blownstanger
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Ver helpful Dal, thanks.
Dalamar said:Do you ever find yourself saying:
"how much power will this add?"
"how much boost should I run?"
I find this equation handy:
[(boost / 14.7) +1] x base HP
best to add rear wheel HP because it accounts for your drive train loss.
plug in base HP and boost - this is very close to what your power will be.
Other factors to keep in mind:
posative displacement or roots type blower will give you a longer torque curve.
Centifical gains are more on the top (obviously)
Turbo's are a little different because they don't take power off the crank to operate.
Hope you guys find this info helpfull. ;D
you are right on everything except that F/I cars have less problems with elevation. This is due to the fact that air is being compressed. It might take a bit longer to spin but the power loss of a F/I car should be less than with N/A cars. N/A cars have a VERY hard time with altitude because air is sucked in by a vaccum.94turbostang said:Dalamar said:Do you ever find yourself saying:
"how much power will this add?"
"how much boost should I run?"
I find this equation handy:
[(boost / 14.7) +1] x base HP
best to add rear wheel HP because it accounts for your drive train loss.
plug in base HP and boost - this is very close to what your power will be.
Other factors to keep in mind:
posative displacement or roots type blower will give you a longer torque curve.
Centifical gains are more on the top (obviously)
Turbo's are a little different because they don't take power off the crank to operate.
Hope you guys find this info helpfull. ;D
this equation is useless for turbo setups. reason being is turbo size/efficiancy.
running 20 lbs on a small knock off turbo will produce low numbers realistically. running 20 lbs on a bigger turbo/more efficient will produce much bigger numbers. like comparing a garrett 44 trim to a hks t-88 turbo with both making the same boost.
think of it this way, stick a small straw into a balloon, and blow the balloon up. now take a large straw or whatever and try blowing it up. youll notice how much faster the balloon fills with air using the larger diameter straw. straw=turbo.
this is also without factoring ambient air temp and elevation. im almost at denver elevation. take my car to see level and id see a huge difference in numbers. elevation plays a huge factor with cars under forced induction because your trying to compress air to fill the cylinders with more air than the pistons would naturally suck in. colder air= air molecules are closer together. hot weather= air molecules are spaced further apart.
im not trying to knock anyones math or calculations. i hope this doesnt cause any drama. im just trying to expand the knowledge