Outer Limits 4x4 Board

G'day all
I have been searching through all the topics looking for some details on what you can do to a 2.8td.

i need some help on

boost levels and if you can bleed more psi in?????
next is if you can will it need more fuel if so how much and how do i do it


last one for the day has anyone seen or used eng-tek at
www.eng-tek.com.au

thank guys fo the help in advance

Chuck the 2.8 and put in a 4.2 TD !

Do a seach on GQ's buildup from a 2.8TD to a 4.2 TD

Mad Cruiser wrote:Chuck the 2.8 and put in a 4.2 TD !

Do a seach on GQ's buildup from a 2.8TD to a 4.2 TD

i knew someone was going to say this....

for more power if its a GU you could try moton's and probably get your injector pump worked over by a diesel specialist and get a 3" exhaust

Upping boost only on the GU 2.8 does nothing. Factory is 11.5 PSi and I upped it to 18 and you could not notice a thing - a bag of ice on the intercooler does more.

Also has a 3" mandrel bent straight through exhaust with no muffler fitted and I think I lost some low down torque (not much but enough for the 2.8 to notice).

The only thing that will help that is probably the cheapest option is to try a piggyback computer such as Motsons or Rapid. I had a Motson's and with boost increased to 14.5 PSi you get around 15% more power and around 30% more torque - nearly the same as a 3 litre GU with no increase in fuel consumption. Does blow a bit of black smoke though when worked hard.

By the way I have one for sale if you want it - $900 and its all your ($1400 from Motsons). Will even help fit. Dyno can be seen at http://members.optusnet.com.au/~grungle229/Patrol/images/motson's%20enhancer.jpg

Regards
David

....

morkz wrote:for more power if its a GU you could try moton's

Motsons you mean, and they dont do the 2.8 anymore.

bogged wrote:
Motsons you mean, and they dont do the 2.8 anymore.

yeah sorry about meant to stap motsons typo

do u know why they arent doing the 2.8's anymore

morkz wrote:

bogged wrote:
Motsons you mean, and they dont do the 2.8 anymore.

yeah sorry about meant to stap motsons typo

do u know why they arent doing the 2.8's anymore

they dont make them anymore, and more people are scrapping them.

Ahiscock the patrol4wd forum owner told me while sittin round a bent steering arm yesterday, a bloke in his club bought a 2.8 GU DX for $10k. I told him I'll take 2..

bogged wrote:
Ahiscock the patrol4wd forum owner told me while sittin round a bent steering arm yesterday, a bloke in his club bought a 2.8 GU DX for $10k. I told him I'll take 2..

how cheap is that.. all you would have to do is spend another 10k for a td42t conversion and your set.

morkz wrote:

bogged wrote:
Ahiscock the patrol4wd forum owner told me while sittin round a bent steering arm yesterday, a bloke in his club bought a 2.8 GU DX for $10k. I told him I'll take 2..

how cheap is that.. all you would have to do is spend another 10k for a td42t conversion and your set.

10k Id spend 12k and go the turbo chev.

bogged wrote:10k Id spend 12k and go the turbo chev.

yes you could do that to...

thats where i got my 4.6 ratios from linquip they had just done a 2.8 to v8 diesel conversion

morkz wrote:thats where i got my 4.6 ratios from linquip they had just done a 2.8 to v8 diesel conversion

how much?

bogged wrote:how much?

i bought them for $650 complete set

morkz wrote:

bogged wrote:how much?

i bought them for $650 complete set

centers, or C&P

bogged wrote:

morkz wrote:

bogged wrote:how much?

i bought them for $650 complete set

centers, or C&P

C&P cant believe what some people are asking for centres as well some are asking over $1300 with 4.1

morkz wrote:C&P cant believe what some people are asking for centres as well some are asking over $1300 with 4.1

Ive seen 4.1's go here for $200ea.. no market for them... everyone wants 4.3 or 4.6 or 4.88

yeah i know.......

mate just picked up some Gu diffs disc to disc with 4.3 at a steal for $2300

thanks for the help i'll think about the ecu...

i am tigging up the rest of the 3" system out of stainless this weekend at the moment there is about 2 foot of 3" pipe out of the turbo. i have being lazy.

What ever you do, exh is a good start, an increase in boost WILL require an increase in fuelling to be of benefit. Black smoke is OK under load as it at least shows fuel is getting in.

Bazzle

how can you put more fuel in...????

turdo wrote:how can you put more fuel in...????

isnt this done throught the injector pump

turdo wrote:how can you put more fuel in...????

In every case I have heard it is via a piggyback computer - I have never heard of anyone doing any mods to the pumps or injectors for increased fuel flow - I have on the GQ 2.8 which is mechanical but not the GU.

Regards
David

I have a ZD30 turbo suit 3ltr GU. I have had thought that this turbo would be well mated to a 2.8 as it is similar litres and diesel. It interests me because they are ball bearing and variable vane. They are a big turbo compared to the std turbo. The mating pattern on a ZD30 is triangular and I have a feeling that a 2.8 is the same (someone correct me if I am wrong). No one I know has a 2.8 to try it on but I want to try it. When I do I'll let you know how it went. I 3ltr is a little engine and they fly along quite well, so why can't it work on a 2.8. I actually have 2 ZD30 turbos and I would like to see how one would go with the turbo on it. Even looking at a 2.8GU to try myself.

Cheers

are you looking at selling one of the trubos...??? if so how much

Sorry to rain on your parade. But just how are you going to control the variable vane on the ZD 30 turbo without the ZD30 ECU? It won't work unless you have the electronics to make it work.
Regards Andrew.

you don't need the ecu.. it is quite easy to make a circuit board with a couple of chips to make it work thats if you know how....

They work on vacum for the variable vane. I was going to use a staged boost controller, that way you can have high/low boost options. After all it is still mechanically driven ie exhaust. I'll see what more info I can get. I paid $500 ea for them.

A Garrett variable vane turbocharger works by adjusting the gas throat section at the inlet of the turbine wheel in order to optimize turbine power with the required flow velocity.

At low engine speed and small gas flow, the turbocharger reduces the throat section, increasing turbine power and boost pressure. At full engine speed and high gas flow, the VNTâ„¢ turbocharger increases the throat section, avoiding turbocharger overspeed and maintaining the booster pressure required by the engine.

The throat section modulation can be controlled directly by the compressor pressure through the use of a pressure actuator, or by the engine management system using a vacuum actuator.

Cheers

what do you mean the motson are no longer doing the rd28 upgrades I got a information sheet about it earlier this week from them.

Grungle wrote:Upping boost only on the GU 2.8 does nothing. Factory is 11.5 PSi and I upped it to 18 and you could not notice a thing - a bag of ice on the intercooler does more.

Also has a 3" mandrel bent straight through exhaust with no muffler fitted and I think I lost some low down torque (not much but enough for the 2.8 to notice).

The only thing that will help that is probably the cheapest option is to try a piggyback computer such as Motsons or Rapid. I had a Motson's and with boost increased to 14.5 PSi you get around 15% more power and around 30% more torque - nearly the same as a 3 litre GU with no increase in fuel consumption. Does blow a bit of black smoke though when worked hard.

By the way I have one for sale if you want it - $900 and its all your ($1400 from Motsons). Will even help fit. Dyno can be seen at http://members.optusnet.com.au/~grungle229/Patrol/images/motson's%20enhancer.jpg

Regards
David

....

will you also do the dyno tuning?