Jesse Williams_49219 Member 26 Member For: 12y 9m 9d Posted 28/04/14 03:15 AM Share Posted 28/04/14 03:15 AM Recently upgraded from the standard 35/40 to a GTX3582, I've got all supporting mods:1000hp Plazmaman intercooler4 inch intake, 3 1/2 dump with separate 1/2 wastegate pipe into gutted 3 1/2 cat and exhaustPlazmaman hot side pipingEither a 10 or 12 psi actuator (I don't remember which one).The turbo spools and generates 25psi easy, but drops straight down to 18psi and stays there.Before gutting the cat it did the same as above but only sustained 17psi and 491kw rather than the 18psi and 495 now.My tuner believes I may be lifting the head slightlyBut others believe the actuator is too weak.Any info would be appreciated Link to comment Share on other sites More sharing options...
Trent0 The Toxic Rocket Donating Members 574 Member For: 14y 8m 27d Gender: Male Location: Brisbane Posted 28/04/14 06:23 AM Share Posted 28/04/14 06:23 AM factory boost controller? Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 7m 24d Gender: Male Location: @ my laptop Posted 28/04/14 06:52 AM Share Posted 28/04/14 06:52 AM that will make no difference Link to comment Share on other sites More sharing options...
Trent0 The Toxic Rocket Donating Members 574 Member For: 14y 8m 27d Gender: Male Location: Brisbane Posted 28/04/14 07:12 AM Share Posted 28/04/14 07:12 AM Good input 2 Link to comment Share on other sites More sharing options...
barnz Member 3,047 Member For: 11y 2m Gender: Male Location: Brisbane Posted 28/04/14 07:27 AM Share Posted 28/04/14 07:27 AM Seems like pretty good power for a 3 1/2 exhaust and gutted cat? Most people at 500kw are running bigger. Alot for a stock bottom end aswell. Link to comment Share on other sites More sharing options...
Jesse Williams_49219 Member 26 Member For: 12y 9m 9d Posted 28/04/14 07:31 AM Author Share Posted 28/04/14 07:31 AM The motors built, has a big fuel system and plenum etc etc. Everything I listed was all I could think that was relevant.My tuner believes that 3 1/2 should suffice Link to comment Share on other sites More sharing options...
unclewal Donating Members 583 Member For: 14y 4m Posted 28/04/14 07:45 AM Share Posted 28/04/14 07:45 AM gotta be the waste gate not being able to hold pressure, my gtx was hard to get under 18psi Link to comment Share on other sites More sharing options...
Kosij Donating Members 2,045 Member For: 13y 5m 10d Gender: Male Posted 28/04/14 08:52 AM Share Posted 28/04/14 08:52 AM To much back pressure. Link to comment Share on other sites More sharing options...
Kroozin Menace Donating Members 1,990 Member For: 13y 8m 30d Gender: Male Location: Sydney Posted 28/04/14 10:59 AM Share Posted 28/04/14 10:59 AM Did you try disconnecting the wastegate hose?If your game you could probly shine a torch down and look at the act. arm while he's running it up on the dyno to see if the arm moves at all.. Or Remove O2 sensor and basterdize another o2 sensor to take a hose to run to a gauge to check for high back pressure. If your going to run it to a normal boost gauge I've heard of ppl running the exh. pres. thru a copper tube/pipe 1st to take some of the heat so ya don't f*ck ya gauge... however the bloke with the dyno should have the appropriate sh*t to do it too 1 Link to comment Share on other sites More sharing options...
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