Guest Gazm3 Posted July 24, 2006 Share Posted July 24, 2006 As the topic says. I have the current model 2006 model, 132kW turbo diesel in the pathfinder, and it has travelled just over 5000km now (3000mi). I was curious as to weather you can safely up the turbo boost by a few PSI, by bleeding off from the wastegate actuator vaccum line. Is thier any inbuilt defences that the engine computer has to this practise? Will the engine computer compensate the fuel mixtures for the slightly increased boost? The pathfinder has pretty decent torque, but i guess a little bit more will be most welcome thanx in advance Link to comment Share on other sites More sharing options...
Guest Gazm3 Posted July 26, 2006 Share Posted July 26, 2006 ??? anyone. noone does this. hope they do cos more torque would be very welcome Link to comment Share on other sites More sharing options...
vengeful Posted July 26, 2006 Share Posted July 26, 2006 Will the engine computer compensate the fuel mixtures for the slightly increased boost? I'm not too familiar with the turbo system on the diesels, but I can at least attempt to answer this one question. Usually not. You'll likely have to have the computer reprogrammed to allow for different fuel mapping to account for the higher boost levels. Also, with higher boost levels, you'll be smart to invest in a turbo timer of some sort to allow the engine and turbo to properly cool after a drive. Link to comment Share on other sites More sharing options...
Guest Gazm3 Posted July 26, 2006 Share Posted July 26, 2006 thanx for reply. Mabee they have fuel mapping for a few extra psi. hehe im not familiar with TD engines, but have doen this before on petrol ones. Normally if it runs MAF based tune it will work, but if it runs emulated MAF or AlphaN speed denisty tune it wont Well may be safter to do on dyno. whats Ideal mixture settings for wide open throttle on turbo diesel's Link to comment Share on other sites More sharing options...
Filthy Luker Posted July 26, 2006 Share Posted July 26, 2006 Get a boost gauge, and crank it 2-3 psi. Nothing more. You should be alright without anything added. If it was me I wouldn't touch it tho. You bought a truck not a race car. Link to comment Share on other sites More sharing options...
Guest Gazm3 Posted July 26, 2006 Share Posted July 26, 2006 im a compulsive car fiddler thou.. A few psi is prob not gunna do any harm thou Link to comment Share on other sites More sharing options...
vengeful Posted July 26, 2006 Share Posted July 26, 2006 Do you know what the stock boost level is? I know they're considerably higher on diesel motors than gasoline motors, but don't know what this one is. I have a co-worker who has a Powerstroke Turbodiesel Ford F-350...the thing is GIGANTIC. It's ridiculous...but he runs 70psi of boost and makes 900ft-lb of torque at idle. Granted, he's also dumped a ludicrous amount of money in the engine of this thing...it'll tow a house. Link to comment Share on other sites More sharing options...
navygz19 Posted July 26, 2006 Share Posted July 26, 2006 It's ridiculous...but he runs 70psi of boost and makes 900ft-lb of torque at idle. There's entirely no reason for anyone to need that much power in a truck. Link to comment Share on other sites More sharing options...
vengeful Posted July 26, 2006 Share Posted July 26, 2006 There's entirely no reason for anyone to need that much power in a truck. Well, I never said it wasn't excessive! He does have a 45' 5th wheel boat trailer that he pulls with it....with that much power, it feels like there's nothing back there. Link to comment Share on other sites More sharing options...
sw Posted July 26, 2006 Share Posted July 26, 2006 70psi :o :confused: excessive is an understatement Link to comment Share on other sites More sharing options...
Guest Gazm3 Posted July 27, 2006 Share Posted July 27, 2006 There's entirely no reason for anyone to need that much power in a truck. hehe too much power is never enough. Dont know if the std compressor is capable of that thou. ill wack a boost guage on it and tell what it runs std.... my non scientific guess is 10psi any other guesses / bets taken ahhahaha Link to comment Share on other sites More sharing options...
geordie4x4 Posted August 2, 2006 Share Posted August 2, 2006 Gazm3, As I understand it, the new 2006 TD has a lot of electronic control over the turbo boost, fuelling and the variable outlet nozzle. You may find that trying to override the waste gate confuses the computer and actually reduces power (emergency override). There are several brands of ad-on computer control chips, DTronic or Safari (from ARB) and Diesel Power www.dieseltuning.net.au. These are plug-in units that can get the computer to increase boost and fuel by fooling it, feeding it bogus information of boost, exhaust oxygen, fuel setting, revs etc. Some of these claim power gains of 30% or more. Some are reprogrammable so that you can plug in the laptop and see what the settings are then increase as you desire. If you want more than this (30%) from a plug-in chip, then have a look at Diesel - LP Gas conversions. www.dieselgas.com.au Have fun Geordie Link to comment Share on other sites More sharing options...
geordie4x4 Posted August 3, 2006 Share Posted August 3, 2006 (edited) Gazm3 also see this link to the Pathfinder Club of Australia (POCA) there are lotts of enthusiastic Ausie owners of the 2006 diesel. http://pcoa.org.au/forumtemp/viewtopic.php?t=437 Edited August 4, 2006 by geordie4x4 Link to comment Share on other sites More sharing options...
Guest Gazm3 Posted August 4, 2006 Share Posted August 4, 2006 thanks mate....just the info i was after. ill have a look at that link now Link to comment Share on other sites More sharing options...
TruBlu Posted October 21, 2007 Share Posted October 21, 2007 I know this is a little late but you can safely crank the boost up via the wastgate actuator. You will need to increase your fuel supply rate though by using a Rising Rate Fuel Pressure regulator that fed from your BOV/BPV. This will take diesel that would normally be returned to the tank and reroute it back to the engine to cope with the extra air be pumped into the engine. Link to comment Share on other sites More sharing options...
ardavis78 Posted November 21, 2007 Share Posted November 21, 2007 All i can tell you is use an electronic boost controller instead of a manual one...I've had a problem with manual boost controllers bleeding and giving me spikes....I have a friend who has a mid 90's dodge 4x4 with a cummins diesel....stacked twin turbos pieced together from peterbilts, and an intercooler donated from a kenworth. 1400lb. ft. torque / 800 hp. He machined his own parts. Stock stroke/displacement/cam. We can be going 70 mph and stab the gas and the tires easily break loose...it's stupid....hi 10's in the 1/4 mile Link to comment Share on other sites More sharing options...
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