Utah Beast Mode
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Where's all the other Utah GTI owners at? Lol.
6
Any Utahns?
- Thread starter My12GTI
- Start date
GlowstickNinja21
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I remember that there is something weird with the way the ecu reads the pressure. It gets it from the Map sensor, but I know there is some sort of correction that has to take place.
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Gretchen GTI
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Ya I'm almost positive you have to divide in half it's the only thing that makes sense.
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GlowstickNinja21
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APR 3.1 tune I'd running 25-28 psi consistently. This is 10-13psi over what the K03 produced. Keep in mind it isn't the pressure that usually blows up internals. It is the back pressure of the restrictive manifold that opens exhaust valves and causes a lean situation. Thus grenades the motor. Once you go big turbo, the restriction is gone, but now the pressure does wear on the pistons and rods.
Gretchen GTI
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Ya I'm thinking march 2015 just going ahead and replacing valve springs just to be safe.
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GlowstickNinja21
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It really is a good idea. I was thinking of developing a less restrictive hot side for the Borg Warner turbo that is used for all the K04 kits. Something you would have to split the CHRA and reassemble to turbo with. Best of both worlds, fast spool time and no back pressure restriction.
Gretchen GTI
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Ok I got it take 2253 then minus 1000 for atmospheric pressure then multiply by 0.0145037738 the answer is
18.17
That sounds much better I was starting to get worried I was like there no way the engine will hold up to anymore boost haha
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GlowstickNinja21
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Yep that sounds better. I knew it was a "corrected" amount. This is why I rely on my trusty mechanical boost gauge. It never lies to me!
Gretchen GTI
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Really how so like on the turbine side different wheel/fins? Or some kind of spacer? Idk just a shot in the dark.
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Gretchen GTI
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GlowstickNinja21
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Nah, a new casting for the exhaust manifold leading to the turbo. If you have ever seen a K04 it has a very small runner leading to the turbine wheel On the exhaust side. I think this could be designed a little better to allow better flow but still spool at a good rate. A lot like the disco potato turbo was for the 1.8t.
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Gretchen GTI
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No I haven't actually seen it in person. So will there still be benefits to a different manifold if you get stronger valve springs? I'm guessing just less back pressure on the system all together is a plus. I thought it was just the design of the turbine wheel that really causes the most back pressure
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GlowstickNinja21
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On this turbo I believe it is mostly due to the very small Exhaust runners. If you look at the big turbo kits, they all have a custom manifold that is hella beefier and flows much better. The valve springs are really only needed when there is a lot of back pressure. The big turbo guys don't usually do springs.
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Gretchen GTI
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True but they also are recommended to upgrade their internals but that'd be awesome if the k04 kit had wider runners and could alleviate the back pressure
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GlowstickNinja21
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I agree. It would then be a sort of hybrid turbo. I know why they are designed the way they are. To be reliable and predictable. But that's no fun! Hahaha