Outer Limits 4x4 Board

I heard i rumour that the things run slightly lower compression in the 78's 79's than the 100series, anyone know the truth, and show a source of info, much appreciated

Ive always thought they ran more comp, because of no intercooler...i do know they run a stronger piston in the 78/79 due to the no intercooler, so theoretically, a 78/9 motor is a better starting point than a 100.
Andrew

so what would happen if you intercooled the 1HD-FTE?

The 100 series hdfte is already intercooled, the 78/79 is not. So...the 78/79 have stronger,more heat resistant pistons, so when chasing power and pushing the envelope, a 78/79 motor with intercooler should last longer with higher combustion zone temps. There is a safari intercooler kit made for the 78/79 with d tronic (i think it is safari)
Andrew

dow50r wrote:The 100 series hdfte is already intercooled, the 78/79 is not. So...the 78/79 have stronger,more heat resistant pistons, so when chasing power and pushing the envelope, a 78/79 motor with intercooler should last longer with higher combustion zone temps. There is a safari intercooler kit made for the 78/79 with d tronic (i think it is safari)
Andrew

very interesting cheers mate

The 1HZ engine is still used in the 78/79 series. Producing 121 kw with a turbo (no intercooler)

The 1 HD FTE engine is used in the 100 series. it has 151 kw, intercooled & has EFI

hjsixty wrote:The 1HZ engine is still used in the 78/79 series. Producing 121 kw with a turbo (no intercooler)

The 1 HD FTE engine is used in the 100 series. it has 151 kw, intercooled & has EFI

the 1HZ is a naturally aspirated engine.

1HZ (all) relatively unchanged since its first use in 80 series. Indirect Injected, 12 valves, mechanical injection.

1HDT found in early 80 series, Direct Injected 12valves and mechanical injection

1HDFT found in late 80 series (maybe early 100series?) direct injected multivavle head 24 valves and mechanical injection.

1HDFTE found in 100series Direct Injected, 24 valves, Electronic injection and Intercooled.

1HDFTE found in 78/79series Direct Injected, 24 valves, Electronic injection, No intercooler.

Toyota has never released a turbo 1HZ. Infact I believe all thier turbo engines right back to thier first turbo are direct injected. 12HT is direct injected turbo variant of the 2H, 13BT is direct injected turbo variant of 3B (pretty sure 13bt is direct injected).

Makes you wonder why they didnt just make all there diesels direct injection, especially the 1hz when the 1htd was so alike

shanegtr wrote:Makes you wonder why they didnt just make all there diesels direct injection, especially the 1hz when the 1htd was so alike

Im no diesel mechanic, but by what I understand is that INdirect injected motors dont have to rely on injectors been 100%, while direct injected engines need injectores to be in top shape eg (spray pattern) to combuste properly.

Just what I think... Am I right or wrong?

Ulises

But direct injection uses the fuel more efficently, so would mean less emissions

hjsixty wrote:The 1HZ engine is still used in the 78/79 series. Producing 121 kw with a turbo (no intercooler)

The 1 HD FTE engine is used in the 100 series. it has 151 kw, intercooled & has EFI

I would of deleted that post if i was you

cloughy wrote:I heard i rumour that the things run slightly lower compression in the 78's 79's than the 100series, anyone know the truth, and show a source of info, much appreciated

I thought they did too....maybe we have both been listening to the same person....or reading overlander mags...anyway Toyota specs have them as being thesame compression.

Shadow wrote: 1HDT found in early 80 series, Direct Injected 12valves and mechanical injection

1HDFT found in late 80 series (maybe early 100series?) direct injected multivavle head 24 valves and mechanical injection.

1HD-T was also used in other markets (countries) in the 100 series, however the 1HD-FT was not, only 80 series.

dow50r wrote:

cloughy wrote:I heard i rumour that the things run slightly lower compression in the 78's 79's than the 100series, anyone know the truth, and show a source of info, much appreciated

I thought they did too....maybe we have both been listening to the same person....or reading overlander mags...anyway Toyota specs have them as being thesame compression.

Me too. Can't always rely on the marketing dept. to post the correct info

Shadow wrote:Toyota has never released a turbo 1HZ. Infact I believe all thier turbo engines right back to thier first turbo are direct injected. 12HT is direct injected turbo variant of the 2H, 13BT is direct injected turbo variant of 3B (pretty sure 13bt is direct injected).

13bt is direct injected. Toyota did bring out a turbo motor that is indirect injection with a turbo and that is the 2LT, and the 1kzte
5.4 Engine Specifications
-------------------------
Legend
FUEL
ID - Indirect Injection Diesel
DD - Direct Injection Diesel
EID - Electronically Indirect Injection Diesel
T - Turbo
EFIG - Gas Electronic Fuel Injection

DISP TORQUE BORExSTROKE COMP
MODEL (CC) CYL FUEL HP@RPM FT-LB@RPM VALVES (mm) (mm) RATIO
B (GAS) 3386 6 G 85@3600 159@???? 12 OHV 84x102 6.4:1

B 2977 4 ID 80@3600 141@2200 8 OHV 95x105 21:1
2B 3168 4 ID 93@3600? 159@2200 8 OHV 98x105 21:1
3B 3431 4 ID 90@3500 159@2200 8 OHV 102x105 20:1
13B-T 3431 4 TDD 120@3400 210@2000 8 OHV 102x105 17.6:1
14B 3661 4 DD 96@3400 177@2200 8 OHV 102x112 18.0:1
15B-FT 4104 4 TDD 155@3200 288@1800 16 OHV




H 3576 6 ID 90@3600 151@2200 12 OHV 88x98 21.0:1
H 3576 6 ID 95@3600 159@2200 12 OHV 88x98 19.5:1
2H 3980 6 ID 103@3500 177@2000 12 OHV 91x102 20.7:1
12H-T 3980 6 TDD 135@3500 231@2000 12 OHV 91x102 18.6:1

1HD-T 4163 6 TDD 165@3600 268@2000 12SOHC 94x100 18.6:1
1HD-FT 4163 6 TDD 168@3600 280@2500 24SOHC 94x100 18.6:1
1HZ 4163 6 ID 135@4000 187@2200 12SOHC 94x100 22.7:1

1KZ-T 2982 4 TID 125@3600 218@2000 8 96x103 21.2:1
1KZ-TE 2982 4 EID 130@3600 213@2000 8 96x103 21.2:1

2L 2446 4 ID 72@4000 115@2200 8SOHC 92x92 22.3:1
2L-T 2446 4 TID 86@4000 139@2400 8SOHC 92x92 20.0:1
2L-TII 2446 4 TID 90@4000 159@2400 8SOHC 92x92 21.0:1