0
Received 2 Likes on 2 Posts
Default

I'm trying to get a visual of how this works in my head and I have a question...
If your retainers are cracked, it will appear that the valve stem is "sunk in" to them, right? Does that have any actual effect on your valve timing or lift or anything? I'm thinking no, because the rocker arms (or tappets or whatever they're called) contact the end of the valves and the retainer's not involved, but I'm not 100% sure.
Old 11-10-2006, 12:51 PM
  #75  
Administrator


 
krazik's Avatar
 
Join Date: Oct 2000
Location: Santa Cruz, CA, US
Posts: 17,004
Received 6 Likes on 6 Posts
Default

actually no the valve stem doesn't move (unless you bent a valve and it can't close completely).

The keepers are what look to have sunked.

And correct the rocker arms push on the valve stem to open the valves, and the retainers are used (with the spring) to close the valve.
Old 11-10-2006, 12:57 PM
  #76  
Registered User
 
RED MX5's Avatar
 
Join Date: Feb 2004
Location: Dry Branch
Posts: 7,087
Likes: 0
Received 0 Likes on 0 Posts
Default

[QUOTE=SpitfireS,Nov 10 2006, 04:27 PM]Well..
Old 11-10-2006, 01:07 PM
  #77  
Registered User
 
RED MX5's Avatar
 
Join Date: Feb 2004
Location: Dry Branch
Posts: 7,087
Likes: 0
Received 0 Likes on 0 Posts
Default

[QUOTE=mxt_77,Nov 10 2006, 04:40 PM]I'm trying to get a visual of how this works in my head and I have a question...
If your retainers are cracked, it will appear that the valve stem is "sunk in" to them, right?
Old 11-10-2006, 01:24 PM
  #78  
Registered User
 
RED MX5's Avatar
 
Join Date: Feb 2004
Location: Dry Branch
Posts: 7,087
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by mxt_77,Nov 10 2006, 01:12 PM
Where the rev limiter actually engages.
The beeper has a resolution of 100 RPM, and I've heard many people say that the limiter cuts in at 9,200. Modifry could say for sure, but I suspect the beeper is simply counting pulses, and if that's the case, a reading of 9,100 RPM could be anything from 9,100 RPM to 9199 RPM.
Old 11-10-2006, 01:26 PM
  #79  
Registered User

 
SpitfireS's Avatar
 
Join Date: Jan 2006
Location: 17 ft below sea level.
Posts: 4,949
Likes: 0
Received 21 Likes on 16 Posts
Default

1 minute ago I send Modifry an e-mail with a question about accuracy and resolution of the high rev memory
Old 11-10-2006, 01:43 PM
  #80  
Registered User
 
RED MX5's Avatar
 
Join Date: Feb 2004
Location: Dry Branch
Posts: 7,087
Likes: 0
Received 0 Likes on 0 Posts
Default

[QUOTE=SpitfireS,Nov 10 2006, 05:26 PM]1 minute ago I send Modifry an e-mail with a question about accuracy and resolution of the high rev memory


Quick Reply: Even more broken retainers found



All times are GMT -8. The time now is 03:22 PM.