bore wash?

[Guest Enzo]

i think bore wash is what happens when you supply too much fual to the engine when using a rrfpr and fual pump

am i right in saying this or am i way off the mark???

[lobotomy]

Borewash is caused by overfuelling mate -- It happens when the volume of fuel injected into the cylinders is more than can stay as vapour (an analogy is when you spray on deodorant, if you keep spraying it on your oxter it'll turn into liquid and run down your side) On the compression stroke the liquid form of fuel cannot be compressed and forces itself past the pitson rings, taking with it the lubricating oil, which in turn causes ring and cylinder wall damage. If it also makes it's way into the sump, it can thin the oil and lead to bottom end wear.

It takes a lot of overfuelling to do this though I'm sure mate, and it's far safer to be a little rich when tuning than lean.

[Glanza_Ragger]

well said lobotomy couldnt have put it better my self .

for that you get a shiny star

[keirz]

nice one lobo, i was actually explaining to some one today about overfueling, was about them stupid ebay chips he was gonna get one. i told him it could lead to overfueling, but i was wondering what the effects of over fueling was and that has explained it to me now. thanks.

[Glanza_Ragger]

as lobo said man, you have to be pushing mega fuel in for it to liquidize and begin borewash.

those ebay chips make me laugh. are they the ones that claim an instant 15% power increase ? a guy round the corner got one for his corsa comedy

[keirz]

yeah there the ones. i explained to him that it just tricks the ecu into fuelling more which could cause damage. i wouldnt buy one not even for a laugh!

but with the chip and also the turbonater, and some of that nos fuel addative you would be running some massive bhp

the thing is, dont hks make an afr regulater thingy me bob that does just bout the same thing as the chip?

[NeilH]

those ebay chips wont even make a car over fuel. they will do NOTHING.

the lambda sensor will pick up a rich mixture and immediately lean the mixture goin into the cylinder, so it will be useless.

so yes in theory it will make a car overfuel by the way its installed, but the overfuelling will be ironed out straight away due to various engine sensors.

all cars run by ECU work on closed loop anyway, so they only way to alter the fuelling is by remap.

BOSH.

[keirz]

all the more reason to not buy one then.

[Guest Enzo]

Borewash is caused by overfuelling mate -- It happens when the volume of fuel injected into the cylinders is more than can stay as vapour (an analogy is when you spray on deodorant, if you keep spraying it on your oxter it'll turn into liquid and run down your side) On the compression stroke the liquid form of fuel cannot be compressed and forces itself past the pitson rings, taking with it the lubricating oil, which in turn causes ring and cylinder wall damage. If it also makes it's way into the sump, it can thin the oil and lead to bottom end wear.

It takes a lot of overfuelling to do this tho I'm sure mate, and it's far safer to be a little rich when tuning than lean.

thanx mate

knew i was on the button but couldent discribe what actualy happened, if you dont mind ill quote something similar to that for the site

[lobotomy]

Not a prob... I could have worded it better, but the gist is right