Outer Limits 4x4 Board

Got a GU III. Is an exhaust upgrade worth it? ie, make it a bit easier to drive lower in the rev range or is a chip the only way to boost low end performance?

Also, what's a good suspension upgrade? Mainly day to day driving, maybe an inch higher. I get the feeling that when the thing hits a reasonable bump, the suspension seems to oscilate a bit instead of just soaking it up.

Regards,
g@z.

I got a dpchip and an exhaust after reading people on forums say it fixes the low end gutless problem - it didn't. It definitely improved things otherwise though, but it still sucks until the turbo is working.

If you only want an inch or so suspension, I'd take it to ARB for their standard OME upgrade

jimsaq wrote:I got a dpchip and an exhaust after reading people on forums say it fixes the low end gutless problem - it didn't.

maybe the DPchip is not as good as the Dtronic? Everyone swears by them..

so the handgrenade has no low end power.... 4cyl donk, large car, cant expect miracles...

Don't complain, you could be worse off with an old TD42 boat anchor.

patrolmad wrote:Don't complain, you could be worse off with an old TD42 boat anchor thats still going strong 600,000klms later with no issues..

I agree

Thanks for the replies.

I see the other diesel makes out there are getting more power and torque with the same or less capacity, so it's not unrealistic to say it's a good combination of size and power for the truck. Just a bit lacking down low.


Regards,
g@z.

bogged wrote:

patrolmad wrote:Don't complain, you could be worse off with an old TD42 boat anchor

I agree

For once we agree on something bogged!!!

patrolmad wrote:

bogged wrote:

patrolmad wrote:Don't complain, you could be worse off with an old TD42 boat anchor thats still going strong 600,000klms later with no issues..

I agree

For once we agree on something bogged!!!

Yup, I doubt that 1 3.0 GU will ever see them klms.. Well, on the back of a towy on the way to nissan for engine rebuild, or turbo rebuild, or new air con pulleys, or gearbox... or........

Only time will tell.
My series III 3.0 has just ticked over 397,000kms and is still untouched apart from a clutch.....touch wood!!!
When it gets to 600,000 kms in 2 years time, I'll let you know.

Um, back on topic please? I don't want t to become another 3.0 bashing thread.

Maybe some theory? Is a larger exhaust a good thing? ie, less stress on the engine? or does the increased flow (if any) mean turbo spins up a bit faster and actually pust more stress on the engine?

Has anyone in Melb ever fitter an EGT probe? If so who did it?

Regards,
g@z.

Sorry g@z.

I have often thought about fitting a larger exhaust to my 3.0 but having spent countless $$$$ on exhaust upgrades on 4.2 petrol and diesel Patrols over the years for little or no benefit have refrained from doing so. The major benefit IMO of fitting a larger diameter pipe is that they generally sound better with the right muffler and therefore you think they are going better!!!!

yeah, I put off putting headers on my L28 for years, but it did make a difference to the thing when I did.

However I've never had a turbo engine, let alone a diesel one, but one of the first mods people do to turbo engines is an exhaust. I'm just not sure if it's worth it and want to hear from people that have. I think Roly did from the 4x4 yahoo group, but that was ages ago. I hear 'get a chip'... 'nah, get exhaust'.

I think I'll get an EGT probe fitted. Then I'll get a consult interface and do some logging. Then I'll get an exhaust with a pre and post dyno.

I think I'll also add one of those intercooler fans that kicks in at low speed and log the data on that. That way I can preesnt some data on the mods so that anyone else can see what works and what doesn't.

Regards,
g@z.

g@z wrote:I think I'll get an EGT probe fitted. .

You can fit them yourself, we did my GQ and mates in a weekend. Fairly easy.

Blokes down at Auto Gas Convesions in Carrum Downs Dyno'ed a Diesel GU the other week for a dyno run that had a bigger zaust put on, with no other pump mods and only gained 10kw.

Awill4x4 maybe able to rememebr which donk it was, I'm gettin mine dynoed before and after each mod by Shane down there so I can see what does what increase or decrease.

thats acutally a really good idea g@z...

I wanted to fit boost and EGT gauge before i made any mods (such as exhaust, chip etc)
But i ended up just going and getting the exhaust done. Couldn't be stuffed waiting/screwing around.

Um, back on topic please? I don't want t to become another 3.0 bashing thread.

with bogged online? It's a bit inevitable.

Maybe try the forums at patrol4x4.com mate. People seem to be a little bit less "anti-3.0L bandwagon" there...

DEEV8 wrote:with bogged online? It's a bit inevitable.

Vice President of the Hate Handgrenade Patrol Club.

DEEV8 wrote:thats acutally a really good idea g@z...
Maybe try the forums at patrol4x4.com mate. People seem to be a little bit less "anti-3.0L bandwagon" there...

That's probably because they have experienced first hand that not all ZD30's are lemons unlike others on this thread and are prepared to move with the times and appreciate the benefits of a little technology.

Bogged is from the stone age and will not think past the old fork lift engines
of the past.

bogged wrote:

DEEV8 wrote:with bogged online? It's a bit inevitable.

Vice President of the Hate Handgrenade Hype "heard from a mate of a mate" Bandwagon Patrol Club.

I agree.

stool wrote:Bogged is from the stone age and will not think past the old fork lift engines
of the past.

Coming from a RD28 owner

DEEV8 wrote:

bogged wrote:

DEEV8 wrote:with bogged online? It's a bit inevitable.

Vice President of the Hate Handgrenade Hype "heard from a mate of a mate" Bandwagon Patrol Club.

I agree.

call it hype if you will

Please knock it off will yas?

I had a look at some of the posts at the other site. Talk of blocking EGR vavles.

I had a chat to a bloke called Ray someone in Thomastown. Said that he thinks some of the failures he's seen have been related to the EGR valve somehow. Not 100% sure what he meant but he seemed to think that the early models EGR valve fell to bits, or got damaged and was not controlled by the ECU properly.

He seemed to believe that a tunable chip was the best option to get more out of it, and that only a unichip could be tuned to correct issues with the EGR valve. ie, reduce it's operation so that it does not open as much or flutter (I think that's what he was trying to imply about it's operation) and destroy itself and then get sucked up into the engine, or fail open and let in too much exhaust.

Also seemed to think that the series III was fixed or much better in this regard.

Can anyone add any more to this that's not 3l bashing?

Regards,
g@z.

how big is your exhaust ? if it is factory i would go a 3 inch mandrel bent exhaust at the minimun . be a little careful when putting a chip on a motor as if it can be used to void your warranty in any way it will be. And with a zd30 you need every bit of warranty you have.

bogged wrote:so the handgrenade has no low end power.... 4cyl donk, large car, cant expect miracles...

try to comprehend the flow of a conversation mate nobody has said anything to indicate they are expecting miracles. I simply said that some people claim chip/exhaust fixes the issue, but I didn't find that to be true myself.

g@z: you can fix the issue for low range driving by fitting low range reduction gearing, but I suspect in highrange your only really noticeable options will be to run small tyres, maybe get lower diff or some super custom 1st gear

I stuck marks adapters 85% reduction gears in mine and the gutless low end issue is non-existant even with 36" rubber, here's a bit of an example http://www.youtube.com/watch?v=KmWFAYRzmww