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Old 08-19-2008, 07:37 AM   #1
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Increasing Base Boost - TD04

My TD04 is only getting a Base Boost of 5psi. My stage 5 setup is getting a max of 15psi.

I emailed Jak to see what my base boost should be set at.


I just need to know how to increase the base boost. I've searched, and sifting through old threads didn't help much.

To increase the base boost, I'm supposed to shorten the wastegate actuator rod, correct?
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Old 08-19-2008, 07:59 AM   #2
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Yes, shorten the rod.

This is for a 9000 TD04 (pretty much the same thing).

http://www.saab9000.com/procedures/e...seboostadj.php
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Old 08-19-2008, 08:49 AM   #3
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Or add a helper spring.
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Old 08-19-2008, 08:58 AM   #4
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Also, you need to get the right turbo on there for that tune! Or at least have someone lean down the fueling since its not going to be flowing the right amount of air relative to MAP sensor readings at each spot on the fuel map (which is probably part of the reason you use so much fuel, and the car is not that fast).
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Old 08-19-2008, 09:03 AM   #5
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JK, we put finished installing the TD04 last night. thats when we found the base boost issue on the TD04
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Old 08-19-2008, 09:07 AM   #6
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Quote:
Originally Posted by JK View Post
Also, you need to get the right turbo on there for that tune! Or at least have someone lean down the fueling since its not going to be flowing the right amount of air relative to MAP sensor readings at each spot on the fuel map (which is probably part of the reason you use so much fuel, and the car is not that fast).
Yup, just finished getting the TD04 installed. Boosts only to 15psi. Switch to base boost, and it shows base of 5psi.

With the T25, I was getting a full 19-20psi.



We had to separate the exhaust and compressor housings from the turbo in order to drill out one of the studs on the exhaust flange, and we separated the wastegate actuator to do that. So that may have messed up the base boost.


In any case, I need to get base to what it should be, then I should see full boost, and get my power back.
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Old 08-19-2008, 09:08 AM   #7
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Yes, but still, the stage 5 tune is written for 18t or 19t, I am about 99% sure of it.
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Old 08-19-2008, 09:13 AM   #8
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Anyway, shorten the rod. This should be common knowledge by now
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Old 08-19-2008, 09:34 AM   #9
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Quote:
Originally Posted by JK View Post
Yes, but still, the stage 5 tune is written for 18t or 19t, I am about 99% sure of it.

https://www.saablink.net/forum/showth...&highlight=jsp


Quote:
Tuned for Mitsubishi Aero Td04.

Not all ECU's are tuned equally


Had it been tuned for a 18T, or a T28, I wouldn't have kept asking or looking for a TD04, and talking about getting a TD04 for the past 3-4 months.
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Old 08-19-2008, 09:44 AM   #10
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So you think all TD04 are created equal? You think a TD04 18t is not a TD04? Did you get that info from the person who wrote the tune? Will a TD04 13t work fine? Its a TD04, I can't see why it wouldn't with your logic

please think before you mock me.

(although now I see that he says 15t - but just saying TD04 does NOT denote what size)

cliff notes: an 18t is a TD04 you dumbass.
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Old 08-19-2008, 09:48 AM   #11
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oplz guys. the tune is designed for an "aero td04" i.e. a 15t. yes, the stage 5 is probably out of the efficiency range of a 15t, but oh well?

can we stop the haet?
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Old 08-19-2008, 09:51 AM   #12
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Point that has been made many times. Jak will tell you this himself. When you need more base boost, I needed 7-8psi for my stage 3+, you should, in my opinion and others, not shorten the rod, but add a helper spring.

When you shorten the rod, you shorten the travel and then the waste-gate cannot open as far to dump boost if needed to save the motor.

The better option is to add a helper spring that will be adjustable, give you the base boost you want and keep the full travel of the actuator and waste-gate.

You can get the perfect spring from advance auto, its the brake pedal return springs, 4 in a clear pack for 5 bucks. Pick the one that is around 2mm wire diameter. Put the hooked end on the actuator bracket and then measure the straight part of the wire at the waste-gate pin. When you ben it so it will wrap around the waste-gate pin, you want the spring to have to stretch about 1/4" to connect to you're mounting point at the actuator bracket. This will give you rigth at 7-10psi base boost. Then you can shorten or lengthen the bend in the hook to adjust base boost.

Its fully adjustable, keeps full travel of the waste-gate and is easy to use and adjust.
https://saablink.net/forum/attachment...4&d=1207612378

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Old 08-19-2008, 09:52 AM   #13
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I do not hate Amish at all. Only wub! He just told be that it was not for a 18t, it was for a TD04...which makes no sense.
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Old 08-19-2008, 10:00 AM   #14
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Ugh...

The assumption that I failed to verify the proper turbo for my tune before spending money on a turbo, and investing the time/effort/energy to install said turbo, it's bothersome.

Why do I even bother... because obviously I'm doing it wrong, 100% of the time.


I'm sorry if I came off as mocking you JK, but I hope you can understand my frustration.
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Old 08-21-2008, 10:50 AM   #15
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Yay, with the springs my base boost is where it should be, and i'm seeing 20psi now.

The car pulls nice and hard. And towards the top of 2nd gear the wheels break loose.



But the turbo is burning oil. Which I knew was a possibility when buying a used turbo.




Considering a T25/28 upgrade + reflash from Jak... then getting the TD04 rebuilt into an 18T for sell or future use in another NG900 or 9-5 etc...

Or say F-it and do holset+t5suite.
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Old 08-21-2008, 11:05 AM   #16
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its not as easy as saying "F-it"

ask saab9-3usa
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Old 08-21-2008, 11:13 AM   #17
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Old 08-21-2008, 11:15 AM   #18
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true... i suppose with the price of a manifold & buying a holset, i could buy a GT3071 and a manifold spacer.

In any case, my NG900 will most likely spend the winter up on blocks like my SPG did last winter.
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Old 08-21-2008, 11:26 AM   #19
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Quote:
Originally Posted by amish_geek View Post
Yay, with the springs my base boost is where it should be, and i'm seeing 20psi now.

The car pulls nice and hard. And towards the top of 2nd gear the wheels break loose.



But the turbo is burning oil. Which I knew was a possibility when buying a used turbo.




Considering a T25/28 upgrade + reflash from Jak... then getting the TD04 rebuilt into an 18T for sell or future use in another NG900 or 9-5 etc...

Or say F-it and do holset+t5suite.
What? How much oil is it burning? Are you sure your custom lines aren't a cause for that?
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Old 08-21-2008, 11:52 AM   #20
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Quote:
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What? How much oil is it burning? Are you sure your custom lines aren't a cause for that?
I have no custom lines. Using the stock oil lines.


I'm using larger washers and new banjo bolts on the COOLANT lines like DIP's site says to do. But the oil lines between the TD04 & T25 are the same.
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