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Cant get over 14psi.

Old 09-15-2018, 10:01 PM
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Default Cant get over 14psi.

Brand new efi ebc. Verified all houses and connections are tight, no boost leaks felt. What else could it be?
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Old 09-15-2018, 11:34 PM
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Can you hear it pulsing? Go into the test modes and set it to pulse at various duty cycles. Then, try blowing through it. It should change in difficulty depending on the duty cycle.
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Old 09-16-2018, 12:12 PM
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Yes, ebc is doing its job. I pulled the vacuum line from the wastegate and it still wont go over 14ish psi.
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Old 09-16-2018, 12:18 PM
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What kind of Turbo?
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Old 09-16-2018, 12:27 PM
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Ebay mk turbo
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Old 09-16-2018, 01:06 PM
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Set boost cut to 16psi and wire the wastegate shut. Do a pull and see if you hit boost cut.
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Old 09-16-2018, 02:19 PM
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That was it, wastegate is ****. So, what's a good replacement?
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Old 09-16-2018, 03:06 PM
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Originally Posted by levnubhin View Post
That was it, wastegate is ****. So, what's a good replacement?
a real Garrett one.
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Old 09-16-2018, 04:15 PM
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What happens if you increase preload? Does that help it seal better?
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Old 09-16-2018, 08:52 PM
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Probably would but it's already preloaded as much as it should be. I ordered a turbo turbosmart wastegate so I'll just wait for it to come in.
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Old 09-16-2018, 09:17 PM
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I'm looking for answers, too. I can't get over 18psi.

He's such a heartbreaker.
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Old 09-16-2018, 09:45 PM
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Couldn't it also be a boost leak?
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Old 09-17-2018, 02:42 AM
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Are you on wastegate pressure or are you using an EBC or MBC?

Originally Posted by Chiburbian View Post
Couldn't it also be a boost leak?
Isn't that basically what happens when a wastegate doesn't seal properly?
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Old 09-17-2018, 02:54 AM
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Boost leak is in between the turbo pressure outlet and the inlet valves.

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Old 09-17-2018, 01:52 PM
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From my experience you'll pop that turbo running it much over 10 psi. I got a couple dead ones under my belt trying to run them at 15 psi.
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Old 09-17-2018, 04:12 PM
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Time to get a big boy turbo ( IE : something thats not EBAY )
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Old 09-17-2018, 04:27 PM
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Originally Posted by andyfloyd View Post
Time to get a big boy turbo ( IE : something thats not EBAY )
Yeah cause genuine garrett turbine housings are known for allowing consistent boost in stock form.

He simply doesn't have enough spring pressure. On a single port actuator like this you can get between 150-200% the spring pressure. That's all you'll ever get name brand or not.
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Old 09-17-2018, 04:31 PM
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Originally Posted by SpartanSV View Post
Yeah cause genuine garrett turbine housings are known for allowing consistent boost in stock form.

He simply doesn't have enough spring pressure. On a single port actuator like this you can get between 150-200% the spring pressure. That's all you'll ever get name brand or not.
Mine seems to hold 17psi to redline on a puny GT2560 so.....hmmm. Also the garrett turbos are the REAL ones not the cheap copies.
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Old 09-17-2018, 04:39 PM
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Originally Posted by andyfloyd View Post
Mine seems to hold 17psi to redline on a puny GT2560 so.....hmmm. Also the garrett turbos are the REAL ones not the cheap copies.
Which means nothing without knowing the spring pressure. I'd bet it's at least a 10psi spring.

My comment about garrett turbine housings was because most people seem to have to port them to avoid overboost just like people running the chinese copies have to.
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Old 09-17-2018, 04:51 PM
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Originally Posted by SpartanSV View Post
Which means nothing without knowing the spring pressure. I'd bet it's at least a 10psi spring.

My comment about garrett turbine housings was because most people seem to have to port them to avoid overboost just like people running the chinese copies have to.

Its a 12psi spring, which is why it can hold decently. Still though, The ebay stuff is inferior but to each their own. And yes, I did port my housing lol.
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