uestlove Posted December 9, 2008 Share Posted December 9, 2008 hey guys, Cliff notes: Stock turbos, dump pipe, metal cat, cat back, trust intercooler Bought car, boost spiking to 2 bar. Figured out Jap guys disconnected something from wastegate. fixed it, but still spiking to 1.7bar Fitted HKS EVC6 boost controller..did nothing bought power fc and tuned it still hitting 1.7 bar and maxing injectors out so put 2.5 restrictor in exhaust before and after cat, car is a bit laggier but boost gauge is showing 1.4bar..and engine light coming on borrow hand controller off friend..knock is at 10 but injector cycle at 100%! After we put restrictor in, didnt retune it, if i get it tuned again will this help? Thinking get some timing pulled out and hopefully tuner can control boost..fucking hell everytime im ready to hit the track a problem arises. Should i put a 3" restrictor ring? I have read heaps of threads here, alot of info, but can you please comment on my situation thanks. Cheers Quote Link to comment Share on other sites More sharing options...
tooquicktostop Posted December 9, 2008 Share Posted December 9, 2008 2 bar on stock turbos, very suprised it did not go bang You have to get the boost issue sorted before you drive it again Have you read the BPU info Quote Link to comment Share on other sites More sharing options...
Thorin Posted December 9, 2008 Share Posted December 9, 2008 (edited) Are you hitting 1.4 bar with the boost controller turned off? (A boost controller can only raise the boost, not lower it below what it's producing without) If you are then you need a smaller restrictor ring, not larger. I too am surprised it hasn't blown up. edit: reading again it sounds like you have 2 restrictor rings fitted, you only need 1! I'm also curious what this thing is that was "disconnected from the wastegate". As the stock turbo's have an internal wastegate I'm guessing you're meaning something else. Edited December 9, 2008 by Thorin (see edit history) Quote Link to comment Share on other sites More sharing options...
Thorin Posted December 9, 2008 Share Posted December 9, 2008 Hang on a minute, do you still have the cats in? Just one cat is still enough of a restriction to not need a restrictor ring. Do you in fact have a bleed valve or similar raising the boost mechanically? Quote Link to comment Share on other sites More sharing options...
bignum Posted December 9, 2008 Share Posted December 9, 2008 Or pipe off/leak to the wastegate actuator? Quote Link to comment Share on other sites More sharing options...
uestlove Posted December 9, 2008 Author Share Posted December 9, 2008 hey guys, yeas i still have the cat, but its a hi flow metal cat. Not restrictive at all. Its the mid cat? The one that sits in t he middle of the car. Thorn not sure what they broke, my mechanic fixed it, something on the actuators maybe?? Also yeah 2 rings one before the cat and after. They are 2.5". Going to drop them down to 2.45" Quote Link to comment Share on other sites More sharing options...
uestlove Posted December 10, 2008 Author Share Posted December 10, 2008 Anyone got a pic of the Chris wilson downpipe ??? My exhaust guy is going to create a taper from the top ofthe dump, this should help? The restrictor i used was just a 2.5" gasket...this could have broke? Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted December 10, 2008 Share Posted December 10, 2008 Try a 2" restrictor plate in there, you'll only need 1 though. Does sound like you have another problem though, even with it fully decatted it wont run 2 bar boost! Check all the wastegate pipes for leaks first off. Quote Link to comment Share on other sites More sharing options...
uestlove Posted December 10, 2008 Author Share Posted December 10, 2008 Thanks Paul, its not running 2 bar anymore that issue was fixed. Its now holding 1.4bar. Quote Link to comment Share on other sites More sharing options...
Paul Whiffin Posted December 10, 2008 Share Posted December 10, 2008 How was the issue fixed though? By putting a 2.5" restrictor in there? I'd try a 2" restrictor first off and go from there. If it was fully decatted it should run about 1 bar with a 2" restrictor. Ta Quote Link to comment Share on other sites More sharing options...
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