1HD-T

[natharmstrong88]

Just a quick question, Is the 1HDT direct injection, or are the 1HDFTE's the only ones with direct injection? Cos the 1HDT looks pretty much like a 1HZ with a factory turbo kit bolted on..

[dow50r]

Looks can be deceiving, the block is thesame and tappet cover/inlet/exhaust....all else is different inside, yes direct injected as all cruiser turbos from the factory are....heaps of mumbo

[dogbreath_48]

Is the 1HD-FT (mech. injected) all that much better than the 1HD-T? What month/year was the 1HD-FT introduced?

I have a mate in the market for a diesel 80...

[bad_religion_au]

Is the 1HD-FT (mech. injected) all that much better than the 1HD-T? What month/year was the 1HD-FT introduced?

I have a mate in the market for a diesel 80...

isn't the "F" mean it's a multi valve (DOHC) head? from what i've heard, they are the pick of the bunch

[dow50r]

The f actually stands for fuel efficient...they have the 4 valve per cylinder head, no bigend problems, a bigger turbo, more power and torque, first brought out 2/95 wih the new dash design in the series 3 80 series.
The 100 series hdfte is thesame motor but with electronic control pump....

[vSAHARAx]

As others have Said If factory turbo'd they are Direct Injected, all 80 series turbos were mechanically injected only the 1HD-FTE (100 series) was EFI

The 1HD-FT is deffinately the pick of the motors, Quiet, smooth, economical and goes like a scared cat when on boost....Pre boost is an absolute slug, they need to be taken to an injection specialist to have the boost compensator adjusted which will cost the whole of around $140, but makes it alot more responsive from a standing start!

Sorry to hi-jack! does anybody know the model numbers for the 1HDT And 1HDFT turbos?

I know they are from the CT26 Family but what are the model numbers?

Troy

[udm]

does anybody know the model numbers for the 1HDT And 1HDFT turbos?

there is no model # for the turbos, but the 1hdt has a "58020" stamped on the exhaust housing... and some clues get picked up visualy... and if you want more, you could strip it apart and measure the wheels.

[dow50r]

The reason the hdft doesnt go well off boost is the turbo is larger, and takes longer to come on stream....the hdt has a smaller exhaust wheel, smaller turbine housing, so it is better lower in the rev range, but as stated earlier, the hdft with larger turbo halls ass once it picks up its skirt....if you want to do the compensator yourself, the instructions can be found for free http://www.lcool.org/technical/80_serie ... p_adj.html
Its pretty easy, just do yourself a favour and invest in a exhaust pyrometer before you touch anything....you are then informed of the outcome and can make adjustments accordingly.
There are 3 or more ct26's, the hdt turbo is close to thesame one on a 2 litre mr2 or gt4..the hdft is close to the supra 3 litre ct26...both can have the larger front wheel from the supra installed to their turbos to get more boost earlier...a google of ct26 shows all the numbers and wheel sizes

[fester2au]

Seeing as we ar etalking turbo specs here now (sorry) can you guys confirm or advise if the outlet flange on the FTE is the samr shape and bolt pattern etc as the standard 80 Series turbos. I think the PO of my truck said that when they put the FTE in it they used the 80 Series dump pipe to give the correct exhaust angle as the 78/79 Series one that the engine came from was totally wrong.

If the 1HD-T has a smaller turbo I would assume the flanges don't fit or the one on mine would be extra restrictive if the bolt holes matched but the internal dimensions were smaller. Or maybe they used the 1HD-FT flange???

I have asked Beaudesert Exhausts as I'm chasing a high flow dump but she had to go and dig out the respective flanges and compare and hasn't got back to me yet, maybe you guys already know.

[bad_religion_au]

The f actually stands for fuel efficient...

got a reference for that? i always thought it had to do with the valve angle, or the angle from the intake into the valve ports. toyota's have 2 head designs, F, and Z. Z is usually for higher power, so flow more, F is usually setup for more torque, but have never seen an official or unnofficial summary

[mud4b]

Seeing as we ar etalking turbo specs here now (sorry) can you guys confirm or advise if the outlet flange on the FTE is the samr shape and bolt pattern etc as the standard 80 Series turbos. I think the PO of my truck said that when they put the FTE in it they used the 80 Series dump pipe to give the correct exhaust angle as the 78/79 Series one that the engine came from was totally wrong.

If the 1HD-T has a smaller turbo I would assume the flanges don't fit or the one on mine would be extra restrictive if the bolt holes matched but the internal dimensions were smaller. Or maybe they used the 1HD-FT flange???

I have asked Beaudesert Exhausts as I'm chasing a high flow dump but she had to go and dig out the respective flanges and compare and hasn't got back to me yet, maybe you guys already know.

hi gavin.
the dump 100% came off my 1hd-t and bolted directly onto the 1hd-fte. i really don't think it would be restrictive as its 3" straight off the turbo exhaust housing.

cheers mark

[-Nemesis-]

The f actually stands for fuel efficient...

got a reference for that? i always thought it had to do with the valve angle, or the angle from the intake into the valve ports. toyota's have 2 head designs, F, and Z. Z is usually for higher power, so flow more, F is usually setup for more torque, but have never seen an official or unnofficial summary

My engineer was telling me about that once. The F does represent the economic design (he was talking about my 1UZ-FE as he knows all the letters.) I think it's G that represents the sporty configuration, like the old 100kw Corrollas with the 4A-GE. Z is blown; 4A-GZE is the supercharged version.........

Something like that anyways.

[-Nemesis-]

http://ourworld.compuserve.com/homepage ... gcodes.htm

[dogbreath_48]

The f actually stands for fuel efficient...

got a reference for that? i always thought it had to do with the valve angle, or the angle from the intake into the valve ports. toyota's have 2 head designs, F, and Z. Z is usually for higher power, so flow more, F is usually setup for more torque, but have never seen an official or unnofficial summary

I think only if the F (or G or J?) is in the prefix (i.e. 1FZ, 2F), it refers to the head design. The 1HD-FT probably has a similar head design to the 1HD-T, despite being multivalve. I think the second component in the name (T/FT/FTE etc) usually refers to external fitments (turbo, supercharger, EFI etc) - though what exactly the F refers to is a tricky one.

Who really knows - i'd love to be able to get my head around toyota's naming convention!

edit: dammit i spent too long typing that post! Thanks for the link nem!

[bad_religion_au]

The f actually stands for fuel efficient...

got a reference for that? i always thought it had to do with the valve angle, or the angle from the intake into the valve ports. toyota's have 2 head designs, F, and Z. Z is usually for higher power, so flow more, F is usually setup for more torque, but have never seen an official or unnofficial summary

My engineer was telling me about that once. The F does represent the economic design (he was talking about my 1UZ-FE as he knows all the letters.) I think it's G that represents the sporty configuration, like the old 100kw Corrollas with the 4A-GE. Z is blown; 4A-GZE is the supercharged version.........

Something like that anyways.

yeah my bad, i meant G when i wrote Z... i knew z = blown, because i was considering a 4ag -ze for the corolla.

interestingly, some people have been getting better performance out of the F heads than the G heads, where both are available. apparently the F designation heads also have a better intake angle for turbocharging in most cases.

[dogbreath_48]

So what does the Z denote if it's in the prefix (UZ/HZ/FZ/JZ etc?) Obviously no s/charger

[hdj105]

Seeing as we ar etalking turbo specs here now (sorry) can you guys confirm or advise if the outlet flange on the FTE is the samr shape and bolt pattern etc as the standard 80 Series turbos. I think the PO of my truck said that when they put the FTE in it they used the 80 Series dump pipe to give the correct exhaust angle as the 78/79 Series one that the engine came from was totally wrong.

If the 1HD-T has a smaller turbo I would assume the flanges don't fit or the one on mine would be extra restrictive if the bolt holes matched but the internal dimensions were smaller. Or maybe they used the 1HD-FT flange???

I have asked Beaudesert Exhausts as I'm chasing a high flow dump but she had to go and dig out the respective flanges and compare and hasn't got back to me yet, maybe you guys already know.

Well they all use the same part number gasket

[dow50r]

Seeing as we ar etalking turbo specs here now (sorry) can you guys confirm or advise if the outlet flange on the FTE is the samr shape and bolt pattern etc as the standard 80 Series turbos. I think the PO of my truck said that when they put the FTE in it they used the 80 Series dump pipe to give the correct exhaust angle as the 78/79 Series one that the engine came from was totally wrong.

If the 1HD-T has a smaller turbo I would assume the flanges don't fit or the one on mine would be extra restrictive if the bolt holes matched but the internal dimensions were smaller. Or maybe they used the 1HD-FT flange???

I have asked Beaudesert Exhausts as I'm chasing a high flow dump but she had to go and dig out the respective flanges and compare and hasn't got back to me yet, maybe you guys already know.

hi gavin.
the dump 100% came off my 1hd-t and bolted directly onto the 1hd-fte. i really don't think it would be restrictive as its 3" straight off the turbo exhaust housing.

cheers mark

Guys, the actual dump on a fte turns down, as exhaust goes inside the chassis....Beaudesert exhaust can sell you a 3.5 inch dump if you like, what you have now is no more or less restrictive, the turbo on the fte is smaller than hdft internally on the exhaust side, but has a supra sized front wheel, which is larger than hdft........
Andrew

[dow50r]

The f actually stands for fuel efficient...

got a reference for that? i always thought it had to do with the valve angle, or the angle from the intake into the valve ports. toyota's have 2 head designs, F, and Z. Z is usually for higher power, so flow more, F is usually setup for more torque, but have never seen an official or unnofficial summary

All together now.....
Brian told me, Brian told me, Brian told me so....i know everything i need to know, because Brian told me so.....

[bad_religion_au]

So what does the Z denote if it's in the prefix (UZ/HZ/FZ/JZ etc?) Obviously no s/charger

second generation maybe? the HZ after the H, the FZ after the F, the J i always thought was 1jgze etc.

[dow50r]

http://ourworld.compuserve.com/homepage ... gcodes.htm

so sometimes things dont line up, like the d is std or regular fuel, and the z is supercharged...MMMM maybe we should all have supercharged diseasals...i love the 1gz...v12 5 litre motor from the Toyota Century
Andrew

[-Nemesis-]

So what does the Z denote if it's in the prefix (UZ/HZ/FZ/JZ etc?) Obviously no s/charger

second generation maybe? the HZ after the H, the FZ after the F, the J i always thought was 1jgze etc.

I 'think' they're purely the engine codes. Anything after the - relates to the table in that link.

I'm going to see him on Friday, if I remember i'll ask if the pre '-' letters mean anything.

[vSAHARAx]

When it comes to Engine coding

The letters before " - " represents the motors family

For example

1HD-FTE......The engine belongs to the HD Family consisting of 12-24 Valve, SOHC, Direct Injected, Diesel engines, Then after the "-" Comes the fancy bits like T......FT........FTE

F= Fuel Efficient........When ever i hear F i think of valves, whether it be using a Multi-valve (4-Valve p/Cylinder) or VVT-I......F also means the valves are on a Narrow angle around 22 Degrees, As apposed to 45 Degrees on the "G" heads.

T= Turbo

E= EFI

1UZ-FE........The engines belongs to the UZ Family Consisting of DOHC-Quad Cam, 32-Valve, V8, Petrol engines

F= Fuel Efficient (design of head)

E= EFI

The numbers before the letters generally refers to Age or bottom end of the motor whether it be Block, Bore or Stroke within the engines Family. The larger the number MOST OF THE TIME means the newer the motor and changes to the block, bore or stroke.

for example:
1UZ-FE= Introduced in 1989, 4000CC, 32-Valve, Quad Cam, Petrol V8
2UZ-FE= Introduced in 1998, 4700CC, 32-Valve, Quad Cam,Petrol V8
3UZ-FE= Introduced in 2001, 4300CC, 32-Valve, DOHC (VVTI) Petrol V8

Troy

Edit: Having a really bad day when it comes to spelling and typos, so dont yell at me

[mud4b]

Guys, the actual dump on a fte turns down, as exhaust goes inside the chassis....Beaudesert exhaust can sell you a 3.5 inch dump if you like, what you have now is no more or less restrictive, the turbo on the fte is smaller than hdft internally on the exhaust side, but has a supra sized front wheel, which is larger than hdft........
Andrew

interesting. is that on the 100 series? mine was from a 79 ute and it turned out sharply to the outside of the chassis.. not down towards the outside like the 80.

cheers mark

[dow50r]

Guys, the actual dump on a fte turns down, as exhaust goes inside the chassis....Beaudesert exhaust can sell you a 3.5 inch dump if you like, what you have now is no more or less restrictive, the turbo on the fte is smaller than hdft internally on the exhaust side, but has a supra sized front wheel, which is larger than hdft........
Andrew

interesting. is that on the 100 series? mine was from a 79 ute and it turned out sharply to the outside of the chassis.. not down towards the outside like the 80.

cheers mark

Yes Mark, i was thinking 100 series...forgot yours came from a 79.

[dumbdunce]

I always thought the 'F' stood for 'Four valves per cylinder' in the variations

Z in the engine family seems to go with indirect injection, be it petrol or diesel, D is for direct injection.

and to answer the original question again, yes the 1HD-T is direct injected. interesting to note, the 1HD-FTE is also mechanically injected, everything downstream of the pump is hydro-mechanical, it is only the pump that is electronically controlled - it is a generation before full electronic diesel injection.

[fester2au]

Seeing as we ar etalking turbo specs here now (sorry) can you guys confirm or advise if the outlet flange on the FTE is the samr shape and bolt pattern etc as the standard 80 Series turbos. I think the PO of my truck said that when they put the FTE in it they used the 80 Series dump pipe to give the correct exhaust angle as the 78/79 Series one that the engine came from was totally wrong.

If the 1HD-T has a smaller turbo I would assume the flanges don't fit or the one on mine would be extra restrictive if the bolt holes matched but the internal dimensions were smaller. Or maybe they used the 1HD-FT flange???

I have asked Beaudesert Exhausts as I'm chasing a high flow dump but she had to go and dig out the respective flanges and compare and hasn't got back to me yet, maybe you guys already know.

hi gavin.
the dump 100% came off my 1hd-t and bolted directly onto the 1hd-fte. i really don't think it would be restrictive as its 3" straight off the turbo exhaust housing.

cheers mark

Thanks Mark wanted to chase up with you on that but haven't been able to get you on the phone. Just that I saw what was apparently a standard 80 dump pipe next to a Beaudesert Exhaust version and there was a big difference but now I think about it must look again maybe the standard one was from the back of the Denco version as that what he was selling the Beaudesert one from. Was certainly a big difference between them.

[dow50r]

I always thought the 'F' stood for 'Four valves per cylinder' in the variations

Z in the engine family seems to go with indirect injection, be it petrol or diesel, D is for direct injection.

and to answer the original question again, yes the 1HD-T is direct injected. interesting to note, the 1HD-FTE is also mechanically injected, everything downstream of the pump is hydro-mechanical, it is only the pump that is electronically controlled - it is a generation before full electronic diesel injection.

MMM must have been Greg then...i thought that F stood for 4 valves originally too...
The URL Nemeses posted only applies to Toy petrol motors by the looks of it...
Andrew

[vSAHARAx]

I always thought the 'F' stood for 'Four valves per cylinder' in the variations

Z in the engine family seems to go with indirect injection, be it petrol or diesel, D is for direct injection.

and to answer the original question again, yes the 1HD-T is direct injected. interesting to note, the 1HD-FTE is also mechanically injected, everything downstream of the pump is hydro-mechanical, it is only the pump that is electronically controlled - it is a generation before full electronic diesel injection.

MMM must have been Greg then...i thought that F stood for 4 valves originally too...
The URL Nemeses posted only applies to Toy petrol motors by the looks of it...
Andrew

Thats what i thought too as i figured all the motors with F in them had 4 valves p/cyl, but after talking to a few toyota buffs, and then researching on the net, found they were right.

[Ruffy]

I always thought the 'F' stood for 'Four valves per cylinder' in the variations.

You were kinda both right right.
The 'F' denotes a twin cam cylinder head in economy form
a 'G' denotes a twin cam cylinder head in sports form

As in the difference between a 4A-FE and 4A-GE.

I believe the 'Z' does denote an indirect injection system as in the 1KZ-TE verses a 1KD-FTE