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how do you adjust turbo boost on an AAZ?
by
wiener
on 07 Jul, 2011 13:14
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How do I adjust the boost on my 94 1.9 TD with an AAZ engine?
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#1
by
R.O.R-2.0
on 07 Jul, 2011 13:24
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you need a boost controller.
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#2
by
rwdriver
on 07 Jul, 2011 14:58
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you can just ajust the rod at the back of the turbo. The closer the wastegate arm is to the end of the shaft, the more boost.
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#3
by
R.O.R-2.0
on 07 Jul, 2011 15:33
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you can just ajust the rod at the back of the turbo. The closer the wastegate arm is to the end of the shaft, the more boost.
thats not a very accurate way of adjusting it tho, you can go overboard really easy that way..
boost controllers are cheap, reliable, and EASY TO USE..
some you can adjust on the fly while in the car..
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#4
by
dieselweasel
on 08 Jul, 2011 10:15
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Your '94 should have a K14 turbo, so there's no external wastegate arm. Look for the wastegate canister, loosen off the nut (10 mm IIRC), and turn the screw in for more boost. I turned mine in all the way then backed it off about 1/4 turn and rarely see in excess of 15 psi. A boost controller would work too
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#5
by
R.O.R-2.0
on 08 Jul, 2011 10:20
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Your '94 should have a K14 turbo, so there's no external wastegate arm. Look for the wastegate canister, loosen off the nut (10 mm IIRC), and turn the screw in for more boost. I turned mine in all the way then backed it off about 1/4 turn and rarely see in excess of 15 psi. A boost controller would work too
there again, not a very accurate way to adjust boost..
you might turn it a couple turns, and see a couple PSI boost, but then thread the wastegate adjustment in a couple more turns, and your up over 20 psi..
boost controllers are cheap, and adjusted much easier.. 1 turn on the boost controller knob = 1 psi more boost..
boost controllers work better than adjusting the wastegate, and make the turbo spool quicker.. it holds the wastegate closed until a set pressure, then POPS it open quickly..
a normal wastegate starts opening before the max boost is reached.. makes for longer spool up times..
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#6
by
R.O.R-2.0
on 08 Jul, 2011 12:20
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and for gods sake, you can build your own boost controller if you arent a total dur-de-dur... for atound $5..
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#7
by
wiener
on 14 Jul, 2011 02:52
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I guess it is a K04,with more fuel and no governor how much boost will I get?
And thanks guys.
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#8
by
Alcaid
on 14 Jul, 2011 05:50
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and for gods sake, you can build your own boost controller if you arent a total dur-de-dur... for atound $5..
And for the lazy ones, they can be bought for 20 bucks
Ebay search: nxs boost controller
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#9
by
R.O.R-2.0
on 14 Jul, 2011 09:12
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I guess it is a K04,with more fuel and no governor how much boost will I get?
And thanks guys.
someone upgraded it at sometime then. they came stock with a K03, witch looks very similar to the k04.. sure its not a K03?
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#10
by
wiener
on 16 Jul, 2011 01:20
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Sorry I meant K14. It has a screw with a locknut
I can hit 25 lbs boost sometimes but boost often drops from 15--20 lbs. to 10 lbs,any ideas?
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#11
by
R.O.R-2.0
on 16 Jul, 2011 11:17
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Sorry I meant K14. It has a screw with a locknut
I can hit 25 lbs boost sometimes but boost often drops from 15--20 lbs. to 10 lbs,any ideas?
HOLY CRAP! your gonna kill that poor turbo!
20 is all the more those turbos are happy making..
it gets boost spiking because you didnt get a boost controller. thats exactly what it does when its cranked up too far..
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#12
by
wiener
on 16 Jul, 2011 22:57
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Cool I will get one soon. Can I run 20lbs boost safely?
What would your choice for an upgrade on the turbo?Am planning on FMIC too
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#13
by
R.O.R-2.0
on 18 Jul, 2011 10:21
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Cool I will get one soon. Can I run 20lbs boost safely?
What would your choice for an upgrade on the turbo?Am planning on FMIC too
NO.. 20psi is not safe with that turbo. its just a hot air pump at that point. 15 psi is all the more boost these turbos are happy making..
the engine will gladly take 20 psi all day long, but the turbo wont happily supply it..
good luck trying to return the wastegate back to its stock setting..
(unless you counted the amount of turns you screwed that screw in)
its not gonna regulate boost very good now that you altered the spring tension in the wastegate. its gonna be erratic/spikey at best, but you already figured that out..
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#14
by
wiener
on 21 Jul, 2011 01:30
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sometimes I learn the hard way