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VG30 installation onto RB20 help

Cool Hand Luke
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Cool Hand Luke Community Regular

Cool Hand Luke

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Im going to go and buy a fairly low KM single turbo VG30 turbo on monday for $450 (to put on my rb20). What mods need to be done, at the moment i have a turbo back exhaust with a seperate dump, will i need to get a new dump pipe made up? Thats my biggest concern. Also does this turbo have a ceramic or steel exhaust wheel? And what else do i need to do to fit it on? What is the max boost i can run with it?

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https://www.sau.com.au/forums/topic/19816-vg30-installation-onto-rb20-help/
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lowlux Proficient

lowlux

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Posted

u have to find out yourself if its got ceramic wheels or not,cause theres both in the vg30turbo range, Max boost id say around the 16psi mark with some good tuning and a fmic, but i rekon the turbo could take a little extra 2-3psi for short little bursts. And yes if u dont get the dump pipe with the turbo then you will have to get a dump pipe and your front pipe changed to suit, but if u get the dump with it,any exaust shop will be able to cut and shut a new flange to suit the new vg30 dump pipe. Also u might have to get some Bundi pipe and some fittings from a Hose/Hydraulic store :) hope that helps

Cubes Grand Master

Cubes

Posted
Posted

The VG30 with good tuning should be ok for up to 1.2bar.

I think they all have ceramic exhaust wheels unless you go for a really old school VG30ET turbo.

I had a VG30DET turbo that was ball bearing and ceramic. It was definately a lot less responsive than the standard turbo and made full boost around 4000rpm.

I wasn't happy with it as it felt slower than the standard RB20DET turbo running 16psi so I pulled it back off.

Sure it rev'd a bit better up over 6000rpm but getting there was a bit slower.

It also felt like I really had to give it heaps of shit just to hit boost in first gear, so basically expect to have almost no boost in first.

  • 5 months later...
Cubes Grand Master

Cubes

Posted
Posted

Stick with the RB25 turbo on the RB25. The VG turbo isn't as good as the RB25 turbo. The VG has a smaller compressor so it is a step backwards.

TO be honest I would buy a RB20 turbo over a vg30 for the street. The VG is to laggy.

T0nyGTSt Grand Master

T0nyGTSt

Posted
Posted
Stick with the RB25 turbo on the RB25. The VG turbo isn't as good as the RB25 turbo. The VG has a smaller compressor so it is a step backwards.

TO be honest I would buy a RB20 turbo over a vg30 for the street. The VG is to laggy.

That's good to know.

I wanted to stick a VG30 on my RB25 but it seems I can only get the roller bearing models.

May as well stick with the RB25 if it's laggier.

T.

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