my question is. Is the b18 and b20 from the oldschool prelude the same motor and also which one is the best to run

 

b18's are most commonly from integras, and the b20 that came in the early model prelude is a completely different engine. stay away from that b20.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by supercivic69 &raquo;</TD></TR><TR><TD CLASS="quote">my question is. Is the b18 and b20 from the oldschool prelude the same motor</TD></TR></TABLE>
Absolutely not. The B20A/B21A is completely different from all other B-series engines. Stay far away from it.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">which one is the best to run</TD></TR></TABLE>
Depends on what you're looking to achieve and what your budget is.

 

I heard that you can make a stroker with the prelude B series crankshaft ...

is that real ?

 

well the b18a/b's and b20's have the same crankshaft so you wont accomplish anything there. but when it comes to the prelude b20, they are different from traditional b series engines so i doubt it'll work.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Untengijutsu &raquo;</TD></TR><TR><TD CLASS="quote">I heard that you can make a stroker with the prelude B series crankshaft ...

is that real ?</TD></TR></TABLE>
But why would you want to do that?

 

to me those old b20a5 prelude motors are garbage to me. if you wanted to go b20 do a b20b there cheap but the cylinder walls are weak though from what I have heard.

 

B20B/Z's have "weak" cylinder walls because they're a B18B block, overbored .2L.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Markb16a &raquo;</TD></TR><TR><TD CLASS="quote">if you wanted to go b20 do a b20b there cheap</TD></TR></TABLE>
I'd recommend the JDM '99-01 B20B or the B20Zx if he just wants to run a straight B20. It's a 20hp and 500 RPM difference.

If he plans to run a VTEC head, then as you said, might as well get the JDM '95-98 B20B or the B20Bx since you have to change the pistons . . .