Thread: TD5 boosting at 19 psi

I wouldnt be worried about it.......

its a good thing.....

21+ is even better.........

well anyone who knows a little bit about a diesel knows that it is probably leaning out if there is not enough diesel going in to compensate. Which in turn leads to incorrect operating temperature and excessive engine wear??
Of course I could check it if I had an EGR sensor. one would assume this car hasn't been modified therefore something must be faulted. if it was absolutely rocketing I wouldn't complain but it seems pretty average to me.

Originally Posted by rathies

well anyone who knows a little bit about a diesel knows that it is probably leaning out if there is not enough diesel going in to compensate. Which in turn leads to incorrect operating temperature and excessive engine wear??
Of course I could check it if I had an EGR sensor. one would assume this car hasn't been modified therefore something must be faulted. if it was absolutely rocketing I wouldn't complain but it seems pretty average to me.

One would assume wrong

And one who knows about diesels would know that lean is cooler in a diesel not rich which increases EGTs

19psi isnt a problem as long as the engine isnt going into overboost on the ECU

BTW:- EGR is Exhaust Gas Recirculation and is an emissions system





So endeth part 1 of your lesson

In stock trim, mine went to 19 in the higher gears but about 22 in the lower gears, presumeably due to the MAP sensor being too far from the turbo to react quickly enough to start opening the wastegate sooner. But with just a larger intercooler fitted (one of Toombie's), the max was pretty much 17 in all gears, presumeably due to the less restrictive IC allowing the pressure to get to the inlet manifold sooner.

Originally Posted by rathies

I Just fitted a boost gauge to my TD5 to see what was going on and it seems to be making it all the way to ~19 psi! from what I can gather the standard boost should be regulated at 15-17psi. Is something broken? Is it possible my ECU might have been chipped by the previous owner (that is if chipping increases boost)?

WHat brand boost gauge?

fleabay ..seeing as it was one of those 'lying around in the shed' items I thought I might aswell use it.

Then I wouldn't trust it. Most of the cheapies you can move the back plate and your readings will be different.

So you are probably not getting 19 PSI at all.....

How many Bar is 1 psi ?