I'm thinking about building an all motor B16A (Please no comments) and I'm wondering what the mechanical differences between the B16 generations are?

As in, any mechanical differences between the EF/SiR, EG/SiR, and the US Si engines, or are they all the same?

I thought I read or heard there were a few differences. Anyone know?

Thanks.

 

Do do believe there are differences, although they are minor. If your looking to pick one up, I would recommend one post 1992.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM_Ej &raquo;</TD></TR><TR><TD CLASS="quote">Do do believe there are differences, although they are minor. If your looking to pick one up, I would recommend one post 1992. </TD></TR></TABLE>

Yeah, I'd like to know these differences to gauge what I would like to do.

I'm asking because I can pick up an older gen 1 B16 from an EF for cheap, but don't want something that's not as robust as a later generation...

 

for one, the gen 1 has a cable tranny if you are buying a complete swap. the JDM one's are listed at 10+ HP than USDM apparently because of either compression or octane differences. don't know for sure, i have a JDM, so never really worried about why i had 10 more HP. if you end up with a motor that was mated to an auto trans, then the cams will be less aggresive than one that was mated to a manual. the only other big difference that i can think of is the OBD differences. i would limit my search to the same OBD that the car that the swap is going into is. you can get conversion harnesses, but that is just one more thing to buy. side note, the 94-97 USDM del sol VTEC came with a B16 also.

 

Thanks for the reply Don, but I want the MECHANICAL differences...

I know about the tranny, OBD and sensor/injector issues.

I'm talking about the engine longblock/head only.

 

he GAVE you one difference, the cams will be different in a motor that was mated to an auto tranny. As you should already know, the obdo will have all of the external vacuums on the manifold for the high idle and all of that good stuff. The obd1 is probably the one to buy, it has obd1 injectors already. As far as real differences, there are none that i know of, maybe the ports in the obd0 are a little different, but it wont make much difference.

 

casting of b16a1 is smoother. more room for porting, i asked this qeustion once because i can buy a 1 gen for cheap!

 

The first gen b16a has a compression of 10:2 to 1 while the 2nd gens have a compression of 10:4 to 1. From what I know those are the mechanical differences. But if you are building one don't bother with the 2nd gen.

 

http://www.hondaswap.com/forum...29823

 

i think the first gen b16 has smaller lma's you might wanna get those replaced if using high lift cams

 

Can anyone verify the 1st gens have single valvesprings on both in. and ex.?
Heard this from somewhere but dont know if its true...

If your talking about just the longblocks, I think the pistons are the only difference. Probably injectors too..

I think the later gens had cleaner castings too. Theyre not as grey as the old ones, (better alloy?)

 

I guess nobody wants to click the very informative link I provided. Oh well, carry on with your guesses.

 

No the first gens have dual valve springs on the intake? I cant remeber I replaced them right away with the ITR duals. Funny thing is the ITR duals are acutally softer spring rate than the singles I pulled out, but they follow the cam better, less valve float and dont put as much pressure on the cam.

 

my b16 1st gen had single valvesprings on both intake and exhaust before i changed them with jg dual springs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JohnnyWash1 &raquo;</TD></TR><TR><TD CLASS="quote">http://www.hondaswap.com/forum...29823</TD></TR></TABLE>

This is what I wanted.

Thanks!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cynical 1 &raquo;</TD></TR><TR><TD CLASS="quote">

This is what I wanted.

Thanks! </TD></TR></TABLE>

You're welcome