Just toasted my second ct-26 50 trim, in approx 5000 miles. i know im not having oil issues , or any cooling issues. What could be the reason these are failing. Also if i were to switch to another turbo what turbo would you guys suggest. i am looking for something that is going to spool fairly fast but be able to produce 17 psi whitout any problems
sean

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you trying to produce that on a ct-26? (if so that could be why your toasting them, 16psi is the "uppermost limit" for the ct-26)

also, where are u getting your turbos? (how used are they?) Itchy got like 2 from junkyards for $50 a pop, and blew them in like...hours?

the turbos were being rebuilt from a shop in cali called performance turbos. Orginally i was pushing 17 psi with the turbo but people on this board convinced me that it was a bit to much for it. turned down to 15ish. my motor is built to handle 20- 25 psi but i only want to go as high as 17.

first i would say figure out what EXACTLY is the problem...then if you have ruled out everything and your sure its just "used or old turbos" i would go with a ct-20b...they are the next step up and spool up just as quickly as a ct-26

time for a bigger turbo

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i dont know a ton, but turbos dont just "go".. i honestly want to say, there is an oil problem, or a cooling issue...i assume u have a turbo timer, or if u push the car hard/boost at all that u let it run for atleast 5 minutes b4 u shut it off when u arrive at your destination.

Good luck bro.

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x100000
Something about your setup is blowing the turbos.
How do you know the turbo is shot to begin with?

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yesterday i took it out for a run , let it warm up like usual, did everything normal. boosted it a couple times and noticed dirty white smoke coming out of the exhaust. which is the same color smoke it made when the other turbo's thurst bearing went. i then checked for play and it has devolped conciderable play when pushing and pulling towards the exhuast housing , so back and forth play not up and down play. the turbo also has started leaking oil threw the seals. i always let the car spool down for at least five minutes after driving it. i have really good oil pressure, and the line that supplys the oil was clean last time i checked it. also when i blew the last turbo i changed my bov to the new hks bov becuase i wanted to make sure i wasnt having some type of compressor surge issue.

on your profile, you have an Emanage ultimate listed. (again i state that im not a rocket scientist at this turbo stuff) but, is there any chance that an inproper tune would cause premature failure of a turbo? Ive always heard of poor tunes being attributed to blown motors, and such. But if as u say, everything is flowing and your presure is fine, then i really dont know. Maybe oil restrictor?

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i also am wondering if my tune may have had something to do with it i have had a chance to look at my run files from yesterday and i did see detonation during boost not a lot but it was definatly there. i hope it isnt the oil restictor i put that on to protect my turbo from blowing out the oils seals. the turbo it self has no play what so ever up and down it only has back and forth play. i am also wondering if maybe when i was pushing it to 17 psi if that had negative effects which killed the turbo.

This post has been edited by blckcelica95: May 14, 2008 - 3:06 PM

It's probably the shop you're having them rebuilt at.
I had problems with a shop in Ca a few years ago, I went through several in a year.
ATS did an excellent job on my current Supra turbo.

I haven't had a lot of problems with the CT26s, even running higher than stock boost.
My first Alltrac had 173xxx on the original turbo, though I only boosted that to 10 PSI.

A 50 trim shouldn't have a problem boosting 17 PSI, the RC turbos don't, and neither do the Supra turbos, both have a slightly smaller compressor wheel and the same exhaust housing.

do you rember the name i wonder if it is the same guy

I have a suggestion if you want to keep a ct-26 and want better performance from them look at fensports.com it's a UK site and they specialize in toyota everything they have several upgrade built ct-26's try looking there. http://www.fensport.co.uk/parts.htm

This post has been edited by bringindaheat573: May 15, 2008 - 10:49 PM

If your piston land ring broke on any piston it will cause to much Positive Crack Pressure and that will blow your turbo for sure. I know you said your engine was built. Just something else for you to look at. Sounds to me like you need to just get a bigger turbo so you don't waste that built engine!

yeah a biger tubo is in the work just trying to figure out witch one, it nothing to do with tthe pistons compression is 200 to 210 across the board. talked to a few turbpo shops and appernetly the ct 26 thrust bearing do have a tendency to blow when a bigger compressor wheel is put on .