Offroad-Express

i have been in the process of modifying my prado with 1kzte engine to get more power modifications are

water/meth injection (pre and post turbo nozzels)
front mount intercooler
2.5" exhaust from flexy back
no limit tuning power chip
hks fuel cut defender
boost controller currently running 22psi
egt guage pre turbo

after installing the no limit tuning chip apparently made for the 1kzte the truck smoked alot (to much fuel) with hight egts (i mean shot up so fast i had to take my foot strait off throttle) so it was time to crank up the boost to compensate now running 22psi and still will hit 850c easly and quickly at full throttle.
the chip has 7 settings 7th being the most fuel and 1 being less is currently set at 4 (half way) which was where the chip was set from factory. but if i am getting these results with all these mods and 22psi. how would it be possible to run the chip in the truck in factory form as it was designed to?
i guess thats what you get for a $200 chip!

Truck does have some awsome power just scared to use it for to long with the high temps.

is it possible i am running to much boost for the turbo and might actualy see lower egts with less boost?

also if any one with experience on water injection can advise if this is normal. when i have the chip turned off and boost back to standard and i turn on the water injection (30% meth mix) at full throttle i see about 50c increse in temps obviously more power but is this temprature increse normal?

appreciate any help

Go full 3inch to make it breath easy, dono much about egt but it should help with it

what turbo are you using?

still the standard turbo...... its probably far to small?

Ok...so you have a TIT (Turbine Inlet Temp Guage).
Generally high temp is caused by unburn fuel burning in the exhaust.
As you have done so many mods at once is a little hard to guess which is the biggest problem.
I think you need a custom dump pipe & also continue the 2.5 all the way to this ...this will make a difference...but not sure how much.
Not sure to what max pressure the factory turbo will work efficiently but if you over boost it will only make the air hotter & therefore less dense so wont make a positive gain....back the pressure off & see how much difference it makes.
Only adjust 1 thing at a time so you know what the changes your making are doing.

Yes the dump pipe made a difference with my EGT's when I did my exhaust...with the std fuel pump...
Depending on truck.. The Square Prado is the most restricted.. The Hilux the least...Newer shaped Prado in the middle..
As said do one adjustment at a time...
The Factory turbo turns into a hot air gun above 18 to 20 psi....(so I am told)
And is at the top end of its efficiency range.

The chips tend to just adjust the fuel level across the range and not at the times you need it. (not like a full remap)
You can also achieve this by adjusting up the spill valve...
Here is an interesting article..
http://www.lcool.org/technical/elec_die ... uning.html

IMHO
Do the dump pipe...
Drop the Boost down to 20 psi
Then adjust the chip box up or down until you find the sweet spot...

After that then its manual pump time.....As the electronic ones are not very tune-able...As you are finding out.

hello24 wrote:also if any one with experience on water injection can advise if this is normal. when i have the chip turned off and boost back to standard and i turn on the water injection (30% meth mix) at full throttle i see about 50c increse in temps obviously more power but is this temprature increse normal?

temps should go DOWN not up. i think your running to much meth. knock it right down to 10%. you won't get the power from the WI but you should get a lot more cooling.
what size nozzles are you running?

is it possible i am running to much boost for the turbo and might actualy see lower egts with less boost?

those turbo's are tiny, time to upgrade.
you really should be check the exhaust back pressure on the turbo. my guess is it will be through the roof which can cause high egt's.
which brings me to the next thing, cam timing. something you have to watch with stretchy cam belts and high exhaust back pressure.
i don't know with the 1kz but with the L series i know people have had good results by fine tuning the cam timing.

the chip seems to only add more fuel at 3/4 throttle and over.
as for the water meth i am using a 50cc pre turbo and 380cc post..... cooingmist system. i will try turning down the turbo 18-20 psi and let know the results. and if that dosnt make huge difference will adjust the chip... will the hilux dump pipe fit the square shape prado?

to me youv'e got to much of everything going on. As others have said change on thing at a time.

If your after better power(and lower egts) then to me the best thing would be to upgrade your turbo. Remember that a bigger turbo will pump more air than your exsisting one at the same pressure.
Also i'd just be going straight to 3inch exhuast all the way. Get a new flange cut and make your own dump.

hello24 wrote:will the hilux dump pipe fit the square shape prado?

No... As Prado goes over the chassis rail and down the outside of the rail before going back over .
The Hilux from memory goes straight out and back as its doesn't have to get past the transfercase...

Search the forum for dump pipes, been there done that and posted my build along with many others...

hello24 wrote:as for the water meth i am using a 50cc pre turbo and 380cc post..... cooingmist system.

what pressure pump and hows it triggered? boost switch or variable controller and at what pressure(s)?
where is the big nozzle placed in the intake system?

380cc/m (6gph) is fairly big. it should be running cold as an iceberg rather than getting hotter so something is not right. hopefully its just to much alcohol. try the 10% mix, you might find it bogging a little depending on what pump and trigger point is used etc.
for egt control you want it to be on fairly early to stop it heating up rather than try and cool it down after its gotten hot.

the big nozzle is just before the manifold on the crossover pipe. sounds as tho i should turn boost down a little and less meth as it does seem to use alot turns on at 7psi on a pressure switch.

got a pic of the nozzle location? it may be a too close to the manifold. usually keep the nozzle back from the intake so it spreads/mixes before branching off to the cylinders.

i would drop fueling back to stock, drop boost down to stock, get your temp base line recorded then work from there.
probably run boost around 15psi or so, adjust fueling but keep temps down to a safe level.
don't rely on the WI for temp control. start that at 10% alcohol and see what temp effects are at different on points. you might want to look at setting near max boost and use it to add power rather than cooling.

then your looking at a new turbo setup to be able to run 20psi+

thanks alot have just turned the chip down a fair bit. was a bit hopefull in thinking i would be able to run all that fuel but lots of room for adjustment if i decide its time for a bigger turbo...
but is a completly different truck to drive from standard....

Where did u get the chip for $200?

this company was $200nzd delivered from germany. http://www.no-limit-tuning.com/
they apparently do cheap common rail chips also

love the product but hard to get much info out of them over email.

Sweet thx .