Outer Limits 4x4 Board

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

take it out, and put in an RB25DET

tj81 wrote:take it out, and put in an RB25DET

what is needed to do that?

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.

is there any other way, eg. bigger turbo? tuning?

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.

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.

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

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.

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.

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.

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

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

sell your chip to me then!

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...

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..

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?

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.

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??

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

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...

just drop a big v8 in it power problem solved!!

gq351 wrote:just drop a big v8 in it power problem solved!!

just not a 351 eh

bogged wrote:

gq351 wrote:just drop a big v8 in it 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

gq351 wrote:

bogged wrote:

gq351 wrote:just drop a big v8 in it 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

happier now with it? performance against each other, how do ya find it

yeah im happy now 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

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.

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]

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...

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