StuDoc 72 Posted November 13, 2012 Share Posted November 13, 2012 Where do we start.... So fitted my turbo and finally all was good. Then me and Dave EP fitted my lightweight flywheel. We had the standard TMIC off when doing this to give us more space.When we finished off and refitted it all I drove the car and noticed it wasnt making boost anywhere near the same.I started to undo the de-cat when we were trying to get the gearbox back on because the brace was in the way but cudnt get the final bolt undone so left it on. I assumed there was a small boost leak from somewhere causing this so never worried as i planned to take the turbo off again for some final work.So the next week the turbo came off got the work done now its back on everything refitted nice and tight and there is still massive lag. I'm hitting about 0.3 bar at 3000rpm and not hitting 0.6 to 0.7 untill around 4-4.5krpm.I havent gave everything a good check and fitted an adjustable actuator for the 1st time when i refitted the turbo I thought it could be down to the actuator but surely this would just cause lower boost and not lag?Is there any small vac pipes I could have over looked that could be causing this?? Whats your suggestions?Cheers Guys. Quote Link to post Share on other sites
TrisK Posted November 13, 2012 Share Posted November 13, 2012 Id be checking for boost leaks Quote Link to post Share on other sites
StuDoc 72 Posted November 13, 2012 Author Share Posted November 13, 2012 (edited) I kinda have mate but its just the basic TMIC with the 2 tiny rubber pipes. Plus it makes boost higher through the revs. That could be it creeping due to the TMIC though i suppose.But im sure the hoses are sealed and were fine before, Im defo going to have to give it another good check but im genuinely confused. Edited November 13, 2012 by StuDoc 72 Quote Link to post Share on other sites
pick1 Posted November 13, 2012 Share Posted November 13, 2012 I had this issue and it was down to the actuator it was sticking make sure the arm etc move freely on it mate as that was the cause of mine Quote Link to post Share on other sites
PaulStarletSR Posted November 13, 2012 Share Posted November 13, 2012 Id say possibly vac pipe or sumthin to do with the adjustable actuator no set right Quote Link to post Share on other sites
StuDoc 72 Posted November 13, 2012 Author Share Posted November 13, 2012 Aye am gna fiddle about with the actuator the only thing tht makes me doubt tht was was the week between doing the flywheel and the turbo it had the standard actuator on it and was still actng the same could be pure coincidence but ill give every idea a try mate. Quote Link to post Share on other sites
DavidAshton Posted November 13, 2012 Share Posted November 13, 2012 Actuator arm is too loose, as soon as its getting pressure its opening up the wastegate making it difficult to build pressure.Shortern the arm and it should sort it out. Quote Link to post Share on other sites
StuDoc 72 Posted November 13, 2012 Author Share Posted November 13, 2012 I was hoping this would be the cause but with the arm being set too long surely it wouldnt be making boost higher up?? Or could this be creep due to the tiny intercooler do you reckon? I hope it was a leak last week and the actuator this week lol. Quote Link to post Share on other sites
Mike@TD.co.uk Posted November 13, 2012 Share Posted November 13, 2012 If the arm is too long it will still make boost when higher in the rpm as there is so much gas flow from the engine.As David says, check the pre-load on the actuator arm first and go from there. Ensure it is holding the wastegate flap shut quite firmly.CheersMike JonesTuning Developments Ltd Quote Link to post Share on other sites
StuDoc 72 Posted November 13, 2012 Author Share Posted November 13, 2012 Kl I'll give that a go tonight and see how I get on and go from there.Cheers Quote Link to post Share on other sites
Chesh Posted November 13, 2012 Share Posted November 13, 2012 Does the blades on the turbo move freely Quote Link to post Share on other sites
StuDoc 72 Posted November 13, 2012 Author Share Posted November 13, 2012 Aye mate the turbo is spot on just been rebuilt and was boosting perfect before we done the flyy wheel and removed the Ic and de cat. Quote Link to post Share on other sites
StuDoc 72 Posted November 14, 2012 Author Share Posted November 14, 2012 So i checked last night and the arm on the actuator was slightly loose. I tightened it up a few turns and i do think it has began to sort the issue. The problem now being I had to have a pin made up as i didnt have the HKS 1 but the one on mine isnt a perfect fit so the actuator arm sits at an angle to the wastegate penny arm.Does anyone have a spare pin kicking about on an old turbo or actuator? Quote Link to post Share on other sites
TrisK Posted November 14, 2012 Share Posted November 14, 2012 So i checked last night and the arm on the actuator was slightly loose. I tightened it up a few turns and i do think it has began to sort the issue. The problem now being I had to have a pin made up as i didnt have the HKS 1 but the one on mine isnt a perfect fit so the actuator arm sits at an angle to the wastegate penny arm.Does anyone have a spare pin kicking about on an old turbo or actuator?just use a bolt and a nut, thats what my mate did when he had a hole/pin type the wrong way rounddrill it out and use a nut Quote Link to post Share on other sites
StuDoc 72 Posted November 14, 2012 Author Share Posted November 14, 2012 The pin im using just now is easily removeable mate and i thought about using a nut and bolt just wanted to see if anyone had the pin lying about lol. If need be though ill just have to use that. Quote Link to post Share on other sites
Bryan-4E-FTE Posted November 24, 2012 Share Posted November 24, 2012 (edited) I got the same problem.Got a new engine.A new CT9 turbo ( not rebuilt but really new ).A new HKS actuator.Got full boost about 3500 - 4000RPM.i wanted to be stock so i made a T piece betweeen the hose between the turbo and actuator to make the hi/lo button work.Now i dont want it anymore so i did the bypass as we all know.Still i got the boost problem.Dont have a boostgauge , only the three lights on the dash.Can upload a little clip tomorrow Edited November 24, 2012 by Bryan-4E-FTE Quote Link to post Share on other sites
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