islandsupra Posted March 26, 2007 Share Posted March 26, 2007 Guys, I'm trying to get at least a write up from this guy in the US who I spoke to ... he was actually telling me that he has been doing 23 PSI on stock Jap turbos for about a yr now .... I did ask whether he was certain that they weren't US spec ones ... and he re-iterated ... no.. the ceramic bladed Japanese spec ones. Told him that all over the internet, I read articles indicating that running these turbos above 18 PSI could cause the compressor wheel to break ... he told me that the problem is those cars aren't properly tuned .... in most instances they are running leaning ... and the excess heat is what causes failure of the turbos. Would like to know your views on this.... in the meantime, I'll do my best to get something more detailed on his setup Quote Link to comment Share on other sites More sharing options...
AlanM Posted March 26, 2007 Share Posted March 26, 2007 Was running mine at 1.4 and 1.6 Bar for a wee while until I started reading stuff on here about the dangers of doing this, restricted to 1.2 Bar for the mo Quote Link to comment Share on other sites More sharing options...
islandsupra Posted March 26, 2007 Author Share Posted March 26, 2007 is there a vast difference in power between 1.2 and 1.6 bar? ... read that the turbos feel like they are out of breath above 1.2 Quote Link to comment Share on other sites More sharing options...
Lucifer Posted March 26, 2007 Share Posted March 26, 2007 Yes - Not enough Fuel and Wheeey of Efficiency. Quote Link to comment Share on other sites More sharing options...
islandsupra Posted March 26, 2007 Author Share Posted March 26, 2007 He also said something about putting a stronger spring on the wastegate to hold it under the extra boost. Quote Link to comment Share on other sites More sharing options...
SimonB Posted March 26, 2007 Share Posted March 26, 2007 With the correct fueling and cooling etc you can run 1.3BAR (although it will probably reduce their life a fair bit). There's no point running any more than that as you are so far out of the efficiency range you will probably lose power rather than gain any. Quote Link to comment Share on other sites More sharing options...
Ian C Posted March 26, 2007 Share Posted March 26, 2007 I did some performance testing once, and at 1.5bar the power dropped off markedly compared to 1.3 to 1.4bar. Admittedly this was on hybrids but as far as I'm concerned if a hybrid turbo runs out of puff at 1.5bar the stockers can forget it. -Ian Quote Link to comment Share on other sites More sharing options...
Kranz Posted March 26, 2007 Share Posted March 26, 2007 I did some performance testing once, and at 1.5bar the power dropped off markedly compared to 1.3 to 1.4bar. Admittedly this was on hybrids but as far as I'm concerned if a hybrid turbo runs out of puff at 1.5bar the stockers can forget it. -Ian Which hybrids Ian??? J spec or UK?? Do you know what comp wheels they had?? Garrett?? Size & trim?? I'm contemplating using disco potato (GT2860RS) 62 trim wheels in my J spec hybrids rather then the T04E 60 trim wheels normally found in them. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.