Thanks Matt I was going to cap it at the catch can,
Was just down talking to Andrew at On Track, he thinks the theory is right
but what gains I get may be minimal, I do need to buy a Hump hose which I did.
I think in the end Id be happy with a small boost gain,to keep EGT down, plus it looks neater lol
Minimal gains but more efficiency I'll take that
Last edited by threedogs; 15th April 2015 at 10:25 AM.
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
You cant cap it at the catch can. The vent line from your rocker cover needs to able to breathe. If you cap the catch can then thw crankcase will pressurise and cause all sorts of dramas.
So what you can do is have your hose from the rocker cover go into your catch can then on the outlet of your catch can just run a length of hose into your chassis rail leaving it open on the end.
threedogs (15th April 2015)
Cool thanks again , now to source some larger IC boost pipes.
they increase in Diam at the IC, they could also be wrapped to keep temps down too
this will replace my OE IC piping
http://www.ebay.com.au/itm/90-degree...item35d53dc5c9
For anyone up sizing the pipes they will need 60mm
Last edited by threedogs; 15th April 2015 at 05:43 PM.
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
Dinger (17th April 2015)
Taking this into account I removed my maf housing and measured it up yesterday, the ID has a 2.5mm tapper in it with it being larger on the in going side. So I chucked it in the lathe and removed the taper. To try and slow the airspeed over the maf as I could only get 14psi, with moderate spool up, before getting limp mode. First thing I noticed was how much smoother it is at idle.(my passenger side airbag used to vibrate). I have uped my boost to 16psi now and have had limp mode once since. I'm gunner take another .5mm out on Monday and see how it go's. Is the hpd housing I'd straight through or tapered?
03 ST-L auto, Dawes and needle valve, provent catch can, 3' exhaust. I want more than I got
Last edited by Dinger; 15th April 2015 at 06:56 PM.
Paule (15th April 2015)
Good work, basically that's all the HPD Maf housing is, BUT has slightly larger where the MAF sits, if I was to do it again I would do exactly as your doing and just hone the original MAF housing ever so slightly, not as much as the HPD, but admit since installing the HPD maf housing and air box lid have not had limp mode once but needed a chip to put more fuel in, on a side note I have tried several different psi rating from 14 which was all I could get max before mods to 20 psi and have found that by my gauge 16.5 psi is perfect and has really good smooth power gains with egts in the low 300's at 100k's now, much better than before.
02 GU ZD30 Auto, NADS, Setting up for touring and camping, Best thing is the missus loves driving it to..
I have had the same results as SG1.
Zero incidents of limp mode both towing and not.
As I said earlier max boost is 17psi, 10 psi at 100 km/H and EGTs 250c