New HPD MAF housing put in!

Ok, Put the new HPD MAF housing in a couple of days ago mucked around with the boost today and it is sitting at 20psi and no limp mode. I know early days but loving it so far. I could not go above 14psi before. Did't really feel any difference until I went for a drive today going up the hill that seems to throw it in to limp mode in the past as I was going up I didn't have the right foot to the floor like I would normally. Temps only got to 400deg.

The question is what boost is too high? What are the ramifications? Good or bad for the engine?
Really want to get a chip now.
Cheers
Scott

I run 25psi mate with no issues.

would you get much more from a chip,
how about a re map seems to be better than a chip


Edit.. the Hume hwy out of Melb is 110 kph max on the way to the Murray.
so for me anything around 12-15 psi would make me happy

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Originally Posted by threedogs

would you get much more from a chip,
how about a re map seems to be better than a chip

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I think it is breathing a hole lot better now but a bit more juice through might give it some mumbo! I wasn't sure if you could do the remapping on a DI. Thought it was CRD only.

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Originally Posted by mudski

I run 25psi mate with no issues.

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Is it worth getting the air box lid from HPD aswell?

I cant see how the lid mod would improve things,Its only one 76mm elbow , look at it??
Im just about to change the complete air intake from the Maf housing to the turbo
I hope it will do the same as the HPD maf housing by allowing more air to flow ?

I've been thinking about this maf housing for a while, is there any reason I can't chuck the stock maf housing in the lathe and open it up a bit? What is the ID of the hpd maf housing? Is the stock housing wall thickness thick enough? I'm a fitter and have access to a lathe

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Originally Posted by Paule

I've been thinking about this maf housing for a while, is there any reason I can't chuck the stock maf housing in the lathe and open it up a bit? What is the ID of the hpd maf housing? Is the stock housing wall thickness thick enough? I'm a fitter and have access to a lathe

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I dont think you have enough material to machine, I have a spare housing here.
they say the HPD one is flowing 33% more the OE maf is 70mm
so the HPD one must be what 80- 85mm over 100mm distance.
My thinking is if I can remove the convoluted OE intake it would acheive the same thing
wall thickness is about 4mm approx no more

Quote:

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Originally Posted by threedogs

I dont think you have enough material to machine, I have a spare housing here.
they say the HPD one is flowing 33% more the OE maf is 70mm
so the HPD one must be what 80- 85mm over 100mm distance.
My thinking is if I can remove the convoluted OE intake it would acheive the same thing
wall thickness is about 4mm approx no more

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Do you want your old housing TD?

Im going to use the OE maf and use tig welded stainless steel pipe for the intake.
Ill see how that goes , must flow more air.
If that doesnt do anything Ill laser cut a new lid and tig weld a 76mm elbow to it.
Thats the plan just waiting for it all to arrive ATM, using AN 10 black fittings and braided hose for
catch can hoses

@ Paule I grabbed mullet-hunters old MAF to see if I could mod it, being ABS you might be able to skim
a couple of mm off it, Ill take it to On Track in the morning and see what Andrew says

http://www.ebay.com.au/itm/161362145...%3AMEBIDX%3AIT

Was toying with the idea of using this housing as its 6mm bigger than OE

Providing your maf will fit into this housing and you can adapt this to your vehicle, there is no reason why it would not work. I saw these a while back before I got my HPD housing. Laziness got the better of me though...

Quote:

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Originally Posted by threedogs

would you get much more from a chip,
how about a re map seems to be better than a chip


Edit.. the Hume hwy out of Melb is 110 kph max on the way to the Murray.
so for me anything around 12-15 psi would make me happy

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Depending on chip, the DS chip does the same as the HPD housing, but in the electrical side of things, and I don't think you can remap the DI ecu. I think...
I'm going up the Murray on Thursday with the camper in tow. At 110k, on the flat, I usually sit on around 18psi.

Do you guys know what the ID is of the hpd housing?

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Originally Posted by Paule

Do you guys know what the ID is of the hpd housing?

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74.3mm.............

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Originally Posted by mudski

74.3mm.............

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Thanks mudski

No problem. :D

Just took it for a decent run and some hills and it is spot on. Maxing at 19 to 20psi. Not sure why it is so different but don't really care. I will hit some tracks next week down at Lithgow so see how it goes. Cheers

Good to see mate. You can now kiss limp mode goodbye, forever.

Quote:

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Originally Posted by Paule

Do you guys know what the ID is of the hpd housing?

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Would be easy enough to whip up a new MAF housing, OD is 3.25" so
Ive ordered a 3.25" to 3" reducing hose, That Skoda housing has
a maf Hole in it is about 34mm approx. Skoda maf housing 1.7mm bigger than HPD

Or skim 3mm out of the OE housing

Is this mod only if the car is going into limp mode? Would a CRD benefit from using it?
Looking on the HPD's web site they only have a model for pre Aug 2004 and Aug 2004-2008. This would include early CRD's but not the bulk of them. The site only mentions ZD30DI models, not CRD. My car is a 2007 and I suspect its using the same housing as the DI's but I do not have any limp mode issues.

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Originally Posted by Rock Trol

Is this mod only if the car is going into limp mode? Would a CRD benefit from using it?
Looking on the HPD's web site they only have a model for pre Aug 2004 and Aug 2004-2008. This would include early CRD's but not the bulk of them. The site only mentions ZD30DI models, not CRD. My car is a 2007 and I suspect its using the same housing as the DI's but I do not have any limp mode issues.

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All this housing does, in a nut shell, is raise the limp mode level of your car. SO say its 18psi, with the housing its now 30psi for example. If you are running at level and your not seeing limp mode, and your happy with the power you have, don't waste your coin. If your having issues with limp mode at lower psi levels, then its worth every cent.
For your car, this is the one you need....
http://hpdiesel.com.au/nissan-patrol...-meter-housing