rb25 boost creep issue

[ShaneO'F]

maybe a silly question now but would an elbow with a screamer pipe vent the gasses quicker to the atmosphere than it would through the exhaust giving the natural back pressure that wud already have?.

[gem-s13]

maybe a silly question now but would an elbow with a screamer pipe vent the gasses quicker to the atmosphere than it would through the exhaust giving the natural back pressure that wud already have?.

Not realy at that sort of boost. id be 90% sure that its just the actuater wound up to much if you say its not fouling the elbo. losen it off untill the wastegate arm is rattling then half a turn drive it if goes over 1bar if it does its something else. if doesnt over boost bring it back half turns until stays at .8 dont go over unless ur mapping it propperly

also get a new peice of pipe to run to the actuator so you nk there is no restrctors in it. and is it comeing from the turbos compressor housing to actuator or from an intercooler pipe?

[paulr5]

If its not fouling and your plumbing to and from is as direct as possible to the actuator controler I would say its a flow issue as in the waste gate port won't allow the flow trough. you will have to take off the ex housing and cnc or grind out the actuator port out that extra bit or go external gate.

[ShaneO'F]

Not realy at that sort of boost. id be 90% sure that its just the actuater wound up to much if you say its not fouling the elbo. losen it off untill the wastegate arm is rattling then half a turn drive it if goes over 1bar if it does its something else. if doesnt over boost bring it back half turns until stays at .8 dont go over unless ur mapping it propperly

also get a new peice of pipe to run to the actuator so you nk there is no restrctors in it. and is it comeing from the turbos compressor housing to actuator or from an intercooler pipe?

At the minute ya the actuator vacuum is straight from the turbo housing.. I only found out last nite coz I text the lad I got it off, I asked him what the actuator is set up for when I baught it, he said 1.4bar, but last nite I text him to see was it boost creeping with him and he said no, but also that he had an electronic boost controller, so the actuator could be set up all wrong.. im away and wont be at the car til Friday nite so ill play with the actuator then, presumably longer leg is more boost? coz when I drove it sunday nite I wound it back 4 full turns, made it shorter, and twas the same almost, and that was the me pulling the leg about 5mm to the wastegate leg, twas tight enough to pull up.. so u recon shorten it more?