Sheedy Built Supra
- Thread starter sheedy126
- Start date
IndigoMKII;1980226 said:
definitely not, im not sure what the deal is..
2 stock ct 26's, hx35 used was bad, rebuild from my friend didnt go well, now the turbo that was suppose to be really nice..failed.
maybe im having oiling issues, or could just be a coinsidence
that all depends on how much they're willing to spend to keep a customer happysheedy126;1979557 said:
Makes you wonder. Without truly diagnosing the failure on the first two you would kind of assume there is a problem that is killing the turbos.
I was able to get a refund for my DM 57 Trim without too much hassle but my 60-1 never had a issue afterwards. I have never heard what the fault was though... Which kinda bugs me
I was able to get a refund for my DM 57 Trim without too much hassle but my 60-1 never had a issue afterwards. I have never heard what the fault was though... Which kinda bugs me
looks like yours blowing out the oil seal from too much oil pressure, only other thing i can think of that would cause this is excessive blow bysheedy126;1980322 said:
I wish I knew the issue so I could go after it and fix it.
I was told specificly not to run a restrictor on the holset turbo, I wonder if that could be wrong. I doubt its blow by as its a pretty fresh rebuild and was built with tighter tolerances.
I'm running about 3psi idle and 25-30ish psi at 3000 rpm.
Any holset experts that could chime in with their setup and any input would be greatly appreciated
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I was told specificly not to run a restrictor on the holset turbo, I wonder if that could be wrong. I doubt its blow by as its a pretty fresh rebuild and was built with tighter tolerances.
I'm running about 3psi idle and 25-30ish psi at 3000 rpm.
Any holset experts that could chime in with their setup and any input would be greatly appreciated
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Well, after do a lot of research, I hear that these holset turbos do not like high oil pressure, especially on gas engines. They like to see a max of around 40 at full rpm. Since this turbo started dumping oil at cold start just warming up where oil pressure is 50-60 psi, I'm thinking that's way too much causing the seals to go.
After reading about resteictors, I may want a .60" or .70 ish resteictor I believe. But will still need to do a little more research.
There isn't a ton of information about 7mgte's and holset turbos
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After reading about resteictors, I may want a .60" or .70 ish resteictor I believe. But will still need to do a little more research.
There isn't a ton of information about 7mgte's and holset turbos
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I think its a problem with your drain. -4 at our oil pressures should not be able to flood the CHRA in a HX35 with a non-restricted -10 drain.
This was taken directly from a holset service manual.
13. Oil pressure of 150 kPa (20 lbf/in2) must show at the turbocharger oil inlet within 3 - 4 seconds of engine
firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
14. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during
cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).
This was taken directly from a holset service manual.
13. Oil pressure of 150 kPa (20 lbf/in2) must show at the turbocharger oil inlet within 3 - 4 seconds of engine
firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.
14. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during
cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).
idk how i never saw this thread!!! i guess thats what i get for never looking in the build thread section. im pretty sure you don't need a oil restrictor. i don't have one on my na-t 2jz and it makes higher oil pressure than my old 7m. im using a -4 feed and -10 return. been running it for a while now and it doesn't leak a drop. i would say if you keep blowing turbos there has to be a issue with the feed or return or possible extreme blowby but ive seen motors that blow the dipstick out cause of so much blowby and the turbos don't fail. like my buddy's old volvo. is your return going to the stock location or some where else?
I'll take a look at my drain and see if there is any blockage or kinks. It's going back into the factory location to the block. Would you recommend running is where the factor oil cooler drain would be?
Since im running a aftermarket cooler and remote oil filter setup?
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Since im running a aftermarket cooler and remote oil filter setup?
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^ great advice on the drain. My journal bearing bw instructions told me to prime my turbo before actually starting. I cranked for a while until i saw oil flowing from my -14 drain.
My drain goes where the factory return goes (1jz). I have never had an oiling issue.
My drain goes where the factory return goes (1jz). I have never had an oiling issue.
sheedy126;1980801 said:
i would say the stock drain should work better as long as the turbo isn't mounted so low that the drain levels out. where the stock cooler returns will most likely work to but if you like to run it with a extra quart like you should then that spot is more likely to get below oil level especially on sustained cornering G's. maybe post some pics of how you have the drian before you mess with it and see if anyone sees something thats a issue.