Tuning a 1kz-te

[gotoy]

I have a basic 1KZ-te installed in lj70, or bundy. After 1 yr of use I would like a little more power out of the engine.

The engine has non of the following mods done:

1. No intercooler
2. No add on chip
3. No boost controller

..........just bog standard, as far as I know.

So, what can I do to the engine?

The engine is running very nicely, no temperature issues.

[ferrit]

what exhaust are you running? Stock cast dump pipe?

Getting rid of the stock dump pipe off the turbo and fitting a 3" Mandrel bent all the way to the back makes a big difference- my 1kz-te in the lux comes on boost and pulls a lot harder than the 1KZ-TE in dads prado, and his is the intercooled version with another 10kw/30nm on me.

Ive heard that the controller chips make a big difference. I'll probably be going down that route eventually.

Intercoolers- im looking at getting the intercooler, Intake manifold, cross over pipes and rocker cover from a dead prado 3.0TD motor, and then buying a hilux bonnet scoop and hacking a hole into the bonnet to fit that, more for keeping boost temps down and EGT temps happier than for outright power.

[gotoy]

Hi,

Yes I am running standard, as far as I know. Dump pipe where can I get one of these or do I have to make it up?

As for intercooler I am always on the look out for a factory prado unit. Not many around and those that are on engine are usually not for sale.

What about electronic boost controller? Although I am not a big fan of these.

[ferrit]

I'd be wary of winding the boost up- toyota factory specs are around 9psi, and unless the ecu can compensate for the increased boost with an increase in fuel- because unlike the 1HZ or L series, they dont have a fuel screw, its all controlled by that $800 spill control valve, you cant manually wind up the fueling.

I took my truck into the exhaust place and said "3", from turbo to tailgate, mandrel bent, turbo muffler"

They had to get a flange machined up by Pacemaker, but that was $40, then they custom built it from the flange back.

[peeko22]

i put an intercooler on and tweaked the boost to 12 psi made a little diference defenitely noticable.

dp chip is yet to come so i can up fuel but thats 1200 bucks
also the 3 inch dumpipep direct of the back of the turbo is crapola on the 1kz so i agree with replacing that too.

[gotoy]

I have been thinking of going for a dump pipe.

Dump pipe as can be seen http://www.eng-tek.com.au/product_info. ... cts_id=221

[ferrit]

You pay $350 odd for that dump pipe. and unless you have a 3" exhaust with mandrel bends, you probably wont get much of an improvement.

I paid $1040 all up for a brand new exhaust, and $250 of that was just for the dump pipe, which was custom built for my vehicle- Those Eng-Tek ones are designed for the surfs, which have a different exhast to solid axle trucks

[gutlux44]

The eng tek dump pipe does fit the 1kz in the hilux. makes a diffence in power as well.

[ferrit]

yeah- except his 1KZ isnt in a hilux, its in a bundy.

[gotoy]

I dunno if the ENG TEK will fit or not. However I have to have a dump pipe made up. Presently. except for the rear portion, my exhaust is as came with the half cut, we just extended it, this was to save costs and do the 3" later.

So basically I would have to install a whole new 3" exhaust?

[gutlux44]

they also sell just the turbo dump flange on that ENG TEK site if your worried the dump pipe wont fit it may be worth getting the flange and making your own or getting a exhaust shop to do it

[ferrit]

i paid $40 for my flange to be machined up by pacemaker via the exhaust shop, so thats about $20 cheaper by the time you factor in postage on the engtek one.

[PGS 4WD]

How fast do you want?? We modify a stock manifold to suit a Garrett GT roller turbo, intercool and custom dump and 3" exhaust. Using a fully tuneable Rapid chip and some tricks to allow the ECU to run with the higher boost get them from 55 rwKw to 105 rwkW with no increase in EGTS. I can dig up some dyno charts if you want?

Joel

[gotoy]

LJ79 1KZ-te sump. Now in a Lj70.

[gotoy]

A surf/hilux 1kz sump won't fit in a Lj70/bundera.

[gotoy]

If I want a 3" exhaust, from what poit do I do it from the turbo?

Best to use stainless or just normal pipe?

[ferrit]

Now i'll bet the chances of me finding a LJ79 sump are SFA.

And im envious- Coils, 1KZ-TE and Lockers- Im so buying a bundy chassis and doing a coil conversion down the track!

[gotoy]

Actually I think your chances are very slim. I looked high and low as was originally going to use a surf/hilux 1kz, as it almost half price. Only way out would have been to fabricate a sump.

[ferrit]

might see if i can rustle up a part number for one off my EPC and go from there- might be able to find a part number and then get a price for one from a yota dealership.

Although by that point, its so much time and effort i might as well just weld in 40mm bumpstop extensions and put up with a reduction in wheel travel at the front.

[Yaro]

Hi!

I have a 1993 Toyota Land Cruiser LJ70 or a 'bundy' as you call them. Originally it came with 2.5td (2LT-E), but we replaced the engine with 3.0td - 1KD from TLC 120 series.

The 1KD engine is combined with mechanical pump and turbo from 1KZ-T and Intercooler from BMW X5. Added with a custom 3" exhaust (straight to rear end, no mufflers, etc.) - the end result is more than nice.

A few pics:

[ferrit]

so wait- you took a 1KD-FTV, which is common rail, pulled the common rail gear off, chucked the EFI fuel pump from a 1KZ-TE into it, removed the 1KD Variable turbo and put a standard 1KZ one on AND got it to run?

Kudos is all i can say- Considering that the ECU differences between the 1KZ and 1KD are about another 100 pins, thats a fair effort!

[gotoy]

might see if i can rustle up a part number for one off my EPC and go from there- might be able to find a part number and then get a price for one from a yota dealership.

Although by that point, its so much time and effort i might as well just weld in 40mm bumpstop extensions and put up with a reduction in wheel travel at the front.

Why do you need the Lj79 sump? Afterall you bought a surf/hilux halfcut. Except for the engine mounts its a straight bolts off, bolt on job.

Prado sumps, if I recall, are also different.

[gotoy]

so wait- you took a 1KD-FTV, which is common rail, pulled the common rail gear off, chucked the EFI fuel pump from a 1KZ-TE into it, removed the 1KD Variable turbo and put a standard 1KZ one on AND got it to run?

Kudos is all i can say- Considering that the ECU differences between the 1KZ and 1KD are about another 100 pins, thats a fair effort!

He's used the mechanical fuel pump and turbo unit from a 1KZ-T...the older non ECU version of the 1KZ-te.

To my knowledge there is no non ecu version of the 1KD. I also know its possible to put a mechanical fuel pump on a 1KZ-te.

So, yes this 1KD is possible.

Hell wow, he has 50hp more than a 1KZ.

Have to question. Whats the point to replace the electric fuel pump with a mecahancal unit? The ecu has to remain for starters.


When I was hunting for a 1KZ, I came across a few 1KD engine and auto gearbox combinations in the chop shops. For one I wanted a manual and secondly, common rail injectors are very expensive to replace..so ecomically not worth the risk on a used chop shop engine.

[Yaro]

so wait- you took a 1KD-FTV, which is common rail, pulled the common rail gear off, chucked the EFI fuel pump from a 1KZ-TE into it, removed the 1KD Variable turbo and put a standard 1KZ one on AND got it to run?

Kudos is all i can say- Considering that the ECU differences between the 1KZ and 1KD are about another 100 pins, thats a fair effort!

He's used the mechanical fuel pump and turbo unit from a 1KZ-T...the older non ECU version of the 1KZ-te.

To my knowlegde there is no non ecu version of the 1KD. I also know its possible to put a mecahnical fuel pump on a 1KZ-te.

So, yes this 1KD is possisble.

Hell wow, he has 50hp more than a 1KZ.

Gotoy is right and also you, Ferrit, for the most part. We got rid off the common rail, injectors, variable turbo and pump. Instead we put fuel pump and turbo from 1KZ-T (not 1KZ-TE) and intercooled it with a BMW cooler.

Given the 3" exhaust, changed the ring and pinion from 4.11 (standard) to Precision Gear 4.88 and put 33" Coopers Discoverer STT. Given this, the car gave 160hp at the real axle on the dyno.

For a bundy i would say this is pretty much sufficient. There are ways to get even extra power to this, but i think from mechanical standpoint the car suffer offroad ( mostly axles).

[Yaro]

...Have to question. Whats the point to replace the electric fuel pump with a mecahancal unit? The ecu has to remain for starters...

More reliability and durability in the mechanical (imho).
I am not sure how the common rail and all the electronics will handle staying in water or mud all day.

[gotoy]

Yaro, I am impressed you are not using the common rail or the electric fuel pump.

Not exactly you have done it!!!!!

160hp on 4.88. I have 130hp on 4.88.

[gotoy]

A 1KD has 170hp and a 1kz 130hp. But the torque values of the two engines are almost the same. Torque is more important than the high power.

[Yaro]

A 1KD has 170hp and a 1kz 130hp. But the torque values of the two engines are almost the same. Torque is more important than the high power.

Gotoy,
I agree with you that torgue is more important than hp. I went for the 1KD option instead of 1KZ, because here in Europe there are a lot of reports for head problems with the 1KZ-T/1KZ-TE, for engines produces prior 2001. With the 1KD me and people i know around me experienced none so far.

[ferrit]

might see if i can rustle up a part number for one off my EPC and go from there- might be able to find a part number and then get a price for one from a yota dealership.

Although by that point, its so much time and effort i might as well just weld in 40mm bumpstop extensions and put up with a reduction in wheel travel at the front.

Why do you need the Lj79 sump? Afterall you bought a surf/hilux halfcut. Except for the engine mounts its a straight bolts off, bolt on job.

Prado sumps, if I recall, are also different.

Sump and axle are currently going CRUNCH meeting each other

the IFS sump from the surf does not play nice with the solid axle of the hilux- the axle can rise too much with bumpstop compression and touches- got 2 nice big dents in the sump, and a mangled steering damper shield now!

[gotoy]

I could not sleep last night thinking about the 1KD conversion.

Ok, a mechanical fuel pump and injectors have been fitted from a 1KZ-T. The ecu, has been done away with, or bypassed. The bore and stroke of a 1KZ-T is 96x103 and so is a 1KD. So in effect the original 1KD is effectively a 1KZ-T now. Fair enough the 1KD had DOHC compared to SOHC for 1KZ-T.

So the question making my head spin is how does he have 160hp from an engine that is now effectively a 1KZ-T, which gives out 125hp?