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Did you have the dimensions of the PDI intercooler by any chances?
I wish I did. I do not have that data for two reasons:Curious to know before and after fuel economy.
From the PDI link posted earlier:
"Our first released PDI Landcruiser HDJ79 Front Mount intercooler kit had a 600x240x65mm core and now we have managed to fit a 76mm thick core behind the factory grill (with a bit of slimming to the plastic), which for many who have considered the custom install to be impossible. The pipework is also 2 1/2” stainless steel for improved flow and durability. Note stock levels of the 76mm core have been depleted and we have 65mm cores"
Roughly 24"x10"x3" (if its the 76mm)
I appreciate your kind words. I hope it helps you out. The PDI install was a learning curve that could have saved me a week or so with a write up like this.nice write up thanks for taking the time to share
any reports on how everything has been working / performing
I appreciate your kind words. I hope it helps you out. The PDI install was a learning curve that could have saved me a week or so with a write up like this.
The guys at PDI were great to work with. Thank you for any feedback you gave them. My install went perfectly in terms of the PDI design. It was all the other stuff that broke in the process, through no fault of PDI.Very nice write up, wish I had this when I was doing the install on my 77. I experienced all the same issues, I was PDI's guinea pig for a 77 install. I provided them a bunch of feedback and they claimed they would modify the kit to suit a 77, guess that never materialized.
Now if you really want to get the full potential out of the PDI I/C, put an FT engine around it.
Look into a less restrictive airbox, it is your limiting component now. Rig up a vacuum gauge on the turbo inlet, mine was pulling vacuum at full boost, upgrading the airbox made a huge difference.
I had seen the PDI version also- looks good. I'll be very interested in what you find out. I have a LHD 24v truck so there is a battery in that general area. I guess the deciding factor for me would be if any of the above air boxes fit in the same real-estate as the stock air box and do not interfere with the battery.@Loober @svsisu those look great. I also found one by PDI, where I bought the intercooler.
PDI Landcruiser HDJ79 Airbox HDJ79/HZJ75 Series
The PDI Landcruiser HDJ79 Airbox is designed for max power potential. In stock and ready to ship Cast alloy lid and box – moulded for optimised flow and resistance to distortion. Precision machined on sealing surface. for a dust proof seal. 4” inlet and 4”outlet - to maximise airwww.performancedieselintercoolers.com.au
Reaching out to all those sources today (tomorrow Australian time).
Torfab (@NookShneer) has a high flow box on their site
Diesel Air Box » Torfab » The NW destination for Everything Land Cruisers parts and service, including complete one-off custom built Cruisers, maintenance, suspension, and expedition builds
The NW destination for Everything Land Cruisers parts and service, including complete one-off custom built Cruisers, maintenance, suspension, and expedition buildstorfab.com
I don't know if it fits or if they have brackets for the 70 series, but might be worth looking into.
@Loober @svsisu those look great. I also found one by PDI, where I bought the intercooler.
PDI Landcruiser HDJ79 Airbox HDJ79/HZJ75 Series
The PDI Landcruiser HDJ79 Airbox is designed for max power potential. In stock and ready to ship Cast alloy lid and box – moulded for optimised flow and resistance to distortion. Precision machined on sealing surface. for a dust proof seal. 4” inlet and 4”outlet - to maximise airwww.performancedieselintercoolers.com.au
Reaching out to all those sources today (tomorrow Australian time).
The 1HZ injection pump only came with one quick adjustment - the fuel screw. This screw increases or decreases the fuel across the board (i.e. at idle, at WOT, off boost, and on boost, etc.). This single screw does not offer enough adjustment when a turbocharger is added.
View attachment 3161915
The solution is to add a device called a Boost Compensator. This allows the fuel to ramp up or ramp down as boost changes. This article explains this much better than I can.
' Basic HOW TO - Mechanical Diesel Engine Tuning Guide - https://www.tillix.com.au/mechanical-diesel-engine-tuning
Toyota made several different Boost Compensators, and all fit. Here is a thread discussing the various Boost Compensator options.
' HZ/HD Boost compensator question/confusion - https://forum.ih8mud.com/threads/hz-hd-boost-compensator-question-confusion.1128520/
By the time I started this project, only one compensator was still readily available (22540-17260). I also grabbed a new gasket (22774-54270)
View attachment 3161942
I also ordered the Trundles Automotive taller cap, pin, and spring. Here is a comparison of all.
View attachment 3161966
View attachment 3161961
View attachment 3161972
The support from Trundles Automotive in New Zealand was absolutely outstanding. They answered questions via email quickly and concisely.
With that said, I do believe the Trundles setup to be overkill on this 1HZ engine. It requires removing the star wheel and adjusting via different springs. Also, the threaded rod must be cut down, which I did. If I had to do it all over again, I would stick with the stock setup. The Trundles system is more geared toward HD engines making big power.
View attachment 3161985
View attachment 3162023
Again, all of this is unnecessary on the 1HZ engine. Keep the original cap and star wheel setup and save the Trundles system for the big boys running big power.
The spring tension must be adjusted to match the max boost, in this case 15psi. There are two methods to do this. First, buy a MityVac MV8510.
View attachment 3162001
METHOD 1 (from the top) - this is the only option if the boost compensator is already installed on the pump. This video explains it pretty clearly.
METHOD 2 (from the bottom) - if the Boost Compensator is off, this method is far easier. Watch the video above and then apply the principle from the bottom. No paint pen required.
View attachment 3162002
Once the spring tension had been properly calibrated, I installed it on the truck and modified the banjo fitting following this thread.
' Builds - 1985 BJ70 Story and Modifications - https://forum.ih8mud.com/threads/1985-bj70-story-and-modifications.608045/post-11016865
View attachment 3162007
According to Gturbo, you don’t need it. They have a tuning guide all for the stock compensator for their turbosthanks for sharing the details!!!
Grrrrrr I totally missed ordering the VE springs when I ordered from Trundles i plan to be running anywhere between 18-25psi of boost I'm wondering if i really need the 2.6mm spring or if I'm just fine with the factory spring?