Auto-Rx Customers Questions & Answers

Visit Auto-Rx® Home Page
Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: The bucks leak here


Senior Member

Status: Offline
Posts: 241
Date:
The bucks leak here
Permalink  
 


I guess we all know or at least believe that maximum, or optimal ring pack sealing, or mating provides maximum performance in any motor. Maximizing compression has got to provide for better use of fuel. Of coarse we can either use this performance for economy, or our right foot can enjoy the performance and negate potential economy.

 

But my real question here deals with crankcase ventilation and pollution control devices.

Lousy ring pack performance must lead to more blow by gases into the crankcase. This unburned or partial burned fuel gets cycled back through the intake system for a second chance at burning. But what is the fuel value of this blow by when it recycled back through the intake. My guess is very little making it a performance drag. I would think the recycled gases and unburned fuel lead to a filthy intake system as well. I think there is plenty of evidence that clogged EGR valves, MAF sensors and failing PCV valves would support this as well.

 

So ring sealing is important for increased performance when taken into consideration on a single firing stroke. But how much inefficiency is created from the unburned fuel being recycled back through the system from lousy ring sealing? And would we really need to run fuel system cleaners as often as we do, if we would just take care of the ring packs?



__________________


Veteran Member

Status: Offline
Posts: 31
Date:
Permalink  
 

http://yotarepair.com/Sludge_Zone.html

It's a theory that the toyota sludge issues come straight from a poorly designed PCV, instead of say a failing PCV do to age. I'm not sure if this addresses "engine performance" directly, but it seams there is some evidence that may pertain to your question.

"The actual cause of the problem is an inability of the engine's crankcase ventilation system (PCV) to move the normal gases from the engine. When these gases stay longer in an hot engine it allows deposits to form on the metal parts of the engine. When enough deposits are present "Sludge" is formed. In my opinion the reduced flow of the PCV is related to the vehicle emissions."

__________________


Senior Member

Status: Offline
Posts: 241
Date:
Permalink  
 

Thanks for the reply Shelby. So what you are saying in the Ota motors that have been proned to sludging it is a design flaw, likely coupled with excessive drain intervals on the crankcase lubricant. Caught in time wouldn't it be beneficial to ARX the motor. After all the crankcase gases have to be derived from blow by through the ring packs.

My original question deals with how much inefficiency occurs from ventilating half burned fuel back through the intake system, assuming it has a negative fuel value when compared to virgin fuel.

__________________


Veteran Member

Status: Offline
Posts: 31
Date:
Permalink  
 

I didn't consider that, I was thinking about how the unburnt fuel in form of a gas effects the oxygen, as it's the oxygen that is just as important as the fuel. Maybe having a system that adds more oxygen at a quicker rate would counter act the ineffeciency of having to burn the dirty 1/2 burnt stuff. Maybe something like a blower only not taking it to that level.

__________________


Member

Status: Offline
Posts: 5
Date:
Permalink  
 

People add oil catch cans in the PCV line before the TB so that blowby gases have another chance to condense. This seems to help a lot on some cars. You need to drain the goo once in a while, especially in winter when more condensation occurs, but it's not a big job and saves the intake from burning too much of blowby gases. I'm speaking about simple (DIY) closed oil catch cans, not vented ones because those apparently do not play well with ECU equipped cars. I don't know how inefficient are blowby gases in term of combustion compared to virgin fuel. They sure have a much lower octane index but if you trap them it's always better imho.

-- Edited by kilou at 09:05, 2007-06-08

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.

Tweet this page Post to Digg Post to Del.icio.us