Which is better swap - JDM D15b or AUD D16y8

[Andrew21]

Hey guys, your oppinion ?

Which would be a better swap into a 92 EG GL...

JDM D15b Vtec SOHC
or
AUD D16y8 Vtec SOHC

Obviously the D16y8 is 1.6l vs D15b 1.5l , but im also thinking in terms of enginerring the motor conversion. As i have a d15b4 carby in at the moment..

I have read/heard mixed reviews on the D15b Vtec , alot of people on here saying its goes very well.. and then a very recommended and reputable workshop specialising in Honda's was telling me not to bother, saying i will be very dissapointing, and that the 130hp figure is bu$#$# and its more like 90hp ??

Can anyone with this motor honestly vouch for it , say in comparision to the
Twin cam Vtec motor - which is alot more $$$ however....

Is the D16y8 a more powerful motor due to the extra 100cc in displacement ?

Comments please..

I did search but coulnt find much info on the D16y8.

[egSi]

the d15 will be obd1 where as teh d16y8 will be odb2 so u may want to consider that. i always wanted a d15 for my eg but they r hard to find :thumbdwn:

the d15 will be lighter + same power in a 1.5. id go d15 but r parts that easy to get for it? like cam + manis etc
id go d15 just coz they r rare etc. :)

[Andrew21]

ahh ok didnt thing about that...

D15b arnt that rare believe it or not... there's alot of parts available on the internet, due to being a import engine,most of parts are available from overseas...

But how do these engines run ? can they keep up with a twin cam vtec motor ??

I just dont want to go through the trouble of a engine conversion only to not have that much power increase...

[egSi]

if d15s arent that hard to find ill get one when my zc blows up. :thumbsup:

i think to ask qs like 'keep up with' etc is a bad idea. just go view some standard quater mile times for both cars etc.

but it all comes down to the driver and generally its hard to say.

[TRU32U]

same thing isnt it =P

[KB]

Trav theres a JDM D15b VTEC for sale over hear, out of an JDM Eg8 yo!

As for your question mate. The D15b VTEC makes 130hp, The D16y8 makes 127Hp. So it that terms they are just about identical. Yet I would go for the Y8 as it has more aftermarket support(As far i know). Im not sure if cams are interchangable between the two. only way to check would be to find out if the head of the D15b is the same as the D16y1 or D16z6(US) then im definate that you can get cams and ****z. At the end of the day if the heads are the same then you could just source internal parts for the Z6.

[Andrew21]

Ok cool, makes you wander how two simliar engines but one with 1000cc more can have the same power output ? When u talk about aftermarket parts ? Arnt all D-series parts interchangable ? Except for major mods (cams e.t.c) .. im talking like I/H/E e.t.c

?

[KB]

btw its only got 100cc more if it was 1000cc it would be a D25y8 :P SICK!!!!

yes intake/header/zorsts are all interchangable. YOu can even go custom with your bottom end. With the yanks making frankinstiened engines using pistons/rods/cranks from a various of d-series cars.

On thing i forgot to mention is that "apparently" the JDM D15b VTEC came with an optional LSD.

[KB]

Goto www.d-series.org :honda:

Good referece there.

[egSi]

actually id go a y8 in my eg, i can get y8 parts easier and itll be a newer motor and im sure less ks and something a lil different :thumbsup:

[Zdster]

if d15s arent that hard to find ill get one when my zc blows up. :thumbsup:


That will be a while though wont it, or are you redlining every gear Trav :D

[krasyvy]

i went for the d15b because it's obd1 and much lighter.

although d16y8 may be easier to source parts for because it's not an import engine.

thought it's not hard to find parts for the d15b

[KB]

D15b VTEC lighter?

ffs there basically the same engine.

[IN73GZ]

y dont u just get a b16a???

[Weq]

forgot the d15b. its weaker and MUCH less aftermarket support for it. y8 all the way. all u need is a odb1 dizzy.

[Lukezen27]

D15b VTEC lighter?

ffs there basically the same engine.

Its only 1.5L nence lighter :p ????

D16Y8 127HP = 94WH 1.6L
D15b 130HP = 96KW 1.5L
D16Y1 130HP =96KW 1.6L Stronger than both D16Y8 & D15b or so they say at http://www.d-series.org/forums/ (http://www.d-series.org/forums/)?

Anyone plz corrcet me if I'm wrong?

[SiR JDM]

My d15b has LSD =]

Weq.. what makes the d15b weaker than the d16? just curious

Ive *heard* d15 respond better to turbo than the d16... fact of fiction?

the d15b is quite popular in taiwan ive heard... with i/h/e making over 100hp @ wheels and .. and are very very common (prob cuz they're cheap) base for turbo setups

[KB]

forgot the d15b. its weaker and MUCH less aftermarket support for it. y8 all the way. all u need is a odb1 dizzy.

Hey buddy .

Why need obd1 dizzy?
I got a harness and have tested obd1 ecu's fine?
am really interested :(

-KB

[SiR JDM]

btw back the original question... my d15b drives just as good if not better than any other d16 ive driven in the past (test drove a few when buyin previous rides and mates cars).

AFAIK (which isn't TOO much on this engine) it makes the same (or slightly more power) than the d16 but at a lower RPM.. the cams are alot more aggressive than the d16s

[Terry]

if d15s arent that hard to find ill get one when my zc blows up. :thumbsup:


:D i dont think is going to happen anytime in the near future....:D

Well, D16Y8 is newer and may be easlier to get a low k's engine, and if cost you the about the same, i'd say go for D16Y8.

[Weq]

d15b has weaker rods and pistons. they have more power stock because they come with a more agressive camshaft then all other d-series. there r/s ratio is a lil better then most d-series though, so they rev a lil easier.

best engine is the y1. it has 9.2 compression, and produces more power then the y8 with 9.6:1 comp with the same camshaft. The z6 head flows a lil more stock 2. y8 is also known for oil pump problems.

[Andrew21]

**** thanks for all the input guys... im leaning more towards the d16y8 now becuase of the fact that its a local engine. D15b being a import (JDM) i dont wanna get stuck one day for parts and have to wait a month for it to be imported...
Plus i think the wreckers here in AUS will have more parts for the d16y8 - e.g wiring harness to suite, ecu e.t.c

So the final vote ? - Go D16Y8 SOHC VTEC 127HP ?

If this engine is OBD2 - What does this mean exactly ? i know ur talking about the wiring ? But what exactly.. On paper my car is 'technically' built Sep 91', and has stamped EG4... But it looks like current 92-96 EG shape..

Would my car be OBD1 ? if so, what is involved/need to fit the D16Y8 in terms of wiring ?

[Lukezen27]

**** thanks for all the input guys... im leaning more towards the d16y8 now becuase of the fact that its a local engine. D15b being a import (JDM) i dont wanna get stuck one day for parts and have to wait a month for it to be imported...
Plus i think the wreckers here in AUS will have more parts for the d16y8 - e.g wiring harness to suite, ecu e.t.c

So the final vote ? - Go D16Y8 SOHC VTEC 127HP ?

If this engine is OBD2 - What does this mean exactly ? i know ur talking about the wiring ? But what exactly.. On paper my car is 'technically' built Sep 91', and has stamped EG4... But it looks like current 92-96 EG shape..

Would my car be OBD1 ? if so, what is involved/need to fit the D16Y8 in terms of wiring ?

If you cars that old I'd try and find a D16Y1 and have it rebuilt

More power
Stronger
Should be cheaper

Dont have to do OBD1 to OBD2 crap :rolleyes:

Hannys rebuilt mine last month for $1200 :thumbsup: and man shes rev'n nice now :D

[nedgeworth]

y8 end of story :D

[Lukezen27]

y8 end of story :D

Why if he can get a Y1?

[nedgeworth]

Why if he can get a Y1?

Well if he can get a y1 that would be best. But out of the two options he was asking between the y8 would be the better choice :)

[egSi]

there is little aftermarket support for th y1, US z6 parts will not fit it.


however i got told yesterday that z6 parts will fit in the d15.

id prolly go y8 coz parts r easier and kyle(KB) will test em out before hand ;) :thumbsup:

[Lukezen27]

there is little aftermarket support for th y1, US z6 parts will not fit it.


however i got told yesterday that z6 parts will fit in the d15.

id prolly go y8 coz parts r easier and kyle(KB) will test em out before hand ;) :thumbsup:

WTF D16Y1 = D16Z6 no diff apart for the head gasket

Where did you read this trav?

As far is I know all D16Y1 = D16Z6 parts are interchangeable

Hopefully Weq will be able to clear this up :thumbsup:

[kayot1k]

my intial thought was both engine were crap. my final thought = crap engines

:D

[Lukezen27]

my intial thought was both engine were crap. my final thought = crap engines

:D

Gee.. deep analysts :rolleyes:

You must have thought long and hard to come up with that reply :p

[iamhappy46]

Everything on the D15B VTEC above the head gasket is Z6(including the dizzy), with the bottom end being the D15Z1 design, which has been filled with Z6 based internals. It has 9.6:1 compression and a slightly wilder camshaft(more lift & duration on hi lobe)

The US of A has seen many D15B's pulling OVER 120Hp@wheels with I/H/E & ECU mods.

D15B shares so many common parts with the Z6, so doubtful you would be stuck for spares. Finding a D16Z6 or D16Y series will be expensive because wreckers know that they can charge however much they like for them. One wrecker quoted me $1900 for engine & harness for a Z6. I spent under $2000 on the D15B VTEC, wiring harness, computer, fuel pump, timing belt, water pump, oil seals, thermostat, HD clutch + everything else needed for the swap.

Sing the praises of the D15B VTEC.

[Lukezen27]

Everything on the D15B VTEC above the head gasket is Z6(including the dizzy), with the bottom end being the D15Z1 design, which has been filled with Z6 based internals. It has 9.6:1 compression and a slightly wilder camshaft(more lift & duration on hi lobe)

The US of A has seen many D15B's pulling OVER 120Hp@wheels with I/H/E & ECU mods.

D15B shares so many common parts with the Z6, so doubtful you would be stuck for spares. Finding a D16Z6 or D16Y series will be expensive because wreckers know that they can charge however much they like for them. One wrecker quoted me $1900 for engine & harness for a Z6. I spent under $2000 on the D15B VTEC, wiring harness, computer, fuel pump, timing belt, water pump, oil seals, thermostat, HD clutch + everything else needed for the swap.

Sing the praises of the D15B VTEC.

And I've seen lots'a dynos with D16Z6 pulling over 130HP but thats on US dynos (SUS)

Was this 120HP/89KW at the wheels on a AUS or US?

D16Y1 is more powerfull than a D16Z6 anyway :p due to the D16Y1 having a thinner head gasget at stock

[Weq]

d16y1 = d16z6 but a tad more advanced. a few small things has different, but every part ive used so far has fit exactly (ive rebuilt my entire engine). the reason the d15b is lil harder to find stuff for is because rods/pistons are different. exactly. the most supported d-series around is the z6 & y8. Everything else trails by a mile...

In the end, i wouldnt pay over 500 for a complete d-series/box and loom :P another 100 for a p28 :).

[Lukezen27]

d16y1 = d16z6 but a tad more advanced. a few small things has different, but every part ive used so far has fit exactly (ive rebuilt my entire engine). the reason the d15b is lil harder to find stuff for is because rods/pistons are different. exactly. the most supported d-series around is the z6 & y8. Everything else trails by a mile...

In the end, i wouldnt pay over 500 for a complete d-series/box and loom :P another 100 for a p28 :).

Hay Weq

d16z6 but a tad more advanced? can you give me anymore into on this?

[SiR JDM]

What rods/pistons do the d15b use weq? are they hard to find (even stock replacement)? Do any other d-series use the same one?


btw - not to hijack (subrelated) anyone know much bout the LSD that comes with the d15b ?

[IN73GZ]

OMG there is not that much bloody difference, this thread is just going around in circles!

[iamhappy46]

D15B uses Z6 pistons/rings/bearings but using D15Z1 based rods & crankshaft.

LSD is rare as the D15B VTEC was sold in singapore, malaysia, thailand & japan so the LSD boxes are snapped up by local markets for use in other d-series engines(especially turbo conversions)

I found one 4 months ago and it was not cheap(also in singapore so add freight)