whats the longest stroke that i can take on a b18c block? or will it be easy to get the stuff i need if I go with a dart long block?

 

95mm

 

im sry if this sounds dumb and all, i mean i understand what bore and stroke is, but how do u make the stroke longer? is it possible, or are u just asking something totally different..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lqd44 &raquo;</TD></TR><TR><TD CLASS="quote">im sry if this sounds dumb and all, i mean i understand what bore and stroke is, but how do u make the stroke longer? is it possible, or are u just asking something totally different.. </TD></TR></TABLE>


larger crankshaft stoke=more displacement

 

Yea get a "wider" crankshaft so that the bottom of the rod moves farther out to the sides. It'll increase displacement and make the piston move down farther, and increase torque, but a negative is that it'll put more stress on the sidewalls.

 

so what is the max that i can go on a b18c?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Del Sol on Steroids &raquo;</TD></TR><TR><TD CLASS="quote">so what is the max that i can go on a b18c?</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by that one doood &raquo;</TD></TR><TR><TD CLASS="quote">95mm</TD></TR></TABLE>


you can probably go bigger but that would require even more custom work

 

with 95 I'm good, good looking out. I really needed this info.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hatch_R &raquo;</TD></TR><TR><TD CLASS="quote">Yea get a "wider" crankshaft so that the bottom of the rod moves farther out to the sides. It'll increase displacement and make the piston move down farther, and increase torque, but a negative is that it'll put more stress on the sidewalls.</TD></TR></TABLE>

could always sleeve it

 

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

you can only get so much displacement by sleeving and overboring. throw in a big stroke and you've got yourself a 2.1-2.2L

 

I was thinking of brian crower, it comes with a 95 crank. other then spoon, scat and toda, are they anyother?

 

eagle

 

95mm is pretty normal and completely safe on a b18. if you go dart tall block, i heard of people running 105mm stroke.

 

Who makes a 105mm crank?

 

so is it better increasing the bore, or the stroke?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">Who makes a 105mm crank?</TD></TR></TABLE> custom order.
im running a crower 95x81 kit now and it is pretty sweet, im almost tempted to sleeve my block and go 95x84.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lqd44 &raquo;</TD></TR><TR><TD CLASS="quote">so is it better increasing the bore, or the stroke?</TD></TR></TABLE>

depends...but usually they go hand in hand

 

If you want to get technical, increasing bore doesnt affect R/S ratio.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lqd44 &raquo;</TD></TR><TR><TD CLASS="quote">so is it better increasing the bore, or the stroke?</TD></TR></TABLE>

boring to 85mm puts you at ~2L without messing with the revvability of the engine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by that one doood &raquo;</TD></TR><TR><TD CLASS="quote">boring to 85mm puts you at ~2L without messing with the revvability of the engine</TD></TR></TABLE>AS MUCH.

 

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

plus one...You decrease the wall thickness youre definately playing around with its revvability

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Muckman &raquo;</TD></TR><TR><TD CLASS="quote">If you want to get technical, increasing bore doesnt affect R/S ratio.</TD></TR></TABLE>

Nobody said it did. Increasing stroke does. But with increasing the bore, you have to worry about too thin of sleeves.

 

so when u increase the stroke, ur max rpm drops?

 

It doesn't necessarily drop until you go past a point where it would start cracking sleeves. I'm not an engine builder or anything so I couldn't say what that point is, but that's the jist of it.

 

what about the bore is 87 too much, should I stick with 84?