Maximum boost on a 1kz-te.

[mikee]

Hi what is the maximum boost these motors can handle safely.I see in some post 20 psi and 1 post saying 27psi.When to they become unstable,cheers Mike.

[Cass]

iv read that the factory efi setup will limit it to 14psi, can only get it higher with a mechanical fuel pump, 20psi would be safe, i wouldnt wana go much higher though

[kbushnz]

I was told by one guys who does the mechanical pumps..
The factory turbo is only good to 18 - 20 psi.
As its inefficient past that and just gets too hot.

As stated there is a fuel cut at 14 to 15 PSI.....with factory ECU...

Calvin

[crazyclark31]

yep if you got over 18psi you'll only pushing hot air(read over 100degc) thru motor. Even with a really good intercooler it will too high.

However if you chuck a tdo5 or t25-t28 on it then with a mechanical pump you could run 25psi. as with any turbo you'd want a good intercooler fitted.
Considering these motors blow heads in standard guise regularly i'd be pretty wary winding it up to high.

[mikee]

Great I will go to 18 and see how it goes,its currently at 15 and is a huge improvement over standard.thanks for the replys,Mike.

[Heath]

Std is around 11 psi (varies due to level of deterioration in the spring tension I guess). When I get a Boost controller I intend running at a steady 12psi. Not much I know but at least it is a true 12 psi and not fluctuating due to valve creep.

Just been surfing the Turbo smart site and see they make a BOV for diesels with TPS and thought maybe that would be a cool toy for later on (when I win Lotto ), but they talk about some over fueling because the air/fuel mix is changed as the air charge is dumped and if the fuel is continuing to flow thenheat would spike in the chamber (not good).

Have to do more homework, would be good to know in the 1kz-te if when the throttle is released completely does it stop fuel to the injectors so only air is running through the engine.

Not sure if it would be of real value but maybe the sound would freak a few "car enthusiasts" and bring a smile to the dial.

[tweake]

with such low boost i wouldn't bother with an expensive setup.
a few on the surf forum have fitted bov's. fit lighter springs in the bov and use system vacuum to trigger the bov instead of throttle vacuum. use idle and clutch switches to trigger the vacuum.
apparently it works well especially for those engines that have throttle butterflies like the 1kz and 2lte.

[DDAN]

Hey Ive been running 20 pound of boost at the inlet manifold prob 23 pound at the turbo for over 60,000 km in my 1KZTE, but I do have a 1 GPH (63ml/min) nozzle spraying water at the turbo at over 10 pound, which for so little water keeps the turbo cold to the touch.

I was talking to a guy from Thailand, and he as a 2wd hilux with a 1KD and he is getting in a standard engine wait for it yes 800 nm. On track days he is running 60 pound and on slicks doin a 10.9 1/4 mile and on the street 40 pound,and this is a daily driven truck, If you look on youtube you will see what I mean

[mikee]

Hi Dan it seems the turbo is the weak link in the system.I cant really drive mine much on the road till its legal going for a cert next week so getting to the end of the process but when its all legal I will be able to tune a lot more,I am keen to try the water injection but will do the intercooler first,thanks for all the advice guys it helps out a lot,Mike.

[DDAN]

Hey mike Ive done the hole front Mount Intercooler on my truck, If I new about the water injection, I wouldn't of done the front mount as the water injection out cools the intercooler 3 to 1, plus it steam cleans the inside of your engine as added bonus

[crazyclark31]

Hey mike Ive done the hole front Mount Intercooler on my truck, If I new about the water injection, I wouldn't of done the front mount as the water injection out cools the intercooler 3 to 1, plus it steam cleans the inside of your engine as added bonus

what kind kinda turbo you running? and what other mods you got to go with the water injection?

[DDAN]

Hey Im just running the CT12b turbo maken great torque at the mo, but got new turbo plans in the new year, Im running the mechanical fuel pump, its just idling at the mo current tune is 148hp 345 Ft lb. with that amount of torque she is real handful in a wee truck

[mikee]

So you reckon do water injection instead of intercooler that would be easier to fit,and you used Devils Own.Is this available in NZ.Cheers Mike.

[rob-mu]

Hey Im just running the CT12b turbo maken great torque at the mo, but got new turbo plans in the new year, Im running the mechanical fuel pump, its just idling at the mo current tune is 148hp 345 Ft lb. with that amount of torque she is real handful in a wee truck

When its on all 4 wheels aye

[Cass]

Considering these motors blow heads in standard guise regularly i'd be pretty wary winding it up to high.

the overheating is caused by a useless fan hub and driving with ya foot hard up it, i refilled my fan hub, put in a boost gauge and towed a fairmont back from nelson with no problems at all, when going up a hill i just drive by the boost gauge and sit just under full boost, put it on the weigh station when i got home and all up it was a tad over 4 ton

[KIWI_TERRANO]

are you able to show us what this water injection looks like?

[crazyclark31]

Considering these motors blow heads in standard guise regularly i'd be pretty wary winding it up to high.

the overheating is caused by a useless fan hub and driving with ya foot hard up it, i refilled my fan hub, put in a boost gauge and towed a fairmont back from nelson with no problems at all, when going up a hill i just drive by the boost gauge and sit just under full boost, put it on the weigh station when i got home and all up it was a tad over 4 ton

our work van regularly tows that kind of weight.(Builders van,towing digger around) Did about 160k like that then one day bang! the head goes. That is with oil cooler and intercooler to try and stop it.
Was refering to the fact that i haven't heard of on that has done more than 200k without at least a head replacement. We have own 4 and all of them have been done.even mums that was a straight town car without a towball.

If these guys can get good reliable power outa these things then awsome.And am interested in this water spray. Am real keen to go massive hp in my td42 .And the more unconventional the better

[crazyclark31]

Hey Im just running the CT12b turbo maken great torque at the mo, but got new turbo plans in the new year, Im running the mechanical fuel pump, its just idling at the mo current tune is 148hp 345 Ft lb. with that amount of torque she is real handful in a wee truck

Didn't realise they ran the ct20b. These are a whole lot more efficent than the ct26 i was thinking of.
They aren't bad figures either. Be hard to keep traction when the torque kicks in

[LOLYF]

Was refering to the fact that i haven't heard of on that has done more than 200k without at least a head replacement.

Mines done 258k completely untouched, apart from maintenance stuff.
A lot of my mates are running 1kz's with well over 200k on original heads so they don't all give in that easy

As a side note one of my mates has built a twin charged 1kz-te using a supercharger and a turbo with a water to air intercooler. It is a sight to be seen and apparently goes pretty hard.

[mikee]

I'm not worried about the head going if it happens I will fix it but I got say I like the performance of the motor they go pretty good with a small amount of mods.

[DDAN]

Hey Im just running the CT12b turbo maken great torque at the mo, but got new turbo plans in the new year, Im running the mechanical fuel pump, its just idling at the mo current tune is 148hp 345 Ft lb. with that amount of torque she is real handful in a wee truck

When its on all 4 wheels aye

It sure does ,I didn't see your truck up their

[DDAN]

So you reckon do water injection instead of intercooler that would be easier to fit,and you used Devils Own.Is this available in NZ.Cheers Mike.

Sure thing, look it up on the web they have a forum, with all the info you need, and are real helpful, if you wont any more info hit me up and I can spend some pictures of my set up, or if you live in chch I can show you

[DDAN]

are you able to show us what this water injection looks like?

Send me a text 0272818164 if you wont to have a look

[tallsam66]

Check out this website some very interesting info on diesel engines..im sure you will all learn something from it.

http://www.bankspower.com/techarticles

[Kersh]

Certification??........

Chaps, I've now cracked two heads on my EX Prado
So I'm on a quest to avoid this happening again

I've just replaced the head again, deleted the EGR system (blanking plates both ends, and removed the butterfly). I've got a Davies Craig 8cyl trans cooler on It's way, currently in the radiator that's going in next week.

I'm thinking front mount intercooler, and/or water/meth injection... Not sure which first, maybe injection (easier)

So with these mods in mind, does any of these bits and pieces need certification here in NZ? Don't really want to cause myself Insurance woes if I roll off a cliff somewhere?

I'm looking at Devils Own injection probably, It looks pretty simple to fit. Can anyone shed any light on which wire to tap for the boost? one from the boost sensor presumably. I've only just started reading about these toys, so ANY info is good info for me.

[prado_boon]

Install an egt gauge, your obviously overheating it! I've got 290k on original head.