JamieP Posted December 21, 2014 Share Posted December 21, 2014 (edited) The only time I had a problem with boost pipes popping off was when I was running rubbish BOV's, the Turbosmart and Tial ones don't seem to be able to open quick enough, mine would pop off if I was short shifting (car running 2.6 bar) changed to HKS Racing BOV and all was good. I even left the Turbosmart one in place and you could hear them opening at different times, was like a twin dump Also agree with the comments on the mikalors, they are rubbish, the pipe won't pop off but they don't clamp evenly and you get big boost drop with them. Murray constant tension clamps are the best. Edited December 21, 2014 by JamieP (see edit history) Quote Link to comment Share on other sites More sharing options...
Shane Posted December 21, 2014 Share Posted December 21, 2014 They MUST be clean and oil free first! Been using it for years, but now my hair is going I get funny looks in Tesco! Have a chat with Jazz, he has some wonderful jollop for you. Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 21, 2014 Author Share Posted December 21, 2014 Thanks jamie and shane but my pipes are not popping of now im getting 1.2 bar boost withought the boost controller switched on its a hks evc 5 were as before i would see .8 bar boost with it off but i thought uk cars are not suppose to do that unless you fit a boost controller! Quote Link to comment Share on other sites More sharing options...
Benjy Posted December 21, 2014 Share Posted December 21, 2014 I wouldn't worry too much. My J-spec hits 1bar with the BC switched off in cold weather. Your turbo's should be ok up to 1.4 so just enjoy it mate. If it goes over that, then worry! Quote Link to comment Share on other sites More sharing options...
ATB Posted December 21, 2014 Share Posted December 21, 2014 Thanks jamie and shane but my pipes are not popping of now im getting 1.2 bar boost withought the boost controller switched on its a hks evc 5 were as before i would see .8 bar boost with it off but i thought uk cars are not suppose to do that unless you fit a boost controller! I got a US spec, same as an UK just with the wheel on the left side. I also run mine without boost controller and on wot I get 1.2 bar. I've been told on here I should be good to go, so I think you are safe with that. Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 21, 2014 Author Share Posted December 21, 2014 Really! Iv been reading for ages that anything over 1.2 was not safe or good for the turbos and you will blowing in hot air guess not then so is the safe limit 1.4bar on uk turbos then not 1.2? I think i should book in for a dyno session just to make sure all is well and reset the boost controller i guess but who should o take it too the last time it got dynod was at thor about 6years ago Quote Link to comment Share on other sites More sharing options...
Nic Posted December 21, 2014 Share Posted December 21, 2014 Really! Iv been reading for ages that anything over 1.2 was not safe or good for the turbos and you will blowing in hot air guess not then so is the safe limit 1.4bar on uk turbos then not 1.2? I think i should book in for a dyno session just to make sure all is well and reset the boost controller i guess but who should o take it too the last time it got dynod was at thor about 6years ago You're correct 1.2bar is a good safe limit. If you're hitting 1.2bar with the boost controller turned off the wastegate can't be opening fully. I'd start by disconnecting the boost controller pipes and putting them back to stock and see if this reduces the boost pressure, at this time of year with both cats removed you may see up to 1bar. Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 21, 2014 Author Share Posted December 21, 2014 Hi nic the cars been like it for over 4years now approx they only difference is the rear section was 2.5 inch and that it had a resinator on it now its 3inch and no resinator on it and it nearly straight so why would the wastgate not open fully as the uk cars have a bigger wasgate it should be controlling it however i dont think it went over 1.2 bar so i dont need to use it also my scramble boost is set to 1.3 for 10sec but iv only ever used it a couple of times cos it f$$$$in scary as hell lol but that was only with the old exhaust though if cw is on could you shed some light on this please because the last thing i want to do is blow somthing up thanks for everyone thats already helped though cheers guys Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted December 21, 2014 Share Posted December 21, 2014 (edited) I've never had a problem with intercooler pipes popping off with "3 double decat, and I've had the pipes off and back on when fitting a new intercooler. Reading the thread, you are right in what you are saying about the UK spec normally needing an ebc to raise boost to 1.2 bar as the larger wastegate releases more pressure than the comparible J-spec one. So I agree with Nic that if the wastegate has developed a fault and isn't releasing pressure the next weakest part that is giving is your intercooler pipes. Could it be stuck in the closed position perhaps? Edited December 21, 2014 by Marcus GTE (see edit history) Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 21, 2014 Author Share Posted December 21, 2014 How do i check? Quote Link to comment Share on other sites More sharing options...
Marcus GTE Posted December 21, 2014 Share Posted December 21, 2014 How do i check? I would do as suggested and return the boost hoses to stock to rule out your boost controller actuator causing the problem, and if it is still happening then it would point to the wastegate having a problem and you can look into replacing it. Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 21, 2014 Author Share Posted December 21, 2014 Ok cool will do that and report back thanks once again Quote Link to comment Share on other sites More sharing options...
ATB Posted December 21, 2014 Share Posted December 21, 2014 As I also have stock twins with stock lines, should I also be looking for a new wastegate? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 21, 2014 Share Posted December 21, 2014 The wastegate is part of the front turbo's turbine housing. It's unlikely the wastegate itself is stuck. More a sticky boost control solenoid, a leaky hose to or from the solenoid, or a combination of this and your bizarre sounding exhaust. I take it has little to no silencing? If that's the case the lack of any real back pressure will exacerbate boost control issues, even on a UK spec engine. Quote Link to comment Share on other sites More sharing options...
firin Supra Posted December 22, 2014 Author Share Posted December 22, 2014 The exhaust actually sound really good its not laud as i expected its actually rather quite compared to the 2.5inch i had on before chris and that had a resinator on it however iv got another issue now and that i cannot adjust the boost controller anymore it comes on i can switch from a and b settings but i cannot adjust boost or adjust certain settings wtf is going on i really cannot make any sence of whats actually happening hear iv been working on the car all day took of the exhaust from the cats had alook in moved the actuator all is well put the exhaust back on and now boost controller not working but i havent touched anything regarding boost controller iv had a look at the actuator and everything is connected i seem to be suddenly having problems all because i put a 3inch exhaust on can someone help regarding the evc 5 or tell me what could have happend 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.