2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Side effects of wiring the OMP open?

Thread Tools
 
Search this Thread
 
Old 11-29-05, 04:22 PM
  #1  
Registered Loser

Thread Starter
iTrader: (6)
 
walken's Avatar
 
Join Date: Dec 2002
Location: Whiterock
Posts: 2,224
Likes: 0
Received 0 Likes on 0 Posts
Side effects of wiring the OMP open?

I noticed this on an engine that split in half. Too much oil pressure? Or a bandaid to premix?
Old 11-29-05, 04:30 PM
  #2  
Former Moderator. RIP Icemark.
 
Icemark's Avatar
 
Join Date: Apr 2001
Location: Rohnert Park CA
Posts: 25,896
Likes: 0
Received 19 Likes on 19 Posts
well it would probably lead to increased deposits and increased emissions, while there would be some reduction in octane value and of course increased oil usage.
Old 11-29-05, 04:31 PM
  #3  
Lives on the Forum

iTrader: (8)
 
RotaryResurrection's Avatar
 
Join Date: Oct 2003
Location: Morristown, TN (east of Knoxville)
Posts: 11,576
Received 25 Likes on 18 Posts
Smoke, oil use, carbon buildup, fouled plugs, possible power loss due to the latter 2 factors.
Old 11-29-05, 04:36 PM
  #4  
MegaSquirt Mod

 
muythaibxr's Avatar
 
Join Date: Sep 2004
Location: Maryland
Posts: 4,721
Likes: 0
Received 1 Like on 1 Post
you can wire it open on its lowest setting for when the ECU cuts fuel during decel, and then run premix for all other situations... that's what tofuball did.
Old 11-29-05, 04:59 PM
  #5  
Rotary Freak

 
Syonyk's Avatar
 
Join Date: Jun 2004
Location: Ames, IA
Posts: 2,718
Likes: 0
Received 1 Like on 1 Post
The thing is, premix leaves a layer behind, and an engine in fuel cut is seeing basically no load at all on the apex seals (no combustion pressure forcing them out, just spring & centripetal forces).

-=Russ=-
Old 12-14-05, 08:36 AM
  #6  
Jesus is the Messiah

 
Tofuball's Avatar
 
Join Date: May 2003
Location: Silver Spring, MD
Posts: 4,848
Received 0 Likes on 0 Posts
Sure it does, I just dont want to rely on that layer when I'm engine brakeing, especially going down a hill for sevral minutes (as can happen when I'm driving across the country)

I don't run into any of those problems (fouling, reduced octane, etc etc) because I have the OMP only running to the oil metering 'injectors' on the housings, and I have the pump set to only pump the minumum amount (you can barely even notice any used after driving 3000 miles)

Once, I turned it all the way up and you could SEE the oil moving in the lines :P
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
4
06-26-16 10:21 AM
CaptainKRM
2nd Generation Specific (1986-1992)
14
08-26-15 09:52 PM
Blk 93
3rd Generation Specific (1993-2002)
4
08-19-15 03:47 AM



Quick Reply: Side effects of wiring the OMP open?



All times are GMT -5. The time now is 02:34 AM.