More on the EGR Bypass Valve....Modify or Leave alone

[Jamie]

Originally Posted by ColinW

If you yourself have sufficient engineering knowledge, as I'm sure you have, then is it not possible to enter into some meaningful discussion about how to achieve both our aims?

Colin

Colin, I fear the only way to achieve power increase and reduce emmisions would be (dare I say it) to go and buy a more modern diesel...then there would be no owners club, no forum, no discussions and we would all be driving around in little chinese tin boxes partially built from metal that was stolen from our churches and schools.

[BigRuss]

Originally Posted by Jamie-Biker in a suit

Colin, I fear the only way to achieve power increase and reduce emmisions would be (dare I say it) to go and buy a more modern diesel...then there would be no owners club, no forum, no discussions

Exactly.

Russ

P.S. I will be unavailable to comment for a few days , so don't think I'm ignoring anyone.

[Ross R75]

Originally Posted by ColinW

Nobody is paying lipservice to Rincewinds report. It stands on it's own merit. Also we are all aware that those tests having nothing to do with the MOT. They demonstrate what the EGR system is doing to remove NOXious gases. If you or anybody else wish to ignore it, then that's your perogative. It clearly suits your argument if it is ignored. But sure as eggs are eggs, it will come. So then what?

Colin

It makes no difference to my argument. Its not tested for in the MOT and even if it does become part of the test, it will not be retrospectively applicable so will have no impact on our cars.

Originally Posted by ColinW

What's the point. The 'Bypass brigade' wouldn't take part. Even one of our own moderators voiced this quite clearly- he couldn't care a damn. That's a sad thing in itself, in as much that it seems to have clouded judgment to the point that nobody is even considering the possibility the're other ways.
Colin

I think its exceptionally narrow minded and incredibly arrogant to take the stand that the club members are so unintelligent that they have somehow been brainwashed by one person's opinion and views. Everybody makes their own decisions and so far as they don't break the law of the land, they must be respected. Democracy and freedom of speech in action.

Originally Posted by ColinW

If you yourself have sufficient engineering knowledge, as I'm sure you have, then is it not possible to enter into some meaningful discussion about how to achieve both our aims?

Colin

I'm no engineer and my understanding of diesel engines and the M47R in particular has been self gained rather than taught. The EGR bypass tube available to us is of a basic design but it does its job perfectly.

The one way I can see to improve it would require a remap to the ECU to recalibrate the values for total volume and flow rate of the intake air ducting. You could then retain the EGR system but increase the diameter of the EGR valve and the intake manifold itself by an amount equal to or greater than the volume of the EGR valve piston. This would maintain the re-burn of noxious gasses whilst continuing to increase the volume of induced air.

In my opinion this approach would be prohibitively expensive due to the small market for this type of device but it would definitely increase engine performance whilst maintaining lower emissions.

[ColinW]

Originally Posted by Jamie-Biker in a suit

Colin, I fear the only way to achieve power increase and reduce emmisions would be (dare I say it) to go and buy a more modern diesel...then there would be no owners club, no forum, no discussions and we would all be driving around in little chinese tin boxes partially built from metal that was stolen from our churches and schools.

You're absolutely right!
However, there's a lot of us out there, who are sort of lumbered with what we've got.
The M47R engine is basical quite good, suffering as it does by the BMW constraints. I do understand, despite what some might say, that if some of it's latent power can be released (for those that want it), then yes, that is a good thing.

My only reservation is it should'nt be at any cost

So, getting back to the original discussion - I think there should be a poll, to see how many people would:-

A/ Have a bypass operation
B/ Leave well alone
C/ Happy with bypass
D/ Would disable EGR
E/ Change back from bypass or disabled EGR
F/ Unsure

So how about it?

Colin

[Raistlin]

Originally Posted by ColinW

So, getting back to the original discussion - I think there should be a poll, to see how many people would:-

A/ Have a bypass operation
B/ Leave well alone
C/ Happy with bypass
D/ Would disable EGR
E/ Change back from bypass or disabled EGR
F/ Unsure

So how about it?

Colin

Sounds like a good idea - especially if people would explain their reasoning. Then those of us for whom mechanical engineering is wizardry, would have a range of ideas to directly compare.

I think it should be a completely separate thread to this one though.

[Rincewind]

Originally Posted by bigruss42

If fact as Rinceweed said himself

Who is this Rinceweed character? He keeps popping up and making an appearance - does anyone know what he drives??

Nic

[Raistlin]

Originally Posted by Rincewind

Who is this Rinceweed character? He keeps popping up and making an appearance - does anyone know what he drives??

Nic

Not everybody has read Pratchett I guess Nic

[Zeb]

Originally Posted by ColinW

To Zeb & Raistlin

My, you are sensitive souls. I can assure you if I really was trying to be rude, I probably would be banned from this forum.

However, I get very iritated - as much as you do- when factual reports such as posted by Rincewind, are looked at with a completly different perspective to the truth. By which I mean, it was viewed by one or two, as supporting the disconnection of the EGR and it wasn't till I persisted in getting Rincewind to explain this, that it was eventually cleared up. One member did have the guts to admit he got it wrong.

Another thing, I offered, what I thought was a concession, to put our thinking caps on, and perhaps come up with some form of halfway house, where the environmentalists, and the bypass brigade, can each have a bit of the cake. Virtualy no response.

How many read the contents of the link I put up.? One to my knowledge. If others had actually read it, then you would have seen that the alteration of injection timing, to 12 deg BDC, had a dramatic effect on emmisions. That's why I suggested that anybody into re-mapping might like to have a go. I know that's asking a bit much, but at least it should have sparked debate.

I've got some ideas which I am exploring. Which, if I can find time, I will try & implement. Not for any commercial gain, just out of interest.

So you see, when people criticise, without offering anything in return, and the only goal they seem to have, is power at any cost, is there any wonder I get frustrated.

Colin

There is a difference between being a 'sensitive soul' and expecting good manners from people.....the rest of your points are unrelated to your lack of them..


On a happier note, the thread itself is absolutely fascinating

[Rincewind]

Originally Posted by Raistlin

Not everybody has read Pratchett I guess Nic

I know, thought I'd lighten the mood a little (he he)

[andyw]

Presumably Rinceweed drives a weedy 110 version of the R75