Olazz
Well-Known Member
- Joined
- Apr 23, 2010
- Messages
- 1,428
- Country Flag
Having made all of changes to the truck, it was obvious that the fuelling had to be increased to cope with hauling 4T around the bush. I read on various sites that it would be wise to fit an EGT gauge and meant to do this after fettling with the pump. Anyway I adjusted the fuelling and though no more of it. We have doe about 15,00km with increased fuelling.
Before this latest trip however, I decided to get it done . I have a mad man gauge now fitted mid manifold and pre turbo and the default alarm setting is 720ºc
Having read up quite a bit about this subject (and opinions differ) I left this as the default setting to see what was happening on my particular setup. According to many reports the pre turbo Temp will be between 200º - 300º higher than post turbo, due to turbo spooling and heat absorption.
Opinions also vary on what is an acceptable max for temp in various diesel applications, varying from 700º – 900º. ( all pre turbo temps)
So what’s the point?
Now the max I purposely pushed to was 890º over a 2 minute period, to allow the cruise to maintain 100kph whilst climbing a steep hill in top.
I would assume that as I drove like this often, pre installation, either:-
1) I have already done huge damage to the motor.
2) These temps are quite safe to operate at.
Will be interesting to hear if anyone who has more experience of this has some advice or comment.
Before this latest trip however, I decided to get it done . I have a mad man gauge now fitted mid manifold and pre turbo and the default alarm setting is 720ºc
Having read up quite a bit about this subject (and opinions differ) I left this as the default setting to see what was happening on my particular setup. According to many reports the pre turbo Temp will be between 200º - 300º higher than post turbo, due to turbo spooling and heat absorption.
Opinions also vary on what is an acceptable max for temp in various diesel applications, varying from 700º – 900º. ( all pre turbo temps)
So what’s the point?
- I have had to change my driving style considerably as a result of this extra information.
- Earlier gear changes are not always the best to keep EGT low.
- Dropping to a higher gear reduces EGT by the fact that you are driving slower… if you still keep the pedal floored EGT rockets.
- One can still maintain a set speed even if you back off the throttle slightly, thereby saving fuel too.
- There is a considerable increase in EGT in my vehicle by increasing the speed by as little as 5km when over 100kph; varying between 550 – 650º @ 100 and 690-760º @ 105kph.
- Cruise control is not good for maintaining steady EGT as the sender unit applies FULL throttle to keep speed constant when there is a drop off.
Now the max I purposely pushed to was 890º over a 2 minute period, to allow the cruise to maintain 100kph whilst climbing a steep hill in top.
I would assume that as I drove like this often, pre installation, either:-
1) I have already done huge damage to the motor.
2) These temps are quite safe to operate at.
Will be interesting to hear if anyone who has more experience of this has some advice or comment.
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