Supercharged p38

[mtb_gary]

Here's one of a rare group. Apparently Eaton made around 50 supercharger kits exclusively for the p38 (for around $20k a piece!) this one has one of those kits fitted.

70421

1998 Range Rover Wagon HSE supercharged | Cars, Vans & Utes | Gumtree Australia Geraldton City - Greenough | 1034714516 (http://www.gumtree.com.au/s-ad/greenough/cars-vans-utes/1998-range-rover-wagon-hse-supercharged/1034714516)

Gary

[33chinacars]

NICE Now if I had the money :D:D:D:D:D:D

[Keithy P38]

Would.go.hard.

[benji]

I remember something about an m51 charger being used.

It would go very hard indeed!

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[wayneg]

Copied from RPI Engineering warning against Supercharging Rover V8 engines


Those with supercharges, will also discover this. On most supercharged engines, Especially those using the Eaton M90), poor fuel distribution and weak mixtures eventually cause detonation that will collapse the ring grooves on the rear cylinders and cause partial engine seizure, and eventual piston breakage
eaton M90 to smal for V8 http://www.v8engines.com/images/11a-supercharger-inside-2.jpg
bad plumbing \http://www.v8engines.com/images/12a-air-flow-goes-rong.jpg
contamitaed heads
http://www.v8engines.com/images/13a-head-on-top-of-ngine.jpg

You Can easily see, that this Supercharger (the M90) is far too small for the V8 Engine as it only covers three off the 8 cylinders, all others get varied pressure and flow that cause very poor combustion. The Air flow is not good at all, as and the Air filter is mounted in the corner of the engine bay is not only lacking an intercooler, it is picking up hot air from the exhaust manifolds too, the rooting of the system is also very poor As you can see the poor fuel distribution is causing the cylinders to run progressively weaker towards the back of the engine, Also you will notice the excessive un-burnt fuel sprayed from the extra injector is causing a high carbon build on the pistons after only a few thousand miles.
These are only a few off the problems with Supercharging this engine, unfortunately we are not able to show how the lack of ECU chipping will cause the demise of the engine and how it eventually goes into default mode after trying so hard to sort out what's going wrong, however I will have further written advice on this matter soon


Website here..........http://www.v8engines.com/engine-3.htm

[Dougal]

Sounds like turbo is the way to go.

[benji]

I'm sure it could be done right. Fueling, timing, etc. should all be changed.

I wouldn't be keen on running a very high boost though. But the torque would be awesome.

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[Dougal]

There was a comp rig a few years back with a twin turbo rover V8. Body I think was a toyota.

[justinc]

mmm, a good way to heat up the incoming air and get very little low down gains, and detonate an engine...all for $20k!:o

I have driven a few Supercharged 3.9 discos, I know they are no 4.6, but the bottom end torque wasn't anything to right home about. My N/A hi compression tweaked 4.6 would've eaten it off the line...and I was running 33's


JC

[benji]

Just proves the old saying - nothing will substitute for cubes.

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[Tombie]

Just proves the old saying - nothing will substitute for cubes.

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A phrase created about the same time they said "Titanic is unsinkable"

[Keithy P38]

Definitely more of a fan of a few extra cubes over boost right here!

But that's not what this thread is about!

Cheers
Keithy

[Dougal]

Just proves the old saying - nothing will substitute for cubes.

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Turbocharging is an excellent substitute for cubic inches.
If you were to replace the 600Nm SDV6 in a D4 with a non turbo diesel it would require about 9 litres displacement.

Fuel economy, refinement and warm-up times would be abysmal.

[mtb_gary]

Back in my younger days (early 80's) I used to ski race behind a blown 454. Power output of the boat was around 850 bhp torque ??? it was phenomenal!!! Best of both worlds cubes and supercharger :D. Fuel consumption on the boat makes the Rangie seem cheap to run :o. To give you an idea running the Mildura 100 (100 kilometres) we would go through a 44 gallon drum of avgas - it was legal back then! Unfortunately, reliability was it's undoing :(.

Gary

[Dougal]

Back in my younger days (early 80's) I used to ski race behind a blown 454. Power output of the boat was around 850 bhp torque ??? it was phenomenal!!! Best of both worlds cubes and supercharger :D. Fuel consumption on the boat makes the Rangie seem cheap to run :o. To give you an idea running the Mildura 100 (100 kilometres) we would go through a 44 gallon drum of avgas - it was legal back then! Unfortunately, reliability was it's undoing :(.

Gary

Power ratings back then were all pure bull****. 454's didn't put out much power or torque at all for their displacement. Wikipedia has some sources showing 350hp at the crank and 283hp at the wheels for a 454 big-block. That's a 7.4 litre engine:

Chevrolet Muscle Car Dyno Wars - 1970 LS6 Chevelle - Super Chevy Magazine (http://www.superchevy.com/technical/additionaltech_perfdir/sucp_1102_chevrolet_muscle_car_dyno_wars/viewall.html)

320 ft-lbs and 283hp. That's 433Nm and 211kw at the wheels. A turbocharged 2 litre petrol can beat that easily.

https://www.aulro.com/afvb/images/imported/2013/12/23.jpg

It wasn't just cars either. Lawnmower power ratings were also extrapolated into fairy land.
I have a lawnmower with a true 3.5hp engine that is more powerful than any of the 4-5hp mowers I've used in the past.

[Keithy P38]

My N/A 383 small block chev makes 450hp on a street tune... The old 454 myst have been a boat anchor! Except for your blown one Gary ;-)

[Dougal]

My N/A 383 small block chev makes 450hp on a street tune... The old 454 myst have been a boat anchor! Except for your blown one Gary ;-)

The only big blocks that seem to do okay power wise are on alcohol. On normal petrol I wonder if the cylinders are just too big to get decent air/fuel mixing?

What's the 383 in? I'm guessing it spins pretty quick to deliver 450hp.

[mtb_gary]

The guy that used to build the big block was a drag race motor builder based around Dandenong. I personally would have liked the 427 because it revved better than the 454 but was out voted. The motors would only last 3-4 hours of racing then back for another rebuild. An expensive hobby! Prize money at that stage was minimal, the wet tee shirt competition actually got a bigger cash prize :D:D

Gary

[Keithy P38]

It's in a Torana. Makes max HP at 6100rpm.

I agree Gary, expensive hobby! Mines a streeter so much less potent than yours!

Cheers
Keithy