Yanmar 6LP IP on 1HD-T

[AussieHJCruza]

Well, the title says it all - I believe th 6LP pump is a 14mm pump, and I believe that the two engines are similar - has anyone got any ideas if this will or won't work?

Is this a bad idea...

Please offer your suggestions and comments

 

[CycloSteve]

Try @Jan-78FJ40 as he has experience with the 1HD-FT equivalent Yanmar motor.

 

[AussieHJCruza]

I have just found out the pump in question is off the 250 hp engine. Would there be any advantages over a stock LC pump fuel wise?

 

[IanB]

I have just found out the pump in question is off the 250 hp engine. Would there be any advantages over a stock LC pump fuel wise?

Stock 1HD-T is 162hp...so maybe, lol.

 

[AussieHJCruza]

The stock LC fuel pump will take me to 250ish hp, so I guess what I'm trying to work out is if thi pump has has capacity to deliver more fuel or if it's the same pump 'turned up' a bit. I'm thinking it's a (for want of the correct term) higher flo pump

 

[Tapage]

the advantage on IP Yanmar settings relays in the big and almost infinite amount of " fresh " cool water to cool the engine ..

 

[mudgudgeon]

The stock LC fuel pump will take me to 250ish hp, so I guess what I'm trying to work out is if thi pump has has capacity to deliver more fuel or if it's the same pump 'turned up' a bit. I'm thinking it's a (for want of the correct term) higher flo pump

Yes the yanmar pump delivers more fuel. And Im pretty sure they are a bolt in swap.

Question is, is it tuneable for your application.
As tapage said, it's built for marine use, so you have 1/2 an ocean supplying cool water constantly.

14mm doesn't sound a lot bigger than the 13mm plunger being used in upgraded pumps, but the increase is actually a pretty large change. You may find it untuneable

 

[AussieHJCruza]

That was the concern - whether it would actually be tunable on a road going engine.

Dunno, is it worth a shot?

 

[mudgudgeon]

12mm plunger is 113mm2 surface area
13mm plunger is133mm2, 17% increase on stock
13mm plunger is 154mm2, 36% increase on stock, 16% increase on 13mm.

No idea how that actually translates to fuel delivery?
Has anyone has maxed out a 13mm pump? 14mm could be overkill?

 

[Jan-78FJ40]

I have a Yanmar 6LP in my truck that was originally a Marine application. The engine is almost identical to the 1HDFT, and has 1HD stamped on it. It is made by Toyota. Differences that are easily swapped to 1HDFT specs:
Manifolds, cooling system, injection lines, timing cover, throttle linkage, a bunch of sensors, and some other small stuff that I am forgetting. All is bolt on for the 1HDFT stuff.
The injection pump needs to be speed for a truck application. I got a g-Turbo when I did this engine, and my injection shop had no problem adjusting the pump to the fuel aspects provided by Graeme. The truck runs cool and has great power, so no complaints. Fuel economy is good too, so I doubt I am over fueling.
The pump housing is also standard, and can be swapped against one that has room for the rpm sensor.
HTH
Jan

 

[Tapage]

Jan-78FJ40 that's hell of info ..

Did you happen to know how much power are you making now ...

Boost / EGT's / AFR .?

Did you happen to know if your Injection Shop " de tunned " the IP .. ?

 

[Jan-78FJ40]

Jan-78FJ40 that's hell of info ..

Did you happen to know how much power are you making now ...

Boost / EGT's / AFR .?

Did you happen to know if your Injection Shop " de tunned " the IP .. ?

205 hp at the wheels at 2200 rpm.

Max boost 18psi from 2200 rpm on (I never rev it higher than 3500)

Max EGTs (running a long straight uphill in 5th at 80mph) is 1150 pre and 850 post (I have an intercooler as well)

Don't know AFR, but I'd love to. I think it is still running too rich, as there is black smoke when I accelerate as hard as possible.

I had to add a xii clutch, as the stock one would slip under acceleration.

Yes, the pump was de-tuned. It pushed way too much fuel for the non-marine application and the engine would overheat rapidly. The 6LP in boats is rated at 315 hp. As mentioned, it is cooled by enormous water intakes that cool the engine and also wrap around the intake and exhaust manifolds.

cheers,
Jan

 

[Jan-78FJ40]

I forgot to add something to the differences between 6LP and 1HDFT: The head is drilled and tapped differently for the valve cover. It has twice the umber of bolts for the valve cover, I assume to ensure better sealing.
J

 

[Locked79]

I forgot to add something to the differences between 6LP and 1HDFT: The head is drilled and tapped differently for the valve cover. It has twice the umber of bolts for the valve cover, I assume to ensure better sealing.
J

Maybe drilled and tapped like the FTE which has more bolts than the FT. The FT cover still fits, just have to plug the unused holes to ensure no oil leaks.

 

[Jan-78FJ40]

Maybe drilled and tapped like the FTE which has more bolts than the FT. The FT cover still fits, just have to plug the unused holes to ensure no oil leaks.

That is well possible. But the FT valve cover gasket will not seal, I know that for a fact.
cheers,
Jan

 

[Beka]

205 hp at the wheels at 2200 rpm.

Max boost 18psi from 2200 rpm on (I never rev it higher than 3500)

Max EGTs (running a long straight uphill in 5th at 80mph) is 1150 pre and 850 post (I have an intercooler as well)

Don't know AFR, but I'd love to. I think it is still running too rich, as there is black smoke when I accelerate as hard as possible.

I had to add a xii clutch, as the stock one would slip under acceleration.

Yes, the pump was de-tuned. It pushed way too much fuel for the non-marine application and the engine would overheat rapidly. The 6LP in boats is rated at 315 hp. As mentioned, it is cooled by enormous water intakes that cool the engine and also wrap around the intake and exhaust manifolds.

cheers,
Jan

Hi!

Do you know boost pressure for LP6 when it's on boat not de-uned as you have done?

 

[Beka]

Another question, which turbine you run? From LP6 or from toyota?

 

[roma042987]

Another question, which turbine you run? From LP6 or from toyota?

He mentioned above he is running Graeme G-turbo. I have family in St. Petersburg. Ya is Rostova na donu

 

[Beka]

He mentioned above he is running Graeme G-turbo. I have family in St. Petersburg. Ya is Rostova na donu

Спасибо!

 

[dlonza]

I have a Yanmar 6LP in my truck that was originally a Marine application. The engine is almost identical to the 1HDFT, and has 1HD stamped on it. It is made by Toyota. Differences that are easily swapped to 1HDFT specs:
Manifolds, cooling system, injection lines, timing cover, throttle linkage, a bunch of sensors, and some other small stuff that I am forgetting. All is bolt on for the 1HDFT stuff.
The injection pump needs to be speed for a truck application. I got a g-Turbo when I did this engine, and my injection shop had no problem adjusting the pump to the fuel aspects provided by Graeme. The truck runs cool and has great power, so no complaints. Fuel economy is good too, so I doubt I am over fueling.
The pump housing is also standard, and can be swapped against one that has room for the rpm sensor.
HTH
Jan

I have a Yanmar 6LP in my truck that was originally a Marine application. The engine is almost identical to the 1HDFT, and has 1HD stamped on it. It is made by Toyota. Differences that are easily swapped to 1HDFT specs:
Manifolds, cooling system, injection lines, timing cover, throttle linkage, a bunch of sensors, and some other small stuff that I am forgetting. All is bolt on for the 1HDFT stuff.
The injection pump needs to be speed for a truck application. I got a g-Turbo when I did this engine, and my injection shop had no problem adjusting the pump to the fuel aspects provided by Graeme. The truck runs cool and has great power, so no complaints. Fuel economy is good too, so I doubt I am over fueling.
The pump housing is also standard, and can be swapped against one that has room for the rpm sensor.
HTH
Jan

Hi All
New to the forum, I have recently installed a 1HDFTE with a mechanical pump (yanmar 6lp) into an 80 series with g turbo and intercooler. I have 2 questions
1: what timing plunger stroke did you set your pump to?
2: I don't currently have a working tacho and was wondering if the pump housing can be drilled and tapped to accomodate a 1HDFT rpm sensor or if it would be easier to salvage a second body?? I have included a photo of the pump details and converted engine, your thoughts appreciated.