Thread: Test Results: Donaldson Precleaner vs Safari RAM vs Toyota Head

Originally Posted by OffTrack

Air Temp is taken from the IAT/MAP sensor on the intake manifold. You could actually calculate intake charge density from the output of those two sensors.

Ambient Air Pressure is on the air box.

The pressure fluctuation is only a couple of Kpa, so it won't look too significant at that scale.

This is what I get on the D2 (stock intake and filter):



C11 is absolute manifold pressure and C10 is ambient press so the trace c11-c10 is boost in kpa.

You can see the airbox pressure drops by up to 3 kpa when the engine is running under maximum boost. I think in this case it points to the filter as a restriction. Perhaps it's less of a limitation in the Defenders but differences between the heads might point out the limits of flow.

Even at the scale in your graphs you can see there is more disturbance in the ambient pressure trace with the Donaldson head, which suggests it is more restrictive at higher flows.

cheers
Paul

Thanks Paul,

what chart program are you using ??.

I just did another Run after screwing the boost up a couple of turns & the EGT's with the Toyota head were 10 deg lower.

The ambient plot is easier to see against the boost without adding in the MAF
this is with Numbers, previous was Excel for Mac.


cheers Don

Originally Posted by PAT303

I would like to see the results from the Mantec head as it was designed for the defender,it feeds from the higher pressure air coming up off the windscreen. Pat

That would be very interesting, Who has a mantec & a Nanocom ??

Originally Posted by goingbush

Thanks Paul,
what chart program are you using ??.

It's an app called clickplot. Unfortunately there is virtually no information about it on the web - it's not even mentioned on the developers website. I stumbled across it in the Mac App Store.

I wrote a short tutorial on it here:
Nanocom Data visualisation on OSX

cheers
Paul

Have Mantec no nanocom!

Did see somewhere back there someone mentioning the Donaldson was big enough to flow enough air. Beware - Donaldson viz a viz engine capacity and turbo vs NA.

Donaldson is a particle separator - it needs a minimum air velocity to centrifuge the particles out of the air stream. Good flow could mean low velocity, little or no particle removal!

The normal LR 2.3 to 2.5 engines need the small dia Donaldson. As I recall years ago when I did the sums for my D2 TD5 measured against the Donaldson graphs the TD5 "suck" was just inside the plot (and not at idle and lower RPM, Snorkel sock for that in club convoys)

Real Question now. Anyone tried to fit Donaldson head to Mantec snorkel? Had thoughts for head and sock but only thoughts so far.

Cheers

RF

Donaldson tech literature and website will tell you that a swirl bowl pre-cleaner is for stationary or slow moving (heavy plant) installations.