1hdft head on 1hdt block ???

[Tin]

Hi legends,

I have a blown up 1hdt (12 valves) cylinder head recently and about to order a new genuine one from Toyota. But Ive heard that its possible to put an FT head ( 24 valves) instead, just wonder if anyone else had done this before? If yes, what else do i need beside new injectors ?

Thanks y'all and stay safe....

 

[Indestructible 47]

Not 100% on the FT head on the 1HD-T, not really a whole heap of benefit in doing so unless you are going to be running 25+psi of boost. The FTE head works on the FT.

 

[BILT4ME]

Hi legends,

I have a blown up 1hdt (12 valves) cylinder head recently and about to order a new genuine one from Toyota. But Ive heard that its possible to put an FT head ( 24 valves) instead, just wonder if anyone else had done this before? If yes, what else do i need beside new injectors ?

Thanks y'all and stay safe....

May want to post in the diesel section to get the "right" group that is more knowledgeable.

 

[MonsterCruiser]

Here: post # 14 and 17:

300+ hp to the wheels from a 1hd-t?

forum.ih8mud.com

I thought I remembered a thread with more detailed information, but I didn't find anything. Maybe something on LCOOL.

 

[Ro Land]

Hi legends,

I have a blown up 1hdt (12 valves) cylinder head recently and about to order a new genuine one from Toyota. But Ive heard that its possible to put an FT head ( 24 valves) instead, just wonder if anyone else had done this before? If yes, what else do i need beside new injectors ?

Thanks y'all and stay safe....

Hi,

Did you ever find out if that's possible? I am toying with the idea myself...

Thank you.

Roland

 

[mudgudgeon]

Hi,

Did you ever find out if that's possible? I am toying with the idea myself...

Thank you.

Roland

I would suspect to get best result you'd need to do more than just the head.

Pistons, injectors, injector pump would all be specific to hd-ft
Piston bowl shape changed over the years to improve combustion.
Injector crack pressures are a lot higher in the hdft, the injection pump is different to deliver higher fuel pressures, and injection timing and fuel delivery is different too.

There'll be a bunch of small parts that are different too

 

[Ro Land]

I would suspect to get best result you'd need to do more than just the head.

Pistons, injectors, injector pump would all be specific to hd-ft
Piston bowl shape changed over the years to improve combustion.
Injector crack pressures are a lot higher in the hdft, the injection pump is different to deliver higher fuel pressures, and injection timing and fuel delivery is different too.

There'll be a bunch of small parts that are different too

Ok, i understand. Thank you for that info. It sure is a lot of change for all of 3 more HP or so. I was hoping for better air filling in the cylinder and better exhaust flushing after the combustion stroke.
I appreciate the info and your time, thank you very much!
Roland

 

[TonyP]

Many differences from 12 valve to 24 valve beside the head.
You'd be better off selling the 1HD-T and swapping in a complete FT or FTE.

 

[Ro Land]

Many differences from 12 valve to 24 valve beside the head.
You'd be better off selling the 1HD-T and swapping in a complete FT or FTE.

I like the way Toyota designs things. Not just a head but many more modifications.
Thank you Tony, i appreciate your input!