overboosting
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11 February 2015, 12:54 PM
#19
Scooby Regular
i cant remember the exact figures, but when i asked the question myself, the standard ecu can only see up to a certain level of boost, you don t want to go above that because it wont know what the boost is doing and may not add enough fuel. So to stay safe it need to be set the target lower than than to allow some head room for overboost.
if that makes sence at all lol
if that makes sence at all lol
11 February 2015, 04:25 PM
#22
11 February 2015, 06:13 PM
#24
Gasket? Very very unlikely to be leaking, has mine appart more times than I can remember, never a problem.
A leak will not cause overboost anyway, very much the opposite.
Perhaps you have interfered with boost control pipe work though?
A leak will not cause overboost anyway, very much the opposite.
Perhaps you have interfered with boost control pipe work though?
Last edited by boosted; 11 February 2015 at 06:16 PM.
11 February 2015, 06:31 PM
#27
Scooby Regular
All because my cheap MBC jammed as stupidly Id had fitted while waiting for my new WGA with adjustable spring tension to arrive from Kinguwa.
Do yourself a favour and check that the WG actuator is still opening smoothly, you need to get an air line on it with about 1 bar. If it does not move , you found your problem.
11 February 2015, 06:36 PM
#28
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[*] Mine drove fine too untill my boost gauge alarmed at 2.0 bar and flew round to >2.5bar and something just went tack tack tack up front. All because my cheap MBC jammed as stupidly Id had fitted while waiting for my new WGA with adjustable spring tension to arrive from Kinguwa. Do yourself a favour and check that the WG actuator is still opening smoothly, you need to get an air line on it with about 1 bar. If it does not move , you found your problem.
All because my cheap MBC jammed as stupidly Id had fitted while waiting for my new WGA with adjustable spring tension to arrive from Kinguwa. Do yourself a favour and check that the WG actuator is still opening smoothly, you need to get an air line on it with about 1 bar. If it does not move , you found your problem.
11 February 2015, 07:30 PM
#29
Scooby Regular
Whatever , it should open smoothly and as you cannot watch it while you drive you should test it statically, as they can jam. its also worth to take a look to check that you have 3mm of pretension on the WG rod , otherwise the WG will open later than you wish if the arm is too tight or you lent hard on the mount bracket while fixing something else ?
WGA opening rate ultimately depends on what engine /turbo/ BC system you have and if you previously did anything to improve boost control on a WGA.
I found on the 2 port STD boost solenoid for control that I could not even make target boost with the WGA that came on the New Turbo.
So If you are aiming to reach 1.65 bar then you either need a 3 port system or you probably need a spring rated at least 0.8 bar to avoid the WGA opening prematurely on a 2 port , (which kills your low rev range torque) That's why Kinugawa do a range of springs to fit. ( Rated at WG opening 1mm add 0.3bar for 5mm opening ) ,
I found I can use the 0.8 or 1.0 bar spring ok but the one rated 1.2 bar tends to overboost a little for my 1.5 bar target on a ported TD05 16G.
Now that I explained at that It will probably be something completely different , but at least you would have killed some time
11 February 2015, 07:41 PM
#30
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That's probably fine for yours "starting to open" on a 2 port system, and unless you have a forged engine I imagine your aiming at considerably less than his 1.65bar ? Whatever , it should open smoothly and as you cannot watch it while you drive you should test it statically, as they can jam. its also worth to take a look to check that you have 3mm of pretension on the WG rod , otherwise the WG will open later than you wish if the arm is too tight or you lent hard on the mount bracket while fixing something else ? WGA opening rate ultimately depends on what engine /turbo/ BC system you have and if you previously did anything to improve boost control on a WGA. I found on the 2 port STD boost solenoid for control that I could not even make target boost with the WGA that came on the New Turbo. So If you are aiming to reach 1.65 bar then you either need a 3 port system or you probably need a spring rated at least 0.8 bar to avoid the WGA opening prematurely on a 2 port , (which kills your low rev range torque) That's why Kinugawa do a range of springs to fit. ( Rated at WG opening 1mm add 0.3bar for 5mm opening ) , I found I can use the 0.8 or 1.0 bar spring ok but the one rated 1.2 bar tends to overboost a little for my 1.5 bar target on a ported TD05 16G. Now that I explained at that It will probably be something completely different , but at least you would have killed some time