Cheapest specifically designed intercooler for 80 series. (1 Viewer)

[alia176]

Mot

Thanks for posting the pics. It's interesting that the air flow toward (closer) the windscreen is very little. This tells me that there's a huge negative pressure (or vacuum) in this area. Couldn't one use the negative pressure to extract the air OUT of the hood scoop if it was placed in reverse? What I mean is, instead of forcing air through the scoop, why not extract air out of the scoop? Since there is a huge positive air pressure in front of the vehicle and some under the front of the bumper and radiator, why not help the air go through the intercooler and out of the hood?

Just a thought!

 

[syche]

It is not the external air-flow which will make a scoop work, it is the pressure difference between the engine bay and the scoop intake which makes it work.

You will need a huge low pressure under the hood to make a scoop work properly if you are in a very low, or negative pressure area over the hood, and that is the case when you put the scoop too much backward.

Just tape some wool stipes on your hood, you will see imediately where to place the scoop for a good efficiency

 

[mudstorm]

im running the 4wd bitz intercooler
would go air to air again just cause of the fail safe simplicity
but the 4wd bitz intercooler lacks surface aria

went this intercooler just cause of the minimal pipe work to minimize lag
but now that im chasing hp will probably change to a bigger turbo and run front mount

did make a big difference but ..have had a taste of power and i want more

 

[syche]

Hi Mudstorm,

I think you might have a problem with your IP. A HD-FT well tuned without IC is already nasty on power, add the IC and 15psi, you should have more than enough.

I saw you have 4.1 gear ratio, is it an automatic transmission, the factory one on manual was ..3.7 if i recall well, that should also help on the kick in the ass part

 

[Dougal]

You will need a huge low pressure under the hood to make a scoop work properly if you are in a very low, or negative pressure area over the hood, and that is the case when you put the scoop too much backward.

Just tape some wool stipes on your hood, you will see imediately where to place the scoop for a good efficiency

Wool strips will tell you only about wind, not pressure. It is pressure that will drive air through the scoop, not wind.

The top of the bonnet (hood) is a high pressure area, the engine bay is a low pressure area because it's open underneath. The areas which the wool blows around on top of your bonnet does not show if that is a good spot for a scoop. You can have areas of high pressure where there is very little turbulence to blow the wool around, these places are better to locate a scoop, but your wool won't show that.

 

[syche]

The top of a flat horizontal hood have never been a high pressure area to my knowlege.

If you look at the front of the hood, it is like the leading edge of a plane wing, and a plane fly because the all top of the wing as a low pressure area, while the low part of the wing has 0.

At some certain speed my wool stripes in the 3/4 rear of the hood where pointing slightly up, showing this low pressure area.

Just try it, it take 5mn and a short run to see what is going on

 

[Dougal]

The top of a flat horizontal hood have never been a high pressure area to my knowlege.

If you look at the front of the hood, it is like the leading edge of a plane wing, and a plane fly because the all top of the wing as a low pressure area, while the low part of the wing has 0.

At some certain speed my wool stripes in the 3/4 rear of the hood where pointing slightly up, showing this low pressure area.

Just try it, it take 5mn and a short run to see what is going on

It's not flat, it's not horizontal and it has a big windscreen at the back edge.
In fact it provides enough positive pressure that toyota (like every other car maker) decided it was a great place to put the cabin air intakes.

Wool stripes cannot and do not show pressure. They are a complete waste of time.

 

[Tapage]

did make a big difference but ..have had a taste of power and i want more

me definately like it .. and IMOP my way to go ..

 

[mudstorm]

just to give you guys a idea of whats happening with my top mount and power

im running approx 14-15psi(manual boost controller), hi flowed injection pump (a1 diesel injection), top mount intercooler from 4wd bitz , 3'' mandrel bent exhaust from Scots rods, and a rough tune (i bent my diff before i got a full day on the dyno ... ) i am making 148kw at all 4's egt's are on the hi side but the inter cooler and scoop did bring them down about 80 deg F

my aim 200 wheel kw

using diesel gas
snorkel(the smallest gain recorded for a 1hd-ft on the dyno when adding a snorkel was 7kw)
and more fuel
larger turbo as the ct26 only has 43mm inlet and i believe is killing off boost performance

 

[Dougal]

just to give you guys a idea of whats happening with my top mount and power

im running approx 14-15psi(manual boost controller), hi flowed injection pump (a1 diesel injection), top mount intercooler from 4wd bitz , 3'' mandrel bent exhaust from Scots rods, and a rough tune (i bent my diff before i got a full day on the dyno ... ) i am making 148kw at all 4's egt's are on the hi side but the inter cooler and scoop did bring them down about 80 deg F

my aim 200 wheel kw

using diesel gas
snorkel(the smallest gain recorded for a 1hd-ft on the dyno when adding a snorkel was 7kw)
and more fuel
larger turbo as the ct26 only has 43mm inlet and i believe is killing off boost performance

You need more boost then. An intercooler isn't a magical device, it can only cool the boost you have. More boost will bring the EGT's down and you'll need a lot more boost still if you want 200 wkw.

Gas fumigation will simply compete with your diesel for the available air, snorkels will probably be a restriction at those power levels and yes the stock CT26 will be stretched.

 

[Tapage]

larger turbo as the ct26 only has 43mm inlet and i believe is killing off boost performance

jump into GT2860R or something like .. If you wanna run big boost and lower your intake temps ..

 

[mudstorm]

i cant see the snorkel being a restriction
sucking cold air from outside the cab with ram flow effect,
when safari installed there snorkels on s 80 series 1hd-ft cruiser they gained 7kw on the dyno with no air speed

 

[Tapage]

i cant see the snorkel being a restriction
sucking cold air from outside the cab with ram flow effect,
when safari installed there snorkels on s 80 series 1hd-ft cruiser they gained 7kw on the dyno with no air speed

I don't think it's a restriction .. but never believe in a power gain due to it .. neither ..

 

[Dougal]

i cant see the snorkel being a restriction
sucking cold air from outside the cab with ram flow effect,
when safari installed there snorkels on s 80 series 1hd-ft cruiser they gained 7kw on the dyno with no air speed

You can't see 2m of convoluted plastic pipe being a restriction?

Ram air at legal road speeds doesn't provide enough pressure to do anything. When you can do 300km/h then it's worth it.

 

[syche]

It's not flat, it's not horizontal and it has a big windscreen at the back edge.
In fact it provides enough positive pressure that toyota (like every other car maker) decided it was a great place to put the cabin air intakes.

Wool stripes cannot and do not show pressure. They are a complete waste of time.

I can only agree on on thing, yes you have high pressure in front of the windscreen, but it is not going far enough to creat over pressure 5 to 70cm back in the front, so, no high pressure where the scoop actually is.

The toy or other brend vent inlet are right in front of the windscreen for that reason

 

[Dougal]

I can only agree on on thing, yes you have high pressure in front of the windscreen, but it is not going far enough to creat over pressure 5 to 70cm back in the front, so, no high pressure where the scoop actually is.

The toy or other brend vent inlet are right in front of the windscreen for that reason

There is high pressure across the whole front of the car, including the bonnet.
Combined with the low pressure under the bonnet (hood) it makes for very good scoop placement.

Which is why toyota, isuzu, subaru, nissan, mazda, mitsubishi etc have all produced vehicles with intercooler scoops through the bonnets.

Or were they all wasting their time?

 

[syche]

yes you are right, just look at their hood angle, position of the scoop, it has never been all the way back to the windscreen, it is in the middle of the hood, if not more forward

And subaru has seriously redesign it's hood scoop for STi version...to go and catch better air flow a little more higher over the hood.

For the issuzu trooper i would not take it as an exemple, just look at the way the scoop is made, you will find out..

The new hilux is a perfect exemple of a scoop that must be efficient.


I was just wandering why...the Paris dakar cytroen and 405 and 205 t16 has a big air outlet right ont he hood, to extrack air from the engine bay or cooler area.
Same on the lancer Evo, if it was low pressure against high pressure, it won't work.

Have alook at ARE cooling, their website is very clear

 

[Dougal]

yes you are right, just look at their hood angle, position of the scoop, it has never been all the way back to the windscreen, it is in the middle of the hood, if not more forward

And subaru has seriously redesign it's hood scoop for STi version...to go and catch better air flow a little more higher over the hood.

For the issuzu trooper i would not take it as an exemple, just look at the way the scoop is made, you will find out..

The new hilux is a perfect exemple of a scoop that must be efficient.


I was just wandering why...the Paris dakar cytroen and 405 and 205 t16 has a big air outlet right ont he hood, to extrack air from the engine bay or cooler area.
Same on the lancer Evo, if it was low pressure against high pressure, it won't work.

Have alook at ARE cooling, their website is very clear

Let's see.
Subaru style their STi scoops to look more aggressive because that's what the owners want.
The Isuzu trooper scoop is bad why? Because it only exits through one side underneath?

Why must the hilux scoop be so efficient?

Here's an ARE scoop on a landcruiser, exactly where you think they are no good.

 

[Tapage]

Here's an ARE scoop on a landcruiser, exactly where you think they are no good.

I'm looking for a Trooper 3.1 diesel hood scoop to my lovely Marilu ..

 

[Cañonero]

Wow!

Lots of new info here!.

I finally have my 4wdbits intercooler for the 1HD-T (and my 3" exhaust also, but that's another history).

I was definetly going to get the Cross Country 4x4 one, but I got tired of waiting for them and a friend got a very good deal to bring some 4wdbits ones, so I got the 4wdbits.

My main concern is the elbow and the rear position of the 1HD-T version. I'm veeery interested on the discusion going on here about the right location for the scoop. (I know I can not choose the location, but if the scoop won't be a good improvement in this intercooler's particular case, I might try some other alternatives).


In the spanish forums there are several opinions about how to do with this intercooler:

1) Just install it and leave without scoop. Warren says there is an improvement just by installing it, I wonder how much. Mudstorm, have you measured the EGT drop with intercooler but without scoop?

2) Install it, make no scoop, but raise the rear of the bonnet and remove the rubber gasket in the rear. There is a guy in the forum that bought one of these and is also a mechanic I trust that is convinced that this would improve under bonnet airflow greatly and would be as effective as a scoop. I can't see it being so effective, but as I said, this is a very knowledge guy. He also told me that this would be effective even at low speeds thanks to the engine fan that would move enough air to cool the intercooler as well.

3) Install intercooler with no scoop but with a fan, to force underbonnet airflow to circulate through the fins of the intercooler.

4) Install intercooler and scoop.

5) Install intercooler, scoop and fan.

6) Make an underbonnet air circuit to drive the ram air from the front to the intercooler, just like the Toyota Land Cruiser 120's or the Peugeot I post pictures of previously in this thread. This would be a complicated option, but might be very effective.


What do you guys think of these options? Any that you think is a particulary good idea?


Tapage, when you said you like it and it's your way to go, do you mean the 4wdbits one or the cross country one?