Question on B21 Prelude engine???
 

from the 2nd gen prelude SI the B21 motor, is it a good motor to work with? is it worth putting a vtec head on it?? i'm wondering cause it has more liters and its B seires... let me know peoples..

Re: Question on B21 Prelude engine??? (IV_SHO)
 

Isn't it a B20? I'd leave it alone, unless it were free.

Re: Question on B21 Prelude engine??? (t0p_sh0tta)
 

I though that it was a b20 with sohc 12vavle motor. I wouldn't put that thing into anything but like a go-cart. It's a piece

Re: Question on B21 Prelude engine??? (IV_SHO)
 

no, the 1991 prelude SI is B21 DOHC...

Re: Question on B21 Prelude engine??? (t0p_sh0tta)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by t0p_sh0tta &raquo;</TD></TR><TR><TD CLASS="quote"> I'd leave it alone, unless it were free.</TD></TR></TABLE>

Even if it was free, i would use it for a door stop. IT IS CRAP.

Not interchangeble with any other b-series stufff that i know off even though it is a b series

Re: Question on B21 Prelude engine??? (IV_SHO)
 

so i shouldn't mess with it.... how bout the h23/vtec??

Re: Question on B21 Prelude engine??? (IV_SHO)
 

Sorry, it's widely regarded as the bastard stepchild of the B's

I have heard of people putting B16A1 heads on with a little machine work. I haven't actually seen one though and people talk shit...

Re: Question on B21 Prelude engine??? (ProJectCvic)
 

oh well did a little research. motor is a piece of crap. doesn't respond to mods at all. Got crappy rod/stroke ratio. Had the same cylinder wall lining as a NSX motor but honda used some wrong rings on it so it burned oil like a mug. Some poeple switched to moly rings on it. The rumor is that there was some dude that slapped a vtec head on it and actually got it to start but no one knows if it ran good or not.

Just search everyone says it's crap. It supposably is rated at like 135hp and 130 or 140 torque (wierd honda motor with as much torque as hp, lol) and it puts down like 110 to the wheels. In other words heavy piece of crap.

Re: Question on B21 Prelude engine??? (ABK)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ABK &raquo;</TD></TR><TR><TD CLASS="quote">I though that it was a b20 with sohc 12vavle motor. I wouldn't put that thing into anything but like a go-cart. It's a piece</TD></TR></TABLE>

That's a B20A3

The 3rd gen Si's are all B20A5s and B21A1s DOHC 16 valvers

Leave it in the Prelude chassis. It's no good in a Civic. The torque numbers are ok I guess but you'd be faster with a B18A


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">The rumor is that there was some dude that slapped a vtec head on it and actually got it to start but no one knows if it ran good or not.</TD></TR></TABLE>

see? I am not the only one that's heard of a B21A1 Frankenstein. I still haven't actually seen one


Modified by devi1man at 2:14 PM 9/15/2004

Re: Question on B21 Prelude engine??? (ProJectCvic)
 

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

Even if it was free, i would use it for a door stop. IT IS CRAP.

Not interchangeble with any other b-series stufff that i know off even though it is a b series</TD></TR></TABLE>