Rb30

[Blake]

Was interested to see if anyone has used an rb30 engine in a disco 1? Cheers

[Eevo]

the nissan turbo engine they put in VL commodores?

[rb30gtr]

Great idea! Haven't seen one in a Disco yet, but would certainly love to!
Go the 30 bottom end with a 25 or 26 head. Should be plenty of well built ones for sale,
Or just an Rb30 with the original head, SOHC, are dirt cheap from the wreckers.
I know a couple of Pootrol's that have just the rb25 in them.

Are you looking at doing a build or paying someone to convert it?

[Blake]

yeah im a qualified mechanic so I plan on doing my own conversion.
my work mate has the rb30det he built himself for his gq so ill get a few tips from him.
will most likely start of with the single cam turbo and go from there.

[jazzaD1]

great engine, but you might have some trouble registering it as the engine is older than the earliest discovery

axles and diffs might not last long either

it would be interesting to see though!

[justinc]

Great engine, VERY strong and VERY tunable :twisted::cool:

A gearing change to 4.10 diffs would be mandatory I reckon.

JC

[Davehoos]

I have a few here and thought about it for a defender swap.but a 3.8 VN/VS motor are beter value.my brother inlaw just bought a hilux with a super charged 3.8 for a farm ute.

the engines as long as a holden 6 but taller.the RB20-25 is a shorter block.but fuel economy is not very good.
Japanese LPG engine is RB20P

work out your ratio based on RB30 patrol.
these engines have LOW[no] grunt at low rpm.
you want lower than 4.1-some patrols run 4.8:1.

its gear box you need to work out.my conversion stopped because my disco are automatics.

skyline has oil pan at the front.
patrol and fairlady 200ZR[RB20DET] have rear oil pan.
patrol RB30 has stronger water pump casing and V belts.
and normal distributor.

I thought about RB20E or ET single cam.my import skyline RB20E makes maX power and tourque at 7500 RPM cut out.and it will do this for a long time.

the single cam RB30 can make more usable power than a DET until you go to turbos.

[justinc]

I have a few here and thought about it for a defender swap.but a 3.8 VN/VS motor are beter value.my brother inlaw just bought a hilux with a super charged 3.8 for a farm ute.

the engines as long as a holden 6 but taller.the RB20-25 is a shorter block.but fuel economy is not very good.
Japanese LPG engine is RB20P

work out your ratio based on RB30 patrol.
these engines have LOW[no] grunt at low rpm.
you want lower than 4.1-some patrols run 4.8:1.

its gear box you need to work out.my conversion stopped because my disco are automatics.

skyline has oil pan at the front.
patrol and fairlady 200ZR[RB20DET] have rear oil pan.
patrol RB30 has stronger water pump casing and V belts.
and normal distributor.

I thought about RB20E or ET single cam.my import skyline RB20E makes maX power and tourque at 7500 RPM cut out.and it will do this for a long time.

the single cam RB30 can make more usable power than a DET until you go to turbos.


Dave, I agree they are not a perfect match, but as a 6 cyl engine they are a really good unit. The Toyota 1 or 2 JZ are also giant killers, but gearing needs a good look in to make it a worthwhile conversion.

JC

[VM_Motori]

A very bias imput but $ for $ the 2JZ engine will EAT an RB engine hands down every day of the week.

ULTRA RELIABLE 700hp+ bottom end STOCK.

Piston squirters in the GTE variant to prevent detonation

Yamaha tuned Manifold's

Map not MAF (easy to boost performance)

ect ect all in stock trim.

I have 600+hp in my Supra (Stock Bottom end) and swear by the rumor mill on the build quality.

[Eevo]

A very bias imput but $ for $ the 2JZ engine will EAT an RB engine hands down every day of the week..
power wise yes.
i thought a 2jz was more expensive though?

[VM_Motori]

power wise yes.
i thought a 2jz was more expensive though?

You get what you pay for.

Also you get cheaper HP from a 2jz.

[justinc]

MMMmmmmmmmmmmmm 2JZ:cool::cool:

They really are an amazing engine.

2JZ 1530hp dyno - YouTube

:o:eek:

JC

[Vern]

If I had of kept any of my old HR's, they'd be sporting one of these buy now JC.:)

[VM_Motori]

7mGTE goes good to :) when new head bolts and gaskets are in.

Got one home to be either HR or XC Fairmont

Cheap compared to a 2jz

[Fausto79]

funny that coz my disco 1 and R31 skyline sleep next to each other in the garage

[jakeslouw]

What about a 1UZ 4.0 V8? 190kW and a flat torque delivery. Also a much shorter motor and you can go single or twin turbo if you get the urge?

Use either the Lexus front cut for the ECU and harness or just buy a Megasquirt ECU.

[Blake]

I thought about the 1uz but more interested in the rb30det due to the ease of power increase with the right size turbo and the right tune.
I'm guessing no one has done this conversion then?
Has anyone done rd28 engine conversion then?

[jakeslouw]

Has anyone done rd28 engine conversion then?

Common conversion in South Africa. Bell housing converter and clutch available from these guys:

Gilo Engineering Home Page (http://www.giloeng.com)

AFAIK, all the RD28 engines were built as "turbo ready": coated pistons and oil sprayers. So adding a custom tubular exhaust manifold with your Garrett NVT of choice and an IC might be an option............

[Davehoos]

I owned a RD28 auto r31 EX taxi and converted a pintara wagon to RD28 manual.[also a CD20].

fuel economy for the pintara was 13Km/l even towing a car on a trailer.
top speed for non turbo was 145km tops.I got a dead turbo engine from a GU--for next time I get around2it.

the early engine isn't turbo ready-but it would be OK in a car. that's why I bought a cracked head engine.Disco around car and half.japanese engines tend to be different specs in different parts of japan.exported RD28 like laurel in Europe will be turbo ready.

LD28/RD28 are very common in Europe.a few years ago people started to use these kits to fit RB and SR engines.

a SR20ET fitted to a skyline with tuning package is a common idea in japan--goes great but the fuel use.

[Davehoos]

the web site for the adaptor plate show LD28..
Australian companies make RB/RD to holden-chev-and various manual gear boxes.

RD are about the same size but lay over on opposite angle.lean toward the passenger side.starter is at 10.30 but is similar in teeth/dia.

the top bolts and dowl is at different height.2 lower bolts are the same.

[jakeslouw]

the web site for the adaptor plate show LD28..
Australian companies make RB/RD to holden-chev-and various manual gear boxes.

RD are about the same size but lay over on opposite angle.lean toward the passenger side.starter is at 10.30 but is similar in teeth/dia.

the top bolts and dowl is at different height.2 lower bolts are the same.

AFAIK the LD28 and RD28 are extremely close when it comes to the bellhousing pattern. Apparently 2 extra stud holes or something.

[steelo]

I had a 91 Patrol carby rb30, great little motor that went better with headers & if you kept the carby also get rid of the fuel warmer & modify the splash can at bottom of carby as it restricts fuel to the 2 rear cylinders.
They had them in VL taxi's with near on a million k's on them, but be warned that they need to rev, & rev hard to get the best out of them. Also they don't like to tow or tar road hills (carby ones that is) but if revs are up there they're not to bad, almost unkillable. Go onto the Patrol Forum & there is heaps & heaps about these motors & what can be done to them. :D

[Fausto79]

:) like i said...

[Muel]

has anybody considered or have completed an LS1, 2, L98, etc Chev Conversion? its been playing on my mind. All alloy, heaps of torque, plenty of parts and reasonably economical for its size (would be more economical than my 3.9

[Stacks]

Marks 4x4 has the adapters for ls1 to go into the disco, would be a much better choice than an old rb30 if your going through the effort.

[Eevo]

Marks 4x4 has the adapters for ls1 to go into the disco, would be a much better choice than an old rb30 if your going through the effort.

got a link?

when my 4.0 goes, i was thinking a 4.6 or a LS1

[Stacks]

http://www.marks4wd.com/bell-housing-adaptors/land-rover.html