Supercharging a 4BD1

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Originally Posted by Blknight.aus

they are if you shorten the exhaust cam close ramp timing a couple of degrees :) (and up the ratio on the blower)

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Originally Posted by c.h.i.e.f

Shame about the weight of the buggers though....trying to find a alloy one would be near impossible I'd imagine...

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I might have a lead to a couple... came about after a conversation that may or may not have started out about a mechanic for an armoured corps unit with M113A1 apc and LR 110 prenties who may or may not have had a few and might or might not have been queried about fitting the engine from the bucket that might or might not have been getting a pack change into the engine bay of the FFR that could or could not have had the engine out for a rear main...

It may have actually fit between the rails and under the bonnet once the exhausts were off...

but thats just some wild speculation, It certainly doesnt sound too much like anything I'd get involved with....

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Originally Posted by Blknight.aus

I might have a lead to a couple... came about after a conversation that may or may not have started out about a mechanic for an armoured corps unit with M113A1 apc and LR 110 prenties who may or may not have had a few and might or might not have been queried about fitting the engine from the bucket that might or might not have been getting a pack change into the engine bay of the FFR that could or could not have had the engine out for a rear main...

It may have actually fit between the rails and under the bonnet once the exhausts were off...

but thats just some wild speculation, It certainly doesnt sound too much like anything I'd get involved with....

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LOL....
well it looks like you may or may not be onto a futre project then.
would be interesting to see pics but i know that would not be a good idea on your mates side as they probably dont like pics taken of that sort of stuff.

Upgraded to a 6V92TA - just sold, but went like the clappers - ex Greyhound

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Originally Posted by c.h.i.e.f

Shame about the weight of the buggers though....trying to find a alloy one would be near impossible I'd imagine...as the rest said it's not a true supercharger it relies on scavenging effect pressurized sump etc etc...only bad thing I've heard about them is run on from oil ingress but they sound so good :twisted:

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Aluminium 3-53 & 8V71's were made for the US Army for snow tractors and other low ground pressure weight sensitive applications. Getting a bit rare nowadays.

Joe Hawkes at Airlie Beach has an ally 3-53 module engine, radiator clutch & 4 speed trans mounted on a frame. Brand new too. Problem is Joe rarely sells anything, preferring to accumulate.

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Originally Posted by Lost Landy

G,day guys just asking if any one has supercharged there 4BD1 and if so what type of supercharger did you use? Not iterested in turbocharging my engine as dont really what the hasstle of fitting an intercooler and all the dramas with heat and high exhaust temps.

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Have a talk to Mike Vine in Brisbane. He does a turbo setup for the 4BD1 that doesn't require intercooling. The turbo (garret T3) is mounted on the drivers side under the inlet manifold and in reverse to the normal turbo position (i.e. the compressor on the forward side and turbine on the rear. This keeps intake temperatures considerably cooler that the standard setup. I have this setup on mine and my exhaust temps are lower than others that I have driven with the turbo mounted in the standard position on the exhaust manifold.

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Originally Posted by Lost Landy

G,day guys just asking if any one has supercharged there 4BD1 and if so what type of supercharger did you use? Not iterested in turbocharging my engine as dont really what the hasstle of fitting an intercooler and all the dramas with heat and high exhaust temps.

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I have run a set of calculations recently for a toyota diesel that was going to be supercharged. The results show it's a waste of time.
The poor efficiency of superchargers results in poor charge density (i.e. requires a lot of supercharger boost to deliver any decent increase in air-flow) and the power they suck from the crank damn near eats all the power you get.

Conclusion: Superchargers only work well on petrols where low boost is required and the evaporation of the fuel in the intake does a lot of cooling for you. Even then your fuel economy is slaughtered. It takes a similar amount of power to drive the supercharger at 2000rpm as it does to push the vehicle at 100km/h.
Which is why there are no supercharged diesels on the road.

Why do you think you need intercooling and high exhaust temps with a turbo?
Turbocharging reduces exhaust gas temperatures and intercooling is only needed at high boost. I am currently running 24psi max on my 4BD1T with no intercooler. My hottest exhaust temps are the same as a non turbo 4BD1.

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Originally Posted by Brian Hjelm

Aluminium 3-53 & 8V71's were made for the US Army for snow tractors and other low ground pressure weight sensitive applications. Getting a bit rare nowadays.

Joe Hawkes at Airlie Beach has an ally 3-53 module engine, radiator clutch & 4 speed trans mounted on a frame. Brand new too. Problem is Joe rarely sells anything, preferring to accumulate.

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far out brian you just had to tease all of us :(:D i have a mate with a collection of them but he is like the fella you mentioned and will not part company even though they just sit there :( no alloy ones though ...

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Originally Posted by Bearman

Have a talk to Mike Vine in Brisbane. He does a turbo setup for the 4BD1 that doesn't require intercooling. The turbo (garret T3) is mounted on the drivers side under the inlet manifold and in reverse to the normal turbo position (i.e. the compressor on the forward side and turbine on the rear. This keeps intake temperatures considerably cooler that the standard setup. I have this setup on mine and my exhaust temps are lower than others that I have driven with the turbo mounted in the standard position on the exhaust manifold.

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Why do you think your setup does not require intercooling?

Have you measured intake temps compared to other setups?

Based on (simple) some calcs I did a while back, and system with greater than 3-5 psi Boost will benefit from an intercooler.

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Originally Posted by Bearman

Have a talk to Mike Vine in Brisbane. He does a turbo setup for the 4BD1 that doesn't require intercooling. The turbo (garret T3) is mounted on the drivers side under the inlet manifold and in reverse to the normal turbo position (i.e. the compressor on the forward side and turbine on the rear. This keeps intake temperatures considerably cooler that the standard setup. I have this setup on mine and my exhaust temps are lower than others that I have driven with the turbo mounted in the standard position on the exhaust manifold.

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Why do you think your setup does not require intercooling?

Have you measured intake temps compared to other setups?

Based on (simple) some calcs I did a while back, and system with greater than 3-5 psi Boost will benefit from an intercooler. Technically no turbo or SC setup "requires" intercooling, as increasing boost lowers EGTs... It is just that you will get better efficiency and performance with intercooling.

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Originally Posted by isuzurover

Based on (simple) some calcs I did a while back, and system with greater than 3-5 psi Boost will benefit from an intercooler.

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I worked out a while back that at 7psi if an intercooler had 1psi flow restriction then it would give no gain in air density over 7psi with no intercooler.

I consider below 10psi an intercooler is never needed (diesel), at 12psi it's worth thinking about, at 15psi you really should have one.
Only idiots run higher than 20psi without them.:angel:

Petrols are different, they have the whole pre-ignition thing to control and can't run the intake temps a diesel can.