boost levels
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Senior User
Joined: May 2006
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From: dryden,michigan
boost levels
soo this motor should handle 12 psi safelty?? and what do i have to do to get 12 psi outta my turbo?? i need to just adjust the wastegate lever?? turn it in ??? and how much heat like 1100 dagreees? is that safe or what?? i just need a little more info what does that line that runs from the wastegate hose do? its a rubber hose that runs from the waste gate to somthing
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Joined: Nov 2003
Posts: 21,285
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From: Nutter Fort, WV
You should be fine at 12 PSI.
Make the rod shorter increases the boost, usually about 2 turns per PSI increase.
First make sure the rod into the wastegate chamber does not turn, the chamber diaphram will be torn if it does which ruins the chamber.
Loosen the locknut on the arm.
You need to remove the E clip that holds the rod onto the wastegate arm.
The wastegate rod is spring loaded, so it does take some pressure to remove and replace the wastegate rod.
Turn the clevis part of the rod while holding the rod with vice grips.
Reinstall the rod onto the arm.
Test drive at wide open throttle watching the boost gauge.
Max boost will be at the upper RPM of the engine.
Piston damage starts at 1250 degrees.
Keep the EGT under 1200 if your thermocouple is in the exhaust manifold.
Keep it under 900 if it is after the turbo.
The line to the wastegate chamber from the pressure chamber is where the wastegate gets the boost pressure from.
That pressure overpowers a spring to open the wastegate.
Make the rod shorter increases the boost, usually about 2 turns per PSI increase.
First make sure the rod into the wastegate chamber does not turn, the chamber diaphram will be torn if it does which ruins the chamber.
Loosen the locknut on the arm.
You need to remove the E clip that holds the rod onto the wastegate arm.
The wastegate rod is spring loaded, so it does take some pressure to remove and replace the wastegate rod.
Turn the clevis part of the rod while holding the rod with vice grips.
Reinstall the rod onto the arm.
Test drive at wide open throttle watching the boost gauge.
Max boost will be at the upper RPM of the engine.
Piston damage starts at 1250 degrees.
Keep the EGT under 1200 if your thermocouple is in the exhaust manifold.
Keep it under 900 if it is after the turbo.
The line to the wastegate chamber from the pressure chamber is where the wastegate gets the boost pressure from.
That pressure overpowers a spring to open the wastegate.
Laughing Gas
Joined: Aug 2003
Posts: 919
Likes: 4
From: Newberg Oregon
Originally Posted by bio-d
I'm getting 8psi @3000 rpm on my 87 with wastegated ATS. Will increasing it to 12 psi decrease my gas mileage? ( assuming I don't get carried away with the increased power).
Mike
Mike
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