Suddenly, Im a boy racer........

[stormforce]

Llanfairpwllgwyngyllgogerychwy rndrobwllllantysiliogogogoch

i said 5 letters not the bloomin alphabet..

[plumb bob]

T O Y O T

[nero279]

that's why the letters on the back are all spaced out, we read toyota, the west country lot read tee oh why oh tee ay

[TonyN]

T O Y O T

I prefer ( O Y O )

[Billy-No-Money]

Actually, it's not. An indication is merely a notification of something. An indicative indication is an enhanced and more precise notification/quantification of a base [something]. (When will you lot ever learn)? [/quote]

Im really sorry Matt and I hate to labour a point, but any given information can either indicate a value or idea, or BE indicative of it, but not both. In point of fact, neither 'indication' nor 'indicative' constitute the precise or accurate notification/quantification of information or values either physical, intellectual or abstract,as both terms are suggestive. This I know as Ive seen how some folk use thier indicators.

[The Hornet]

Ok, I'm no technical expert but when I changed the pipe and filter on my bike I had it on the rolling road and dynoed. After measuring the exhaust gas he could tell the the bike was running lean and the carbs had to be re-jetted.

Is there not a similar test/pipe up the exhaust for diesels? That way we could see if it was rich or lean and compensate at the pump.

[TonyN]

Im really sorry Matt and I hate to labour a point, but any given information can either indicate a value or idea, or BE indicative of it, but not both. In point of fact, neither 'indication' nor 'indicative' constitute the precise or accurate notification/quantification of information or values either physical, intellectual or abstract,as both terms are suggestive. This I know as Ive seen how some folk use thier indicators.

Thats a sensible reply.... Matt?

[TonyN]

Ok, I'm no technical expert but when I changed the pipe and filter on my bike I had it on the rolling road and dynoed. After measuring the exhaust gas he could tell the the bike was running lean and the carbs had to be re-jetted.

Is there not a similar test/pipe up the exhaust for diesels? That way we could see if it was rich or lean and compensate at the pump.

Diesels don't work like that, very basically you can lean it out till there isn't enough deisel for it to make power, or richen it till unburnt diesel (black smoke) comes out the exhaust, and its a waste of fuel.

[BUSHWHACKER]

I think this thread has gone on far too long now, let's all just twiddle our screws and come back after a couple of days with the results.
Then we can have one of those colourful polls.



Thank you.

[dieselboy]

just take into account that if your leaning out the mixture, then there is more air getting combusted and therefore more heat.
you will end up melting exhaust valves at extremes and may be pistons. im not sure how much the gaskets can take but ive heard a lot of stories about gasket and head trouble on 2.4s. every time i walk into my uncles garage someone shouts 'what you after, a new head?'
just to add, when im under full boost, then i let off, i get a dump of the turbo pressure from somewhere. and it makes a tishsshh sound. funny really

also i hope your not just watching water coolant temperature and taking that as what your engine is running at. the reason i say this is because the heat is made in the bores and is pushed out the exhaust valves and through the turbo. understand that engines will burn out exhaust valves and melt them, and the pistons will exhaust the molten metal, you will even take the head off and see per cylinder 1 inlet and 1 exhaust, and the exhaust part melted and the inlet un-touched and near enough correct colour and they are right next to each other in the same cylinder! water just flows around the outside of these areas.
and with a turbo, you dont want engine bits melting and going through the impeller. but if your engine is disposable and your testing for hiluxsurf member knowledge then crank up the air
does your engine have an intercooler by the way?

[MattF]

Thats a sensible reply.... Matt?

Actually, to prove that I'm not being argumentative for the sake of it, , I'll ask Sancho to grace us with his opinion on this one. His verdict goes.

[Sancho]

Actually, to prove that I'm not being argumentative for the sake of it, , I'll ask Sancho to grace us with his opinion on this one. His verdict goes.

I couldn't give a f*ck mate. Let's all get back to arguing in the chit chat section.

[dieselboy]

I couldn't give a f*ck mate. Let's all get back to arguing in the chit chat section.

lol

[Billy-No-Money]

...just take into account that if your leaning out the mixture, then there is more air getting combusted and therefore more heat........you will end up melting exhaust valves at extremes and may be pistons........also i hope your not just watching water coolant temperature .....and with a turbo, you dont want engine bits melting and going through the impeller. but if your engine is disposable and your testing for hiluxsurf member knowledge then crank up the air
does your engine have an intercooler by the way?

I have now turned the screw back to its start point (which without further data I have to presume is the factory set) then gone anti-clock 1/8 turn. It still smokes a little, but not badly, ao I guess I must be dumping unburned fuel through it ant therefore not overleaning the mix.

Yes, I was only watching the coolant temp as I thought that if the engine components ran hotter that this would be reflected in the coolant temp.

If molten engine parts are being exhausted , breaking the impellor fan with them is probably the least of my worries Arghhhhhhh...

An intercooler has been sourced and is due to be fitted as soon as I finish fabbing and welding the alluminium scoop. Once this is on then I fully expect to have to look at the fuel mix again to compensate for the denser air being inducted.

[dieselboy]

I have now turned the screw back to its start point (which without further data I have to presume is the factory set) then gone anti-clock 1/8 turn. It still smokes a little, but not badly, ao I guess I must be dumping unburned fuel through it ant therefore not overleaning the mix.

Yes, I was only watching the coolant temp as I thought that if the engine components ran hotter that this would be reflected in the coolant temp.

If molten engine parts are being exhausted , breaking the impellor fan with them is probably the least of my worries Arghhhhhhh...

An intercooler has been sourced and is due to be fitted as soon as I finish fabbing and welding the alluminium scoop. Once this is on then I fully expect to have to look at the fuel mix again to compensate for the denser air being inducted.

hi, this is all interesting stuff. my 2.4 does have an intercooler but im not sure exactly how the previous owner set it all up. diesel tuning is new to me.
standard non turbo diesels seem to run really well when the engine is fully warmed up, and in my experience if you have gone down the motor way foot to the floor and have reached top speed (80mph in the previous work car i had drove) you can back off the accellerator a tiny bit and feel the car pull a little more. this suggests the engines prefer a leaner mixture (providing that backing off actually jets less diesel and does not close any sort of butterfly. i have spoke with a few other people on this and they agreed they have seen the same.
i may have a twiddle with my fuel screw.
but with petrol turbo engines when more air is compressed into the engine more fuel has to be put in to compensate. but if this is the same for diesels, and it actually reduces the performance and increases smoke, then i cant see any real reason to do it. but i suppose we wont know until we try!