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Any ideas how to get more power out of a RD28T

Tech Talk for Nissan owners.

Moderators: toaddog, V8Patrol

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Posts: 13
Joined: Mon Jul 23, 2007 4:02 pm
Location: Oxenford

Any ideas how to get more power out of a RD28T

Post by HI-LUXury »

I have a gu with a rd28t, and I want to know if I can upgrade the turbo or something to get more grunt.

Cheers
Posts: 377
Joined: Mon Mar 20, 2006 5:52 pm
Location: Geelong

Post by tj81 »

take it out, and put in an RB25DET
92 LWB Ford Maverick 4.2, Dual Fuel.

99 GU ST 4.2 Turbo Diesel, Non Intercooled, Tigerz11 w/synthetic, 35"' Bighorns, ARB Compressor, Snorkel.
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Joined: Mon Jul 23, 2007 4:02 pm
Location: Oxenford

Post by HI-LUXury »

tj81 wrote:take it out, and put in an RB25DET
what is needed to do that?
Posts: 377
Joined: Mon Mar 20, 2006 5:52 pm
Location: Geelong

Post by tj81 »

Front cut of an R34 Skyline, with Engine, ECU and Loom.

Change sump, engine mounts, acessories over etc.

Bolt in where RD28 was.

Plumb up intercooler.

Plumb up power steering using a GU 4.5 hose.

plug it all in, fire up ...

Seen the above done in front of me, beleive the motor was round 2 grand.
92 LWB Ford Maverick 4.2, Dual Fuel.

99 GU ST 4.2 Turbo Diesel, Non Intercooled, Tigerz11 w/synthetic, 35"' Bighorns, ARB Compressor, Snorkel.
Posts: 13
Joined: Mon Jul 23, 2007 4:02 pm
Location: Oxenford

Post by HI-LUXury »

is there any other way, eg. bigger turbo? tuning?
Posts: 377
Joined: Mon Mar 20, 2006 5:52 pm
Location: Geelong

Post by tj81 »

should have elaborated.

reason for RB25DET going in, was RD28 shit itself when more boost, modified pump, and general quest for more power were tried.
92 LWB Ford Maverick 4.2, Dual Fuel.

99 GU ST 4.2 Turbo Diesel, Non Intercooled, Tigerz11 w/synthetic, 35"' Bighorns, ARB Compressor, Snorkel.
Posts: 45681
Joined: Wed Nov 27, 2002 10:13 am

Post by bogged »

What is your budget?

Then go from there. Bloke on patrol forum is killing himself that he blew thousands rebuilding his 2.8, regrets it totally. wishes he went with an engine swap instead.
Posts: 13
Joined: Mon Jul 23, 2007 4:02 pm
Location: Oxenford

Post by HI-LUXury »

Just checking my options, either do some upgrades or engine conversion, or buy a gu with a rd42t.

Was keen of hoping for a couple of ideas
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Joined: Wed Nov 27, 2002 10:13 am

Post by bogged »

HI-LUXury wrote:Just checking my options, either do some upgrades or engine conversion, or buy a gu with a rd42t.

Was keen of hoping for a couple of ideas
that would be TD42T ;)

So you dont have the 2.8? The reason they are cheap, they have head issues, and they are fairly underpowered... Chev V8 Diesel conversion round $23k..
May other conversions out there, but doing the work isnt for everyone.

Motsons in Qld used to do a chip for them, but I dont think they still do.

plenty of threds on patrol4x4.com about them, and powerups. The best value in the end usually is an engine swap.
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Location: Gettin my teef knocked out by tufflux88

2.8

Post by k3lst »

t unit chip for the 2.8 cost rough $1200, bigger exhaust fitted $1500 or so.

thats my plan, good thing is if it shits itself you could prob offload the chip by itself for 900 bucks.
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Location: townsville

Post by brad-chevlux »

buy an RB30,
buy an r33 skyline front cut, remove tiny 2.5L bottom end and add in said RB30 bottom end.

then follow his instructions.
the turbo will be a tad small but will be on boost quick and will hold to about 6000rpm (all you really need in 4by anyway)
tj81 wrote:Front cut of an R34 Skyline, with Engine, ECU and Loom.

Change sump, engine mounts, acessories over etc.

Bolt in where RD28 was.

Plumb up intercooler.

Plumb up power steering using a GU 4.5 hose.

plug it all in, fire up ...

Seen the above done in front of me, beleive the motor was round 2 grand.
http://www.mothfukle-engineering.com/
Posts: 51
Joined: Sat Nov 01, 2003 8:04 pm
Location: Sydney South

More power

Post by USERNAME »

Ihave chiped my 2.8 goes a little better , wish i transplanted a bigger motor as i have spend 10k rebuilding this little 2.8 motor :cry:
Posts: 272
Joined: Sun Sep 07, 2008 11:00 pm
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Re: More power

Post by k3lst »

USERNAME wrote:Ihave chiped my 2.8 goes a little better , wish i transplanted a bigger motor as i have spend 10k rebuilding this little 2.8 motor :cry:
sell your chip to me then! :rofl:
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Post by weeman »

I'd just chev with a 6L or GU 4.2 turbo motor with turbo and intercooler would be ok but to be honest forget the chev 6.5 i went in one and its a piece of shite...
For all your HID and LED stuff
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Re: 2.8

Post by macneil »

k3lst wrote:t unit chip for the 2.8 cost rough $1200, bigger exhaust fitted $1500 or so.

thats my plan, good thing is if it shits itself you could prob offload the chip by itself for 900 bucks.
1500 bux for an exhaust!! whos doing it? bill gates or something..

you can get them for about 400 bux..
Posts: 24
Joined: Thu Aug 16, 2007 9:53 am
Location: Brisbane

Post by 50RTD »

Those 2.8's have the smallest turbo i've ever seen, it looks like a bloody sausage mcmuffin with an air filter hanging off it, ridiculous.

Whats the best way to go about upgrading the turbo? They're a Garrett unit, but have a 3 bolt triangle rear housing, which isnt exactly common?

Surely the 2.8 should have enough grunt to spool something more biggerer?
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Location: Melbourne

Post by mikmav »

On my 2.8.. I recently got 2.5" exhaust and it made a reasonable difference, still no rocket ship, but certainly much nicer to drive now.

I guess it all depends how much extra power you're after...

EDIT: my exhaust was $750ish, mandel bend etc.. very happy with it..
from ringwood performance exhaust.
Last edited by mikmav on Sat Feb 21, 2009 3:26 pm, edited 1 time in total.
--
98 GU.. front locker, cheezy sliders, 33's, winch etc.. .... long shopping list.
Posts: 272
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Re: 2.8

Post by k3lst »

macneil wrote:
k3lst wrote:t unit chip for the 2.8 cost rough $1200, bigger exhaust fitted $1500 or so.

thats my plan, good thing is if it shits itself you could prob offload the chip by itself for 900 bucks.
1500 bux for an exhaust!! whos doing it? bill gates or something..

you can get them for about 400 bux..
pay peanuts and you will get monkeys my friend. who FITS complete exhausts for a gu for $400?? :finger:
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Joined: Tue May 30, 2006 7:04 am
Location: Portugal

Post by eduardo »

Gday

Although a RD28T is a rather week engine, and future head/gasket problems should be expected, a god setup would be mercedes E270 or E320 variable geometry turbo (garret A22 e A28), and audi allroad 2.5 modified injector pump....
Plus....air/water intercooler, 6th cilinder cooling and bipass the cab heater, electrical fans, mecanical valve lifters, improved air intake and straight exaust pipe...

This shoul do it, you cant go above 250hp's cause the distribution belt will slip at crank pulley....

GdLuck
Posts: 213
Joined: Tue Jun 10, 2008 8:54 pm
Location: brisbane

Post by lewie »

nissan should test their diesel engines alot better before selling, 2.8/3.0 sh#t loads of serious problems f#n idiots. If big free flowing exhaust, intercooler and larger air intake are installed on say a GQ 2.8 motor before it has any serious problems should this help to get the hot air through motor quicker instead of loading up and not being able to get out of that crappy little standard exhaust quick enough to keep engine temps down??

Most 2.8s that have failed have been standard. I think these mods done before head is frigged will help a great deal in keeping top end temps down. well ive done them to mine before head has failed so time will tell i guess...
beer gimme gimme ! ! !
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Location: vic

Post by gq351 »

just drop a big v8 in it :D power problem solved!!
GQ patrol '454' Big Block Chevy 7''lift 37'' muddies & heaps more...
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Post by bogged »

gq351 wrote:just drop a big v8 in it :D power problem solved!!
just not a 351 eh ;)
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Location: vic

Post by gq351 »

bogged wrote:
gq351 wrote:just drop a big v8 in it :D power problem solved!!
just not a 351 eh ;)
haha well the 351 went good while it lasted, but i think ill stick to the chev from now lol :D
GQ patrol '454' Big Block Chevy 7''lift 37'' muddies & heaps more...
Posts: 45681
Joined: Wed Nov 27, 2002 10:13 am

Post by bogged »

gq351 wrote:
bogged wrote:
gq351 wrote:just drop a big v8 in it :D power problem solved!!
just not a 351 eh ;)
haha well the 351 went good while it lasted, but i think ill stick to the chev from now lol :D
:lol: :lol:
happier now with it? performance against each other, how do ya find it
Posts: 227
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Location: vic

Post by gq351 »

yeah im happy now :lol: the big block gets about 100 klms more to a tank & a shit load more power & torque!! ive forgoten where 1st gear is!!& most important it hasnt missed a beat... fingers crossed lol :D
GQ patrol '454' Big Block Chevy 7''lift 37'' muddies & heaps more...
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Joined: Tue Mar 11, 2008 10:41 pm
Location: Brisvegas

Post by SilverBulletBM »

A mate put gas injection on his, the team green kit i think. It has exhaust and snorkel as well. It drives nice, had pretty decent acceleration, walks over 4.2t cruisers in the bush. From memory it was dyno'd about 110kw, not 100% tho.
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Location: Sunshine Coast

Post by jim81 »

Question for GQ351. What gearbox did you use for the v8 conversion. I am considering replacing my RD28 when it dies for a v8 but unsure if the standard box is upto the task? As for more power from the RD28 I have fitted a 3"exhaust, increased the fuel delivery from the injector pump, fitted an intercooler (yet to plumb in but give it time) and I am also running ELF Turbo diesel 5/40 semi synthetic oil. All these have increased the power and I am now getting an average of 11.3lt per 100k out of the old girl even with 365k on the clock.[/quote]
Posts: 227
Joined: Sat Dec 01, 2007 11:56 pm
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Post by gq351 »

hey jim81.. im running the standard tb42 5 speed & has been fine so far, just done 2 rear centres & a cv over 2years, but im thinking of puting an auto in it soon??
the 5 speeds seem fairly strong coz im fairly hard on it...
GQ patrol '454' Big Block Chevy 7''lift 37'' muddies & heaps more...
Posts: 195
Joined: Sun Apr 20, 2008 10:10 pm
Location: sunshine coast

Post by patrol28 »

eduardo wrote:Gday

r, 6th cilinder cooling and bipass the cab heater, ..

GdLuck
who can do this for me im pretty happy with my rd28t gq have done a fair bit of work and this looks like something i should do
https://www.suspensionstuff.com.au/shop/product_info.php?cPath=137_40_69&products_id=996
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