1HZ S/C (1 Viewer)

[SNLC]

1-HZ 4.2 L Diesel - Bullet Cars and 4WD - Australia’s Leading Supercharger Specialist

I like this!


I had a super and turbo charged Nissan Patrol diesel. It was amazing. I honestly kind of prefer a S/C over a turbo but fitted together is over the top awesome.

Just sharing since some one out there in iH8mud land my like a S/C 1HZ and here is a bolt on kit.

Cheers

 

[gerg]

Super chargers make a rear mount turbo look like a good idea. For that price why not get two!

 

[SNLC]

Super chargers make a rear mount turbo look like a good idea. For that price why not get two!

Have you ever driven a super charged diesel?

Cheers

 

[Douglas S]

Have you ever driven a super charged diesel?

Cheers

It's not exactly a popular idea (for reasons that have been discussed in this very forum). According to their own website an intercooler could be available as early as 2012!

 

[SNLC]

It's not exactly a popular idea (for reasons that have been discussed in this very forum). According to their own website an intercooler could be available as early as 2012!

Ok well I have had a super charged diesel so I can speak from a point of experience.

Cheers

 

[Douglas S]

Ok well I have had a super charged diesel so I can speak from a point of experience.

Cheers

Yours was combination super and turbo though? So you haven't experienced using a supercharger as the sole method of forced induction.

 

[SNLC]

Yours was combination super and turbo though? So you haven't experienced using a supercharger as the sole method of forced induction.

That is true but at least I have some experience with it.

The way that engine worked was the S/C boosted off the line (from idle) and the turbo kicked in at about 1200rpms and then they boosted together. So from idle to about 1200rpms it was solely the S/C boosting.

I also had a S/C on a gas engine for about 65,000 miles. I did have heat sink issues on that engine but solved them easily with a throttle body spacer.

I realize the differences and that a turbo is more efficient, I like the no lag of a S/C though and from my experience it doesn't generate anywhere near the heat of a turbo. It is also much easier to cool, oil fed S/C with a nice oil cooler pretty much takes can of that but combined with an I/C and heat is pretty much a non issue. Whereas with a turbo it is harder to control.

Any ways, the point of me posting the thread and link was simply for anybody interested in doing a S/C on a 1HZ. Since there is a kit available and a nice looking one at that it is a lot easier to do than 100% custom fitting. That manifold in the kit is really nice, far better than a lot of home made jobs I have seen. Sure $5k is a lot of cash for the kit but if you buy an Aussie turbo kit for a 1HZ you will easily be at $3-4k all said and done. So it seems like a viable option money wise when comparing the two.

Cheers

 

[mudgudgeon]

I love the idea of a supercharger. No question supercharged diesels make plenty of low down torque, and would make a big difference to a sleepy 1HZ.

Modern turbo charger can do the same, but better, and does everything else better.

Note, that advert dates back to 2012, and sprintex supercharger way longer than that. Old inefficient 1950s technology, roots blower.

The reality is, there's far more disadvantages with a supercharger vs modern turbo charger. Dollar for dollar, turbo charger has better bang for buck overall

I started nutting out how to fit an Eaton m90 supercharger, and compounded turbo on a 1HD-T about 10yrs ago.
I had the supercharger, and turbo, and started drawing adapters, calculating drive ratios for pulleys, and sourcing parts.

The more I looked into it, the less appealing it became. I also looked at sprintex offerings too. The unit recommended for a 1HZ was too small IMO. They are a roots blower, extremely inefficient

About the only selling point for a supercharger is torque from idle.
I recently fitted a 1HD-FTE turbo to my HZ, it boosts with loads of torque from around 1200rpm.
The 1HZ is a high compression engine that has pretty good torque from idle. on road, the torque below 1200rpm really only comes into play on 1st gear at sub walking speed (take off from standing start, or parking etc) They have a reputation for having good torque for crawling road.

A turbo has completely transformed my 1HZ, and I went a budget, used OEM turbo. A more modern turbo has even more potential.

Heat from a turbocharged system comes from two things.
burning more fuel to make more power.
Compressing air generates heat. The more efficiently you do this, the less heat is generated.

there's no such thing as a free lunch. Supercharging also needs fuel added to make more power.
Supercharger also compresses air, but does it at far worse efficiency, so generates more heat which is added to the combustion cycle.

No doubt a turbo creates more radiant heat in the engine bay as hot gas passes through, and heats the turbine housing before it can escape out the exhaust.

 

[gerg]

Supercharger compressors have very limited maps and at their best run at efficiencies far below any turbo other than one that sucked in a bucket load of sand perhaps. Increasing boost on a turbo is a turn of a screw. Increasing boost on a supercharger means changing pulleys out at signifigant cost and limited selection. Max boost on super chargers is pitifully low compared to a turbo. Part load parasitic draw on superchargers is the same as WOT parasitic draw which kills fuel economy. The list of negatives keep on going. The only reason to run a turbo with a supercharger is to make up for the supercharger limitations. The only thing better than a turbo supercharger is a turbocharger by itself. I size my turbos to boost off idle and still give a great operating range. Where is the supercharger advantage? I seem to be missing it. 5000$ for 40% increase over stock is nothing to use as a marketing plug. It's downright shameful.

 

[GTSSportCoupe]

I had a 1987 MR2 with a smallport (late spec japanese) 4agze supercharged engine swapped into it. I did everything under the sun to make the most power possible with that motor. I got it up to around 200hp which is very good for that particular motor. Honestly, I did love the roots supercharger around town. Was super fun with 0-60 around 5sec on street tires. But on the highway it really showed it's inefficiencies. Now owning a turbo charged vehicle I can appreciate the differences. Back in the day, people used to twin charge the MR2 (turbo and roots supercharger). They did this because the old turbos took a long time to spool. However new turbos are much better and spool so quick, the benefit of the supercharger is lost after the first second or less. I do want to have a sports car like that again, but will definitely go with a turbo setup this time.

 

[bjowett]

The efficiency of the modern roots Supercharger is growing by leaps and bounds. The old Eaton M Series is quite far down the list when compared to the newer TVS R Series, which is due to be outdone by the new V Series. The Aisin AMR Series is also old tech, but effective up to a point. Look up some of the maps for the TVS, compare to the old M and the gains can be seen.