Builds Back in a 60 series - 1HZ Swap (1 Viewer)

[davegonz]

Maybe. I want to install a wide band AFR gauge before I do that.

I keep hearing/reading that boost doesn't kill the 1HZ, it's the EGT's and not tuning the AFR's right.

 

[GLTHFJ60]

I've not heard of most people tuning based on AFR for a diesel, it's usually based on boost and EGT. AFR would get you a similar result, it's just a different metric than most use.

 

[davegonz]

Yeah, it's all related.

Taken from the Berrima Diesel Service Facebook page (Aussie).

DIESEL TUNING AND AIR FUEL RATIO (AFR)

Air-Fuel Ratio (AFR) is extremely important and often misundertood. If you’re getting your diesel engine tuned or considering increasing the power of your diesel, it’s important to consider the exhaust gas air-fuel ratio (AFR)

AFR is the mass ratio of air to fuel present in an internal combustion engine. It is an important measure for reducing pollution and performance tuning. AFR is commonly misunderstood, but it is extremely important if you are towing a heavy caravan or have a heavily loaded motorhome.

I have many years experience in tuning. It is best said that a diesel begins to smoke when the AFR gets below 15-14:1 for a non-turbo and 16-15:1 for a turbo-diesel.

Remember, a diesel doesn’t need a perfect AFR to run and operate, but a petrol engine cannot run much either side of its perfect AFR of 14.7.

In a diesel, too much fuel (a low AFR) means smoke and engine heat. Not enough fuel (a high AFR) means clean running and lower engine temperatures. The following is a guide for tuning diesels.

A non-turbo diesel, such as a Toyota Coaster with 1HZ engine, would generally be tuned in between 15-16:1. This means it is running just on the clean side of exhaust emissions. Any lower in AFR and it may begin to smoke. An aftermarket turbocharged diesel, such as a Toyota LC100 with 1HZ engine, would be best running at around 19-20:1 AFR or higher under full load. The reason for the higher and leaner (oxygen rich, fuel lean) AFR in this application of aftermarket turbo is so that you know the engine will last for a very long time at that exhaust gas level. While it turbos safely, it wasn’t made for turbocharging. A factory turbocharged diesel, such as a Toyota LC100 1HD-FTE or an Isuzu N Series, would be running an AFR from new of about 20-22:1 or higher under load. While you may get a tune up performed or a chip fitted on your diesel, always make sure you check what the AFR reading is before and after. So often I hear about big power gains had from a diesel tune or performance modification. Then I find out that there were no AFRs supplied to support the gains and changes made. Remember, for the safety of your diesel always ask for the behind the scenes figures. These include the AFR, to assure you really know ‘how’ the power was achieved.

 

[GLTHFJ60]

I'm familiar with AFR and it's use, but this is the important thing from your example:

"Remember, a diesel doesn’t need a perfect AFR to run and operate, but a petrol engine cannot run much either side of its perfect AFR of 14.7."

My point is that tuning with boost/EGT gauges, and looking for visible smoke, is sufficient. This isn't an electronic engine where you can tweak with real granularity, you use screwdrivers

 

[davegonz]

Yeah, I know, but there are a ton of posts from 1HD-T/1HZ-T owners primarily from Oz that tune with AFR's. The downside for me is not having access to a dyno to really take advantage of the gauge.

 

[Tapage]

I've not heard of most people tuning based on AFR for a diesel, it's usually based on boost and EGT. AFR would get you a similar result, it's just a different metric than most use.

AFR it's good .. you can make good power and be well over 22 if economy it's your target ..

 

[davegonz]

Economy, power and reliability. LOL! Sounds like I want a unicorn.

 

[bottombracket]

Some would say that a left hand drive, five speed, intercooled turbo diesel 60 with air-conditioning is indeed a unicorn.

And with a dorkel....now that’s just extra awesome...

 

[davegonz]

OK, I had 30 minutes of me-time in the shop last night and got Galen's Euro mirrors installed. I think they look great. They'll match the blacked out grill and the black rims.

 

[dogfishlake]

OK, I had 30 minutes of me-time in the shop last night and got Galen's Euro mirrors installed. I think they look great. They'll match the blacked out grill and the black rims.

View attachment 1820809

Loving the build, very helpful for me too.

Those are 70 series mirrors, correct? I like them but where do I go looking for them for my truck? Thanks

 

[davegonz]

TheyreT be 60 series Euro market mirrors. I think Jason @TRAIL TAILOR was selling some a while back .

 

[davegonz]

Here you go: 60 Series Euro Mirrors and Gaskets

 

[dogfishlake]

Here you go: 60 Series Euro Mirrors and Gaskets

Cool, Thanks.

 

[tucker74]

When do I get a ride?

 

[davegonz]

Come on over.

 

[davegonz]

I just finished installing the new speedo cable from Kurt @cruiseroutfit. It was pretty easy except for that damn grommet. Oh, just incase you're wondering, the cable comes with a new grommet and it is reasonably priced .

 

[augirthedude]

Here you go:

Auto Meter 2888 Performance Tachometer https://www.amazon.com/dp/B000CIJ4AM/ref=cm_sw_r_cp_apa_PL1YBbZ1J15TA

I’ve got my tach and installed ... works well and I was only 50 rpm off of calibration. Thanks for the info.

 

[davegonz]

Weekend update....

I decided to run the exhaust out the side, but made sure I can easily undo it and go over the axle. I need to buy new shocks and tires before I do that.

 

[davegonz]

I also was able to pull the fill tube and removed the restricter. I drilled out the spot welds and then welded the holes shut. I can now fill the tank with diesel!

 

[bottombracket]

Not to mention that the h55 was shifted into 5th gear for the first time in its entire life!