Outer Limits 4x4 Board

Hi there
Got myself a terrano d21 with a td27t in it.
SO far I have turned up the boost and fitted a intercooler.
Its off the road at the moment as I am putting a t25 turbo on it as the old turbo was not making the boost I was after.
Im looking to run about 20-25 psi into it.
I see they change the intake manifolds alot on the td42 and since this is basically the same engine as that with two cylinders missing do you think its worth while doing ??

wax wrote:Hi there
Got myself a terrano d21 with a td27t in it.
SO far I have turned up the boost and fitted a intercooler.
Its off the road at the moment as I am putting a t25 turbo on it as the old turbo was not making the boost I was after.
Im looking to run about 20-25 psi into it.
I see they change the intake manifolds alot on the td42 and since this is basically the same engine as that with two cylinders missing do you think its worth while doing ??

Is it the model that has EGR fitted, if so rip that junk off, remove the manifold and either hightop it or if using front mount then make appropriate changes to let it breathe mate.

They can be made to go well.

MAtt

yes it has the egr on it. I will be welding that up for sure. thanks for the reply
i see alot of people doing td42 but not many people doing td27 engines

I had one for a while, I didnt go as far as you but I did run into trouble with the relief valve lifting on the manifold. Bin that too.
I was running 11-12 psi non intercooled.
Big cooler on the auto trans is the go as well, and you will find the radiator is not big enough. Make sure your fan hub and shroud is in good nick.
There is a flap of rubber on top of the radiator support panel which is very important, it pokes forward and touches the bonnet and stops air from spilling over the top. I extended mine a bit with gaffa tape which helped a lot.
small or no lights in front, I cant stress enough the cooling system barely copes. They actually fitted an auxiliary radiator on some of them under the passengers floor.
Great little car, it used to use 8.5 per 100 round town.
Whatever you do I would not put a front mount on it, the radiator is pathetic... Go a top mount and shroud and seal it very carefully.

there is a little butterfly in the intake on some too, once I got mine working right it didnt cause too many problems but you might wish to remove it.
If you need any clearances, tolerances, torques etc let me know, I have the Nissan service manual for the engine.

There is a thread on patrol4x4 about a different thermostat in the TD42 which closes off the bypass as the main one opens, I would definitely do this mod to yours.

Thanks for that, much appreciated.
I have blocked off the relief valve off already. I disconnected the waste gate on the stock turbo and it went to 16 psi. But its just making heat I think.
I have no lights on it, but i was thinking about good info there. Cheers on the gaffa idea I will look into it. I was going to use water wetter as it seem to make a big difference to the drift cars. I was also thinking about an oil cooler as well. The butterfly mod is done. well i just took the butterfly out so it guess that what you were talking about.
I will look for that thread about the td42 thermostat

Since youve changed the amount of boost, have you done anything about more fuel?

By the way you describe it, if you dont have a good egt gauge yet, it might be worth your while getting one.

Yes I have turned up the fuel. I have an oil temp , water temp. egt and a boost gauge.
Its getting a bit hot in the top end at the moment but I am fitting a larger turbo to flow more air to bring the afr closer to the right ratio.
Thanks Guys for all your suggestions so far, Im new to this and all of them are good

the best change I did to mine was the 2.5 inch mandrel bent exhaust.
Don't disconnect the wastegate, all you will do is overspeed the turbo and make heat.
If you have somewhere to put it an oil cooler is an excellent idea, there should be heaps of room for a sandwich plate on it.
Also the standard air filter housing is pathetic, a bigger filter box would be a very good thing, A VN commodore one would be a good option but forget about dual batteries with it.

the standard air intake from inside the guard is a big choking point. at the smallest point... well... how do I put this...A well used vagina is larger. You'd be lucky to fit three fingers in it.
I ran a duct from the filter to above the passengers headlight and cut that section of the grille out.

Thats good information thanks. Yeah your right on the turbo over speeding I think thats helping my egts climb. Good to know about the exhaust as it goes in for the new one next week on account of the bigger turbo

in front of the intercooler you can see the shroud that directs the air up. I have a fan on it now. Im not happy about the filter being there but I wasnt faced with a choice for a quick fix. It made a difference to the torque thats for sure. I plan on keeping the filter in the same place with a better filter and putting a bonnet scoop on the bonnet. I will build a box around the filter. Your bang on about the air intake I hadnt thought of a vagina when I looked at maybe more of a sphincter haha.

Here is my relief valve elminator. 25mm bsp. $3.18 cant argue with that.


Egt , water and oil gauges on the dash. I have new heater vents coming. It seems this is a common thing to melt in the aussie sun

Got a gearbox that can take more? I asked a while back if a TD42 gearbox would fit a TD27, but never found the answer.

Got that sorted. I even posted the answer in offroadexpress.
I will have pics up here soon of the answer