your only constant has to be pump gas, does the displacement determine your hp potential. for example you have an h22 and some mad turbo setup like you've all heard....tial this, precision that, big FMIC, blah blah blah.
lets say you dyno tune the car and youve reached the limits of the 93 octane, then you buy a stroker crank/rods and bore her out to get a h28 or whatever. will you be able to surpass the old limitations and get more hp?

 

their is a limit to how much a h series can be bored out to. i think it is like 2.4 liters.

 

but will that allow you to make more hp?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z6 &raquo;</TD></TR><TR><TD CLASS="quote">but will that allow you to make more hp?</TD></TR></TABLE>


hp= rpm x torque/5252

it gives you more torque, so yeah...

 

Displacement is the fundamental ingredient to making power...so yeah, ideally it will give you more power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lsos &raquo;</TD></TR><TR><TD CLASS="quote">Displacement is the fundamental ingredient to making power...so yeah, ideally it will give you more power.</TD></TR></TABLE>

not in all cases...The BSFC of an engine plays a big role in pump gas power. B series are able to be pushed ALOT farther on pump gas than H series. Also remember a larger bore needs more timing than a smaller bore. The keys to making pump gas power are low compression, VERY conservative (lack of) timing, and alot of boost.

 

If we simply define power as a product of how much air and fuel we can cram into the cylinder, then it stands to reason that adding displacement, or more volume, means that more air and fuel can be crammed in, thus producing more power.

 

now i have even more mixed thoughts, why can a B be pushed more than an H? i simply want to know WHICH motor out of, we'll say D,H, and B can achieve the most pump gas power? i know that a 2.4 or 2.6 liter H will be able to make very good max power(maby 700hp) but which engine and displacement will lead to max pump gas power and more inportantly WHY?

 

and what is BSFC?

 

z6 is an idiot

 

so b20's use?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z6 &raquo;</TD></TR><TR><TD CLASS="quote">and what is BSFC?</TD></TR></TABLE>Brake specific fuel consumption. Which is (I think) not what he meant to say... How about BMEP (brake mean effective pressure)?

Displacement & breathing are both important. If you increase one without the other, you won't get what you want...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z6 &raquo;</TD></TR><TR><TD CLASS="quote">and what is BSFC?</TD></TR></TABLE>

BSFC is Brake Specific Fuel Consumption. It is expressed in terms of pounds of fuel burned per hour per horsepower produced.