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Wastegate spring or Boost controler

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Old 07-08-2017, 08:02 PM
  #16  
Metal Guru
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Originally Posted by urquattro20Vt
** what vacuum do you guys see at warm idle?**
When I measured mine with stock cams it was 13 inches of Hg.
Low compression engines make low vacuum compared to high compression engines.

When I was running .9 bar on my stock engine my boost control pressure was at the factory setting and my afr was about 12.5/1 at 6000 rpm. With cams I'm .2 bar higher on control pressure and still at 12.5/1 at 6000 rpm.
Old 07-09-2017, 04:18 PM
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heliolps2
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Originally Posted by Metal Guru
When I measured mine with stock cams it was 13 inches of Hg.
Low compression engines make low vacuum compared to high compression engines.

When I was running .9 bar on my stock engine my boost control pressure was at the factory setting and my afr was about 12.5/1 at 6000 rpm. With cams I'm .2 bar higher on control pressure and still at 12.5/1 at 6000 rpm.
Hey Paul
Thank you for your input


What gear are doing you testing ? As you know the lower the control pressure the richer.

I'm sure when I can find a safe place to do 3rd gear pull to 6000 rpm she should be in the low 12's hopefully
Old 07-09-2017, 04:48 PM
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Originally Posted by heliolps2
Hey Paul
Thank you for your input


What gear are doing you testing ? As you know the lower the control pressure the richer.

I'm sure when I can find a safe place to do 3rd gear pull to 6000 rpm she should be in the low 12's hopefully

Third gear yields the most time at load so that's what I use. If your enrichment isn't quite perfect, you will see it in third.
Yeah, lower is richer. Thanks for that reminder. I ended up being .2 bar lower than stock.



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