Darksoul

If someone could list stock bores for d-series motors it would be greatly appreciated.

Honda-Hooligan

75mm i belive

civic-4-ges

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda-Hooligan &raquo;</TD></TR><TR><TD CLASS="quote">75mm i belive</TD></TR></TABLE>

00supercivic

if im not mistaken all the bore size is the same on all D-series motors 2.95 inches (75mm) the only thing different is the stroke in that case the D15 is 91.1mm and the D16 is 3.54 inches (90mm)

klungemonger

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00supercivic &raquo;</TD></TR><TR><TD CLASS="quote">if im not mistaken all the bore size is the same on all D-series motors 2.95 inches (75mm) the only thing different is the stroke in that case the D15 is 91.1mm and the D16 is 3.54 inches (90mm)</TD></TR></TABLE>

Whaaaaa??? That would make the D15 larger than the D16...

D15 stroke is 84.5mm, D16 is 90mm
All D-series bores are 75mm, as stated earlier.

00supercivic

my bad i think i had that backwards i guess i need to get my **** straight

LadyExotic

all D16s are 75mm bore by 90mm stroke.

D16 torque &gt; B16 torque due to the stroke.

klungemonger

Well, peak torque is higher on a B16 due to the high-rpms, but true the useful torque curve should be better on a D-series. Same principle applies when comparing any long-stroke vs. short-stroke configurations of the same displacement.

Spade

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by klungemonger &raquo;</TD></TR><TR><TD CLASS="quote">Well, peak torque is higher on a B16 due to the high-rpms, but true the useful torque curve should be better on a D-series. Same principle applies when comparing any long-stroke vs. short-stroke configurations of the same displacement.</TD></TR></TABLE>

LoL wrong.

Peak torque on the B16 is just the same as a D16. Or close enough to where it doesn't matter.

The B16 just revs higher and has the cams to do it and still maintain the torque to create the higher HP.

EKhothatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spade &raquo;</TD></TR><TR><TD CLASS="quote">LoL wrong.

Peak torque on the B16 is just the same as a D16. Or close enough to where it doesn't matter.

The B16 just revs higher and has the cams to do it and still maintain the torque to create the higher HP.</TD></TR></TABLE>

If that is the case. Why does my d16 have about 200hp 200tq and my buddies b16 have 240hp 160tq? stock motors & boosted of coarse.

Spade

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EKhothatch &raquo;</TD></TR><TR><TD CLASS="quote">

If that is the case. Why does my d16 have about 200hp 200tq and my buddies b16 have 240hp 160tq? stock motors & boosted of coarse.</TD></TR></TABLE>

HAHA I meant stock of course. Once mods are in the picture everything is out the window.

klungemonger

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Spade &raquo;</TD></TR><TR><TD CLASS="quote">

HAHA I meant stock of course. Once mods are in the picture everything is out the window.</TD></TR></TABLE>
"haha", mods don't change the laws of physics or thermal dynamics. Explain how what you said is any different than what I said. Peak torque IS higher on a B16, so I don't know why you sit there and say "wrong" then laugh. I'm not wrong, even if it's not THAT MUCH higher. Furthermore, peak torque on a b16 comes AFTER the D16 already hits redline.

The cams allow the B16 to breathe up at high rpms, but it's not what permits the internals of the motor to rev so high, it's the lower rotating mass moving a shorter distance in the same amount of time compared to the D16.