My GU 4.2 Turbo Diesel
- Oetie
- Senior Member
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- Full Name: Leon Fouche
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Re: My GU 4.2 Turbo Diesel
DIe 35's lyk goed Michael
Nog enjin mods..?? sal maar geduldig wag...
Nog enjin mods..?? sal maar geduldig wag...
One life, live it to the fullest!!
ORRA - L65
HAM - ZS6LEF
Tlou - 2009 Patrol TD42T
ORRA - L65
HAM - ZS6LEF
Tlou - 2009 Patrol TD42T
-
- Senior Member
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- Full Name: Anthony Forgey
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- Michael
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- Joined: 05 Mar 2014 14:39
- Full Name: Michael
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- Current 4x4: Patrol GU 4.2 Turbo Diesel
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Re: My GU 4.2 Turbo Diesel
wow....... another year has passed and nothing really has changed on my vehicle besides a new set of rims, 11mm fuel pump (think I installed this one in 2018) and....... well thats about it
But I thought while there is a bit more time available I might just do a couple of engine mods that I have been planning to do for a while now.
In January I removed the very big front mount intercooler and replaved it with a 500x230x65 cooler and mounted it between the chassie legs to open up the radiator. This made a massive change to the water temp and I must have gained about 10 deg under load.
Next I want to install a Sojo intake manifold to see if there are any gains in power and maybe a bit lower EGT's.
But first I had to take it to the dyno for a run so we have a reference point.
I also want to test if there are any gains in power with a lift pump installed so depending on when the manifold will be ready for collection I might have the lift pump done first.
So here is the starting point for this excersize.
Power is 133kw and torque is 512Nm
This is measured at SAC Centurion, its measured at the wheels and its the same dyno I use for all my dyno's. So its something that will stay constant.
The lower power curve is a dyno run I did in 2017 with a maxed out 10mm pump. I think I was running around 0.8 or 1bar boost then and running 1.4 bar now
Interesting find, the 10mm pump made more power at 4,000rm than my current 11mm, but we will be investigating that a bit later. It might be the governer set too low.
But I thought while there is a bit more time available I might just do a couple of engine mods that I have been planning to do for a while now.
In January I removed the very big front mount intercooler and replaved it with a 500x230x65 cooler and mounted it between the chassie legs to open up the radiator. This made a massive change to the water temp and I must have gained about 10 deg under load.
Next I want to install a Sojo intake manifold to see if there are any gains in power and maybe a bit lower EGT's.
But first I had to take it to the dyno for a run so we have a reference point.
I also want to test if there are any gains in power with a lift pump installed so depending on when the manifold will be ready for collection I might have the lift pump done first.
So here is the starting point for this excersize.
Power is 133kw and torque is 512Nm
This is measured at SAC Centurion, its measured at the wheels and its the same dyno I use for all my dyno's. So its something that will stay constant.
The lower power curve is a dyno run I did in 2017 with a maxed out 10mm pump. I think I was running around 0.8 or 1bar boost then and running 1.4 bar now
Interesting find, the 10mm pump made more power at 4,000rm than my current 11mm, but we will be investigating that a bit later. It might be the governer set too low.
- Attachments
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- Patrol TD42 Torque 2020.jpg (273 KiB) Viewed 6623 times
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- Patrol TD42 Power 2020.jpg (278.23 KiB) Viewed 6623 times
"The Just shall live by Faith" Rom1:17
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
- Michael
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- Joined: 05 Mar 2014 14:39
- Full Name: Michael
- Nickname: Steyn
- Home Town: Centurion
- Current 4x4: Patrol GU 4.2 Turbo Diesel
- Home Language: Afrikaans
- Location: Centurion, PTA
- Has thanked: 189 times
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Re: My GU 4.2 Turbo Diesel
Lets start with the lift pump test.
Firstly, at the diesel shops they do the pump callibrations with a 0.2bar positive fuel supply and this is not something we have on the Patrols.
Measuring the fuel line pressure just before the filter I saw a constant -0,2bar fuel pressure which might be something that has a negative impact on the power delivery.
Aparantly the guys in Australia recomend giving your pump a positive fuel supply of 6psi when doing some power mods.
Theory is that if you start running on a negative fuel supply, the pump's internal pressure runs lower at high rpm and also you loose out on some timing advance.
I did install a Facet pump and measured the preasure on the fuel line. On idle it sits with a 0,2bar fuel pressure and falls to 0bar at 2,000rpm. Higher rpm it falls to around -0,1bar which still is not ideal. So I will be testing different pumos till I find something that can maintain a positive fuel supply and take it for another dyno run.
Stay tuned
Firstly, at the diesel shops they do the pump callibrations with a 0.2bar positive fuel supply and this is not something we have on the Patrols.
Measuring the fuel line pressure just before the filter I saw a constant -0,2bar fuel pressure which might be something that has a negative impact on the power delivery.
Aparantly the guys in Australia recomend giving your pump a positive fuel supply of 6psi when doing some power mods.
Theory is that if you start running on a negative fuel supply, the pump's internal pressure runs lower at high rpm and also you loose out on some timing advance.
I did install a Facet pump and measured the preasure on the fuel line. On idle it sits with a 0,2bar fuel pressure and falls to 0bar at 2,000rpm. Higher rpm it falls to around -0,1bar which still is not ideal. So I will be testing different pumos till I find something that can maintain a positive fuel supply and take it for another dyno run.
Stay tuned
- Attachments
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- 20200510_081726.jpg (2.25 MiB) Viewed 6631 times
"The Just shall live by Faith" Rom1:17
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
- hugejp
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Re: My GU 4.2 Turbo Diesel
Ek sien uit!
----------------------------------------------------------------------
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
- Michael
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Re: My GU 4.2 Turbo Diesel
Die voordeel is dat jou Patrol huidiglik op die operasie tafel is, so ek kan alles implementeer op jou Patrol wat ek doen op myne (indien dit werk)
"The Just shall live by Faith" Rom1:17
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
- hugejp
- Patrolman 1000+
- Posts: 2052
- Joined: 21 Oct 2014 21:01
- Full Name: JP Viviers
- Nickname: Oupoot
- Home Town: JHB
- Current 4x4: THE PATROL COLLECTION
2004 4.8 GRX TURBO "Tinkerbell"
2003 TD42T GRX "The Coal Roller" - Home Language: Half & Half
- Has thanked: 211 times
- Been thanked: 217 times
Re: My GU 4.2 Turbo Diesel
"Love your work!"
----------------------------------------------------------------------
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
You CAN with a NISSAN!
Jy KAN met 'n DATSUN!
- Tinus lotz
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Re: My GU 4.2 Turbo Diesel
Think we must measure my pressure becouse mine is at the back with such a long sucking line the npsh will come into acc...om te meet is om te weet
-
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- Full Name: Danie Terblanche
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1982 Chevrolet K5 Blazer 6.2 V8-Diesel
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Re: My GU 4.2 Turbo Diesel
Michael, die Aussie teorie maak 100% sin.
Die vloei en voor druk in die pomp is nie net belangrik om krag te maak nie maar as die druk te laag gaan, verander die pomp se timing & advance. Ek het 'n drukpomp in die lyn met 'n tuisgeboude pressure regulator na die filter wat die druk op 7,5 PSI hou. Dit wat te veel is, bloei terug na die return line. Die enjin start ook nou baie makliker, eerste keer. 'n 1Bar rotary pump werk goed.
Ek het dit lank gelede op my Blazer 6.2l gesit en het nooi weer terug gekyk nie.
Die vloei en voor druk in die pomp is nie net belangrik om krag te maak nie maar as die druk te laag gaan, verander die pomp se timing & advance. Ek het 'n drukpomp in die lyn met 'n tuisgeboude pressure regulator na die filter wat die druk op 7,5 PSI hou. Dit wat te veel is, bloei terug na die return line. Die enjin start ook nou baie makliker, eerste keer. 'n 1Bar rotary pump werk goed.
Ek het dit lank gelede op my Blazer 6.2l gesit en het nooi weer terug gekyk nie.
Danie
Live while you’re alive!
Live while you’re alive!
- Michael
- Moderator
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- Joined: 05 Mar 2014 14:39
- Full Name: Michael
- Nickname: Steyn
- Home Town: Centurion
- Current 4x4: Patrol GU 4.2 Turbo Diesel
- Home Language: Afrikaans
- Location: Centurion, PTA
- Has thanked: 189 times
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Re: My GU 4.2 Turbo Diesel
Dankie vir jou post Danie
Ek het toe uit eindelik n inline hoe druk pump van die John Deere trakkers ge instaleer op my Patrol en het nou n konstante 0,7bar positiewe druk op my diesel pomp.
Ek moet hom nog net vir die dyno vat om te sien hoe die krag verbeter het, maar engine loop stiller en krag is verseker beter!
Ek het toe uit eindelik n inline hoe druk pump van die John Deere trakkers ge instaleer op my Patrol en het nou n konstante 0,7bar positiewe druk op my diesel pomp.
Ek moet hom nog net vir die dyno vat om te sien hoe die krag verbeter het, maar engine loop stiller en krag is verseker beter!
"The Just shall live by Faith" Rom1:17
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
Check out my build here My Patrol
And my engine rebuild here mostly engine related stuff
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