Installing a RB26 turbo on a CA??

[float_6969]

That was an adapter made by nissan for the skyline.

[IvoryJ30t]

does it come on the stock units?

[IvoryJ30t]

wow, i just realized how retarded my last question was...

perfect, i was wondering about that, now i know those garretts will fit perfectly.

[float_6969]

no, the rb26dett did not use sequentials. It used parallel turbos (just look at the manifold off one).They are .48 turbine, .60 compressor. They also may have changed over the years, I cannot say for sure. supposedly, R32 were steel, R33 were ceramic, and R34 were ball bearing (don't know what composition the blades were).It wouldn't be unbelievable that they would have changed A/R ratios over the years, although rated HP never changed.

The 2jzGTE and the 13B are the only sequential turbos that I can think of off the top of my head. Not many companies did this due to their complexity, weight, space, and lack of reliable technology. Don't believe me? check out those setups.. goddamn they weigh like 70-100 lbs and take up as much space as the engine!Most of the japanese twin turbo supercars used parallels, (I'm not an authority on this but I've always been interested in twin turbo technology, so please excuse any mistakes) like the subaru twin turbo (2 liter I believe) that came in the jdm legacy, skyline GTR, 300zx doesn't use parallel or sequential turbos at all, much like the 3000gt.

So I'm assuming that 3 cylnders ran to the turbine side of each turbo? Did the compressed air join together before the intercooler and then enter the intake mani? I had assumed the RB26 had a sequential setup due to the 2jzgte and 13b both being in the same class and having the same setup. I've seen the 13b and 2jzgte setup in the states, but have never seen the skyline setup. I do know that the 3000gt and VG30 setups both use what I call a "cross bank" setup. Both turbo's share an intake, they are fed from separate banks, have separate intercoolers, and then feed into the opposing bank's intake. A nice way to even things out. Unfortunatly it requires a lot of piping and space, which became the achelies heel of the Z32. Power output is limited due to the inability to place larger sized turbo's onto the motor. I personally feel that unless in a "V" application, mulitple turbo's are a waste of space and add weight.

[andrave]

I could use a set of those 2 bolt adaptors too, I was planning on cutting some from stock to make my adaptors.

[IvoryJ30t]

yeah, because in the skyline service manual it shows the two bolt flange to the hotpipe, and after seeing that, i realized the super cheap turbos i can get with the 3 bolt compressor output and two bolt input, is the same setup as stock so everything will piece together nicely.

those turbo's are most of the reason i want the rb26.

the same specs as GT2530's but half the price [HK$ is quite a ripoff...]

garrett ball bearing center T25's 320ps rating, internal wastegated [7 psi] brand new $800 each.

[float_6969]

So whats the difference between these and an S15 turbo? Just the A/R?

[IvoryJ30t]

i have to call them back, i dont remember the exact specs off the top of my head, they were good when they told me, i think its .58 or .60 on the exhaust side.

its the turbo used on the new mazdaspeed protege. [2.0l]

its a production turbo, garrett's pumping them out for mazda so there dirt cheap.

[IvoryJ30t]

tough to beat that price for a brand new ball bearing turbo.

[GotBoost4Yall]

t28s still use the t-25 compr/exh housings right or are they ported more for the wheels to fit? If the Skylines exh housing uses studs, why not just swap exhaust housings?

[float_6969]

The studs should just drill/hammer out. That would be easier than swapping turbine sections...

[andrave]

yes, easier to remove the studs from one then swap housings. The skyline turbo is technically a T25/T3 hybrid.

[float_6969]

So did we decide if the RB26 had ceramic blades? I got confused with all of that...

[IvoryJ30t]

from my research, the r32 uses steel compressor/ceramic exhaustthe r33 uses steel compressor/ceramic exhaustthe r34 uses nylon compressor/ball bearing center/ceramic exhaust

[float_6969]

I'll bet that R34 is hard to get ahold of, but man that would be a spooling dog!!!

[IvoryJ30t]

nevermind, it looks like the skyline uses a two bolt compressor output. gonna have to fab up the 3 bolt adaptors anyway...

[float_6969]

thats a jimmy kicker...

[IvoryJ30t]

yup. either that or make my own IC piping, which i didnt want to do either, because the rb26's stock piping is just so damn sexy.

oh well.

[andrave]

I'm making custom piping for mine, like I said I'm just gonna make 4 of those 2 bolt flanges for 2.25" pipe... thats what I'm using on my charge pipes and my inlet pipes.

[IvoryJ30t]

i gotta call my turbo place back now. i gotta figure it out. im trying to use as many stock parts as possible in an effort to keep the pricetag under 12k.

[IvoryJ30t]

i gotta get a downpipe gasket from that turbo as well to check the bolt pattern. if the exhaust-downpipe pattern is off also, ill just try to find used gt2530's over the next couple months.

i could just get the exhaust wheel replaced with a steel turbine, but i want it ball bearing and slightly bigger.

one thing im thinking, is if the exhaust outlet bolt pattern is the same, fitting the stock turbo's compressor housing on the ball bearing turbos.

see, when you think you have most of it figured you, more stuff pops up.

[Red Lightning]

If the RB26DETT turbo is a T25 hybrid, can it really support 320hp? Or is it two turbos can support 320hp?

[IvoryJ30t]

no, not the stockers. the one im talking about is ball bearing and bigger. that one makes 320 hp each.

the stock skyline turbos are limited by their ceramic exhaust wheels, i would say 220 hp max each before they blow the exhaust wheel.

[andrave]

supposedly 490 crank HP is the top limit for the stock RB26dett twins. Now, who decided this, I am not sure. From what I've read anything over 450 WHP would deinftely be pushing them, and is beyond their efficiency map anyway.

[Red Lightning]

yes, easier to remove the studs from one then swap housings. The skyline turbo is technically a T25/T3 hybrid.

That should support quiet a bit of power, considering the T28 supports 270whp or so. Can a R32 turbo (steel wheels) support 300whp? Or would it still tops out at 220hp?

[andrave]

they will support a lot of HP but you will be super heating the air since they would be way past their efficiency range, you would be talking about over 20 psi, and with a stock CA IC intake temperatures would be crazy high.And with those ceramic wheels its a time bomb with shaft speed and heat so high...and when it blows up, theres no guarantee that it might not damage other components with it.

[float_6969]

Dont cheap out on turbos people...

[andrave]

Hey guys, I have my GTR turbos in (R32) and they are in perfect shape, wheel spins so freely it freewheels if I flick it. No shaft play or rust, either.I just want everyone to know that they do not share the turbo output flange with other nissan turbos, so if you use one, you are going to need a different elbow/downpipe. In the meantime, if anyone knows where I can get a couple flanges to fit the GTR turbo I'm looking.

[IvoryJ30t]

try http://www.agpturbo.com and http://www.roadraceengineering.com