Installing a RB26 turbo on a CA??

[CA19DET]

got a buddy trying to do this, anyone ever successfully did the swap, the reason i ask is cause the RB turbos have studs on the turbine, and the CA manifold has the bolts tapped into it aswell...

and the RB turbo is the same if not better than the SR turbo correct??

[float_6969]

You can't put an RB stock turbo on the stock CA manifold. The CA uses a T2x series manifold and the RB turbos are a T3 series. If he has the manifold that the RB turbo came off of, he could get it to work, but he'd have to cut up his current manifold and weld the other flange onto it. Kind of a lot of trouble. I'd probabally just have a new turbo manifold made. You can have a log-style whipped up pretty quickly and cheaply I would think.

[andrave]

Quote »You can't put an RB stock turbo on the stock CA manifold. The CA uses a T2x series manifold and the RB turbos are a T3 series[/quote]

whoops, slow down.The rb20 and rb25 both use nissan's variants of the T3, with a T3 manifold flange.

BUT, the rb26dett uses two T25/T3 hyrbids.They use a .48 (standard ca turbine) turbine side with a .60 compressor wheel (same as the later s14/s15 sr20det BB turbos).They do have the same T25 flange as the sr20/ca18 turbos.

Putting one on a ca18det should be as simple as clocking it and bolting it up.

Might have to do minor things, for instance I don't know if the stock turbo elbow, oil lines, etc will bolt up bit for bit but its close enough to not be a hassle.

Anyway about the studs, just take them out of either the manifold or turbo.problem solved.

as for whether or not its an upgrade, the only difference is that the compressor is a .60 compared to your stock ca18det .49. the turbine side is the same.so it can blow more air but the turbine is the same size.I don't know how well it would work.

[float_6969]

Thanks andrave, I for some reason, had it in my head he was using an RB25 tubo. What andrave stated was correct. If it was one of the units from an RB26, then it might work, but I personally don't feel it's really any better than an S14. Do you know which motor (exactly) it came off of?

[andrave]

yeah they did change significantly over the years, I believe R32's had steel wheels and the R33's switched to ceramic blades, which stock for stock was great since it spooled up faster. when you are using them other engines though, the older steel wheeled ones are a bit more durable than the ceramic ones. I also believe that in the R33 models they used a ball bearing center section, which we all know is pretty valuable.

[float_6969]

As far as I'm concerned for the money you could get a nice S14/S15 turbo and it would bolt right up. Otherwise I personally would have an equal length manifold and a GT series turbo.

[andrave]

yeah but you can get used GTR turbos for $150 bucks.

[sprfst240]

where do you find those turbos for 150. Ebay?

[CA19DET]

the RB26 is a T25 hybrid, it does have a T25 flange,

THE reason i posted is cause the RB T25 has the bolts fixed to the turbo, and our manifolds have the bolts fixed to the manifold, so one of them needs to bolts cut off for it to work,

i was wondering who has made it work, and how...

i am thinking he should cut the bolts off the manifold, drill them out, and bolt the sucker on, may need to flatten the back of the manifold flange the ge the nuts to sit right.. the turbo i dont think has room on the turbine side to drill the bolts out properly.

later

[andrave]

are they studs or welded in? they are probably just studs that he can back out using two nuts locked against each other. prolly be a ***** to get out.

I got two Rb26dett turbos for 300 bucks shipped from japan, and I lost an auction on ebay where a set went for 275 plus shipping...there are plenty around 500 for a pair, and I've seen a bunch of singles go on ebay for 200 or less.If you would like links I know a couple guys selling R33 GTR's for around 500 a pair as we speak.

[CA19DET]

do you know anyone selling a stock T25 or T28 and just ease his worries all together????

email me

[andrave]

http://www.nissaninfiniticlub....40648

I think nismo freak may still have his. If not I'll keep checking.

[IvoryJ30t]

too bad the ceramic turbines make them useless for high boost.

[IvoryJ30t]

and the R34 uses ball bearing center sections.

[andrave]

the ceramic turbines aren't worthless, just less than ideal. you can rebuild them with steel ones if you manage to shred yours (though they often ruin the housings when they go).

[float_6969]

That would be a helluva ride when when of those goes out.

[andrave]

unfortunately (fortunately for most of us) while the description of the damage sounds dramatic the actual failure is usually pretty mundane. The turbine breaks down and your car stops making boost.Wanna see some nice shots of damage to ceramic bladed turbines?http://web.ukonline.co.uk/soarertt/turbo.htm1jzgte ct12a twins got ****ed up here. These turbos aren't very durable though.

[IvoryJ30t]

not totally useless, just very prone to failure.

[float_6969]

I'll pass, thank you very much.

[r34 gtr]

ive killed the blades on my ca18 t25, had to get new turbine blades and a new turbine housing. cost me alot but the turbo has been balanced to well over factory specifications (well over 150k rpm) and should be in good shape to make me 15psi all day long with little problems. it also has a warranty, hehe. paid way too much ($420) but i had to have a turbo back on the car fast and couldnt afford to shop around. back on track here, when it died it just made a pathetic noise and the car didnt really go anywhere. ok, im done. ill go ramble elsewhere now..

- tim

[andrave]

ceramic blades only go when you overboost them... in oem form they are basically as reliable as steel units.the R32 turbos, to the best of my knowledge, have steel blades. Again, I've found conflicting information on many different sites as to the differences to the turbines from R32, R33, and R34 models. And besides, even steel blades melt down and blow up whenever you overboost them.

[quest]

oh oh.. those 1jzgte twin ct12 are ceramic ? I better tell my boy. He has the 2.5 in a 83 corolla running sds and just turned the boost up to 20psi

A friend had two RB20det motors. the turbos were both different. One motor had "ceramic turbo" on the piping and the other had a thicker cartridge... I'd imagine this was ball-bearing. These turbos bolt up T3 size but wheels look T28ish.He ran his 1st motor at 15psi and bang a 70shot... POOOOFFFF! powder everywhere heheh quite spectacular tho.

[andrave]

yes, tell him not to boost above 14 psi, thats the safe reliable limit. Besides those turbos are tiny, at 20 psi they would be heating up the charge, so inefficient...turbonetics will rebuild with steel wheels good for 490 hp, or he could just get a new manifold and go with something larger.oh well anyway, yeah the changed the turbo on the RB20, the old old ones suck, the newer ones weren't so bad.

[andrave]

http://cgi.ebay.com/ebaymotors...71461there is a "nismo" (at least it is advertised as one) variant going for 150 currently if anyone is interested...

[undertaker]

i don't think fitting a single gtr turbo to a ca18 is a good idea, looking at their original application they are designed for a 1.3L motor. it may work as they can produce a fair bit of power on an rb26 but i would only try it as an experiment. my guess is that a standard ca t25 will perform better at high revs.

[andrave]

and what are you basing that on? if anything, the RB turbo is capable of flowing more air at high rpm thanks go its significanlty larger compressor wheel.

[undertaker]

i am basing my assumption on the original hp application being lower spec than the ca turbo. i think the rb turbo can flow around 200hp in single form but i wouldn't try to fit one if it was a lot of work. if any one does try it i will be very intereted in the results!

[float_6969]

It used a sequential turbo setup IIRC. So the turbo's weren't the same size. One was small and spooled quickly, and the other was larger and flowed well in the top end. If you used the larger turbo I would imagine that it would work well. I don't know the A/R off the top of my head otherwise I could tell you.

[andrave]

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.

[IvoryJ30t]

ok, heres something kinda unrelated by important.

in the ebay auction above, those turbos have adaptors on them to go from the 3 bolt compressor out-2 bolt ic piping.

are those stock skyline adaptors? because the turbos i want to use are 3 bolt compressor out and i am going to need those adaptors.

just wondering if they come on the stock units, or if i have to get them from somewhere else.