How to ensure wastegates are properly adjusted
#1
09-10-2010, 10:35 AM
Join Date: Dec 2006
Location: Phoenix, Arizona
Age: 49
Posts: 653
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How to ensure wastegates are properly adjusted
As the title states, I'm looking for info on how to verify that my wastegate adjustement is appopriate. I've seen posts indicating that if they are set too soft, performance can suffer even though the car is making full boost and is running fine. Just curious, since this is something I've never checked or even thought much about, and every stock 996tt I've ever driven seems to be just about as fast as my epl flashed k16 car (with speedtech exhaust, gt2 ic's, k&n drop in fitler, evo dv's and now stock 18's).
Thanks, Scott.
Thanks, Scott.
#3
09-10-2010, 11:29 AM
The only way to do this properly is to actually calibrate them.
You can search on this site but here is a quick recap:
You can search on this site but here is a quick recap:
plenty of threads about this but in a nutshell you put a small hand operated pump hooked to the wastgate, with a ACCURATE guage, then put a dial indicator on the rod end, for a good start on a k24 car you want the rods to move about .005" when ur guage hits 11 psi...that should put u at about 1.1-1.2 bar, do each WG seperately then drive, check boost and repeat adjustment up or down as needed..I run 12.5 psi and make 1.3-1.35 bar
Oh BTW before u move it at all check what pressure u open at,as then u have a really good baseline as to what pressure will produce what bar boost.
Oh BTW before u move it at all check what pressure u open at,as then u have a really good baseline as to what pressure will produce what bar boost.
#4
09-10-2010, 12:47 PM
Basic Sponsor
pressurize the WG.... see at what psi it starts to crack open...
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2001 996TT 3.6L and stock ECU
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
#5
09-10-2010, 01:35 PM
Measuring the nut distance is ineffective and imprecise.
Measuring 0.005" with a dial indicator is unnecessarily precise.
With your finger you can feel when they crack lose.
Search is a friend...
A
#6
09-10-2010, 03:42 PM
Join Date: Dec 2006
Location: Phoenix, Arizona
Age: 49
Posts: 653
Rep Power: 68
Thanks guys. I did search and saw many threads about adjusting the wg's with a pressure tester, but didn't know if there was a quick and easy way to tell if something is amiss or not.
What are you guys using to test the pressure? Where would I buy the tool? Thanks!
What are you guys using to test the pressure? Where would I buy the tool? Thanks!
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#8
09-10-2010, 09:06 PM
I built mine out of an air pressure regulator and a brass "T" block with a gauge on it. The "T" contains the regulator output, the gauge and the wastegate actuator.
IT takes about 50.00 to set it up with a decent regulator, your regulator on your air compressor *MIGHT* do it, but it'll be hard to get real fine adjustment without stepping the pressure down twice. Sears will have a pressure regulator as will *most* places that sell paint or pneumatic equipment.
IT takes about 50.00 to set it up with a decent regulator, your regulator on your air compressor *MIGHT* do it, but it'll be hard to get real fine adjustment without stepping the pressure down twice. Sears will have a pressure regulator as will *most* places that sell paint or pneumatic equipment.
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