How much much more power 3.625 vs 3.75

[TripleB]

As the title states. How much of a hp bump would I see by pullying down with 3rd gen Whipple stage 2? It’s only about 1psi of boost more. Right?

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[lxh89]

There's a fairly easy way to calculate the number which will be an approximation (on the higher side) because it doesn't account for parasitic losses.

Take the vehicles original horsepower, multiply by it the amount of boost + 14.7 divided by 14.7. That number is BHP of the motor with that amount of boost.

For example, 435 * [(1+ 14.7) / 14.7] = ~465

That 1 pound of boost added 465 - 435 = 30HP at the crank

Since the blower takes some power to turn, you might figure rear wheel horsepower gain around ~23 rwhp per psi of boost. The higher the efficiency of the blower, the less parasitic loss.

Turbos power per psi is the same as a blower, it's the efficiency thus amount of parasitic loss that makes the difference with what ends up at the rear wheels.

Tony

 

[TripleB]

There's a fairly easy way to calculate the number which will be an approximation (on the higher side) because it doesn't account for parasitic losses.

Take the vehicles original horsepower, multiply by it the amount of boost + 14.7 divided by 14.7. That number is BHP of the motor with that amount of boost.

For example, 435 * [(1+ 14.7) / 14.7] = ~465

That 1 pound of boost added 465 - 435 = 30HP at the crank

Since the blower takes some power to turn, you might figure rear wheel horsepower gain around ~23 rwhp per psi of boost. The higher the efficiency of the blower, the less parasitic loss.

Turbos power per psi is the same as a blower, it's the efficiency thus amount of parasitic loss that makes the difference with what ends up at the rear wheels.

Tony

I appreciate the explanation. Thank you!

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