Intercooling a Nissan GU 4.2TD

Submitted: Thursday, Dec 19, 2002 at 01:00
ThreadID: 2666 Views:1430 Replies:4 FollowUps:4
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Has anyone I/Cd a GU and where is the darn thing going to fit with all the goodies I already have under the bonnet? (dual bats,compressor,)I think this is a good one for the Truckster to handle.
Ray.,
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Reply By: wazza - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Ray,

I have been thinking of intercooling my 80 series for a while now. A couple of intercoolers for sale on another forum and in the Melbourne trading post. This week someone if fitting new intercoolers from $600. There is a pic in the trading post as well if you look online. Much better perfomance if you can get them front mounted behind the grill in front of your radiator. Much more airflow and especially at low speed you don't get the heat build up of the under bonnet models. No need to cut the bonnet to fit the scoop either.

From what I can work out, no real need to retune once it is fitted, although a bigger exhaust (3" mandrel bent works good for the 4.2) will complement the intercooler. Where were you thinking of getting the cooler from? 4.2 needs a bigger one than the 2.8/3.0 or even WRX type. I think ARB should be able to fit the Safari for about $2000 if you push them and that includes dyno.

So, keeping to the topic question, behind the grill is best. Piping, if you are doing it yourself is cheapest done going to an exhaust place and getting them to bend up most of your pipes (again try to get mandrel bends as the are less restrictive on flow). Use radiator type hose for the joins. A truck spares place should have every size and bend that you need to get around the fiddly places.

The only reason I haven't done it yet, I am paying off the diff locks and think at the money for me will be better spent on getting the injectors looked at. It is a bit of a slow poke at the moment. I will be interested to see how you go.

Hope this helps

Wazza.

AnswerID: 9993

Reply By: dave - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
I've been considering an I/C for a while. But on wazza's reply, I need to replace a piece of connecting hose from the turbo to the inlet manifold. Radiator hose will not do the job because of the heat involved. I've been told that it needs a silicon hose. I imagine that the same would be needed for an I/C.
The hose on mine is about an inch too short and has the annoying habit of randomly coming off, under full whistle

Dave
AnswerID: 9995

Follow Up By: Wazza - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Dave,

Yep, Oops. Silicon I/C hose available from a lot of Turbo warehouses in the States for a decent price compared to here. Just need to know sizes/shapes. Google brings up heaps of places.
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FollowupID: 5220

Reply By: Truckster - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
If the GU things are the same way around as the GQ, then your set.
Give Andrew of

D & F Racing Products
Fcty 13/ 27 Aster Ave
Carrum Downs
(03) 9775 0558

He makes one that is top mount, same as mounting 3.0 GU, you install a GU Bonnet Scoop $90 for the scoop + installation, and your nearly there...

Its similar to the DTS unit, you can get EVERYTHING else you need from DTS for $250, thats what they have quoted me, then the IC from Andrew, which is LOTS less cost and lots better and more volume thus is lots more efficent than the DTS unit...

DTS will do one without KY or Vasaline, around ~$2500 for IC kit.. OUCH! I can tell you AW's one will be well under $1500... he builds them usually for drag cars, street Ginos, etc, for around $1000... So this one should be the same.

if you would like some pics of AW's work, gimme a yell..
AnswerID: 9996

Follow Up By: Truckster - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Andrew is also now on this list...

awill4x4

so maybe he can answer, he doesnt get online much...
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FollowupID: 5222

Reply By: Tony - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Ray, I have the Safari I/C on my GU 4.2 and it works a treat.

I found the best way of doing things was get it all from the one place, so when Murphys Law comes into play one has a lot better chance of it all fitting together. Its a neat package, fits behind the grill, come with all the plumbing required.

As far as cost involved, if you want it bad enough go and get it.

Tony.
AnswerID: 10004

Follow Up By: Will - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Tony,
The Safari IC kit also increases the boost, the kit has a T piece called bleed off valve on the wastegate, this increases the boost to max.

The power gain of that kit therefore does not only come from the intercooler but also from the boost increase.

Will
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FollowupID: 5224

Follow Up By: Truckster - Friday, Dec 20, 2002 at 01:00

Friday, Dec 20, 2002 at 01:00
Then you have the discussion of behind the grill problems or over the engine heat soak probs

Im going for the over the motor one (same as the nEw GU 4.2 Intercooler) same as the 3.0..

Andrews one is also bigger volume than the Safari. Talking to them recently they werent really interested in helping at all, since I dont have a Safari turbo, I have the Denco System which gives more bottom end than safari

For what I do more of, infront causes more heat to the engine, and fills with crap faster than over the donk.

Over the donk you get heat soak in slow going, so a good cooling system is mandatory....

Its a hand off one for the other.

As for getting it all from one place, CGAF personally.. If I can save $1000 and get the same thing but had to get it from 20 places, I would.


As for more boost, how much boost do you want..?? To go much more you need fuel adnoid(I think its called something like that).. It allows mroe fuel at certain situations...

Mark of ARB Sth is running 20psi on his GQ with the Denco system, but that thing is nuts! 80,000+klms so far no probs..
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FollowupID: 5226

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