asupracar Posted November 17, 2004 Share Posted November 17, 2004 Hi as I am new to the supra I was wondering what sort of boost pressure people were running when their turbos gave up on them. + milage This info would be usfull to me Cheers Link to comment Share on other sites More sharing options...
stt Posted November 17, 2004 Share Posted November 17, 2004 The average life expectancy on stock jap spec ceramic turbos are around 80,000k,doesnt make no odds what pressure you run with them,just noticed youve got a uk spec which means steel turbos and hopefully a lot longer life! Link to comment Share on other sites More sharing options...
GeordieSteve Posted November 17, 2004 Share Posted November 17, 2004 40,000 miles and 1.2 Bar Link to comment Share on other sites More sharing options...
JamesG Posted November 17, 2004 Share Posted November 17, 2004 Originally posted by stt doesnt make no odds what pressure you run with them Why do you say that? I would have thought that producing a higher boost pressure and running the turbo faster and hotter would wear it more quickly and reduce its life expectancy. James. Link to comment Share on other sites More sharing options...
asupracar Posted November 17, 2004 Author Share Posted November 17, 2004 High boost = shorter life?? Link to comment Share on other sites More sharing options...
stt Posted November 19, 2004 Share Posted November 19, 2004 Unless your running silly amounts of boost the difference between how long they last wouldnt be a great deal different whichever way you do it,If theyre gonna blow theyre gonna blow Link to comment Share on other sites More sharing options...
Jake Posted November 19, 2004 Share Posted November 19, 2004 stt, What would you regard as "Silly levels of boost"? Link to comment Share on other sites More sharing options...
Gordon F Posted November 19, 2004 Share Posted November 19, 2004 Originally posted by stt The average life expectancy on stock jap spec ceramic turbos are around 80,000k, I'd be very interested to know where that figure came from. Maybe I should start saving now Link to comment Share on other sites More sharing options...
Fifty Posted November 19, 2004 Share Posted November 19, 2004 That makes mine + 35000 kms above average then. Enjoy your cars guys and stop worrying when they are gonna blow up lol they may run FOREVER 50:innocent: Link to comment Share on other sites More sharing options...
Paul -C- Posted November 20, 2004 Share Posted November 20, 2004 If the turbos blow can you just disconnect a VSV to disable them, then drive the car without turbos? Link to comment Share on other sites More sharing options...
Aerotop Dave Posted November 20, 2004 Share Posted November 20, 2004 Originally posted by Gordon F I'd be very interested to know where that figure came from. Maybe I should start saving now Just what I was thinking! 83k-odd now and soon to decat Link to comment Share on other sites More sharing options...
asupracar Posted November 20, 2004 Author Share Posted November 20, 2004 Originally posted by Paul -C- If the turbos blow can you just disconnect a VSV to disable them, then drive the car without turbos? anyone know the answer to this Link to comment Share on other sites More sharing options...
dude Posted November 20, 2004 Share Posted November 20, 2004 If no2 blows then there is a trick with the VSV to let no1 boost longer , interestingly most of the failiures ive seen lately are number 1 !!!!!, most of the time there is so much damage that the smoke screen behind will prevent driving , ask Ashley Willis / Matt B and Foodfreak , theres were so bad you couldnt even reverse because you couldnt see . Dude:flame Dev Link to comment Share on other sites More sharing options...
Rich Posted November 20, 2004 Share Posted November 20, 2004 both blew at 33,000 1.2 bar,though the jap who had it before me had the boost cranked right up above 1.6 bar when he raced it on the track. Link to comment Share on other sites More sharing options...
asupracar Posted November 20, 2004 Author Share Posted November 20, 2004 Anyone got any ifo on when their UK specs blew. I know they last longer- just some figures. Link to comment Share on other sites More sharing options...
Branners Posted November 20, 2004 Share Posted November 20, 2004 124,000 miles on my UK spec, they ran 1.2bar+ for about 12,000 miles, stock boost prior to that. JB Link to comment Share on other sites More sharing options...
Steve W2 Posted November 20, 2004 Share Posted November 20, 2004 This is one of those gei questions that is pointless in answering. No offence to the guy who asked, but really, come on, we are all a bit cleverer than this. The turbos have been designed to last as long as any other mechanical component in the car. They go because they are more prone to failure when not cared for. If they have been ragged from cold and not left to cool properly when well used then that will have a detremental effect on their life. If you run higher than standard boost you ARE reducing the life of your turbo's. To quantify how much is pretty near impossible, but one thing is for sure, the higher pressure you run them at the more likely they are to pop. Ragardless of the bandied 1.2 Bar 'safe' figure. Steel turbo's (UK Spec) may have stonger blades, but if your bearings are knackered becuase of lack of cooling after a run they WILL break just like the ceramic J-Spec ones. Great the turbines themselves may still be in tact if they are steel, but it doesn't make any difference, the cost of replacement is largely down to the labour in re-balancing the shaft/bearing assembly anyway. Link to comment Share on other sites More sharing options...
Aerotop Dave Posted November 20, 2004 Share Posted November 20, 2004 Originally posted by Branners 124,000 miles on my UK spec, they ran 1.2bar+ for about 12,000 miles, stock boost prior to that. JB I find that quite scary (the short life after upping to 1.2). Is that because they were pretty old anyway and the extra stress near the end of their life was too much, OR that 1.2 bar eats them that quickly (12,000 miles)...? Link to comment Share on other sites More sharing options...
Branners Posted November 20, 2004 Share Posted November 20, 2004 I ran my j-spec at 1.4bar for more than 12,000 miles so its not the mileage with increased boost, it the mileage and age together. After 100,000 miles on a car things do start wearing out. The Supra can keep going for thousands and thousands more miles after that but some components are prone to failure with high miles. Turbos are pretty much a replaceable component on most turbo based cars, its just not a cheap option on a supra. I did worry Big Roy when I told him about the failure and my mileage but his Supra is way past that mileage now with high boost and the turbos are going strong. I also think the intercooler is partially to blame, it was quite a warm day, the intercooler was a little shot and so the turbo just gave up the ghost. It had also been smoking on overrun for about 4000 miles so the turbos were on their way. JB Link to comment Share on other sites More sharing options...
Guest emicen Posted November 21, 2004 Share Posted November 21, 2004 To actually say this is worthless speculation is not valid, however, from an engineers point of view, I'd take this kind of data - age, spec of turbos, mileage, boost-life and stick it in a huge excel sheet and look for a trend. Why do I say huge, because I'd be interested in at least 100 pieces of data at the very minimum before I started speculating on trends or making assumptions about boost limits for safe use etc. What might be more interesting for potential owners or the peace of mind of current owners would be, when they went how much did they take with them?! Seals or impellor failure leading to total rebuild? Link to comment Share on other sites More sharing options...
Aerotop Dave Posted November 21, 2004 Share Posted November 21, 2004 Originally posted by emicen Why do I say huge, because I'd be interested in at least 100 pieces of data at the very minimum before I started speculating on trends or making assumptions about boost limits for safe use etc. Why 'at least 100' then? Link to comment Share on other sites More sharing options...
MONKEYmark Posted November 21, 2004 Share Posted November 21, 2004 you will be hard pushed to find 100 people with blown stock turbos. even hybrid turbos have let go and they built with stronger internals. if you worried about blowing them turn boost down to 1 bar. if you have it in your head they will let go one day then have fun while they last. you could also buy a set of second hand turbos, who knows how long they will last. Link to comment Share on other sites More sharing options...
Scooter Posted November 21, 2004 Share Posted November 21, 2004 I think Steve W2 has got this right. There are loads of cars (mine Aerotop Dave Gordon F etc) that have high(ish) miles and original turbo's AND stock boost. Would these cars turbo's be intact now if run at 1.2+ bar for the last 'X' miles. When/who was the site's last turbo failure when running stock boost? has there been one? Link to comment Share on other sites More sharing options...
MONKEYmark Posted November 21, 2004 Share Posted November 21, 2004 i started modding my car at 50,000 miles about now its at 70,000+ and been running 1.1 and peaking at 1.5 bar on odd times. now seems to hit a max of 1.3bar Link to comment Share on other sites More sharing options...
Jake Posted November 21, 2004 Share Posted November 21, 2004 I always thought my car was runnig about 1.2 bar but since fitting the GReddy e-01 I see that it actually peaks at 1.25 most days (with the boost controller turned off) Link to comment Share on other sites More sharing options...
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