3G To Spend To Make 225Kw On Rb20

[51NNA]

hi all, i recently put a rod threw the block of my 32 ive bought another rb20 and striped it down to replace the bearings and get the bottom end balance, im wanting to make around 225kw current mods are

fmic

25 turbo

electonic boost controler

3inch dump and full 3inch zorst

ive got 3grand to play with, id be happy to make 300hp with that cash, could u list the upgrades ile need please,

thanks =)

[Nee-san]

Nistune + z32 AFM

injectors and fuel pump + boost.

Should get you close.

[51NNA]

keep the 25 turbo on it or upgrade?

[Nee-san]

The best bet dude would be to check the Rb20 dyno result thread at the top of this forced induction section.

in there all you need to do is go through the results, find the guys that have around the power that you want and see what they did/what mods they needed.

Probably the best way to get an idea.

[51NNA]

yea i did go threw about 12 pages of it but its so mixed its hard too tell, some ppl are making 220kw with stock everything and more boost and some are only making the same with a forged engine 600cc injectors, computer, 044 pump, ect i was making 190kw with my mods already till it poped but that was due to me turning the skyline into a boat... long story haha..

thanks for the help though bro

Edited April 16, 2011 by 51NNA

[Nee-san]

ask Roy on this forum, he is the king of RB20 knowledge.

[The Mafia]

As crazy as this sounds mate, what about this:

RB30 NA Block, Crank, rods and Pistons (Basically a running short block motor) - $50

New standard Size Hastings Rings - $120

New Standard Sized King Bearings all round - $140

Acid Bath, Hone, Deck Block - $300

Crank Collar and Fitting - $200

Head Gaskt ARP - with Fire Rings - $45

Cometic 3 layer Steel Exhaust Gasket (ebay) - $40

Tappet Cover Gaskets - $15

Front and Rear main seal $100

Cam Shaft Seals - $40

Loctite of Various sorts - $100

RB25 Head - $500

RB25 head recon - $600 (Deck, recut valves, Valve tip heights, weld VCT hole) ((I had 1 hour of porting done on the exhaust side, for $100. Made a huge difference)

Helicoils for Exhaust Side Studs $100

Autobarn Greddy Copy Chrome Intake Manifold - $350 (MUCH better than the ebay ones..!! Comes with all fittings and bolts)

Bolts of Various sorts - $50

RB20 ECU remap - $500

Total: $3250

I'd allocate $4,000 just in case.

How do I know? I did it the weeks between xmas 2010 and new year 2011. My car is running 100%. Had a few hicupps, but that was because I didn't get the head or block decked. Lucky for me, I only needed to get the head decked.

TIPS:

- You put it all together. Don't over pay some other flamin mongrel to do it. Surely you have a mate that is a mechanic. A real mate, not just some dude up the road you know of. Took me about 2 weeks to do a full assembly. Trust me, its not hard. Just make sure you find and engine that hasn't been trashed. Mine came from an old guy that crashed it. The VL had only done 140,000s and was like new. Still had hone marks. The hone I had done to it made it come up like new. Was about half a thou ovaled at the most.

- Use the standard NA pistons, and get CRC gasket stripper and spray the f**k out of them. The carbon will run off like water. Don't get this shit on your hands.

- GET THE HEAD RECONNED! You won't regret it. If you have a spare $100, get the exhaust ported. WIll do magic.

- Get a Standard RB25 exhaust manifold and port it! Don't go paying $5,000 to extrusion hone it. Get a die grinder, an old gasket, and port it. Clean the inside out. Lumps, thick areas, etc.

- Get GTR cams, or NA RB25 CAMs, and don't run VCT. Then you can do a cheap remap of your RB20 ECU, or get a Nistune Daughter board.

- Run the RB25 turbo and limit your revs to about 6,000. Trust me, you'll be smoking the tyres from 1200rpm all the way to 5,000rpm with that turbo.

- Save up for the next 6 months and get a GTX3076 turbo and enjoy 320rwkws with f**koads of torque.

There is your RB30 slapper that will take 300rwkw easier than a hooker being given 2 kgs of crack to give you a blow job.

Edited April 16, 2011 by The Mafia

[GTScotT]

Put the new RB20 in without rebuilding it.

Send your turbo to hypergear and tell him what sort of power you want, should cost about 1100 to do to whatever spec you want.

Get a Z32 for 300, get a nistune for 1200.

Get a fuel pump for 200

Get GTR injectors 2nd hand, no idea on the price but you should be safe.

You could even go for 250kw, shouldnt be a problem other than lag.

[Lonewolf1983]

As crazy as this sounds mate, what about this:

RB30 Block, Crank, rods and Pistons (Basically a running short block motor) - $50

New standard Size Hastings Rings - $120

New Standard Sized King Bearings all round - $140

Acid Bath, Hone, Deck Block - $300

Crank Collar and Fitting - $200

Head Gaskt ARP - with Fire Rings - $45

Cometic 3 layer Steel Exhaust Gasket (ebay) - $40

Tappet Cover Gaskets - $15

Front and Rear main seal $100

Cam Shaft Seals - $40

Loctite of Various sorts - $100

RB25 Head - $500

RB25 head recon - $600 (Deck, recut valves, Valve tip heights, weld VCT hole) ((I had 1 hour of porting done on the exhaust side, for $100. Made a huge difference)

Helicoils for Exhaust Side Studs $100

Autobarn Greddy Copy Chrome Intake Manifold - $350 (MUCH better than the ebay ones..!! Comes with all fittings and bolts)

Bolts of Various sorts - $50

Total: $2750

How do I know? I did it the weeks between xmas 2010 and new year 2011.

TIPS:

- You put it all together. Don't over pay some other flamin mongrel to do it. Surely you have a mate that is a mechanic. A real mate, not just some dude up the road you know of. Took me about 2 weeks to do a full assembly. Trust me, its not hard. Just make sure you find and engine that hasn't been trashed. Mine came from an old guy that crashed it. The VL had only done 140,000s and was like new. Still had hone marks. The hone I had done to it made it come up like new. Was about half a thou ovaled.

- GET THE HEAD RECONNED! You won't regret it.

- Get GTR cams, or NA RB25 CAMs, and don't run VCT. Then you can do a cheap remap of your RB20 ECU, or get a Nistune Daughter board.

- Run the RB25 turbo and limit your revs to about 6,000. Trust me, you'll be smoking the tyres from 1200rpm all the way to 5,000rpm with that turbo.

- Save up for the next 6 months and get a GTX3076 turbo and enjoy 320rwkws with f**koads of torque.

There is your RB30 slapper that will take 300rwkw easier than a hooker being given 2 kgs of crack to give you a blow job.

Thats all good, but what about the ancillary stuff?

AFM

Injectors

ECU

Tune

Fuel pump

etc

My recommendation:

Injectors

nistune

AFM

2nd hand turbo of some sort

Pushing it for $3k though

[The Mafia]

Thats all good, but what about the ancillary stuff?

AFM

Injectors

ECU

Tune

Fuel pump

I'd run these standard until there is more money available.

Or -

AFM - Get a Q45 somewhere for $50

Injectors - HiFlow them to 600cc for $250

ECU - Already said and costed remap the RB20 one

Fuel Pump - Bosch 044 - $250

[bubba]

The 30 is a great idea, I did mine in a weekend.

With ancillaries, you stick with whatever suits the head and the car. In Mafias case, R33 RB25DET head is the better choice. For the OP, an R32 RB25DE head is the go (what I used).

With an R32 RB25DE head, everything is the same as RB20, it all swaps across. There is some minor modding of power steering bracket and exhaust manifold, then massaging cooler pipes but it's nowhere near as scary as some people make it out to be. I literally drove in on a Friday arvo and drove out about 1am Monday morning.

With an RB25 turbo @ 12psi, it made ~250rwhp @ 4600rpm.. 3000rpm 2nd gear launches ftw It seriously makes a 32gtst even more fun than they normally are, IMO it's how they should have come out of the factory

[WHITER33GTS-T]

The 30 would be the bang for buck option and they are still cheap if looking at forged pistons and rods.

[battery]

lol at recommending an rb30 for 300hp and 3k.....

he will need an rb25 box and decent clutch too thats at least 2k...

wack the rb20 back in with nistune, hks 2530 and supporting mods.

[Cowboy1600]

lol at recommending an rb30 for 300hp and 3k.....

he will need an rb25 box and decent clutch too thats at least 2k...

wack the rb20 back in with nistune, hks 2530 and supporting mods.

LOL @ you for not thinking with your brain.

He won't need an 25 box if his 30 is only running say 200-250kw. Just becasue you have the ability to run over 300kw doesn't mean you have to.

Keep it sane until the money allows and upgrade bits one by one until you have the strenght to whick it up some more.

The 30 makes way more sense than reco'ing a 20..

[battery]

LOL @ you for not thinking with your brain.

Its not the power that kills them its the savage torque.... I killed 3 rb20 boxes behind a 160kw rb20...

It will work yes, but its not fair to say you can do an rb30 build for 3k when theres a very high chance of a gearbox failure.

I would never reco an rb20 just get a good second hand one.

[Lonewolf1983]

as mentioned, its the torque that will be the issue with the rb20 box/clutch, even at the same end power level.

Nistune alone is an extra $800-$1000 on top of your $3k RB30, so you've blown it by 25% right there.

[R3N3]

gtr injectors

walbro pump

z32 afm

hiflow internal gate turbo

nistune

electronic boost controller

im no expert, but by looking at the rb20 turbo upgrade thread, this seems to be a fairly cost effective way???

[51NNA]

thanks for that info mafia but before i bought the 20 i looked at the hybrid build and thought it would cost too much, i might look at doing it again but i just love the way a rb20 revs, cant beat the sound of it reving to 8500 lol, im an apprentice mechanic so the build would be covered, my gearbox is on its way out, second gear syncro is grinding, so a box replacement will be done anyways

[The Mafia]

thanks for that info mafia but before i bought the 20 i looked at the hybrid build and thought it would cost too much, i might look at doing it again but i just love the way a rb20 revs, cant beat the sound of it reving to 8500 lol, im an apprentice mechanic so the build would be covered, my gearbox is on its way out, second gear syncro is grinding, so a box replacement will be done anyways

Apparently $350 is all you need to full balance a RB30 setup... (WOuld be the same as a RB20)

Rev it to 8k

[51NNA]

or i could just buy a rb25 for 1500?