1HZ Powerupgrades

[Z()LTAN]

Everything i know about getting decent power out of a 1HZ without spending a bucket load of money.

http://outlaws4x4.com/?page_id=266/toyo ... ups/#p1229" onclick="window.open(this.href);return false;

[rockcrawler31]

need to be a member to access that site. Not sure they'd appreciate me signing up just to have a look at one thread.

[cruzinnboozn]

I did.

For those playing at home.

I am by no means the guru in regards to these engines but i believe i have been able to get some decent power from the 1HZ.
I get alot of people asking me what i have done to my 1HZ to make it go the way it does, ive always been reluctant to share the nitty grittys of the engine setup but now that i believe that i have outgrown it i will.

Choosing your 1HZ:
Any 1HZ will be interchangeable with another, its only the smaller ancillary things that differ - all of which can be changed to suit.
My 1HZ is a late 07 model out of a 100 series. It has an atmospheric diaphragm on the injector pump that in this model was changed from the plate style one (only good for minimal atmospheric fuel ratio changes) to one capable of servicing as an aneroid (boost sensing). I have it set very low so max fuel can be delivered just off idle, so far EGTs have been easily controlled with minimal pump timing advancement and boost.
It also has larger injectors and larger 11mm plungers in the injector pump as standard.

Forced induction:
There has been alot of discussion on this over the years, im not going to try and convince you of anything im only going to tell you the facts.
Im running a Garrett GT2876R with a .64 turbine A/R and a .70 Compressor A/R, DTS log style split pulse manifold, 2 piece T3-T25 adapter, 15psi wastegate with manual bleed screw.
The DTS manifold and head were basically port matched to optimize flow.
The waste gate is preloaded shut a fair bit, this fights what is called 'waste gate creep' which slows your spool speed.
I built a 3" dump pipe and a 1/2 1/2 MS and SS exhaust ending before the rear diff.

Turbo Intake system:
The GT2876R on the 1HZ will have a very quick spool speed so it is essential to have an intake capable of flowing the needed air with minimal restriction.
I purchased the largest cylindrical flanged style filter i could fit in the engine bay (9" long 7" round with a 4" flange). Built a box with enough room around the filter for even dispersal. Fitted 2 4" bends from the air box directly to the turbo inlet.
Fitted a 4" SS snorkel that could even be changed to 5" as i got a bit of restriction from it. (yes air suffers from friction)

Engine Intake system/intercooler:
To keep boost response as fast as possible and storage capacity as large as possible i built a one piece intake/intercooler.
The turbos outlet is directly coupled to the intercooler elbow and dispersal funnel, internal to this funnel are a row of louvers that split the air pulse up and direct it evenly over the entire length of the core.
The cooler is 2 separate systems side by side with coolant flowing oppositely so effectively 2 coolers. The cores are the length of the intake manifold, 250mm wide and 100mm thick welded side by side, with 4 separate coolant end tanks.
The intake runner from the output side of the intercoolers has been opened up and welded straight down to the OEM bottom 1/2 of the manifold.
2 Bosch cobra pumps supply the cores with coolant from a 970x550x100mm radiator behind the cab.

Tips and tricks:
Ensure you are getting WOT (wide open throttle) adjust linkages and cables as required.
Wastegate preload, stop creep.
Keep your engine cooling system up to scratch
Keep EGTs 550degc post 700 pre.
Regular oil changes to remove acidic buildup in oil from diesel washdown.

Take all of this with a grain of salt, i am not driving this every day on the road. There may be other/better ways of doing things.

Good Luck with your 1HZ power upgrades!

[Jonno308]

Just a question on that. Since I have never seen it done, I'm guessing it's coz it does'nt work, But can a 1-HZ be supercharged? I was thinking of like a commodore V6 one or a 3/71 roots blower or those new sprintex ones they are putting on the petrol cruisers these days. Is there a reason they don't use them on diesels?

[Z()LTAN]

The main reason people use turbos instead of superchargers is firstly cost and secondly the fact its utilising 'free' energy.

Superchargers heat the air up massivly aswell as cover only a minimal percentage of the rev range as 'efficient'

Nowdays turbo technology and attainability have shown them to be the weapon of choice in all current power builds.

[Shadow]

The main reason people use turbos instead of superchargers is firstly cost and secondly the fact its utilising 'free' energy.

Superchargers heat the air up massivly aswell as cover only a minimal percentage of the rev range as 'efficient'

Nowdays turbo technology and attainability have shown them to be the weapon of choice in all current power builds.

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

For high end drag cars(top fuelers etc) NHRA rules dont allow them to use a turbo(they specify roots type forced induction), thats why they aren't used in that class of drag car. Everything smaller is pretty much dominated by turbo's.

there is no reason for a diesel to be specifically better to use a turbo or supercharger. Turbo's are just a shipload cheaper and easier to install, and always a much more efficient way of producing more power(except for low revs)

[Jonno308]

Very good point. The extra power straight from idle would be an advantage but turbo sounds like a more logical idea. I'm hoping to put one on my 1-HZ soon.
If I had more dollars than sense, I would love to install one of those 6.5 Chevy v8 diesels and bolt a nice 6/71 to it. It would definitley look and sound awesome Well, at least it's free to dream...

[Shadow]

Very good point. The extra power straight from idle would be an advantage but turbo sounds like a more logical idea. I'm hoping to put one on my 1-HZ soon.
If I had more dollars than sense, I would love to install one of those 6.5 Chevy v8 diesels and bolt a nice 6/71 to it. It would definitley look and sound awesome Well, at least it's free to dream...

those 6.5 chevy v8 diesels are POS

Duramax or 1VDFTE is the only v8 diesels that should be considered

[Z()LTAN]

Whats turbo lag?

[Shadow]

Whats turbo lag?

serious?

the difference between idle and rpm when turbo hits full boost.

[Z()LTAN]

lol...

i forget its hard to portray sarcasm from behind a keyboard..

[dogbreath_48]

Whats turbo lag?

serious?

the difference between idle and rpm when turbo hits full boost.

I don't think it is. It's the time the turbo takes to produce full boost (for a given RPM) when getting onto the throttle irrespective of RPM...it so happens that lag is most prevelant in the lower RPM range.

[Northside 4x4]

Lag is how long to achieve full boost once (closed to WOT) above the boost threshold.
Boost threshold is the rpm at which the motor is able to produce full boost.

[80's_delirious]

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

not all correct IMHO

Roots type superchargers are known as superheaters. they are far less efficient than turbo's, centrifugal superchargers, screw type superchargers.

A properly matched turbo will have almost NO lag on a diesel

superchargers are more complex to install and align brackets, pulleys, belts, etc

[80's_delirious]

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

not all correct IMHO

Roots type superchargers are known as superheaters. they are far less efficient than turbo's, centrifugal superchargers, screw type superchargers.

A properly matched turbo will have almost NO lag on a diesel

superchargers are more complex to install and align brackets, pulleys, belts, etc

[80's_delirious]

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

not all correct IMHO

Roots type superchargers are known as superheaters. they are far less efficient than turbo's, centrifugal superchargers, screw type superchargers.

A properly matched turbo will have almost NO lag on a diesel

superchargers are more complex to install and align brackets, pulleys, belts, etc

[80's_delirious]

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

not all correct IMHO

Roots type superchargers are known as superheaters. they are far less efficient than turbo's, centrifugal superchargers, screw type superchargers.

A properly matched turbo will have almost NO lag on a diesel

superchargers are more complex to install and align brackets, pulleys, belts, etc

[80's_delirious]

A super charger and a turbo charger will introduce similar amounts of heat into the pressurised air and the efficiency of a supercharger is pretty linear i thaught?

The down side to a turbo is turbo lag.
The upside to a turbo is the almost free method of spinning the compressor wheel.

The down side to superchargers is cost!!!!!, more difficult to install, and most importantly it can take alot of HP to turn the supercharger.
The upside to a supercharger is boost from idle(sounds great for a 4wd right?)

not all correct IMHO

Roots type superchargers are known as superheaters. they are far less efficient than turbo's, centrifugal superchargers, screw type superchargers.

A properly matched turbo will have almost NO lag on a diesel

superchargers are more complex to install and align brackets, pulleys, belts, etc

[dogbreath_48]

Lag is how long to achieve full boost once (closed to WOT) above the boost threshold.
Boost threshold is the rpm at which the motor is able to produce full boost.

That was a far better way of explaining it! Too much

[Shadow]

alright, im not an expert.

i didnt need to be told 5 times :(

[80's_delirious]

alright, im not an expert.

i didnt need to be told 5 times :(

Oops! well you really should just be happy I didn't think you were like a farking computer and needed to have the info punched into you 5 times