Wiring Specialties RB30DETT - Twin Turbo setup - a couple of pics

[Wiring Specialties]

I have had this engine running for about a year now, but never posted any details. I know there are a lot of ideas and questions about the RB30... I am pulling the engine out this week to clean it up and redo some lines.

I can tell you that the RB30 route was all worth it. Spool-up is very quick and power delivery is awesome. I like the twin setup better than the larger single turbo. Here are a few specs.

And, yes, this is an RB26 twin turbo kit on a RB25 head.

3.1 L Rb30Twin HKS GTRS 740cc Nismo injectorsAussie Rods and Wiseco Pistons AEMExedy twin plate clutch

Made 380WHP and 390 Tq at 9 lbs of boost Made 545 WHP and 550 tq at 20 lbs on 94 octane













Full boost under 4000 rpm.
Modified by bostonS15 at 12:36 PM 2/2/2010

[WhatsADSM]

Nice setup.

[SullivanRacing06]

very nice.. love the similar hp n tq numbers!!

which turbos r on the set up? n1? gt2530s?

[Cjmartz2k]

Very well thought out and executed. Did you just redrill a 26 ex mani?

[meet07]

Those hp and torque numbers are just dreamy!!! Only with a 3 liter bottom end i guess....

[Wiring Specialties]

Thanks guys. Yes, the engine runs very well. The clutch is tough, but I am working on it.

The turbos are GT-RS twins.I actually re-drilled the RB25 head for the RB26 manifolds. I really wanted to stick with cast iron reliability. I had a few manifolds crack on my SRs, till i went with a Fullrace custom unit. These came with the Turbo kit, so i am running stock manis and needed to re-drill the head. No problems and was done when the head was being worked on for the RB30 install.

Power - yes, its awesome. Very linear also.

ThanksYury
Modified by bostonS15 at 9:31 PM 2/2/2010

[flatrate]

what mods are done to the cylinder head? Still using VCT?

Very nice

[Wiring Specialties]

The head was worked a little. There is a known issue of teh RB heads holding on to the oil at higher RPMS, so we did a few things - drilled a drain in the back of the head- restricted oil feed into the head a little- cleaned up the valves and got new springs- VTC is working. We had to run and oil line to the solenoid

Also, the exhaust manifold mounting studs were drilled for the RB26 manis.

Most of the work is in the block.

I am pulling the engine out this week to redo a few things, so i will post a bunch of block pics soon.

ThanksYury
Modified by bostonS15 at 1:52 PM 2/3/2010

[flatrate]

so stock ports stock cams? If so good power!

[Wiring Specialties]

Just a little work on the ports and stock cams. I think a pair of aftermarket cams will get this thing to 600 whp at 20-21 lbs of boost.

I'll be honest, as is the car is tough to drive on the street. I have to figure something out for grip.

ThanksYury

[S14-NEO]

very nice numbers indeed, i will be seriously interested to see just what my RB30 build will produce with me using a NEO head...i will not however be using the twin turbo setup...im really partial to a nice size single turbo..with the extra displacement that an RB30 offers the bigger single turbo setup will still work out nicely.

[Wiring Specialties]

I think a single turbo is a great idea. Certainly makes things simpler. Keep in mind that with most RB25 manifolds and a turbo GT40R or larger, there will be hood clearance issues on the RB30.

I was able to get the HKS kit with all the greddy plumbing for $2200 shipped from Japan, so i could not pass it. It came with a Titanium downpipe that was 2 lbs for the twin turbo setup. Insane.

Good luck. Yury

[S14-NEO]

that is possible, but i am using the mckinney mount kit which had the engine sitting as low in the chassis as humanly possible...so i am pretty optomistic.

[Wiring Specialties]

What mani/turbo combo are you using?

Yury

[S14-NEO]

its a heavily modifed Ebizzle manifold....currently im running a T67/T3 turbo flange

[ST240]

May i ask what kind of mounting setup you used? The rb30 block is 1.5" taller than any other RB block correct?

[Wiring Specialties]

I used the Top Hat units, but switching to Syko... Syko are much better than anything out there, but you need a R33 cross member.

Yury

[LSDrift]

Any progress on this? I'd sure as hell like to see some videos!

[EJ8 944]

x2, vids would be sweet.

Do you have a dyno graph you could post up? it's always cool to see more tq then hp.

[Wiring Specialties]

We have been so busy with the pre-made harnesses, I have not had much chance to work on the car. Its moving along though and should be up and running for a re-tune next week.

No vids yet. Just cranking away in the garage at redoing a lot of the small things. All new plumbing and coolant piping. It was not done when we first put the engine in. Enjoy... and give some thoughts.















































ThanksYury Lyalkohttp://www.wiringspecialties.com
Modified by Wiring Specialties at 10:23 AM 4/7/2010

[LSDrift]

Very nice very nice! I would do bad things to have hp and tq numbers like that. Someday...

[ST240]

I like how you did your head drain. I was going to do it like the aussies and have it come from the back to a bung in the pan.

Did you have to mill a flat spot or what exactly did you do there?

I'm using a R32 RB25DE head.

EDIT: Ok so i looked at some other pics on the net and i feel like an idiot. It seems that flat spot is there stock? Or whats the deal, whats there stock?
Modified by ST240 at 1:01 PM 4/7/2010

[Wiring Specialties]

Yes, power delivery is awesome. Should be even better with the new tune. Overall, not too much power, compared to some supra setups with single turbo conversions, but for the 240 on the street , more than enough.

The rear head drain need a bit of milling to get the surface to flatten. Very easy for a machine shop to do.

here is the pic:

More questions, let me know.

ThanksYury Lyalkohttp://www.wiringspecialties.com

[meet07]

So you have a drain for the front and back of the head?? I wanna say there is a local guy on here that had head/cam issues b/c of the drain in the back alone?? Can you shine some light...

[Carl H]

front drain is the factory vtc drain on the r33, the rear drain is the addon bit.

[ST240]

front drain is the factory vtc drain on the r33, the rear drain is the addon bit.

Makes sense, hence why my R32 RB25DE head does not have it.

I'm a little hesitant to block the rear restrictor off and add another yet smaller one to the front oil feed as per the SAU recommendation with my rb26 pump. Seems like that head will barely be getting any oil by the time I'm done with it haha.

[vocationalzero]

If I had that set up, I would be playing with a compound turbo set up instead of twins.

[Wiring Specialties]

Makes sense, hence why my R32 RB25DE head does not have it.

I'm a little hesitant to block the rear restrictor off and add another yet smaller one to the front oil feed as per the SAU recommendation with my rb26 pump. Seems like that head will barely be getting any oil by the time I'm done with it haha.

ST240, I did not restrict the oil feed channels and left them untouched. I had the same concerns as you and having the lifters running dry at low oil pressures was a concern. So I simply added the rear oil drain as per the suggestion on SAU and installed the VVT solenoid.

Vocational - If you had the setup? Why don't you? It would be cool to see a compound setup done. I would have no idea where to start with sizing the turbos. Fab work would also be a challenge. But, it's all Ifs and Thens at this point, ey?

ThanksYury
Modified by Wiring Specialties at 9:19 PM 4/8/2010

[mott6904]

nice setup. What wiesco pistons did you use and what is the compression ratio? Im have no clue what piston to run in my rb30/26 build. When you say aussie rods is that the brand or are they just from Australia? Im getting ready to make some knock off spool oil drains on my lathe, we shall see how it turns out.

[Chaos the Xile]

Looks great! Awesome #'s
Modified by Chaos the Xile at 2:34 PM 4/11/2010