Max boost

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Max boost

Postby Silverfox1111 on Tue, 27 Feb 2018 1:35 +0000

Gday all
What is the maximum boost people are seeing on their 'luxs?
The most I've seen, via a scanguage, is 14lbs. On bookface their are some claiming 18 to 20lbs on a standard motor.
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Re: Max boost

Postby HK1837 on Tue, 27 Feb 2018 1:52 +0000

6.5psi on my V6! I wonder how long a standard diesel would live for running 20psi?
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Re: Max boost

Postby Tyler1993 on Tue, 27 Feb 2018 2:40 +0000

21 psi on my diesel.
Only engine mods are egr restrictor and steinbaur chip


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Re: Max boost

Postby Sparksy on Tue, 27 Feb 2018 2:56 +0000

Stock I believe 14-16 psi is the most it can go.
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Re: Max boost

Postby rory18 on Tue, 27 Feb 2018 8:16 +0000

I run 35-36 psi in my ute
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Max boost

Postby Tyler1993 on Wed, 28 Feb 2018 6:18 +0000

Does anyone one know if my high boost is because of something faulty.
Like I said only mods are steinbaur and egr plate, to my knowledge neither of these should increase boost, but not 100% on that one.
TOYZ said he has seen boost that high with a faulty stepper motor, but I have had no engine light or limp mode?

Is 20psi bad and should I be looking for something faulty?


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Last edited by Tyler1993 on Wed, 28 Feb 2018 7:21 +0000, edited 1 time in total.
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Re: Max boost

Postby sa_lux on Wed, 28 Feb 2018 6:29 +0000

G'Day Rory

rory18 wrote:I run 35-36 psi in my ute


Are you talking tyre pressure here ?
Looking to buy

- 54" Led Light Bar to Roof Rack mounting kit
- Roof Top Tent
- Tub Transformer (TT) -> http://ozutz.com.au
- e Lockers
- 12v / 240v Fridge -> http://www.ebay.com.au/itm/221680219455

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Re: Max boost

Postby Gipsy on Wed, 28 Feb 2018 8:02 +0000

Depends how/where it is measured... Some you need to deduct atmospheric pressure. if this is the case 36 psi less 1 ATM =around 12-13psi boost. Boost is anything above atmospheric pressure. Does this make sense?
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Max boost

Postby Gipsy on Wed, 28 Feb 2018 8:16 +0000

Tyler1993 wrote:21 psi on my diesel.
Only engine mods are egr restrictor and steinbaur chip


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Tyler, it is possible 20psi max is because your egr plate/restrictor reduces exhaust bleed through the egr thus increasing what you see on the boost gauge. Could be faulty stepper leaving the vanes in the wrong position though? Engine light would normally indicate if there is a problem though.

Edit...oops maybe I could have explained that better... Egr plate increases exhaust gas volume/pressure in the manifold which may spin the turbo up better thus increasing boost. Not sure about steinbauer though whether it increases boost by fiddling the sensors.

Edit edit.. Somewhere boxhead talked about the variability of boost measurements depending on where you tap the gauge in.
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Max boost

Postby TOYZX on Wed, 28 Feb 2018 9:04 +0000

The egr plate will help spin it up faster but the computer should still dictate what max boost it unless the chip is altering it. Shouldn't be that high tho if measured at the correct spot.

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Re: Max boost

Postby Gipsy on Wed, 28 Feb 2018 9:16 +0000

Agreed
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Max boost

Postby Sparksy on Wed, 28 Feb 2018 10:50 +0000

sa_lux wrote:G'Day Rory

rory18 wrote:I run 35-36 psi in my ute


Are you talking tyre pressure here ?


If this is the bloke I'm thinking of on modified, he's not talking tyre pressure at all. :lol:
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Max boost

Postby Tyler1993 on Wed, 28 Feb 2018 11:03 +0000

I have tapped into the boost line where it comes out of the manifold, just before the map filter.

So really the reading should be the same as what the factory sensor is sensing.
I’m just starting to get abit worried now that there could be something wrong and sure enough it will raise its head when I’m out in the middle of nowhere
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Sorry another engine mod is a modified exhaust. Stock dump pipe with no cat that joins to a 3 inch to the back with a hotdog muffler


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Re: Max boost

Postby TOYZX on Wed, 28 Feb 2018 12:14 +0000

What happens when you pull the chip out? Id be worried its running lean with that much air getting shoved in there!

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Max boost

Postby Tyler1993 on Wed, 28 Feb 2018 12:32 +0000

No change in boost with the chip unplugged, that was my first thought.
Only difference with it out is power loss and slightly lower EGTs, boost remains the same

Have also tried a different boost gauge caus I thought maybe the redarc one was off.
But both gauges read the exact same
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Re: Max boost

Postby Silverfox1111 on Wed, 28 Feb 2018 12:45 +0000

Are we all talking about the same model of hilux?
Mine is a 2017.
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Re: Max boost

Postby sa_lux on Wed, 28 Feb 2018 12:50 +0000

G'Day Sparkys

Sparksy wrote:he's not talking tyre pressure at all. :lol:


I didnt think he was, just a very poorly delivered joke on my part :oops:
Looking to buy

- 54" Led Light Bar to Roof Rack mounting kit
- Roof Top Tent
- Tub Transformer (TT) -> http://ozutz.com.au
- e Lockers
- 12v / 240v Fridge -> http://www.ebay.com.au/itm/221680219455

Roll on rolux
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Re: Max boost

Postby Gipsy on Wed, 28 Feb 2018 1:12 +0000

Check out boxhead's views on where to tap in:

http://www.newhilux.net/forum/viewtopic ... 3&start=20

by boxhead55 on Sat, 01 Nov 2014 10:56 +0000

Yep but I would not t into that as it will fudge the map sensor. Not by much but data does not lie. I would tap a new hole somewhere just for the boost guage.


boxhead55 on Sun, 02 Nov 2014 3:17 +0000

I have seen heaps taped into the steal pipe from the turbo to the intercooler. Easy to take off and drill I guess. 4 10mm bolts and a hose clamp.
Also if you tap into the map hose you will get fluctuations in the reading due to the throttle plate opening and closing as it needs to. By putting it in the pipe you will get the exact boot reading uneffected by the egr and throttle plate
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Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Max boost

Postby Gipsy on Wed, 28 Feb 2018 1:26 +0000

Tyler, your exhaust would have some effect also because the gas flow is improved.
Cheers Gipsy :D although I'm sure somebody will challenge that :lol: even Einstein wasn't certain of his theories.
My 2013 auto D4D DC SR5, prefilter, 3" exhaust and Chip with egt probe, stock SR5 rims with Toyo Open Country AT2 265/65R/17's
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Re: Max boost

Postby Tyler1993 on Wed, 28 Feb 2018 2:20 +0000

Thanks for that gipsy!
I might try to tap into a different place and see if it affects the readings.
If the readings are the same do you think it’s something I should worry about?

And no sorry silver fox mine is 2010


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