wastegate adjustment

1677 Views 5 Replies 3 Participants Last post by TheHammer69, Jul 3, 2005

fyrehose

Discussion Starter · Jul 2, 2005

After installing my new DP chip, I have been seeing 30-32 lbs. of boost with my stock turbo. I have a Banks wastegate and was wondering how can I adjust it so it won't go over 25? Do I adjust the horizontal rod that goes to the turbo? How do I do it? Thanks

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TheHammer69

· #2 · Jul 3, 2005

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After installing my new DP chip, I have been seeing 30-32 lbs. of boost with my stock turbo. I have a Banks wastegate and was wondering how can I adjust it so it won't go over 25? Do I adjust the horizontal rod that goes to the turbo? How do I do it? Thanks

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The way you typically adjut the Bank's Big Head Actuator is to adjust the rod until it just fits over the connector, and then at this point, you turn the rod in another 6 full turns. So in your case, I'd probably back off one full turn on the rod and see where you are at.

Hammer

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TheHammer69

· #4 · Jul 3, 2005

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thanks hammer. All I have to do is loosen the nut and turn the rod counter clockwise? Will the rod turn by hand? and also how much will 1 turn give me?

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You will have to pull the eyebolt off the "stud" to get it to turn so that means pulling that little E-clip that locks it on too. I have no idea what one turn would give me, I just offered up as a good starting point. If it was me, I'd just leave it as is and not pay much attention to the "sky is falling" folk when it comes to exceeding 25psi. IMHO, that is just a rough number to be weary of exceeding excessively. I know of some people that are still going with a stock turbo hitting 38 psi. I have seen 33 as my highest so far, i don't worry, and recommend that you leave it be.

Hammer

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TheHammer69

· #6 · Jul 3, 2005

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If it was me, I'd just leave it as is and not pay much attention to the "sky is falling" folk when it comes to exceeding 25psi. IMHO, that is just a rough number to be weary of exceeding excessively. I know of some people that are still going with a stock turbo hitting 38 psi. I have seen 33 as my highest so far, i don't worry, and recommend that you leave it be.

Hammer

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I respectfully disagree with Hammer. I guess my sky is falling /ubbthreads/images/graemlins/biggrin.gif.

Everything I have read, and several very knowledgeable people that I have talked to, agree that even though your stock turbo is capable of more than 25 pounds of boost. The damage you are incurring to the turbo with the excessive boost, combined with the excessive heat you are generating, does not pencil out to being worth the minor gain you realize from over boosting the stock turbo.

Do a search on boost and you will see pages of threads on what the stock turbo is "capable of" versus what it's most efficient range is.

Tom

On Edit: I forgot that another factor of excessive boost on a stock turbo is excessive back pressure.

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Hey, I expected people to disagree with me on this one. I know so called professionals have supposedly stated the 25 psi limit to the stock turbo and that is all fine and dandy but there are many exceeding the 25 psi and staying alive, there are also some that don't stay alive, there are also some that never exceed 20 psi and die. It's all about willing to push for all you got. I really don't care a whole lot about my turbo because when it goes, it's replacement won't be anything I need a core for. And yes, it's out of it's compressor map at these 30 plus boost numbers but yet the dyno usually shows increased horsepower with most of the guys i have seen with the above 25 pressures. This goes against what these so called professionals say and thus I'm of the opinion that one should just run it and be happy. But of course, it's his truck, I just threw my opinion out there so he can have a differnt perspective on the "Oh My GOD" don't exceed the 25psi deal.

Hammer

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