Pics of intercooler set up in 1HDT?, Auto tranny strength? Tuning advice?

[ElectricDyck]

Hey all! Like to take this time to thank everyone for the wealth of info found here, it has helped me greatly.
My brother in law has a Nissan Skyline that he's constantly tuning. He keeps asking me to tune my 1HDT, I told him I wouldnt mind a few extra HP, but don't want to affect engine life. He suggested I install a boost gage and a grainger valve, possibly an intercooler and 3" exhaust. So......I started searching MUd.

I found tons of info on other engines, but very little on this one. What I found was to 1) Get a pyro, boost and trans temp gage installed. This I will do. I found talk of the auto box not being able to handle the extra ponys. I found talk of people over fueling (how do you do this), installing intercoolers (no pics of how plumbing was done), and upping boost. I t seemed there was no real agreement as to an ideal set up.

My father strongly believes in leaving everthing stock and reliable, I beleive this to a point, but also believe you can tweak certain things and still have reliability. I'm just looking for more info and real life experience from people who have done some mods and tuning. Maybe some links to some AUS sites have more info.

Electric

 

[haffi]

intercooler with pics

Hi, I have a 1990 hdj81 with 1-hdt and intercooler. Saw your post and went out with my camera


Right now the Intercooler is not connected to the engine, last fall I installed a York compressor. The intercooler pipes were in the way so I removed them. But now I´m thinking about finishing.

The intercooler itself is huge, made by some company here in Iceland. The air in and outlets are on each side under the batteries. The pipes can be seen if I remove the turn signals.

I had to remove all the piping to make space for the york, this is the way I´m plannig to make new upper pipes.
The lower pipes must be routed somehow under the York, most likely through inner fender just next to the alternator.
The piping is hopefully going to be my friends problem he is better on the welding machine then I am.

I know it is rather messy and dirty under the hood, this is just what you get when driving on Icelandic, wet gravel roads
and forgetting to install the oil plug on the york before testing it...the oil was all over the engine and more.....

 

[ElectricDyck]

Nice york install! Doesn't even look like you had to make a bracket, did the stock ac bracket bolt up?Defintely fits perfectly if you lose the ac. I guess you don't need it in Iceland LOL. I like the triple batteries too, also fits well. I like your idea for running the piping,seems fairly easy. I was thinking that it would be cool if there was an inline filter that could be used to eliminate the need for the air box?
Looks good, let me know hw it turns out.

 

[haffi]

Thanks. Yes I´m using a original ac bracket, just made a plate between it and the york. There was no ac in my car origanlly, the ac would be nice for two or three days in the summer. But totally worthless rest of the year

I hope I will be in the right mood sometime the new few weeks to finish the intercooler. I will post pics.

The third battery is the best mod in the world. I´m using it for all aux stuff (radio, amplifier, VHF radio, mobile phone, interior lights, 12v. cooler). This way I can party all night long and still have power to start the morning after

Have you found a intercooler you like?

 

[Tapage]

I have a buddy in the same way you are .. but after some conversations about it we decide top mounted our best bet .. coz here in Panamá AC it's a must !

Less plumbing and course turbo lag to handle with that.

Anycase you can turn up a little bit your boost up to 12 PSI without intercooler and a extra cooler for your engine ..

Get a pyro, boost and tranny gauges as your plan .. and after that let us know ...

 

[Adam B]

I was about to ask the same question....

I will not spend $2500 on the Safari kit, although bolt-in would be so nice and easy.

I was thinking about getting an IC from a Supra 7M-GTE since they also use a CT26 turbo. I'd make the ducting out of mandrel-bent exhaust tube cut 'n' welded as necessary.

Any thoughts on duct diameter? Just match the factory size?

The only part I'm not looking forward to is cutting the intake "Turbo" pipe. I have access to a TIG but haven't practiced yet. At least it's thick material...

 

[Tapage]

Any thoughts on duct diameter? Just match the factory size?

I would keep on 2"

 

[Adam B]

Does anyone actually have the Safari IC kit? I'm interested in what size piping it uses. The pictures make it look fairly small, like 2", but it's hard to know for sure.

I found a Supra 7M-GTE IC that I'm going to use. Front Mount, inlet and outlet on the same side, the guy I'm going to pick it up from says the in/out are either 2" or 2.25"

haffi: When you installed yours before you added the York, did you make it work without modifying the aluminum intake "Turbo" pipe? It looks so close to the turbo outlet that I don't see how it could be done without some modification to the intake pipe.

 

[crushers]

top mount which will work on the HDT:
https://forum.ih8mud.com/showpost.php?p=2021137&postcount=8

 

[crushers]

front mount

 

[crushers]

more:

 

[Tapage]

Impresive job .. I like the intake joint.

So how much turbo lag you thought have on this setup with front intercooler ?

 

[Entaran]

Lag isn't something you'll get with a small turbo on a 4.2 diesel.

You boys need to spend some serious time on some proper performance forums

Intake piping should be 3inches flared down to the turbine inlet size (generally 2 or 1 3/4 inches on small turbos like TD05 and CT26), off the compressor outlet, you should flare to a maximum of 2 inches before you get to the "hot" side of the intercooler. From the "cold" side of the intercooler you can either keep it 2inch or flare to 2.25 or 2.5 inches to the manifold inlet.

Lag is very very rarely modified much by pipework routing or lengths. You get something like 1/10th of a second slower spool on the turbine housing per foot of pipework extra. So really, it's not very noticeable.

 

[crushers]

Lag is very very rarely modified much by pipework routing or lengths. You get something like 1/10th of a second slower spool on the turbine housing per foot of pipework extra. So really, it's not very noticeable.

ummm, so 9 ft of piping PLUS the intercooler and you have a full second of lag...
hummm, that sounds like quite a git to me...

 

[jcolvin]

ummm, so 9 ft of piping PLUS the intercooler and you have a full second of lag...
hummm, that sounds like quite a git to me...

There's definitely some lag on my IHDT with a japanese intercooler. Turbo spool-up + torque converter lag = it thinks about things for a while after you press the go pedal.

 

[Entaran]

If you have 9 ft of pipework on your car you need to think about the routing a little better.

I think the average is about 5ft or less. Especially with topmounts.

 

[crushers]

dude,
take a look at the pics posted, the front mount intercooler needs to go up fromt he turbo, to the rad, down the side, under the frame to the intercooler then back under the frame, up beside the rad, back to the motor and to the plenium. and add the distanve it is taveling though the intercooler...
add it up.
what, you think that is 2 feet of piping?
sheesh.

even the top mounted intercooler adds 2.5 ft of plumbing and you can't get it any cleaner/shorter than that.

open your eyes and shut the mouth.

 

[ElectricDyck]

Hi Wayne, thanks for the pics. Do you have any info on the results they're getting from either set up. Any more pics of the intake on the front mount?
I like the top mount, but my brother in law has told me that a lot of the time they become heat soacked and you lose a lot of the benifit of having an intercooler. Was there any sort of hood modification to channel the air to the intercooler. What sort of boost pressure were they running.
Sorry about all the questions, I'm very curious.

 

[Entaran]

Crushers, that's ENTIRELY dependant on your intercooler selection as to the length of pipework. I believe mine is about 6 foot long MAX.

If you've got too much lag, swap to a smaller turbine wheel.

My intercooler is mounted vertically on the RHS of the grille (looking from in the car to the front), the pipework comes in from the bottom and exits the top and goes around the radiator on the same side.

 

[Tapage]

I like the top mount, but my brother in law has told me that a lot of the time they become heat soacked and you lose a lot of the benifit of having an intercooler.

I thought if you are triying to get performance for a top mounted intercooler at low speeds, theire are some electric fans that you can place under it ( intercooler ) as pullers as you see in new ZD 3.0 nissan engines .. or 4M40 Mitsu engines ..