Thread: 300tdi help

Hi Mick;

I've had my EGT up to 685 upstream of Turbo ,I'm told Maximum should be no further that 720 deg , where is your Diphramp position at the moment , eg 09:00 o'clock , 12:00 o'clock etc ?

My old Tdi stock EGTs were

95-120 idle
< 300 around town sub 60 km/h
< 450 around town above 60 but less than 90 km/h
< 550 full throttle around town
< 625 full throttle freeway hill climbs

after tweaking, much the same except long climbs equated to no loss in speed but continually climbing EGTs - well above and beyond 720.

Originally Posted by Disco_owner

Hi Mick;

I've had my EGT up to 685 upstream of Turbo ,I'm told Maximum should be no further that 720 deg , where is your Diphramp position at the moment , eg 09:00 o'clock , 12:00 o'clock etc ?

The dot is only really a relative marker, not absolute, as the diaphragm can be assembled in any position on the cone - 12o'clock could equate to something else from engine to engine. Provided you know where the dot was when you started, you can return it standard or by eye as there is only 180 degrees of possible adjustment.

Originally Posted by Disco_owner

Hi Mick;

I've had my EGT up to 685 upstream of Turbo ,I'm told Maximum should be no further that 720 deg , where is your Diphramp position at the moment , eg 09:00 o'clock , 12:00 o'clock etc ?

it's set atm with the pin on the flattest part it seems the only position my egts dont rocket up but they still get very high and i can hit 700 if i want too.

if i start at 12 and get to say 3 then i have great power for around town but can't go up a long hill at more then say about 80kmh

Originally Posted by disco_ute

if i start at 12 and get to say 3 then i have great power for around town but can't go up a long hill at more then say about 80kmh

Ahh yes, see my email.

Originally Posted by B92 8NW

The dot is only really a relative marker, not absolute, as the diaphragm can be assembled in any position on the cone - 12o'clock could equate to something else from engine to engine. Provided you know where the dot was when you started, you can return it standard or by eye as there is only 180 degrees of possible adjustment.

that's a fair call , I didn't realise that Diaphrams can be assembled on different positions of the Cone ? the ones I've looked at have been the same .. but I would have thought 300tdi Factory VE Bosch Pumps with eccentric cone marker 13H would have the eccentric Cone relative in the same position set to around between 08:00-09:00 which would be the same as others ,obviously not? and that's where mine is at the moment , I do recall ian's instructions that mentions something about the same position before he started tweeking the VE pump.

gday
My auto tdi egts are something like the following;
cruising on flattish roads at 100kph : 360-420
putting around town: 250-300ish
Pushing it hard up a long hill on a hot day: can go over 700 realively easily
Pushing it on a flat road..goes too fast to tell but can get up to 600+
I havent had the pump tuned to the bigger intercooler though but I think its pretty close to the mark
hope that is of some use

Maybe the pump timing needs to be checked.
I think you advance the timing when upping the fuel and maybe this helps to keep egt's down.
Give AG diesel a call, they might give you some advice over the phone ??