discomikey Posted August 4, 2015 Share Posted August 4, 2015 Hi all, the other day i took my mate out for a spin as he was interested in a TDi, long story short i found out my engine is literally a fire (amber burning soot?) breathing monster. The engine wasnt particularly hot, it had been warmed up on a 4 or 5 mile normal speed drive, sat idling for about 5 mins and then i took him for a blast up the road. my truck started producing glowing exhaust gases within less than a minute of hard driving, literally first, second, third, glowing. my question is surely i cant have got it to above the EGT safe limit in that short a time? so what temperature does diesel soot start to burn off at? here's the video (sorry non facebook users, my youtube is currently not working) P.S. EGT gauge ordered within 5 mins of finding out! Also, whats better, Intercooler or water to air charge cooler? Quote Link to comment Share on other sites More sharing options...
qwakers Posted August 4, 2015 Share Posted August 4, 2015 you have to make the post public or we cant see it.... Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 4, 2015 Author Share Posted August 4, 2015 Done Quote Link to comment Share on other sites More sharing options...
landroversforever Posted August 4, 2015 Share Posted August 4, 2015 Interesting! Only diesels I've seen that on are tractor pullers at night! Quote Link to comment Share on other sites More sharing options...
qwakers Posted August 4, 2015 Share Posted August 4, 2015 id be concerned about the health of the turbo... im betting its not looking good in there anymore... Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 4, 2015 Author Share Posted August 4, 2015 I've been going steady on it since, but it's still boosting as hard as before, i actually turned it down a bit the other week. It had been running another 5psi before that. Maybe it's time for a water cooled vnt! Quote Link to comment Share on other sites More sharing options...
qwakers Posted August 4, 2015 Share Posted August 4, 2015 i really would pull the turbo off and have a good look at the exhaust impeller for damage. that will tell you if its hot before or after the turbo. Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 4, 2015 Author Share Posted August 4, 2015 I'll do that next weekend then, busy all this weekend off to king of wales Quote Link to comment Share on other sites More sharing options...
vulcan bomber Posted August 4, 2015 Share Posted August 4, 2015 My brother in laws 110 does this on a regular basis with so far no ill effects and mines done it in the past with about 8 or 10 inches of flame out the exhaust and again It's all fine they both boost to about 16psi and there both 200tdi's. Water cooled turbos only exist to stop the oil coking after you switch the engine off, the waterways in them actually move the water around to cool them. Quote Link to comment Share on other sites More sharing options...
Boydie Posted August 5, 2015 Share Posted August 5, 2015 The general consensus is that the maximum turbo temperature should not exceed 750*C - above that the titanium vanes can distort. The exhaust flames in your video would be around 950*C so I'd be looking at your fuelling settings if I were you, that and your timing and you could well have a burnt out exhaust valve(s). Quote Link to comment Share on other sites More sharing options...
Boydie Posted August 5, 2015 Share Posted August 5, 2015 Re intercooler types, water/air are more efficient on cooling the air flowing through them than air/air - the downside is that to have a totally efficient water/air intercooler (or air charge cooler for those that don't like the term intercooler) to install one correctly you really need a separate radiator, electric radiator cooling fan and electric circulating pump rather than using coolant from the radiator which would commonly be around 80*C, whereas a correctly sized separate electric fan cooled intercooler radiator wouldn't go much above 40*C with an air delivery temperature of around 58*C. I looked at it for my Disco and it's a very, very expensive option, I was saved the expense as there wasn't anywhere I could install the radiator and the large water cooled intercooler, pump and pipework so I just got an upgraded intercooler core . Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 5, 2015 Author Share Posted August 5, 2015 I have a corsa cooling rad and electric fan that I was thinking of utilising to cool the water, which I would put in a seperate circuit like you mentioned. I think for the cost I would have to shell out for a custom intercooler, I could probably set up a charge cool system. Are there any rule of thumbs to consider for specifying the charge air cooling side of it? I can work out radiator size requirements and I have a suspicion a corsa rad is over specced for that haha Quote Link to comment Share on other sites More sharing options...
Les Henson Posted August 6, 2015 Share Posted August 6, 2015 Not to mention the fact that flames coming out of an exhaust on a public road is teensy bit illegal Les Quote Link to comment Share on other sites More sharing options...
qwakers Posted August 6, 2015 Share Posted August 6, 2015 ah no we dont care about things like that. my bike used do do something very simiar to this... Quote Link to comment Share on other sites More sharing options...
robertspark Posted August 6, 2015 Share Posted August 6, 2015 Didn't know it was illegal for flames to be emanating from an exhaust.... Seen them out of the back of an ultima, and I think they are designed (if that's the term) out of the rear of a McLaren (YouTube link required), but there won't be anyone standing behind if under deceleration or throttle lift off... (Ultima at night is impressive with a nice blue flame from twin exhausts .... Err when you're trying to keep up with it when it's just overtaken you on an A road) Quote Link to comment Share on other sites More sharing options...
muddy Posted August 8, 2015 Share Posted August 8, 2015 I think it's noticeable because you have a short free flowing exhaust, yours doesn't black smoke as much as my 90 but by the time the unburnt smokey fuel has got to the back of my 90 it's cooled and isn't reacting with the comparatively oxygen rich atmosphere that yours is IMHO. What size exhaust do you have and what boost are you running? Will. Quote Link to comment Share on other sites More sharing options...
missingsid Posted August 9, 2015 Share Posted August 9, 2015 Presumably the exhaust is very short and free flowing? Apparently my V8 M5 used to produce four flames out the back when it hit the rev limiter even with a standard exhaust! Nighttime video of you landy would be nice to see captured from a following car? Marc Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 9, 2015 Author Share Posted August 9, 2015 Currently running around 18psi although before it was basically permanently shut and off the gauge at 24+psi been like that for 4 years reliably. Just been to South Wales and back still pulling like a train and no loss of mpg. I think I'll put it down to the short ~3 foot long exhaust and for an EGT gauge to keep an eye on things Quote Link to comment Share on other sites More sharing options...
Boydie Posted August 9, 2015 Share Posted August 9, 2015 If you install the EGT probe in the plate normally used for the EGR return then the temperature indicated on your EGT gauge will be about 40-50*C higher than the actual temperature at the turbo vanes. If you are fastidious and want an accurate temperature reading then you will need to remove the exhaust manifold and drill and tap the front face of the manifold so that the EGT probe is all but touching the vanes and on the turbo centre line - in my opinion hardly worth the effort. Depending on the make of probe and the pyro casing and the minimum radius the pyro can be bent It could also be very close to the alternator so, before you attempt it, check the available distances first. Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 10, 2015 Author Share Posted August 10, 2015 The 200 doesn't have the EGR plate, the manifold will have to come off to drill and tap anyway so I'll do my best to position it well Quote Link to comment Share on other sites More sharing options...
Lewis Posted August 11, 2015 Share Posted August 11, 2015 It has a egr take off shaped lump cast into it. That's where my egt thermocouple is mounted. I drilled and tapped mine in situ Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 11, 2015 Author Share Posted August 11, 2015 is the filings not bad for the turbo? Quote Link to comment Share on other sites More sharing options...
Lewis Posted August 11, 2015 Share Posted August 11, 2015 Seems okay I used a fairly blunt drill so as to make powder not swarf, and just held the Hoover nearby when drilling. The tallow caught the tapping swarf in the flutes Quote Link to comment Share on other sites More sharing options...
elbekko Posted August 12, 2015 Share Posted August 12, 2015 Some grease on the drill bit helps as well to catch most of the swarf. Quote Link to comment Share on other sites More sharing options...
discomikey Posted August 12, 2015 Author Share Posted August 12, 2015 any idea how thick it is? all my bits are really sharp, if i know how thick then i can stop just before i break through to remove all swarf, then reapply grease to the bit for the last bit Quote Link to comment Share on other sites More sharing options...
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