What did the factory set the boost at?
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Originally Posted by Giantman
Just curious as to what the factory set the boost at in the Turbo S and later cars?
Thanks.
Thanks.
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Originally Posted by UK952
It was higher on the turbo S and later cars but i forget exactly, 0.8 or 0.85
Tony
Tony
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10.1 psi
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1 Bar = 14.7 PSI 0.75 Bar = 11.025 PSI
Not at all - you're probably talking about atm (athmosphere).
If you substitute Bar with atm in your statement above - then it is not too far off.
1 atm = 1.013 Bar
I think the Porsche workshop manual (as posted by Hosrom) is to be taken as reference. They state the level at 0.75 and the unit as Bar:s.
0.75 Bar = 10.878 PSI
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The numbers are not exact, it's a range. Hence the manual stating 0.75 +/- 10%, some cars would be boosting 0.675bar (9.79psi) and still considered normal.
Boost drops to 0.52bar +/- 0.03bar, which is as low as 7.1psi at higher rpms is also normal. Remember, this is for a fresh engine with a fresh K26, age and wear and tear definately brings down the numbers, considering the cars are now hitting 20 years (1986 models).
Boost drops to 0.52bar +/- 0.03bar, which is as low as 7.1psi at higher rpms is also normal. Remember, this is for a fresh engine with a fresh K26, age and wear and tear definately brings down the numbers, considering the cars are now hitting 20 years (1986 models).