4.8 or 5.3 for boost?

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11-25-2008, 12:24 PM

#21

Wilde Racing

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Quote:

Originally Posted by Noah Burns

8.5:1 is going to leave power on the table... it will be VERYYYYY safe, but leave a lot on the table too I think. 10:1 would be my starting point, get the tune right, run the right gas and you're good to go.

how do you figure? a 8.5:1 can safely handle more boost thus make the same if not more power....

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11-25-2008, 12:26 PM

#22

RandomHero

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Quote:

Originally Posted by Wilde Racing

how do you figure? a 8.5:1 can safely handle more boost thus make the same if not more power....

LOL that's what I was thinking. 10:1 + 12lbs of boost=

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11-25-2008, 02:13 PM

#23

Noah Burns

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I guess in a stock internal'd motor... I'm thinking more along the lines of a "good motor"

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11-25-2008, 02:19 PM

#24

RandomHero

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Quote:

Originally Posted by Noah Burns

I guess in a stock internal'd motor... I'm thinking more along the lines of a "good motor"

Still not sure what you're trying to say. He's wanting to run boost and too high of a compression ratio spells disaster with too much boost.

Now on a N/A motor then yes you'd want a higher compression ratio, but that's completely different.

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11-25-2008, 10:05 PM

#25

Stoichiometric

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With less compression you can fit more air in the cylinder at a given pressure. More air, more fuel more power. Out of boost is a different story though.