Isuzu intercooler

[DRanged]

Hey guys

Thought I would stick this in here first before the market section.

Top mount intercooler with bracket to bolt to intake manifold and bonnet scoop $120 + freight. No hoses as they were reused to suit another project.

All as per photo. ( was in a RRC)

https://www.aulro.com/afvb/images/imported/2008/03/315.jpg

Regards Justin

[EchiDna]

one would need a bonnet scoop to make it worthwhile correct?

so what are you changing to? front mount? water to air?

[DRanged]

one would need a bonnet scoop to make it worthwhile correct?

so what are you changing to? front mount? water to air?

It comes with a scoop Similar to GU nissan type.

Changing to a bigger top mount to help with pushing the 35"' tyres etc.

Justin

[def-90]

hey justin mate where did you get those front turretts from? did you make them?


ooopps, i still owe you a stick of knead-it.

[DRanged]

hey justin mate where did you get those front turretts from? did you make them?


ooopps, i still owe you a stick of knead-it.

Yep made them a few years ago. Just standard height got the tube bent up at a local tube benders and machined up the bottom plate. Welded them up and powder coated them.

Justin

Why dont you come down to Emu Creek for a hard run in April with us. I,ll even let you buy me a tube of ''Knead It''

Justin

[Larns]

Justin

I've hear from the boys at KLR that an intercooler did F*#@ all on the 4BD1-T, They did mention that they tried it on the non waste gated turbo version, but alas this is what I have.

Your opinion?

:twobeers:

[andrew e]

My water to air IC knocks between 25 and 35 degrees off the intake temps.

[DRanged]

Justin

I've hear from the boys at KLR that an intercooler did F*#@ all on the 4BD1-T, They did mention that they tried it on the non waste gated turbo version, but alas this is what I have.

Your opinion?

:twobeers:

Any engine will perform better if you can reduce the intake temp of the air. I know the KLR boys very well and their Isuzu rangies are intercooled:cool:. Funny that.

Justin

[Dougal]

Justin

I've hear from the boys at KLR that an intercooler did F*#@ all on the 4BD1-T, They did mention that they tried it on the non waste gated turbo version, but alas this is what I have.

Your opinion?

:twobeers:

Isuzu even intercooled the 4BD2 themselves.
If you're running under 10psi boost then it's a take it or leave it thing. But who runs less than 10psi boost?

[Larns]

The factory turbo has two models, mines the model without the wastegate. Havn't tested mine personaly but a mate that has the same set up had it run up on the dyno, and boost peaked at around 8 psi.
I wouldn't mind more but don't want to sacrifice reliability.

:twobeers:

[justinc]

I've intercooled mine, BIG frontmount. I have no before and after figures, but after a long hard climb, I can barely touch the turbo outlet pipe into the IC, and the outlet to the manifold is cool to the touch. I would say it is doing its job. I'm running 15psi at the manifold.
After I replace the trans, I'll try and do a dyno run for interests sake.
And yes, anything less than 10Psi it is debateable as to whether it is worthwhile.

JC

[Dougal]

After I replace the trans, I'll try and do a dyno run for interests sake.

What're you doing to the trans and how do you dyno them (2wheel, 4 wheel etc)?

[Dougal]

The factory turbo has two models, mines the model without the wastegate. Havn't tested mine personaly but a mate that has the same set up had it run up on the dyno, and boost peaked at around 8 psi.
I wouldn't mind more but don't want to sacrifice reliability.

:twobeers:

There are at least 3 turbos.

IHI RHB6. Wastegated, top mount
Garrett T25 wastegated.
Garrett T25 free floating with T3 mounting flange.

[justinc]

Hi Dougal,

I am on my 4th set of transfer case thrust washers, after about 30,000km!(LT95):(

I have recently bought an Ex Mil 6X6 LT95, with taper roller TF case etc, and this is going in shortly.

Local TAFE has a 4 wheel dyno, I'm offering the truck for a night course dyno run if they are interested...:twisted::twisted:

JC

[Dougal]

Local TAFE has a 4 wheel dyno, I'm offering the truck for a night course dyno run if they are interested...:twisted::twisted:

JC

You're a genius.:D

We have to get you onto an Isuzu MSA box too.

[def-90]

hey justin emu sounds good haven't been there for years! i've been meaning to get to the coast and join, but last year just dissappeared!

i'm keen though, i'll have a look at the GCLROC and see when, and when next meeting,

cheers mate

sam

[Vern]

Justin, old thread i know, but any pics of your new top mount intercooler????? Interested to see what you've done, i can't fit a front mount and don't want a water to air

[DRanged]

Vern
not a real good photo mate but it is 450 x 450 x 75 and does a good job although mounting it to the motor is not a good idea. Body mount is better.43051

Justin

[Vern]

Is that core size or overall? I have one here thats 450x300x75 core size, but boy it takes up a lot of room. Hoping to find something factory for ease of parts

[Dougal]

A lot of japanese vans (incl prados and 200 cruisers) run a top-mount which is fed air by ducts under the bonnet which lead towards the grille. Could be worth a look at.

[DRanged]

Is that core size or overall? I have one here thats 450x300x75 core size, but boy it takes up a lot of room. Hoping to find something factory for ease of parts

Overall mate and yes they take up a heap of room.

Justin

[landrover dave]

A top mount intercooler will not work as efficiantly as a front monted cooler. 1st there is little area on top of the motor to fit the intercooler and where is the air going to go to? Straight into a hot motor! 2ndly a bonnet scoop is not very efficient as the hole in the front is usually in a low air pressure area. Look at the reversed scoops HDT put on Toranas and Commoders, The base of the windscreen is a high air pressure area and the reversed scoops got more air to the carby than a front facing scoop! The most common mod Toyota and Nissan owners do to their top mount intercoolers is fit a thermofan that runs the whole time the engine runs!

A lot of japanese vans (incl prados and 200 cruisers) run a top-mount which is fed air by ducts under the bonnet which lead towards the grille. Could be worth a look at.

[DRanged]

A top mount intercooler will not work as efficiantly as a front monted cooler.[
Yep we sort of worked this one out mate;)

If you read our posts we run AC and high mount winches, which leaves us a top mount as our only choice. I also run vents in the sides of the bonnet to help reduce and positive pressure that is under it.

Justin

[Vern]

pretty sure a top mount will run more efficiantly than no intercooler;). All modern deisels seem to be running top mounts these days. I'm looking to put mine on the drivers side of the engine with a 10" thermo fan under it for low speed work. Will keep investimagating it:)
Could hook the thermo up to a relay for when the EGT's start getting high

[Dougal]

Could hook the thermo up to a relay for when the EGT's start getting high

A boost switch would be the easiest way. I wonder if a radiator thermo-fan switch would work as a boost temperature switch? A 90C cut-in temp from the turbo could work nicely.

[Vern]

Still thinking this is the way to go for me (top mount I/c). Any chance you have a better pic dranged?

[flagg]

If you read our posts we run AC and high mount winches, which leaves us a top mount as our only choice. I also run vents in the sides of the bonnet to help reduce and positive pressure that is under it.

Justin

FWIW This is why I went WTA. bit more expensive and complicated but it is an option.