Thread: Disco 300TDi dyno'd and ? overfuelling

McRover, here's the dyno readout as discussed.

BTW I rang Blackwood Dyno - they don't use a pyrometer. They're also very happy to dyno it again if there's a perceived problem with it. That's what I'm trying to determine hey!

Originally Posted by omvanders

McRover, here's the dyno readout as discussed.

BTW I rang Blackwood Dyno - they don't use a pyrometer. They're also very happy to dyno it again if there's a perceived problem with it. That's what I'm trying to determine hey!

Hey thats a huge improovement, was that just the intercooler or was that tweaked as well?

McRover when you say "was that tweaked as well?", in my ignorance I don't know what you're referring to.

The IC was fitted when I took delivery. With the new IC but nothing else altered by TRS as far as I know, the dyno shows 50kW. After the 'tweaking' of the dyno-tune it improved to 70kW. Needless to say I have to sink the boot in a lot less to get her moving, and for all intents and purposes the dyno seems to have done the motor a huge favour, providing of course I'm not closer to the brink of trouble when it comes to egt issues?

So they tuned (tweaked) the injector pump then?

Thats what im asking, Im pretty sure from what you have written that they have.

If the intercooler was already fitted when they did the initial run, then this says to me that the intercooler probably had little to do with the increased power and it was the tuning of the pump that did the major power increase.

Im just trying to find out if it would be really worth fitting a bigger/better intercooler or just tweaking it.

Thanks for that though, it does show that the tuning of the pump gives huge results.

Yes from what I've read elsewhere the fitting of an intercooler alone only gives a minimal benefit, but when combined with the tweaking of the injector pump the real benefits are realised.

Originally Posted by omvanders

McRover, here's the dyno readout as discussed.

BTW I rang Blackwood Dyno - they don't use a pyrometer. They're also very happy to dyno it again if there's a perceived problem with it. That's what I'm trying to determine hey!

Your kidding me, right???

Don't let anyone lay a finger on it without fitting a pyrometer first

JC

Don't let anyone lay a finger on it without fitting a pyrometer first

A lesson learnt JC. So, where to from here?

A bigger I/C allows for you to get more air into the cylinders and therefore more fuel for more power.

With the standard I/C you will get a bit more power if the pump is currently underfueling.

To put it another way, if you take your standard I/C and wind up the pump you will get more power, over do it and you will get a lot of black smoke and high egts. With the pump in that wound up state now put a bigger I/C in and you will drop the egts and reduce the smoke. You may also have to tweak the waste gate to produce a bit more pressure as the I/C can now cope and remove the additional heat from the air that makes up the charge.