WONG FRIED RICE

whats the difference between the Sir I and SirII b16a's??? i heard one was 170 hp and the other 160hp. Is that true?? If so...which one has the 170, and why is it different?? can you convert one to the other?? thanx!!

xtrafastcivic

B16a sir2 has 170 and it comes with a hydro tranny i think it's 170 because of the compression 10.4 the other b16a has 10.2

WONG FRIED RICE

how can you tell if you have the Sir I or the Sir II?? If i have the Sir I is there anyway i can convert it to the Sir II?? (taking into account that i don't mind spending the money to do so)

raene

No, there's no financially feasible way to do this. The B16A2 has different oiling systems than the B16A (B16A1 doesn't exist, it's just the B16A). Also the VTEC system is improved on the B16A2, so that it kicks in faster. Plus, the B16A2 is newer .

P.S. I believe the block stamp will tell you if it's a B16A or B16A2... check out http://b16a.honda-perf.org/tech.html and I think it has a guide. To save you some trouble... off the site: "A second gen B16A's valve cover has "VTEC" written in a larger font than "DOHC"." HTH!


[Modified by raeneshadow, 12:51 AM 4/16/2001]

WONG FRIED RICE

yea...i checked...and i have the B16A no numbers....hm...so are there any advantages of having the b16a that i have? or any other good points about the SirI engine?

DreamSpeed

maybe i can clear things up as i did some research on this topic when i was getting a b16a swap, basically the b16a first gen is 10.2:1 compression while the second gen is 10.4:1 resulting in 10 extra hp first gen b16a is cable tranny (most likely Y1) and second gen is hydro tranny (most likely Y2) both motor only have b16a stamped with no numbers behind it, the best way to tell is to look at the intake manifold the first gen says PGM- something somethig (forgot what it says exactly) but the second gen doesn't say anything, basically the second gen and first gen is the same except the second gen is a little more powerful and newer, but the first gen cable tranny has slightly better gear ratios then the hydro one from the second gen

WONG FRIED RICE

SO ARE THERE ANY REAL ADVANTAGES THAT ONE HAS OVER THE OTHER BESIDES THE OBVIOUS?

Cory man

the B16a SiR II has better oil control than the B16a 1G. other differences are higher comp. and 10 more horses.

DreamSpeed

not really a big difference and no really noticeable advantage besides the 10 hp more for the second gen and the better tranny for the first gen, and also the first gen supposedly has a better oil system i remember reading it somewhere, but don't stress over it as both motors are basically the same

TypeR0207

What about the parts compatablility??

I know that basically all B-series VTEC stuff is compatable, but would you be able to use the Skunk or ITR manifold on the First Gen.? And would a cam upgrade have the same effect as the newer gen. stuff if the VTEC actuation is different?

Trying to figure out what to do myself in the future.

eg6ajk

yes they are basically the same....don't even bother trying to get a 2nd gen if you have a 1st gen for good price...(if you are talking about engines only)....the differences are so small....yes the ITR manifold will work with 1st gen b16a...but a 92+b-series fuel rail will be required...for skunk there should be no problems.....

as far as cams they would work for both in the same way...

the differences in both are:
10hp
.2 c/r
slightly better cams in 2nd gen
obdi vs non-obdi
cast vs machined oil feeding lines...
rad housing....
slighlty different intakes/exhaust

in real world this difference is not felt as much as many want you to belive...it is not a night and day difference its more like d16z6 and d16y8 difference...not much better or stronger just newer....

WONG FRIED RICE

since most b-series motors have interchangeable parts, would it be better to use both ITR cams or CTR cams...or maybe CTR intake cam, and ITR exhaust cam, vice versa?

TypeR0207

I have found the 1st Gen. as low as $999 plus $300 ship freight to nearest port for engine/tranny/computer plus extra junk through http://www.custom-efx.com and it is also available fairly cheap from http://www.nippon-motors.com although I have no experience with either of these ...... just browsing to find the best prices.

TypeR0207

CTR intake, ITR exhaust (CTR and ITR exhaust are the same thing, so get whatever is cheaper price).

sgT

SiR 1 and SiR2 have nothing to do with the engines.
They have nothing to do with motor generations.
They are TRIM LEVEL designations. SiR 1 and 2 were available since 1990.
SiR 1 is the stripped down version and 2 is the street version and has
LSD standard as well as power windows,ABS and other crap.

So if you got an LSD transmission its probably an SiR 2 motor. But as far
as the motor goes, THERE IS NO DIFFERENCE.

davew

thanks SgT, I'm glad someone finally pointed that out...I was getting dizzy reading all that missinformation until I got to your post at the bottom.

as for motor differences, while there are none between the same gen SiRs and SiRIIs...there are a few between different generations that should be noted. Most have been mentioned above. Most significant (beyond age and high milage) is the improvement in cooling for the newer head castings especially around cylinders 3&4, which significantly reduces hotspots and also blown headgaskets. there are the usual internal differnces such as the cam hold downs being extruded rather than cast, same w/ the oil rails, etc...and some componets are different or in differnt locations. the ECT sensor is moved, the injectors are obviously different...different cam profiles, and the increased CR comes from larger piston domes.

also the 88-91 motors are stamped B16A1 ..... the 92+ motors are B16A in JDM land and B16A2, 3, etc for the rest of the world. you can often tell them apart from the valve cover or intake..but since these things are easily swappable the best way is to look inside the head. if you don't know how to read casting numbers on it then look at the oilrails. problem is some of the 91 B16A1 teg Xsi motors were hybrids of sort that got the older style head but the P30 pistons so they are 170hp as well...only way to know them is to scope the head and look at the stamps on the piston tops...

thats about all I can think of off my head...
later
dave w

Stinkalope

Since were on the subject, I think some of my parts have been swapped out. My motor is supposed to be out of a SIR Crx (B16a1). My intake is blank. And my cylinder pressure is very high (200psi), buts its cable (y1). Off course its possible that the motor was upgraded but the previous owner of my car said he got all the parts off the car complete (inluding full exhaust, hatch, tail light section, etc.)
Sorry question is I guess my motor is B16a2.............

GIANT

if you guys want to really get technical and sound smart on this forum sir1 went to 92 because the crx wasn't gone till 92 in japan soo ohhh and the sir1 came with power windows didn't the crx sir have power windows sir2 came in eg civics !!!!! and sgt you tell a lot of messed up info

WONG FRIED RICE

so if you guys were to choose one...would you prefer one over the other?? or it doesn't matter?

xtrafastcivic

to me the only thing that would bother me is the tranny sir2 is hydro and sir1 is cable i would change the pistons to ctr's anyways

rynovtec

Hey i got a b16a6 in my car so my sleeves looks crack so i bougth a b16a block now wil the performance be beter or not

rynovtec

Hey i got a b16a6 in my car so my sleeves looks crack so i bougth a b16a block now wil the performance be beter or not then b16a on tag says b16a
5410340
HM


Is that block beter then my b16a6???