Thread: Discovery TD5 Turbo Lag

Gday
Is the lag worse than before? It it manual?. Yes you can adjust the waste gate rod but even at standard factory settings the lag (in a manual) will still be felt at low RPM. I would be looking at what the turbo is doing. Test the boost pressure. With a Nanocom or with a guage post intercooler and review results. Standard boost is between 15-17psi. In my 04 TD5 manual, it is dead as a doornail until I get around 1200RPM up and then it revs out quickly. I have adjusted my wastegate to produce 18-19 psi at full noise. I have also fitted a boost guage post intercooler (where the EGR used to be). Also check for blocked air filter, delaminated intercooler hoses and blocked intercooler. (oil)!
Regards
Robbo.

The lag is probably what it was before and it is automatic. The reaction of the turbo system is quite audible as a "woosh". My tacco shows revs going up but response is limited for a short while. She certainly will not pull out from a standing start. She will walk then jog.

Wastegate only controls maximum boost level.
If you have just done the head, I would be looking to see that the injector clearances have been set correctly otherwise fueling will be way down and this will have a significant effect on lag at low revs.

And as above, intercooler hoses etc are the bread and butter checks.

Regards

Andrew


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Obviously you have not driven a Nissan 3lt Turbo. We have one as a fast attack and you put your foot down and count, I have counted 5 before anything happens, much worse than my Defender and that is in first gear. The thing loses revs so bad it is regular for one of us to stall it.

Originally Posted by CraigE

Obviously you have not driven a Nissan 3lt Turbo. We have one as a fast attack and you put your foot down and count, I have counted 5 before anything happens, much worse than my Defender and that is in first gear. The thing loses revs so bad it is regular for one of us to stall it.

And that annoying exhaust noise when you lift off between gears.... Drives me nuts in a mates one


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