Any detailed checklist for SAFELY turboing a 2H engine? (1 Viewer)

[EdenSeen]

Does anyone have a detailed checklist for SAFELY turboing a 2H engine? (if such a thing as turboing a 2H even exists)

 

[duncanrm]

I'm not a fan of turbos on 2Hs and I dont have such a checklist.. but I'll contribute that the cooling system needs to be in tip top condition, a turbo will find every weakness in your engine.

• Viscous hub in very good working order
• Water pump changed at least some point in the past few years
• OEM thermostat fitted
• Block and Heater core not muddied up from years of tap water
• Radiator in very good condition
• Fan shroud fitted
• Fresh coolant at the right mix
• Radiator cap working properly
• Overflow tank working properly
• Hoses in very good condition, including the bypass hose

 

[Gimme a 60]

The only way to safely do it is probably precups and pyrometer. Good luck.

 

[sodafeld1]

I agree with Duncan, I am not a fan of turbo on the 2h either. But I have had a pleasure meeting quite a few 2h lovers, by selling 2h parts, which is coming to an end as they are finite. It is painful to sell things you love too. Most love the lack of electricals, the simplicity and the timing cogs of the 2h. I consider the 2h a reliable and romantic engine.

Maybe half have been young diesel mechanics. Of the two most confident, one is making a 12ht from a 2h going as far as drilling extra oil squirters and modifying a tdi pump for extra juice and probably parts availability ( I pointed out the fuel line lengths would have to be fiddled with for timing). He maybe strengthening the conrods too if I remember correct. The other diesel mec is running on sump oil as fuel with 15psi boost! These guys are astronauts to a baby like me. Fearless to say the least. They don't ask questions, just go and do it.

Some others, more modest and really want to keep their cruisers, look at a mild boost around 3 psi, maybe 8psi, nothing crazy as they say.

Most recent core sale went to a fella who cooked his turbo 2h and just wants a na 2h now, learnt his lesson.

But out of 5 2h's I have stripped only 2 had good heads, the turboed ones were cracked from heat, dropped like its hot. I do not want to deal with a chinese aftermarket cylinder head, got burnt bad from alibaba, they took the money and never heard back, and so I covet the last good head I have with a kangaroo stamp..

One guru engine builder with over 6000 builds reckoned he can get more from a boosted turboed hz than a hd and much preferred it. You can still get hz heads direct from toyota, which is awesome.

Then aussiehjcruza on here and quite a few others praise the hdfte all tricked up, I mean 400hp injectors is chalk n cheese to a 2h! A few diesel specialist shops have a 40 series with a hdfte going in out the back of the shop.

But from my perspective the running costs, parts especially, the 2h suits me fine, virtually set and forget. Injector service is 1/6th the price to the hdfte injectors for example.

Best fuel economy I have got is 9l for 100km, no stopping 2-2100 rpm 90 kmh. Which certainly compares most favourably to any modern vehicle. But it is slow in the city, one day someone shall drive into the towbar at a traffic light. My na 2h reaches 92c towing 2t uphill 40 minutes during summer, if it was turboed I reckon I would have cooked her.

There are plenty who have successfully run a turbo 2h for years, the boost, egt and as duncan said the cooling is to monitored closely.
Really recommend the aussie watchdog engine guard to monitor your temp and try to find a spare head, good luck there.

If I wanted cool, fast and powerful and money was not a thing, hdfte, if money was more short, a turbo hz. But I am happy being a bit slow with the na 2h. I would love a 12ht, but parts would be very difficult to get.

Duncan is impressed with his fresh 2h, all shiny. I have noticed a bit more perk with fresh nozzles and extractors.

Bit like expecting an old dear to take up pole dancing.

 

[Indestructible 47]

@AussieHJCruza had a hj60 turbo'd that wasn't a bad rig at all. Quality Intercooler is a must, but most importantly, as with any idi turbo diesel, it will need a good lean tune.

 

[sodafeld1]

I reckon he would do a good job. Did he sell it?

 

[Dougal]

IMO the only way to safely turbo an old IDI engine is to run low boost and no extra fuel.

You will gain cleaner burn, a few percent efficiency/economy gain and cooler running engine. Any increase in fuel will increase engine loads and shorten engine life.
Engines of this age tend to already have cracked heads and pre-combustion cups. Those existing injuries tend to show themselves after any changes are made.

 

[AussieHJCruza]

@AussieHJCruza had a hj60 turbo'd that wasn't a bad rig at all. Quality Intercooler is a must, but most importantly, as with any idi turbo diesel, it will need a good lean tune.

Thanks @Indestructible 47 that was a good rig actually, good lean tune is absolutely mandatory and a cooling system that's absolutely in order before you start. Even with every possible precaution, the coolant temperature would always start to climb on a long gradient. The IDI design puts a lot more heat into the cylinder head and therefore the coolant than a DI engine. Yes it can be done reasonably reliably but it's always going to be a cooling battle.

 

[KiwiDingo]

Lol you guys don't want to see the 2H race pumps that JH Hilux builds for these then

 

[Indestructible 47]

Yeah he's been doing that for years, and yes they can make decent power as evidenced by many clips of said 2Hs on the drag strip. Not the sort of setup thats built for long term reliability though, short term fun is where there at. I think those are kinda cool but not what the average Joe wants to do when turboing the 2h.

 

[sodafeld1]

yep he is a wizard, but still, the 3 turboed 2h s i have pulled all were cooked. head useless. The two non turboed, heads were ok.

 

[EdenSeen]

I agree with Duncan, I am not a fan of turbo on the 2h either. But I have had a pleasure meeting quite a few 2h lovers, by selling 2h parts, which is coming to an end as they are finite. It is painful to sell things you love too. Most love the lack of electricals, the simplicity and the timing cogs of the 2h. I consider the 2h a reliable and romantic engine.

Maybe half have been young diesel mechanics. Of the two most confident, one is making a 12ht from a 2h going as far as drilling extra oil squirters and modifying a tdi pump for extra juice and probably parts availability ( I pointed out the fuel line lengths would have to be fiddled with for timing). He maybe strengthening the conrods too if I remember correct. The other diesel mec is running on sump oil as fuel with 15psi boost! These guys are astronauts to a baby like me. Fearless to say the least. They don't ask questions, just go and do it.

Some others, more modest and really want to keep their cruisers, look at a mild boost around 3 psi, maybe 8psi, nothing crazy as they say.

Most recent core sale went to a fella who cooked his turbo 2h and just wants a na 2h now, learnt his lesson.

But out of 5 2h's I have stripped only 2 had good heads, the turboed ones were cracked from heat, dropped like its hot. I do not want to deal with a chinese aftermarket cylinder head, got burnt bad from alibaba, they took the money and never heard back, and so I covet the last good head I have with a kangaroo stamp..

One guru engine builder with over 6000 builds reckoned he can get more from a boosted turboed hz than a hd and much preferred it. You can still get hz heads direct from toyota, which is awesome.

Then aussiehjcruza on here and quite a few others praise the hdfte all tricked up, I mean 400hp injectors is chalk n cheese to a 2h! A few diesel specialist shops have a 40 series with a hdfte going in out the back of the shop.

But from my perspective the running costs, parts especially, the 2h suits me fine, virtually set and forget. Injector service is 1/6th the price to the hdfte injectors for example.

Best fuel economy I have got is 9l for 100km, no stopping 2-2100 rpm 90 kmh. Which certainly compares most favourably to any modern vehicle. But it is slow in the city, one day someone shall drive into the towbar at a traffic light. My na 2h reaches 92c towing 2t uphill 40 minutes during summer, if it was turboed I reckon I would have cooked her.

There are plenty who have successfully run a turbo 2h for years, the boost, egt and as duncan said the cooling is to monitored closely.
Really recommend the aussie watchdog engine guard to monitor your temp and try to find a spare head, good luck there.

If I wanted cool, fast and powerful and money was not a thing, hdfte, if money was more short, a turbo hz. But I am happy being a bit slow with the na 2h. I would love a 12ht, but parts would be very difficult to get.

Duncan is impressed with his fresh 2h, all shiny. I have noticed a bit more perk with fresh nozzles and extractors.

Bit like expecting an old dear to take up pole dancing.

Thanks for all the valuable inputs.
Good to know: "I have noticed a bit more perk with fresh nozzles and extractors."

 

[BrickRunner]

IMO the only way to safely turbo an old IDI engine is to run low boost and no extra fuel.

You will gain cleaner burn, a few percent efficiency/economy gain and cooler running engine. Any increase in fuel will increase engine loads and shorten engine life.
Engines of this age tend to already have cracked heads and pre-combustion cups. Those existing injuries tend to show themselves after any changes are made.

What about injection timing, does that need adjustment when running a turbo at minimum boost like this?