So I have a new set of gr600r turbos and the otherday I ran the car up to almost redline in 2nd to check what is was boosting to. It peaked at 18psi. I stopped driving like that immediately. (as I have stock injectors so would be very very lean) Now I have no boost jets, no controller and no boost solenoids. Just a line straight from inlet pipe to the waste gate. I thought it must be a connection had fallen off or something like that but they are fine. So to check I plugged up the compressor and sure enough they open, but not until about 18psi. This kit should be opening at 12psi to 14psi. So is the only way to fix this with new waste gate actuators? I haven't taken it for a run without the solenoids yet but will do that this afternoon as I am in the middle of fitting some subframe spacers. I'll let you know how I go. But in the meantime if anyone has any ideas how to get it down to 14psi that would be good. As I want to run it at heathcote this Sunday. Ps it used to boost perfectly to 14psi with the stock turbos before I fitted the kit.
Sounds like you've got 18lb springs.... in your new actuators. That means the MINIMUM boost you can run is 18psi Big turbos + 18psi + oem injectors =
Ur actuator arms should be adjustable. They might be set at 18psi from factory? You can alter the length of the arm and have them open earlier.
If it's non adjustable for some reason, you can sometimes have a bit of adjustment if you bend the actuator bracket towards the wastegate a bit to releave some of the spring pre-tension. (probably a last resort, but may give you some relief till you get bigger injectors).
yes you are right They are adjustable. But the problem is if they are lengthened this would push the waste gate open all the time, and therefore make no boost (or not much) The wate gate doesn't even begin to move until nearly 18psi where they then open fully. I thought it may be the springs. Not happy now as the drivers side would be impossible to change with engine in. Time for bigger injectors then I think
to much boost is not good for you remember this guys???http://www.youtube.com/watch?v=N-y5AcW7FLk:rofl:
Right foot will have to be restrained The only reason I tested it at WOT was so that if I am overtaking and not looking at the gauge that I didn't damage the engine. So I'll take it easy till new injectors or controller. I am thinking Injectors as the controller will nearly cost as much as a set of Jecs from COZ. Ps think that second or so of boost has done some damage as I did a compression check and all cyls are between 135 and 145. They were 150 last time I checked. But I didn't warm the engine much this time. SO a full rebuild may need to be done soon
Yes, but if the arms are wound out past the stock setting already, it will cause the waste gates to stay closed for longer as the spring tension will be increased. Correct me if I'm wrong? Hence wind the actuator arms back in a little, it'll drop the psi... The waste gates won't necessarily be open all the time. The spring tension will decrease and the gates will open at lower psi.
Fixoided!!! Some great news. I just took it for a run with the boost solenoids removed and it boosted perfectly to 13 psi. Love love love. Runs nice. In fact. I would say it is running the best it ever has. And the spacers in the subframe really do stop axle tramp there was none of this :br: even with rubbish nangkangers on the back. It just gripped and went. LOVELY :zlove: Ps Raheen if you read this your SMIC are way good and thanks for the bonus ducts.
No, it would do the opposite..... Winding the adusters on the arms to lengthen them would force the wastegates open.
Nope. The actuators should always stay pre-tentioned to some point. This pre-tention level will vary depending on what spring rate/PSI level the actuators are set as. So you have a "little" bit of adjustment there. Loosening the actuator arm pre-tention a little won't force them open, they'll just have less "closing force" on them - decreasing the PSI level before they want to start springing open. (obviously if you wind them waaay down, you'll be going beyond the spring pre-tention level and letting them freely flap open though. Everything in moderation)
Of course in moderation. But as mentioned, u can alter the actuator arm length to increase/decrease the psi the actuators open at by as much as 3psi so I have read.
