9krpmrx8's Boost Build Thread
#152
SARX Legend
Thread Starter
iTrader: (46)
Hmmm, I was reading up on Mitsubishi Turbos and supposedly the oil restrictor is built into the turbo. No restrictor comes with the kit as far as I can tell. Could this be the problem with the turbos dieing early?
I have not received a response on the oil pressure for the T618Z from Greddy but most of the turbos that I can find data on all have recommended oil pressure in the 35-45PSI range and there is a lot of talk about what excessive oil pressures do to damage the turbo.
Last edited by 9krpmrx8; 04-18-2011 at 04:01 PM.
#157
SARX Legend
Thread Starter
iTrader: (46)
I will check when I get home. I just cannot get over the fact that this turbo is seemingly unreliable in the RX8 when it is used on many other bigger, more powerful engines (RB26 for instance) without any real issues with premature failure.
#158
Turbo Member
iTrader: (10)
one guess would be high exhaust temps with no water cooling. The turbo should be reliable, the problem is that most people dont take the time to plan this turbo kit out, unfortunely its not plug and play. Now that we have a lot of logged mileage and usage with the greddy kit I am confident that we can make this kit much more reliable (recirc, proper jet air hook up, proper boost reading ie fix#2, and several other obvious changes for cooler running temps)
#159
SARX Legend
Thread Starter
iTrader: (46)
one guess would be high exhaust temps with no water cooling. The turbo should be reliable, the problem is that most people dont take the time to plan this turbo kit out, unfortunely its not plug and play. Now that we have a lot of logged mileage and usage with the greddy kit I am confident that we can make this kit much more reliable (recirc, proper jet air hook up, proper boost reading ie fix#2, and several other obvious changes for cooler running temps)
Yeah water cooling definitley helps but the skyline guys seem to use this turbo without water cooling and it is still reliable.
I recently chatted with a guy from an Aussie skyline board who has owned a few rotaries and does all kinds of rally's in extremely hot weather in his Skyline and he said the T618Z has been a reliable turbo for him up to the 400HP range but then he upgraded to a bigger HKS turbo. He suggested a turbo blanket, shielding, and the separate oiling system due to the excessive heat rotaries produce. But he said the separate oiling system adds complexity and could be bad if not designed and setup correctly.
I agree a ton of fixes have been identified and I am so glad I waited. I think many rush into it without proper prior planning.
#161
SARX Legend
Thread Starter
iTrader: (46)
^ True.
Well it looks like Fix #2 was done already, not sure how well though but we'll see. Anyway here is a rough layout of the kit. It appears the BOV is a Greddy Type R or a very good knock off but I have compared pics from every angle and it looks legit but it is just missing the sticker that goes on top.
http://www.flickr.com/photos/9krpmrx8/5633780686/http://www.flickr.com/photos/9krpmrx8/5633197519/http://www.flickr.com/photos/9krpmrx8/5633197999/
Well it looks like Fix #2 was done already, not sure how well though but we'll see. Anyway here is a rough layout of the kit. It appears the BOV is a Greddy Type R or a very good knock off but I have compared pics from every angle and it looks legit but it is just missing the sticker that goes on top.
http://www.flickr.com/photos/9krpmrx8/5633780686/http://www.flickr.com/photos/9krpmrx8/5633197519/http://www.flickr.com/photos/9krpmrx8/5633197999/
#168
SARX Legend
Thread Starter
iTrader: (46)
yeah it appears to have been done pretty well.
Question. Is anyone reading boost from two sources? I have the goodbox which has a boots gauge built into it, I am thinking of getting a standard 52mm boost gauge as well. Thoughts?