STD Maintenance General Boost pressure 8.5 PSI, how do I increase?

Boost pressure 8.5 PSI, how do I increase?

Boost pressure 8.5 PSI, how do I increase?

 
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tazulica
Naturally-aspirated

6
10-25-2012, 09:11 PM #1
My engine is pulled from a '79 300SD. Today I installed a new boost gauge and the maximum pressure read is 8.5 PSI. I removed the ALDA seal and turned the screw 1 1/2 CCW until it stopped (it wouldn't turn more than that).
I drove the car again and the boost is the same. Is there any other way to increase it another 3-4 PSI?
Thanks!
tazulica
10-25-2012, 09:11 PM #1

My engine is pulled from a '79 300SD. Today I installed a new boost gauge and the maximum pressure read is 8.5 PSI. I removed the ALDA seal and turned the screw 1 1/2 CCW until it stopped (it wouldn't turn more than that).
I drove the car again and the boost is the same. Is there any other way to increase it another 3-4 PSI?
Thanks!

aaa
GT2256V

913
10-25-2012, 11:15 PM #2
Pinch the wastegate hose shut as a test for whether the wastegate needs adjusting.
aaa
10-25-2012, 11:15 PM #2

Pinch the wastegate hose shut as a test for whether the wastegate needs adjusting.

sassparilla_kid
diesel > all other fuels

1,618
10-26-2012, 01:43 AM #3
You could try using a manual boost controller like this

http://www.ebay.com/itm/NXS-MANUAL-BOOST...ae&vxp=mtr

-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
sassparilla_kid
10-26-2012, 01:43 AM #3

You could try using a manual boost controller like this

http://www.ebay.com/itm/NXS-MANUAL-BOOST...ae&vxp=mtr


-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!

 
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