Anyone running Alpha 28's on a built engine...I am having trouble keeping high boost - 6SpeedOnline

Jun 5, 2012 | 10:22 AM

bad107

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Anyone running Alpha 28's on a built engine...I am having trouble keeping high boost

Anyone with a built motor running high boost on alpha 28s? I am having trouble keeping over 1.5 bar and wondering if that is causing the issue or the turbos can simply not flow enough air into a 3.8 liter engine to keep the high boost.

I will try Markski's idea of strapping an eBay 30 PSI manual boost controller on to check when I get time.

Thanks!

Jun 5, 2012 | 12:08 PM

Mark @ AIM Performance

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Quote:

Originally Posted by Tony@epl

On the 30's you can hold 2.0 bar.

How do you know ?

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Jun 5, 2012 | 01:15 PM

bad107

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Quote:

Originally Posted by Tony@epl

You should be able to hold 1.7-1.8 bar no problem. On the 30's you can hold 2.0 bar.

Tial is coming out with uprated wastegate can for high boost.... Im told it should be out soon.

Yes but 1.5 bar actuators are not practical unless all you do is run race gas or spray meth

Jun 5, 2012 | 02:47 PM

markski@markskituning

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and you did not have the issue running a Greddy EBC... thus something is off... maybe the hks EBC...

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Jun 5, 2012 | 02:49 PM

bad107

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Quote:

Originally Posted by MARKSKI@911tuning

and you did not have the issue running a Greddy EBC... thus something is off... maybe the hks EBC...

luckily the guy i sold my greddy to said i could keep it for a few more days...going to have my shop hook up the greddy (just running wires outside of car) and put it on the dyno to see if the EBC is causing this nonsense.

Jun 5, 2012 | 08:39 PM

Tim941NYC

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You are going backwards dude.. A28's on a 3.8?? you were using a gt30 before right? with external wastegates??

Jun 5, 2012 | 08:57 PM

ItGuy996

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Quote:

Originally Posted by Tim941NYC

You are going backwards dude.. A28's on a 3.8?? you were using a gt30 before right? with external wastegates??

Looking at compressor maps I would agree.

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Jun 5, 2012 | 10:03 PM

bad107

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I had some billet 3071 w oem modified headers I nevrr installed and just sold. I am putting a pair of alpha 3076s on. I am just running a new oem fuel pump with booster Bosch for now. I will see when I need to go dual in tank bosch.