marc_p Posted May 13, 2009 Share Posted May 13, 2009 Gutted mate:( But on a plus side, I have a neat turbo bypass system for a quick fix: and it comes with my own hello kitty exhaust system sorry:( On a serious note.............I say t67:cool: Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 (edited) 3" dp and HKS tubular mani. Wonder if your egt gauge is correct (or wether mine is!) Thing is I see 800 deg temps when cruising (when I've searched I found a couple of others with similar), it's just when I sustain high gear runs it starts climbing over 900. have you tried and tightened the cold side compressor housing , the vibration on the engine may have vibrated the screws loose slightly. i would stick with the 67dbb setup as you are getting to old and your little heart cant manage the pressure anymore.... I will check that tonight Michel. I am going to bud, it's enough power for me, lag is perfect, power band is great, for me the GT4088R is the perfect turbo. I'm going to contact AET today as per Mike B to see about getting mine rebuilt, maybe they can also identify the failure cause, or even rebuild it to a standard better than it currently is. I'm also going to put on the 4" DP/MP and increase the WI jet size, I will get my EGT's lower . I also think it's better to find the cause of my EGTs before splashing out ££££ on new turbos & manifolds as the same may happen to them, if I can have a quick fix solution (ie rebuild) I can start to identify what is wrong. Gutted mate:( But on a plus side, I have a neat turbo bypass system for a quick fix: http://www.germes-online.com/direct/dbimage/50327532/Aluminum_Alloy_Pipe.jpg and it comes with my own hello kitty exhaust system http://www.popgadget.net/images/hello%20kitty%20exhuast%20pipe%20(2).bmp sorry:( On a serious note.............I say t67:cool: :p :p I think it'll be another GT4088R or T67DBB, they are probably the 2 turbos suited closest to my needs. Edited May 14, 2009 by jevansio (see edit history) Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 14, 2009 Share Posted May 14, 2009 800 deg on cruse:scared: now thats what i call high, the most i see on cruse is 500c i would be inclined to say something is not quite right, anyway hope you find a suitable solution:) Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 Just spoken with Andy at AET, I'm sending the turbo there so they can identify what killed the turbo (hopefully the housing, but if it were an oil feed issue I'd rather know before putting a new turbo on). Then depending on the damage they can rebuild it. If not it's circa £1400 for a new one I'm afraid Quote Link to comment Share on other sites More sharing options...
hodge Posted May 14, 2009 Share Posted May 14, 2009 jay what can i say matey. Its a shit storm. Im totally gutted for you matey. Ill give you a buzz tonight. Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 jay what can i say matey. Its a shit storm. Im totally gutted for you matey. Ill give you a buzz tonight. :D You're not wrong there bud , okey dokey Quote Link to comment Share on other sites More sharing options...
Mike B Posted May 14, 2009 Share Posted May 14, 2009 Thing is I see 800 deg temps when cruising (when I've searched I found a couple of others with similar), it's just when I sustain high gear runs it starts climbing over 900. I also think it's better to find the cause of my EGTs before splashing out ££££ on new turbos & manifolds as the same may happen to them, if I can have a quick fix solution (ie rebuild) I can start to identify what is wrong. I hate to say it but I saw really high egt's on my 4088R, sounds similar to you...when I changed to T67 they dropped 150 degrees with the right housing, no other chages were made aside a turbo swap. The 4088R is a different core to the T67.. I think the T67 has less blades to my knowledge. I know you like it, but I swear there is something fishy with that tubby. Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 Yeah I'm a sucker for this turbo I think my current plan is to get turbo inspected by AET to find cause of failure. If it can be rebuilt do that and refit. If not get another GT4088R or equivalent & refit. Either way fit 4" DP/MP and larger WI jet. Remap by Ryan and keep EGT's under 900c. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 14, 2009 Share Posted May 14, 2009 Just one further question to all of you with a GT4088, do you use a turbo blanket? Quote Link to comment Share on other sites More sharing options...
L33 Posted May 14, 2009 Share Posted May 14, 2009 i wish this post never started my gt4088 build will be finished soon im going to run a blanket to keep bay temps down Quote Link to comment Share on other sites More sharing options...
T2 MSW Posted May 14, 2009 Share Posted May 14, 2009 Sorry to hear this Jay, bet that t51r would come in useful right about now Im just glad a did not choose the 4088r for my build as it was one of the options on the table and the couple of previous failures on the forum was what put me off. Quote Link to comment Share on other sites More sharing options...
Rich Posted May 14, 2009 Share Posted May 14, 2009 i wish this post never started my gt4088 build will be finished soon im going to run a blanket to keep bay temps down A blanket is possibly the worst thing you could do to this particular turbo.The extra heat being kept inside the exhaust housing by the blanket will make the housing even more prone to warping or the destruction of the blades due to excessive heat. Quote Link to comment Share on other sites More sharing options...
L33 Posted May 14, 2009 Share Posted May 14, 2009 ooooo saves me 100 quid, cheers Quote Link to comment Share on other sites More sharing options...
JamieP Posted May 14, 2009 Share Posted May 14, 2009 (edited) 800 deg on cruse:scared: now thats what i call high, the most i see on cruse is 500c i would be inclined to say something is not quite right, anyway hope you find a suitable solution:) Mine is in the 800's on cruise on the motorway, i think Ryan keeps em lean on cruise for fuel economy? soon as i touch the loud peddle and it gets some fuel the egt's fly down. Edited May 14, 2009 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
b_have Posted May 14, 2009 Share Posted May 14, 2009 i wish this post never started my gt4088 build will be finished soon im going to run a blanket to keep bay temps down I've never run without a blanket. Quote Link to comment Share on other sites More sharing options...
L33 Posted May 14, 2009 Share Posted May 14, 2009 b'have - charlie? i bought the polished stuff from you ages ago? considering you track yours and use a blanket its safe to? the garage did say it would be a good idea for me to. is both your supras gt4088? dont suppose you have one for sale, your garage was like a sweet shop! Quote Link to comment Share on other sites More sharing options...
b_have Posted May 14, 2009 Share Posted May 14, 2009 b'have - charlie? i bought the polished stuff from you ages ago? considering you track yours and use a blanket its safe to? the garage did say it would be a good idea for me to. is both your supras gt4088? dont suppose you have one for sale, your garage was like a sweet shop! Hi Lee, yes tis I No problems as yet (probably regret that statement next time out!) Sold the auto, that was a T61. (now Stonkins) Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted May 14, 2009 Share Posted May 14, 2009 As i have said many times Jay. Move the EGT sensor to one of the exhaust runners. Measuring the EGT in the turbine housing will always be 50C+ hotter as its the first restriction in the exhaust system and this restriction causes a massive hot spot. Hence why the turbine housing is Cast. Turbos are designed this way as its the heat energy which essential drives the turbine. Ryan Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 Just one further question to all of you with a GT4088, do you use a turbo blanket? I don't, I used to until my 1st turbo died, I removed it after that Sorry to hear this Jay, bet that t51r would come in useful right about now Im just glad a did not choose the 4088r for my build as it was one of the options on the table and the couple of previous failures on the forum was what put me off. Fancy making a donation Mike , As i have said many times Jay. Move the EGT sensor to one of the exhaust runners. Measuring the EGT in the turbine housing will always be 50C+ hotter as its the first restriction in the exhaust system and this restriction causes a massive hot spot. Hence why the turbine housing is Cast. Turbos are designed this way as its the heat energy which essential drives the turbine. Ryan You certainly have bud, I've just not got round to it, maybe now the turbine is off it may be worth doing Quote Link to comment Share on other sites More sharing options...
Terminator Posted May 14, 2009 Share Posted May 14, 2009 (edited) EGT's are no higher than 900 upto to 4th, 925 in 5th and 950 in 6th (although the amount of times you can hold it in 6th is negligible), sensor is in the turbine housing so those are the temps the turbine is seeing Those temperatures sound high to me. (Oops a bit late with the comment.) Just read your EGT probe is in the Turbo housing. As Ryan said put it in a runner, number 6 is good. Edited May 14, 2009 by Terminator (see edit history) Quote Link to comment Share on other sites More sharing options...
L33 Posted May 14, 2009 Share Posted May 14, 2009 so its a bit mixed if a blanket should be used?! whats the effects with/without one? bit of science? lol Quote Link to comment Share on other sites More sharing options...
jevansio Posted May 14, 2009 Author Share Posted May 14, 2009 Those temperatures sound high to me. (Oops a bit late with the comment.) Just read your EGT probe is in the Turbo housing. As Ryan said put it in a runner, number 6 is good. I've nearly got the turbo off Phil, I think I will take you guys advice & move it onto the manifold, runner 6 you say, 1" from the flange? Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted May 14, 2009 Share Posted May 14, 2009 I've nearly got the turbo off Phil, I think I will take you guys advice & move it onto the manifold, runner 6 you say, 1" from the flange? 1-2" is ideal Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted May 14, 2009 Share Posted May 14, 2009 A blanket is possibly the worst thing you could do to this particular turbo.The extra heat being kept inside the exhaust housing by the blanket will make the housing even more prone to warping or the destruction of the blades due to excessive heat. That was the reason for my question, and i agree with your statement. Mine is in the 800's on cruise on the motorway, i think Ryan keeps em lean on cruise for fuel economy? soon as i touch the loud peddle and it gets some fuel the egt's fly down. Mine runs at stoic on cruse, and i still only see 500c, how lean does Ryan run them? As i have said many times Jay. Move the EGT sensor to one of the exhaust runners. Measuring the EGT in the turbine housing will always be 50C+ hotter as its the first restriction in the exhaust system and this restriction causes a massive hot spot. Hence why the turbine housing is Cast. Turbos are designed this way as its the heat energy which essential drives the turbine. Ryan Given that the housing can be 50c hotter, mine must be pretty cool then, as my sensor is there, good for a GT4088 but not for efficiency. Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted May 14, 2009 Share Posted May 14, 2009 That was the reason for my question, and i agree with your statement. Mine runs at stoic on cruse, and i still only see 500c, how lean does Ryan run them? Given that the housing can be 50c hotter, mine must be pretty cool then, as my sensor is there, good for a GT4088 but not for efficiency. I run them at 14.7-15:1 off boost depending on the rpm and load Reason they are hotter on the Solaris equipped car is also a part of the reason why they make more torque and spool up quicker as i set something slightly different which is used alot in the racing world and it works wonders with the 2jzgte. Your Egts are low as you only run of the wastegate rick not 1.6bar Quote Link to comment Share on other sites More sharing options...
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