RB20DETT TwinTurbo2Litre

[Josh]

disco - he was saying his dad works for an engineering firm or some such similiar so he doesn't have to pay for it, price not an issue...

also - I'm just curious, but what CT12's?? how would they go..

[RB20DET_Silvia]

A guy we know on the Coast hat a RB20DETT and it bascially went like a bag of crap.....it looks to be a waste of money if u dont upgrade the engine example.....stroker kit at least.....or rb30 bottem end.

The simple fact was....in this case.....the this car im talking about went like a bucket of crap...i hope urs works out better.

It came from japan with the twin turbo setup. so it was all done good!

- Luke

[5hift]

hmmm...not parallel turbo setup ..but sequential. The guy on the coast with TT setup. Which two turbos were being used? Like I've been saying, im in Jamaica.... RB30 are NOT a dime a dozen around here . YES I know that its not the best bang for buck and NO I'm not trying to fool ppl into thinking i have a GTR . I just wanted a different approach on the tuning methods....so CT12s....ae these Turbo starlet turbo...how about that for use.

If used in combination with the Tomei 2.4L stroker kit, what then?

Does anyone have any experience with this setup? Meggala..where are you?

edit: hey...where's my medal for the almost 3 yr old thread resurrection <_<

Edited January 5, 2006 by 5hift

[Josh]

I don't know what kind of power they can handle, the 1GGTE's aren't that great an engine so I don't think people have done loads to them - all I know is they work on a 2L.. maybe CT12A's from a 1JZ - they handle 280hp stock so they musn't be too bad.. But then again if you are going to increase the capacity of the engine you might as well use GTR turbos...

[ebola]

I don't know what kind of power they can handle, the 1GGTE's aren't that great an engine so I don't think people have done loads to them - all I know is they work on a 2L.. maybe CT12A's from a 1JZ - they handle 280hp stock so they musn't be too bad.. But then again if you are going to increase the capacity of the engine you might as well use GTR turbos...

<{POST_SNAPBACK}>

Something like this.

While rb30's may be rare in jamacia, freighting a turbo (or two) is probably a good option.

rb26 twin turbos will (according to my understanding) spool faster than an rb25 turbo AND push more air.

and they have a combined capacity of 2.6L, not 4.0L.

Unless you can figure out how to get more air in at lower rpm (I vote suprecharger - but then 3 induction aides...?)

I guess at the end of the day you would want something close to 3L worth of (two) turbo(s) (according to the factory) that will still bolt on.

Well, thats my uneducated opinion. good luck with the venture. Since you have the gear, I think you should just stick them on.

But if you wind up the boost, you will probably run lean.

good luck

[discopotato03]

Josh what I mean is for the same effort a better and simpler solution may be had .

I'm not against people trying things that may not have been done before but for me the end result needs to be good to justify the effort .

For me the drama with RB20's is that good torque is difficult to achieve without a peakier power curve than I want . I reckon the cheapest RB to buy is an RB30 SOHC and the ET exhaust manifold is (should be) easy to get . For power and torque on a budget a second series NA RB30 is hard to beat - depending on the expectations .

Turbos - could be an expensive suck it and see debacle . If I could find them the G11 Charade could be worth a look . Otherwise maybe Garrett T2's or small T25's . Garrett T28's off a GTR with smaller trim compressors may bring it on in similar fashion to a GTR . These use exhaust housings of compact dimensions because this set up is rather crowded on an RB26 . If you can use these housings and dump pipes it would save lots of time over custom fabrications .

Twins will have a weight penalty over a reasonably sized single .

Gotta go , cheers from Goulburn A .

[5hift]

Respec guys...I'll be sure to let you know if i pursue this buildup. Now im going to go find out if 26 Manifold will fit the RB20

[Josh]

Josh what I mean is for the same effort a better and simpler solution may be had .

I'm not against people trying things that may not have been done before but for me the end result needs to be good to justify the effort .

<{POST_SNAPBACK}>

Yeh thats what I was thinking - If worthwhile gains to be had were there, then yeah go for it - definately.

[BHDave]

Respec guys...I'll be sure to let you know if i pursue this buildup. Now im going to go find out if 26 Manifold will fit the RB20

<{POST_SNAPBACK}>

Unfortunately it doesn't. the bolt pattern is different.

[Josh]

I was gunna suggest maybe some kind of adaptor plate - but then realised that someone else probably has already thought of that and then I also realised the problems with trying to get it to fit..

[discopotato03]

This may sound silly but is there enough meat in the head casting to drill and tap alternative stud holes ? I'd really like to know this myself because RB20/25 HKS cast low mount manifolds are easy to get compared to the rare RB26 version and I want to use the 26 head . Long shot I know but sometimes these things work .

Cheers A .

[Bl4cK32]

Rips (Rotorua Import Pro Shop) on this forum (and SDU) makes an adaptor plate which lets you bolt up the rb26 stuff to rb25 heads

edit/ he may also make a adaptor for fitting rb25 to rb26. Find his email and ask him

Edited January 6, 2006 by Bl4cK32

[discopotato03]

Tried searching no good , anyone ?

Cheers A .

[Bl4cK32]

here ya go disco:

Rob at RIPS -> [email protected]

[Jago]

Hi guys, After blowing a turbo gasket, I’m in the process of fitting 2 stock RB20 turbos to my Nissan Syline R32 GTSt. All the work is been done at a engineering firm in Bunbury WA where my dad works.

We are making 2 separate manifolds one for each turbo. Front 3 exhaust outlets to one and the back 3 to the other turbo. There is going to be a balance pipe that goes between both manifolds to equalise pressure into both turbos. We see there is no need to have 2 wastegates so one will be blocked off. All water and oil lines are been ‘T’ . There will be 3” pipes coming off the back of the turbos converging into a 4” exhaust system. Air intake for the turbos will consist on the 1 pod filter, splitting into 2 pipes after the afm then to the turbos. The outlets for the turbos will converge into one tube entering the front mount intercooler then engine.

This project is well underway, and if all goes well will be completed in a month. Before starting this project I had 200bhp running a stock turbo with 13psi, with the intercooler and a 3” exhaust. I have had it down the drag strip with a time of 13.7 @ 167km/h.

I was interested if any one had any comments on how laggy it will be, the power output I might achieve, or any concerns about what im doing. All comments will be appreciated. thanks, Ewan.

<{POST_SNAPBACK}>

I'm running an RB20DETT setup at the moment using twin T28 turbos.

Lag, well, very considerable. At 9psi, i was hitting full boost at around 4500-5000rpm, now im running 13psi boost and making peak power at 7000rpm...

i GUARANTEE you you will NOT make 280rwkw without some serious headwork and bottom end work, not on an RB20 anyway.

As for manifolds, im using RB26 ones, just using a custom fabricated adaptor/spacer plate blah blah blah, allot of custom stuff

[Roy]

What else have you got done to your car??? I would have thought that if a std RB20DET running the factory turbo can make 160odd rwkws at 14psi, and with a std R33 turbo they can make approx 180rwkws at 14psi...

That with 13psi out of a twin T28 setup you should be making considerably more power then what you are making. What injectors/fuel pump are you running, exhaust, intercooler, cat...i recall reading you are running a Microtech...what did the tuner say was limiting the power???

[Jago]

i have a big FMIC, 700hp fuel pump, GTR injectors, custom piping, custom exhaust with split dumps off each turbo, running into a 3" system, through a 3" hi flow cat, adjustable fuel pressure reg, microtech LT8 with handset.

i think he said boost, if i wanted 200rwkw he said u'd need much more boost *shrugs*, lol. At the moment i can't really afford another re-tune so im stuck.

[Josh]

Any close up pics?

[Jago]

of what?

i might have one or two lying around and will post them if i find em, if not i suppose i could take some

[Josh]

the turbz I imagine tho if you are using GTR manifolds it would basically look the same as that anyway...