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Vg30 Turbo Onto A Rb20

Curmi

By Curmi,
in Engines & Forced Induction

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Curmi Grand Master

Curmi

Posted
Posted

hi there guys i have just purchased a vg30 turbo for my rb20...

and have a couple questions to ask.

1. the turbo didnt come with an elbow so will my stock rb20 turbo elbow fit the vg30 turbo and cooler piping. if not what elbow will i need to buy?

2. is it a straight swap over with the turbos?

3. how much power have you guys got from the same setup?

4. how much psi is safe to run?

5. whats any good tips you can give me befor i put this turbo in?

cheers guys any information you can give me will be greatly apreciated.

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https://www.sau.com.au/forums/topic/247763-vg30-turbo-onto-a-rb20/
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NZM.031 Grand Master

NZM.031

Posted
Posted

there is a thread on here if you search that gives a step by step guide i think.. maybe thats rb25 turbo.

im also doing going to be doing this with a stock vg30 turbo on my rb20... on my previous 33 i put a hi flowed vg30 turbo on and ran it at 17psi.. all i can say is it went!!

i had bend one of the lines around... cant remember if it was water or oil.. just did it very gently with pliers wrapped and taped up so as not to damage it. worked fine.

as far as bolting the turbo up, it is all the same.. just not sure of the turbo outlet like you say.

cheers

Linton

SECURITY Grand Master

SECURITY

Posted
Posted
hi there guys i have just purchased a vg30 turbo for my rb20...

and have a couple questions to ask.

1. the turbo didnt come with an elbow so will my stock rb20 turbo elbow fit the vg30 turbo and cooler piping. if not what elbow will i need to buy?

2. is it a straight swap over with the turbos?

3. how much power have you guys got from the same setup?

4. how much psi is safe to run?

5. whats any good tips you can give me befor i put this turbo in?

cheers guys any information you can give me will be greatly apreciated.

1. depends what compressor its running, try yours and if all else fails just find a wrecker. unfortunately turbo elbows are hard to find.

2. not a strange swap over - its the preferred option if the turbo is hi-flowed, i personally wouldnt bother if it was standard.

3. not sure if anyone has gone the standard swap over.

4. same as any other stock turbo - around 10-12psi

5. get it hiflowed or at least rebuilt. the turbo is older than your entire car dude!

Curmi Grand Master

Curmi

Posted
  • Author
Posted (edited)

ok thanks guys for your input guys keep them coming

thanks rb30-power for that so i need a rb25 elbow now arhhh

and i dont want a laggy turbo and looks like this is

Edited by R32 DRFT4
FordyR31 Mentor

FordyR31

Posted
Posted (edited)

There r a couple of types of VG30 turbo rnt there? A smaller one from the TT setup and the older larger one. I know heaps of ppl who have run these turbo's on Rb20's and loved them. Think they bolted up to exhaust and cooler piping no probs, in ur case ur going to need the turbo elbow obviously. A hi flowed VG30 can be a prick on a street driven RB20 having no torque until boost. Makes Roundabouts interesting when ur trying to pull out.

180rwkw is no probs at 1bar and a quick SAFC tune and thats on an HR31 redtop ECCS with exhaust FMIC and pod.

Wack it on. 1 bar boost and get it tuned nicely and u'll love it. Great cheap upgrade for the 20.

BTW silvertop and RB25 oil and water lines should be fine.

Edited by FordyR31
RB30-POWER Mentor

RB30-POWER

Posted
Posted

VG30 turbo come in three basic flavours.

VG30DETT/Z32 300ZX Engine DOHC,

T28 flange small turbo used in twin form, will not fit and is no good, too small.

VG30DET/Nissan Leopard/Cima/Cedric Engine DOHC,

T3 flange, ceramic turbine wheel, ballbearing, same as series 1 RB25DET turbo but larger turbine housing (OP6 same as RB25DET NEO)

This is the straight bolt up turbo to other twin cam RB engines that you are after. Get it hiflowed with big steel wheels for bigger power and reliability. The bigger turbine housing means less back pressure so more power potential then an rb25 turbo, also slightly more lag, but not that noticable with standard ball bearing core. These turbo's run up to 9-11PSI as standard from factory FYI.

VG30ET/Z31 300ZX Engine SOHC,

T3 flange, will bolt up, but requires custom dump pipe, not worth the hassle to fit this turbo - to old school, it has steel wheels front and back, thrust bearing turbo, not suited to RB twim cam engines as a bolt up proposition. This is the same as the RB30ET turbo, but has different dump pipe orientation.

Curmi Grand Master

Curmi

Posted
  • Author
Posted
VG30DET/Nissan Leopard/Cima/Cedric Engine DOHC,

T3 flange, ceramic turbine wheel, ballbearing, same as series 1 RB25DET turbo but larger turbine housing (OP6 same as RB25DET NEO)

This is the straight bolt up turbo to other twin cam RB engines that you are after. Get it hiflowed with big steel wheels for bigger power and reliability. The bigger turbine housing means less back pressure so more power potential then an rb25 turbo, also slightly more lag, but not that noticable with standard ball bearing core. These turbo's run up to 9-11PSI as standard from factory FYI.

i have that one....so this will be good for the rb20 i have heard good stories and bad...

will i have to buy new water and oil lines for it also or will my rb20 turbo lines match up...

super_s13 Community Regular

super_s13

Posted
Posted

i had one on my silvia with a rb20 in it. I ran a 13.6 with low boost of only 10psi made around the 170rwkw makr pretty stock. They are great and no lag at all. I had full bost around 2800-3000 pretty close to stock. There cheap and easily accesible and if you wanna high flow later they also give great results.

RB30-POWER Mentor

RB30-POWER

Posted
Posted

i checked the rb20 turbo and 25 turbo i have in the shed.

the rb20 turbo has smaller banjo fittings for the water lines, so you may need to use rb25 water lines.

there was talk about the later rb20 turbo being slightly different and having same size water lines, but i really can't confirm that one way or the other.

Curmi Grand Master

Curmi

Posted
  • Author
Posted
If you're 32's a 89' model good chance you got the smaller banjo bolts like me.

smaller then the other 32's and all 33's

Check it out,cause it can be annoying.

mine is a 1992 r32. so mine will fit? thanks for the info

Pal Veteran

Pal

Posted
Posted

so can you bolt a vg30 exhaust housing onto a standard rb25 turbo. does it have a bigger waste gate hole? have a high flowed rb25 bb turbo and getting boost creep (set at 12 psi and going to 17 at 7000rpm) may be able to control boost better with this exhaust housing. have opened up waste gate hole on the turbo from 24mm to 28mm, but still not big enough!

super_s13 Community Regular

super_s13

Posted
Posted

My rb25det is meant to have a neo turbo on it. Can anyone give some insight as to boost i can run etc. Not sure and i know a bit bout turbos but nothing on these bad boys. Came already on the car.

Well that is what the guy saids on it. Does anyone know the numbers for it so i could check

RB30-POWER Mentor

RB30-POWER

Posted
Posted

"OP6" is stamped/embossed on the turbine housing, but might be hard to see whilst it's on the car however.

boost is the same as stock turbo really, you should just make more power for the same boost pressure due to the less restrictive housing.

i say max of 14psi on the street, and max of around 10psi for track days if you want it to last.

turboedsloth Grand Master

turboedsloth

Posted
Posted

i had one of these on my rb20 and it was absolutely awesome, sounded like an animal with a straight 3" exhaust. i ran 14psi thru it for a whole year before it let go. when i bolted the standard turbo back on to get home i had to slightly bend my water lines and the oil return was slightly different

  • 3 weeks later...
niran Proficient

niran

Posted
Posted

hey mate how are you going?

its a good turbo set up and it pull's hard, i have a r32 gtst 1992 s2 and i had to change my bango bolts to bigger ones that fit the turbo.

i did this a couple of month ago on my car, i wrote a DIY

heres the link:

http://www.skylinesaustralia.com/forums/Fu...tml&hl=vg30

if you need any help or info let us know mate

niran

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