ZD30 Boost

[Steve69]

Hi All,

Newbie to patrols and just getting my head around the boost issues with the ZD30.
Currently running std setup with a 3" mandrel exhaust with 1 muffler and no cat.
Fitted a pillar pod with egt and boost gauges. Fitted a dawes valve no egr block off yet.
Currently i get a max boost of 14psi and at 100kms around 3psi.
Egt at 100 is at 350 these figures are with or without the dawes valve installed.
Egt climbs quickly if you work it hard.
What is the std boost for a 12/01 zd30 auto ?

Steve

[MEGOMONSTER]

The above sound just about right.
I get similar numbers on my GU8.

[Steve69]

Thanks MEGOMONSTER

[threedogs]

Check Chaz Yellowfoot{guru} threads on this subject,
general rule of thumb is 2000rpm = 10 psi
Fitting a needle valve can controll spool up rate
You can't put too much boost into these motors.
Only so much to do to the Z30, IMO chip, exhaust and NADS, for longevity
Is it 350 C?

[Steve69]

Yeh THREEDOGS


350C.

Was a litte concerned about the lack of boost and the rise of the EGT.
Have previously read some of chaz's threads and still a bit confused of the boost spike.
The current highest boost i have recorded is 14 psi. ( with or without the dawes valve connected)
Ive been driving this patrol for the last 8 months and just purchased it 1 month ago.
Heading off in 5 weeks to the Kimberly for 7 weeks.
Stdcar except i have added the 3" exhaust and have the egr blank to fitt and a spare manifold cleaned of all the gum to fit as well.3
Do you think 350c is high or ok ?


Steve

[threedogs]

Next time you are up this way drop in I'll check it for you if you like. I'm just off ringroad near Ballarat RD
Anything under 500 is good, but wont hurt to double check, did you blank off the vacuum hoses on the vacuun solenoid??
Blowing much black smoke if any,Maybe a dyno before you head off, may need to dial more boost into it IMO

[Steve69]

Cheers THREEDOGS

bit slow to reply been working on the camper all day.

Not sure which vacc hoses you are refering to ?
I did run it up on the dyno before doing the exhaust and it ran 78 R W KW factory is 116KM at the flywheel , so allowing for 30% drive train loss.
Im running 285/75/16 so pretty close to std readings.

Might have to take you up on the offer over a beer.

[BearGUST]

350 deg is fine.
I look at it like a cooling system, they can run all day at around 100 deg but if they go over their safe temp things go bad. EGT's are similar, as long as they stay below 500-550 you are pretty right.

[Rumcajs]

Hi All,

Newbie to patrols and just getting my head around the boost issues with the ZD30.
Currently running std setup with a 3" mandrel exhaust with 1 muffler and no cat.
Fitted a pillar pod with egt and boost gauges. Fitted a dawes valve no egr block off yet.
Currently i get a max boost of 14psi and at 100kms around 3psi.
Egt at 100 is at 350 these figures are with or without the dawes valve installed.
Egt climbs quickly if you work it hard.
What is the std boost for a 12/01 zd30 auto ?

Steve

That's standard stuff with unmodded (NADS) ZD30 and EGR functioning. ECU turns on EGR full bore when cruisn so it needs to drop boost in order to get exhaust gases in to intake manifold.
Welcome to the ZD30 diabolical tech. You need to take the control of the VNT turbo away from the ECU and stop exhaust gases from reaching inlet manifold.
Cheers

[Steve69]

Thanks, BEARGUST

Got the L plates and learning