Thread: sprintex supercharger

Yes, looked at this many years ago when my uncle owned his 110 county, and then briefly revisitted it when turboing mine. Decided against for various reasons. Firstly, a diesel engine (Like any internal combustion engine) dumps a fair bit of waste energy out the exhaust, a turbocharger will utilise this to aid efficiency by increasing volumetric efficiency almost for free, Secondly, torsional vibrations are quite destructive and will, I believe (without finite element analysis), shake the sprintex to bits internally, and thirdly the advances in turbo designs such as VNT technology virtually eliminate lag, which is one of the reasons people entertain the thought of supercharging in the first place. Also, I have been told by someone who fitted an Eaton M112 to a 6.5V8 diesel in a Cruiser that he couldn't stand the NOISE the blower made, it was worse than the noise of the 6.5

JC

Originally Posted by justinc

he couldn't stand the NOISE the blower made, it was worse than the noise of the 6.5

JC

Oh wow, I love the sound, especially on those Walkinshaw commodores with the superchargers fitted. That said, I don't have to live with the sound either.

Cons:
Constant drag on the engine.
Always too much or too little boost.
Space required.
Power drain.

Pros:
It's different.

Turbos are a natural match for diesel engines, that's why all of the autmotive diesels in the world are turbocharged.

We had some Toyota 2.4 litre supercharged 6cyl diesel ex-HongKong taxi's come through for sale when I was working PNG. These were quite powerful, and very reliable, the superchargers were available reconditioned change over ex Honkers and were cheap. Toyed with the idea, but as the guy's have said, besides the hardware, turbo's are virtually free, and are easily fitted to the 4BD1. Of course, another advantage of superchargers is that they develop boost from very low engine revs and would probably be cooler running than a turbocharger. Be nice to see one fitted to a Landy Suzy though.......

Originally Posted by 1103.9TDI

Of course, another advantage of superchargers is that they develop boost from very low engine revs and would probably be cooler running than a turbocharger. Be nice to see one fitted to a Landy Suzy though.......

My Isuzu can develop 17psi at 1400rpm. The problem is, it doesn't have a heavy enough flywheel to deliver that amount of torque smoothly at that rpm. The supposed benefit of full boost and torque from idle can't be realised unless the engine is specifically built for that purpose.
It's not a supercharger/turbocharger issue, it's one of tradeoffs in engine design.

Turbos are far more efficient (hence cooler running) than superchargers are.

Japan came out with a host of super charged diesels. Mazda 323 1.7 and 626 2.2 both were vein types. toyota stuffed there 2. - 2.4 in any thing with rear wheel drive with or without a supercharger or turbo. there are just so few models brought into australia.

Originally Posted by clean32

Japan came out with a host of super charged diesels. Mazda 323 1.7 and 626 2.2 both were vein types. toyota stuffed there 2. - 2.4 in any thing with rear wheel drive with or without a supercharger or turbo. there are just so few models brought into australia.

Those Mazda's were comprex superchargers, which are actually exhuast driven like a turbo.
It's worth noting that mazda ditched that idea and is back with turbochargers.

Originally Posted by Dougal

My Isuzu can develop 17psi at 1400rpm. The problem is, it doesn't have a heavy enough flywheel to deliver that amount of torque smoothly at that rpm. The supposed benefit of full boost and torque from idle can't be realised unless the engine is specifically built for that purpose.
It's not a supercharger/turbocharger issue, it's one of tradeoffs in engine design.

Turbos are far more efficient (hence cooler running) than superchargers are.

-Yes, if full boost from idle was mentioned, it would need some major engine design modification.
-Maybe you could explain further how more heat would radiate from a supercharger for a given psi, than from a turbocharger-as far as I can see, they both compress the gas, which gives off heat, but the turbocharger relies on already heated exhaust gas to drive the turbine, whereas the supercharger is belt driven.