How do 3rd gen wastegates work exactly?
03-08-2008, 06:55 AM
#16
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no thanks. that makes sense.we should still be able to put a orifice, .22shell or boost elbow in our neprene hoses to the wastegate though to create more boost right?
03-08-2008, 02:23 PM
#17
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Pretty simple really, an electronic pulse-width modulated solenoid controlling the drive-pressure-reading wastegate actuating diaphragm... gives a lot better tuning of boost pressure in relation the fuel map in the ECM.
Why would you want to mechanically alter the wastegate setting when Holset has conveniently made it possible to easily adjust in real time through the computer?
Why would you want to mechanically alter the wastegate setting when Holset has conveniently made it possible to easily adjust in real time through the computer?
03-09-2008, 01:16 AM
#20
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Tree Doc, boost fooling and wastegate controlling are two different things. Sally man want's more boost to control his egt's. Sallyman, I bought a manual boost controller off ebay for 13 bucks shipped to my door. I have the same turbo as you and I am fighting the wastegate a little too. My controller just came in the mail this afternoon but it looks good. I priced out the parts to make my own and just the brass fittings came out to 15 bucks.
Check it out here:
http://cgi.ebay.com/ebaymotors/NXS-M...spagenameZWDVW
I'll let ya know how it turns out.
You'd just need to buy 2' 1/4"fuel hose line at pepboys or buy some silicone tubing online so you can run the controller in a convenient location for adjustment.
Check it out here:
http://cgi.ebay.com/ebaymotors/NXS-M...spagenameZWDVW
I'll let ya know how it turns out.
You'd just need to buy 2' 1/4"fuel hose line at pepboys or buy some silicone tubing online so you can run the controller in a convenient location for adjustment.
03-09-2008, 08:23 AM
#21
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on the controlling egt's with more boost issue..
On a stock 35 isn't that much boost getting out of the turbos efficiency range and just gonna start circulating warm air?
On a stock 35 isn't that much boost getting out of the turbos efficiency range and just gonna start circulating warm air?
03-09-2008, 08:27 AM
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You can squeeze a little more out of them before the efficiency falls off. They still cool very well at 40psi.
03-09-2008, 08:33 AM
#23
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well then im safe. because i only get 23 lbs max and if i pinchline i can hit 40 easy. so as long as i modulate my foot and watch turbo psi ill be ok.
gauges are on the way
gauges are on the way
03-09-2008, 08:39 AM
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So you'r trying to control at what psi the waste gate opens not the over all boost psi? I guess if you didn't want to vary the point or what psi the waste gate opened you'd only have to adjust the length of the arm that opens the waste gate. The boost psi pushes on the diaphram connected to the adjustible arm and opens the waste gate. Shorten the arm and it take more psi before the arm will be moved and open the waste gate. So you'd have more boost sooner but not more overall psi. I did mod my waste gate and John at Floor It noticed it right off that boost built a lot quicker.
03-09-2008, 08:42 AM
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oh yes. i wouldnt keep my turbo over 40 psi at all. i let off the pedal before i see 39 even. all i was doing was testing things out. is it true that any psi over 32 psi is useless to us because turbo is out of its efficiency range then?
03-09-2008, 08:48 AM
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You can push them a lot higher than 40psi without much risk of the turbo having problems. It's not like the they will explode just because you hit 45 or 50psi for a few seconds. At that point it's the drive pressures that become more of a problem than anything.
03-09-2008, 11:01 AM
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calm down settle down. im not fighting it. calm down. gauges are on the way. i was just wondering why some are saying its useless to build over 32 psi boost on stock turbo. Why does stock 3rd gens hit 35 psi then without mods? with mods i can hit 25 only and by pinching it i can hit 40 easily and yes egts are betetr. i know what my problem is now anywyas. its injector related at higher load/rpms. but by slamming more air in from turbo it is helping egts but not lots.
03-09-2008, 11:12 AM
#29
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Sally, there was a post a coulple of days back in regards to the capabilities of a stock turbo. If I remember correctly the stock turbo can flow at a rate of 62 ft lbs per minute far exceeding the 40 we can hit with a closed wastegate. The statement was from Cummins directly. I will try to find and post.
03-09-2008, 11:20 AM
#30
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If on a 04.5 your not hitting 32 w/out pinching the line you have something wrong, I would guess the wastegaste solenoid is stuck open...
There is no blanked 3rd gen boost number, you have 03-04 SO and HO motors, 04.5-07 600's, and 6.7's, all 3 build different boost.... On a 04.5+ Cummins 600 you will hit 32psi stock as a spike and drop to 26-28 empty and 28-32 with a load. If not either your gauge is broken or your truck is....
On a 04.5-07 I have read 40 is fairly safe... Me I dont want to go much over 35psi, which is fine the most I have seen on my SW #1 from my Jr is 34....
There is no blanked 3rd gen boost number, you have 03-04 SO and HO motors, 04.5-07 600's, and 6.7's, all 3 build different boost.... On a 04.5+ Cummins 600 you will hit 32psi stock as a spike and drop to 26-28 empty and 28-32 with a load. If not either your gauge is broken or your truck is....
On a 04.5-07 I have read 40 is fairly safe... Me I dont want to go much over 35psi, which is fine the most I have seen on my SW #1 from my Jr is 34....