Mazda RX7 turbo on a R33, suggestions plz.

[RNS11Z]

Hey guys. I might be installing a Mazda turbo off a series 4 rx7 13B onto a R33 skyline. Has any done this before and what sort of power gains would i be looking at with a front mount, custom manifold, 3inch turbo back exhaust and dual stage boost controller. Any info would be much appreciated.

[EnricoPalazzo]

ITs a good turbo, i think similare to a T04 but it wont mathc up to the stock mounts. Perhaps not worth it as they can only produce around 230rwkws

[JimX]

Turbogtst (fellow forum user) had an RX7 turbo on his GTS-t, which I think was good for around 250rwkw. I think his was a series 5 turbo though. As far as I know he still has it for sale, pm him if anyone's interested. I was going to buy it myself when I thought my turbo was b0rked, but I only had a faulty wastegate which I got fixed.

From what I could see on it, you will probably have to slightly re-route the oil and water lines, but other than that it seems to be a pretty easy fitment.

[RNS11Z]

Well the reason why i dont want to go for the series 5 is because it is substantially bigger then the series 4 turbo. Also the turbo will be going on a Auto R33 gtst.

[dkonig]

They are cheap, but I have heard reports that the exhaust housing is too big for the compressor, ie, more lag than is necessary for the power they make

[EnricoPalazzo]

Also the turbo suffers hugely from boost creep. the wastgate needs to be machined to fix this.

[WLD747]

has anyone done this as my friend is interested in purchasing a rx7 series 5 turbo for his r33.

[BHDave]

the s5 turbo is much better than the s4 and not any laggier due to better design.

The wastegate is bigger (i think it has twin outlets) so it doesn't creep. It has a proper split pulse exhaust housing design (like a t04) where as the s4 turbo is designed with an uneven split as it was designed to have a flap cover the smaller port at low revs to spool up the turbo faster.

But that said, it's designed for a rotary which flows a shit load of air for the power produced so it'll be laggy compared to a highflow or matched turbo.

[Cameron_Datto]

The best Rx7 turbo upgrade is to Use the Rx7 Core and turbine wheel .. machine out a single turbo VG30 Nissan exhaust Housing to Fit the RX7 core and turbine wheel .. Hi flow the front compressor wheel of the RX7 turbo with a TO4 e trim wheel .. .. I just finnished making one up .. every thing fits together really well .. and the turbo bolts back in the std place on the exhaust manifold ...

[WLD747]

sounds really good. I will let my friend know. Thanks for the advise.

The best Rx7 turbo upgrade is to   Use the Rx7 Core and turbine wheel .. machine out a single turbo VG30 Nissan  exhaust Housing to Fit the RX7 core and turbine wheel .. Hi flow the front compressor wheel of the RX7 turbo with a TO4 e trim wheel .. .. I just finnished  making one up .. every thing fits together really well .. and the turbo bolts back in the std place on the exhaust manifold ...