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Vg30 Turbo On Rb20?

vagynamite

By vagynamite,
in Engines & Forced Induction

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vagynamite Apprentice

vagynamite

Posted
Posted

hey im looking at getting this:http://www.ebay.com/itm/88-NISSAN-Z-300ZX-VG30ET-SOHC-OEM-TURBO-TURBOCHARGER-/290887740617?pt=Motors_Car_Truck_Parts_Accessories&hash=item43ba42acc9&vxp=mtr

what else would i need to install this turbo? has anyone done it before and got any tips?
any help is appreciated.

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https://www.sau.com.au/forums/topic/427642-vg30-turbo-on-rb20/
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GTSBoy Grand Master

GTSBoy

Posted
Posted

Don't do it. That would be shitter than shit. If you want a VG turbo, you want the single turbo from the VG30DET. That is basically the same turbo as the the RB turbos, with an OP6 exhaust housing. A sensible upgrade option on an RB20 that has been done 10^55 times before and the specific tricks (not that there are many) would be found with a few seconds of googling.

eightsixboy Mentor

eightsixboy

Posted
Posted

VG30 on a 20 is crap, dont do it. I did the swap on my hr31 and it was really laggy, to the point that normal daily driving was a pain in the ass. I changed back to the stock turbo I hated it so much.

Go a highflow of the stock turbo, much better option, not alot of lag but alot of potential, my 32 had this and it made about 230rwkw and less lag then the vg did (tune would also help with that)

Dont put a op6 rear housed turbo on a 20, worst thing you could do in terms of drivability, would only be good if you used it for a highflow and wanted 250rwkw +.

Really any turbo bigger then stock is gonna suck unless you get a tune.

StevenCJR31 Veteran

StevenCJR31

Posted
Posted

Define "recondition" though. These things are BB centre and ceramic turbine. Recondition usually means highflow which really just ends up meaning keep the front and rear housing and get all new the rest.

not sure what actually done to fix it but it was smoking worse than a ten pack a day cancer candidate , after it was reconned it was all good- no smoke

didnt know the VG30DET turbos were BB but knew about the ceramic part of it

discopotato03 Grand Master

discopotato03

Posted
Posted

Yep the right ones from the Z32 300ZX quad cam single turbo cars are BB . Really the only usefull thing on them is that OP6 sized turbine housing and it's arguably too big for an RB20DET .

So , many people just fit an RB25 turbo because they are common and generally cheap . Compared to a std 20s turbo the 25s one has a very slightly larger turbine housing and the same sized turbine . The compressor wheel is larger as is the compressor housing and it also has a kind of anti reversion groove machined into its snout .

Your call but I think an RB25s turbo is a better suited to an RB20 and they are much easier to find . Do a few searches and see what others thought about 3L turbos on 2L engines .

A .

GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

I quite liked driving around an R32 with a VG30 OP6 turbo. Wasn't as laggy as the horror stories make out, and gave much more power at 12psi than the RB20 turbo had done at nearly 15. And this is coming from me, who whilst I appreciate that the RB20 is actually a good motor, used to absolutely hate the torqueless characteristic they have until they come on boost.

I must agree however, that if just looking for a mild upgrade, the RB25 21U is a better choice.

Edited by GTSBoy
StevenCJR31 Veteran

StevenCJR31

Posted
Posted (edited)

Yep the right ones from the Z32 300ZX quad cam single turbo cars are BB . Really the only usefull thing on them is that OP6 sized turbine housing and it's arguably too big for an RB20DET .

So , many people just fit an RB25 turbo because they are common and generally cheap . Compared to a std 20s turbo the 25s one has a very slightly larger turbine housing and the same sized turbine . The compressor wheel is larger as is the compressor housing and it also has a kind of anti reversion groove machined into its snout .

Your call but I think an RB25s turbo is a better suited to an RB20 and they are much easier to find . Do a few searches and see what others thought about 3L turbos on 2L engines .

A .

i think youll find the z32 was twin turbo or non turbo not single turbo

Edited by StevenCJR31
discopotato03 Grand Master

discopotato03

Posted
Posted (edited)

No thats not true , there were single turbo versions of the SOHC (per bank) VG30"ET" and DOHC VG30"DET" . The one most people know about is the VG30 "DETT" Which had twin inlet manifolds and forward facing TBs . And a hybrid T2/T25 turbo on each exhaust manifold .

The single turbo ET and DET versions had a crossover pipe behind the heads to feed one turbo from two exhaust manifolds . The ET or Z31 (SOHC) version from memory had a plain bearing ceramic turbo with a smaller center section and no preload bolt head visible on the side .

Have a look at the last couple of pics in this link and note the "Ceramic Turbo" badge .

http://www.geocities.jp/ayanami31rei/Z31-report/656-ayanami300ZR/656-ayanami-with-vg30det.htm

Cheers A .

Edited by discopotato03
StevenCJR31 Veteran

StevenCJR31

Posted
Posted

yep; there is confusion but it aint coming from me,as i said to disco before the z32 300zx didnt didnt come out with single turbo , it came out with TT or no turbo (VG30DETT or VG30DE)

the vg30det came out in the y31 cima and other luxury japanese cars

it had twin TBs on the passengers side of the engine and has the single(ceramic) turbo which i wilbe putting on my rb30det

mungy Experienced

mungy

Posted
Posted

I have a VG30DET turbo sitting in one of my R32's at the yard, from memory the 32 was great with it on, i see no issue in using the op6 or 30DET turbo on a 20 as you can put more boost through em than a 20 turbo anyway.

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