Burning oil still after rebuild...


Im certainly no "know it all" or that you are a liar:shocked:

I just think you arguement is a bit flawed & not really based on fact or your own knowledge. Your sarcasm is not really called for either...

As i understand it...At idle or maintaining a steady throttle, the ECU is running "closed loop" & using the Lambda to maintain a nice 14.7:1/Lambda 1 AFR

How does removing the CAT make the car fuel leaner when its running closed loop? I may well be missing something but the CAT has nothing to do with the actual fuelling as far as i know

On WOT i understood the mixture can be a tad leaner due to increases in pumping efficency from breathing mods/decat BUT the fuelling still being dictated by the stock ECU map. The stock map is going to be mapped on the safe side (a bit rich) too

If im totally wrong then fair enough and il hold up my hands but i really dont think a decat is going to make a whole lot of difference
 
running a decat will only slightly affect afr's...

these cars are mapped on the rich side for safety..

in my opinion a decat should help bring afr's down a little from being so rich to were they should be at!THIS WILL NOT AFFECT OIL USAGE.


my car was running stupidly rich on dyno i think it was near 10.5!! i fitted a walbro 255 pump:angry:it was killing me on oil due to bore wash and contamination of the oil..

its now running around 12.5-13 i think at WOT and 18deg timing...

now if your theory is correct i should be pissing oil away...!


from changing from rich @10.5ish too near 13 my cars oil usage has just about STOPPED!

this is from experience:nice:
 
chrismc_DC2 said:
Im certainly no "know it all" or that you are a liar:shocked:

I just think you arguement is a bit flawed & not really based on fact or your own knowledge. Your sarcasm is not really called for either...

As i understand it...At idle or maintaining a steady throttle, the ECU is running "closed loop" & using the Lambda to maintain a nice 14.7:1/Lambda 1 AFR

How does removing the CAT make the car fuel leaner when its running closed loop? I may well be missing something but the CAT has nothing to do with the actual fuelling as far as i know

On WOT i understood the mixture can be a tad leaner due to increases in pumping efficency from breathing mods/decat BUT the fuelling still being dictated by the stock ECU map. The stock map is going to be mapped on the safe side (a bit rich) too

If im totally wrong then fair enough and il hold up my hands but i really dont think a decat is going to make a whole lot of difference
Click to expand...

take a good read in the resource area, there are AFR comparisons that you can see for your self!!
have you ever had a wide band fitted on your car and done experements with and with out the cat?

there is even a bit in there with reference to oil consumption with de cat.

(thats where the quote in my previous post camefrom)

normally i dont post information unless i have first hand experience of the subject, both the honda's ive owned (ITR, EK9)have both burn't more oil with a de cat.

i learnt a lot a few months back when a friend had a overfueling problem,(mot emissions fail), I spent a lot of time trying different things and monitering with wideband. and with some usefull help and tips from EK9turbo on here managed to find the issue, was a good learning curve!

closed loop can not always give perfection, the lambda sensor can only try and achieve target mixture (1afr),

the purpose is to try and average out and make small adjustments to compensate for altitude changes etc not big changes in flow.

the more changes you make the further away it will be from its desired afr,closed loop cant always offer perfection.
 
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graham084 said:
running a decat will only slightly affect afr's...

these cars are mapped on the rich side for safety..

in my opinion a decat should help bring afr's down a little from being so rich to were they should be at!THIS WILL NOT AFFECT OIL USAGE.


my car was running stupidly rich on dyno i think it was near 10.5!! i fitted a walbro 255 pump:angry:it was killing me on oil due to bore wash and contamination of the oil..

its now running around 12.5-13 i think at WOT and 18deg timing...

now if your theory is correct i should be pissing oil away...!


from changing from rich @10.5ish too near 13 my cars oil usage has just about STOPPED!

this is from experience:nice:
Click to expand...

I think you have missed the point, and your post is a contridiction with in it self,
 
I would give Tom at TGM a call, he will tell you instantly if there is a problem, or you can just pop down to his workshop at Fleet and talk to him.

Silkolene is a top oil for normal road use and most use it on track days. TGM use 10-60 in their race cars as it is always flat. I use 5-40 silkolene in both my DC5 and CRX VTi, both dont use oil. Except in vtec which is part of the process.

Oh and see it you can beat my time of 9.09 in my CRX around the ring, bridge to bridge. There was an accident on my lap it would have been 10 to 15 seconds faster. 3 bikers were lying in the track after coming off after wipperman.
 
would have the thought the piston rings would be going out also.
any feedback from after the ring?
 
ian dc5 said:
I would give Tom at TGM a call, he will tell you instantly if there is a problem, or you can just pop down to his workshop at Fleet and talk to him.

Silkolene is a top oil for normal road use and most use it on track days. TGM use 10-60 in their race cars as it is always flat. I use 5-40 silkolene in both my DC5 and CRX VTi, both dont use oil. Except in vtec which is part of the process.

Oh and see it you can beat my time of 9.09 in my CRX around the ring, bridge to bridge. There was an accident on my lap it would have been 10 to 15 seconds faster. 3 bikers were lying in the track after coming off after wipperman.
Click to expand...

Don't think i got anywhere near 9.09 the laps i timed where slower than last year however lots of traffic and incidents. We think guaging on last year low 9mins perhaps around 9.20... But can't prove that.

pimpinblackcivic said:
clean the pcv valve, it might be stuck open
Click to expand...

Definitely goin to try this i hope its just that....

babyface said:
would have the thought the piston rings would be going out also.
any feedback from after the ring?
Click to expand...

Burnt 5 litres of oil in 1500 miles, what i don't get is its all over the place the way its burning, plugs are fine no signs of it running rich. Pulls like a train keeping with EP3's in straight lines arround the track.

An example of oil consumption.

Did 4 hard VTEC laps then drove 100 miles at around 80-100mph to airport and back with 50-60mph country roads aswell. Burnt approx 100-200ml of oil. Happy with that :nice:

Drove back from the Ring to calais 307miles and burnt 600-700ml of constant driving between 70 and 100mph :angry:

Weird!!! :nice:
 
Compression checked today 205 psi across all 4 cylinders....

No problem there then...
 
Well,

Mine has burnt 1 litre in about 600 miles with minimal VTEC use. What do you guys think about this?

Still a lot in my opinion.
 
That is slightly more than mine. Mine does approx a litre every thousand miles. It tends to chuck out smoke first VTEC then not a again.

I'm going to probably strip down new headgasket, stem seals and rings if its still burn it after that i will give up.

Have you done a comp test? Dunsy burnt a ltire in 300 miles at the weekend just driving to JAE!!!
 
ian, get bores measured precisely (go to place that has very precise tools if need be) while doing that work
 
iceman said:
ian, get bores measured precisely (go to place that has very precise tools if need be) while doing that work
Click to expand...

Bring the block to my place if you like. I have all the best blueprinting tools including bore-gauges accurate to two-hundred-thousandths of an inch! 0.00002"

ijwhiteman said:
To see if they are oval or not?
Click to expand...

Its not just the shape of the cylinders, theres a hell of a LOT more that effects the oil consumption and quality of the build.

ijwhiteman, if you do want all the problems sorting. Consider dropping me an email or giving me a call.
 
Pfffft should have kept the B16B, they can stick with DC5 or EP3 round a track :nerv:

Sorry that's as far as my input goes, haha

PCV valve wouldn't cause that sort of consumption

As much as the oil use may not bother you I would get it seen to sharpish, that's alot of oil to be burning
 
Any further results from this??

Im quite intrested as i have recently just Rebuilt a b18c and its now after a 1000miles of no smoke, started smoking now but only in vtec and will use around 1L of oil within 250 miles with alot of constant vtec driving but even with normal driving will use 1L within around 500-600 miles.

Only realy smokes when gunning it and reving past 5 i can see it out the rear window.

Checked the comp today and it was a healthy 230-240psi on all four.

Could the PCV valve or system be at fault for this much burning??
 
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Stuarty said:
Any further updates with this? Did u get sorted?
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Nope, just pretty sure its rings so i'm in touch with will for a rebuild.

EK9turbo said:
Bring the block to my place if you like. I have all the best blueprinting tools including bore-gauges accurate to two-hundred-thousandths of an inch! 0.00002"



Its not just the shape of the cylinders, theres a hell of a LOT more that effects the oil consumption and quality of the build.

ijwhiteman, if you do want all the problems sorting. Consider dropping me an email or giving me a call.
Click to expand...

LOL didn't see this, being done at present :p

stevenEK9 said:
Pfffft should have kept the B16B, they can stick with DC5 or EP3 round a track :nerv:

Sorry that's as far as my input goes, haha

PCV valve wouldn't cause that sort of consumption

As much as the oil use may not bother you I would get it seen to sharpish, that's alot of oil to be burning
Click to expand...

Na B18C FTW just not one that burns oil!

KieranEG6 said:
Any further results from this??

Im quite intrested as i have recently just Rebuilt a b18c and its now after a 1000miles of no smoke, started smoking now but only in vtec and will use around 1L of oil within 250 miles but even with normal driving will use 1L within around 500-600 miles.

Only realy smokes when gunning it and reving past 5 i can see it out the rear window.

Checked the comp today and it was a healthy 230-240psi on all four.

Could the PCV valve or system be at fault for this much burning??
Click to expand...

Nope all i can say is it wasn't the PCV valve. I'm having mine rebuilt.

Thats is burning a lot of oil, alot more than mine.
 
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