RB25 turbos

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

How much are RB25 turbos going for these days? Is there anyone in this country who will rebuild these turbos? I heard turbonetics turned away someone who wanted a RB20 turbo rebuilt.

Just getting my ducks in a row so to speek.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

This may not be your cup of tea, buy why not learn?

Grab a used turbo or a busted up one from the junk yard, strip it down, learn the components, try to put it back together...

Clearly turbos are different from one manufacturer to another but it's definently a skill worth working for. It's pretty good money if someone comes to you.

However it is alot of work...

Try this guide it's quite good at explaining how to do it, and i'm sure with your knowledge and mechanical abilities it shouldn't be very hard.

http://www.vfaq.com/mods/Turbo-rebuild.html

Enjoy

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

That is definitely a lot of help, and most likely the route I will take. However, where would I find a rebuild kit for these turbos? I would also like to convert it to steel impellers. I've done a few google searches with no luck. It would be nice to find these kits in the states.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

Your best bet is to find a diesel truck shop that services turbos, and see if they carry steel impellers. They may also be able to rebuild it for you but this way is more cost effective and can be a way to supplement income. As a last resort you could contact various turbo manufacturers to see if they carry steel vanes...

Deisel truck shops are the best to find parts from because thats all the do is repair the turbos on the semi's

Hope that helps.

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

don't try to rebuild an RB25 turbo, chuck it. It's not impossible just not worth the headach. They are a proprietary Nissan design based on the Garrett. They have weird ball bearing races and some a plastic compressor wheel. Your money would be better spent getting a new high flow T3 or T3/T4 hybrid. we use them in japan because we can get them in the junkyards for $50.00.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

themadscientist wrote:races and some a plastic compressor wheel.

would be better spent getting a new high flow T3 or T3/T4 hybrid. we use them in japan because we can get them in the junkyards for $50.00.

Did i just read those correctly? Plastic compressor wheels?

What are the hybrids from that get them tossed into the junkyards? Are they stock or do the japanese throw out their aftermarket toys?

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

the later versions use plastic wheels, they probably call it a "thermopolymer" or some BS but; looks like plastic, feels like plastic, IT'S PLASTIC!These are OE turbos I speak of, if you can get a tight one they make good power and worth a couple of Jeffersons but spend money on overhauling one, complete waste.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

Must be nice to have OE hybrids...

Thanks for the info..

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

I just like the BB factor of the RB motor's turbos. I was thinking of using a T3 off the bat for my RB20DET, but was looking into some other options. I would, however, like to stay away from the plastic turbines. Upgrading is down the road, but a low cost switch of something similar or slightly better than stock is something I'd like to do from the start.

What about a VG30ET's turbo? They are steel turbines and a direct bolt on right?

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

FrEaK wrote:Must be nice to have OE hybrids...

Thanks for the info..

NO No, you misunderstand, I was reccomending he get a hybrid one from the aftermarket to replace the OE turbo. Nissan turbos are basically an inhouse version of the T3.

The VG30ET turbo is a good upgrade, no plastic wheel and can get you into the 300hp range.The RB20 and early RB25 turbos were not plastic.

Post by **kevy8up** » Tue Jan 13, 2004 12:53 pm

check out meggala.com and check out what he said about fitting different turbos on his RB20...plus they have a few sites u could check out also.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

Ok heh,I thought you were saying you could get a hybrid at the yard for 50 bucks, so it kinda threw me...

I was about to ask if the street are paved in gold also

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

well i did get a TD06 17C from a junkyard for $90.00 and a GT-R pump for free and a Impul computer for free and a trust type R blow off for $50.00 and a Blitz blowoff for $30.00 and well I think you are hovering a razor above your wrist so I won't go on:D

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

I'm so jealous....

Perhaps you should ship parts to us poor suckers?

You could supplement your income nicely

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

That's how I afford $3.00 a gallon gas and buying parts, I clear a measly $1800.00 a month at my job, parts pimping supports my mania.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

Hmmm would you be interested in perhaps a business proposal?

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

If you mean one guy hooking up another guy, always, moving a bunch of stuff for a business entity no, can't do it.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

Aye to much volume for one person i guess

Maybe i'll get a hold of you sometime for single shots though

Thanks again

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

themadscientist wrote:The RB20 and early RB25 turbos were not plastic.

I had always heard the RB20 and 25's were running ceramic/plastic turbines?

Post by **93RPS13** » Tue Jan 13, 2004 12:53 pm

does anyone know how laggy is the VG30ET turbo is on a Rb25DET or RB20DET??

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

early ceramic, late plastic, the ball bearings were laughable, bushed while slower spooling would have been more sturdy.

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

I see you have an FC, would you think a S5 TII turbo (better than the S4's in wastegate and flow I hear) would be a good upgrade/switch? They do have TO4 flanges, so that would require an adaptor, but they are slightly smaller than a full blown T4 correct?

I'm just am thinking about this before the motor goes in, since having the motor out would make the install easier.

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

I wouldn't use it, the single turbo VG30 turbo would be the best bet.

Post by **rbsileighty** » Tue Jan 13, 2004 12:53 pm

Sounds good. Where would the best place to run across one of those state side, and what is a good price range (so I don't get ripped off)? Thank you very much for all of your time and help.

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

I don't know, I've been in Japan for years.

Post by **Imissmyturbo** » Tue Jan 13, 2004 12:53 pm

So how would a this turbo do on an RB25?T3/T450 trim compressor.63AR exhaust stage III wheelInternal wastegateWould this turbo do ok on an RB25DET? If so you can get one for around 450-550 and it should bolt on. You would need to mod the outlet elbow and down pipe. Also most of these turbo's don't come with a wet housing so you would have to bypass the coolent.

Post by **FrEaK** » Tue Jan 13, 2004 12:53 pm

That turbo should be fine....

Post by **themadscientist** » Tue Jan 13, 2004 12:53 pm

bump up the exhuast housing a size.

Post by **Imissmyturbo** » Tue Jan 13, 2004 12:53 pm

Wouldn't going to an .82 exhaust housing make the compressor/turbine a mismatch? I don't see any listings for a 50 trim compressor in an .82 housing.

Post by **PROJECTRB240SX** » Tue Jan 13, 2004 12:53 pm

TRY THIS TURBO.

COMPRESSOR SPECS:.60 A/R HOUSING60 TRIM WHEEL

TURBINE SPECS:.82 A/R HOUSINGSTAGE 3 WHEELstandard with 270 degree thrust bearingoil lubricated centersection.

RB25 turbos

RB25 turbos

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