b.serious

hiii.. i registered with sohchonda recently for the bare fact that i wanted info about the JDM D15B cam.. i came up with a post in which user 4Dr has given pictures of d15b vs d16z6 cam to prove that the d15b cam is infact different cuz it looks different due to thinner lobes.

http://sohchonda.com/v-web/bul...art=0

i went to my local junkyard today to look out for a d15b vtec motor so i could get the cam and compare it against my z6 cam. heres what i found . it really is surprising...


i found 5 D15B Vtec motors with head stamps PO8-3. we took the cams out from all the 5 motors and the cams were just like the z6 cams. i mean the lobe wasnt thin at all.. we measured the lobe height and it was exactly the same as the d16z6 cam lobe height as given in the honda workshop manual..

what took us with surprise was when we opened up three d16z6 motors with head codes PO8-6, PO8-3 and PO8-5

we found the lobes to be thin in PO8-6 and PO8-5 (it is exactly the same as the d15b cam which 4dr showed in his post) and the PO8-3 z6 head had the cam with the fat lobes.... exhaust lobe heights were the same (38.00mm) for all the cams (d15b and d16z6) but the cam with the thinner lobes had intake lobe heights greater by about 0.2mm for all the three lobes.

now surprisingly i came back home and opened my d16z6 stamped PO8-6 and found that it had the same cam with thin lobes. ( i really am confused) is there a possibility of a JDM D16z6. cuz the junkyard guy told me that these engines come from singapore....

but the PO8-3 Z6 head had the cam with the fat lobes and the intake lobes were lower in height than the other z6 cams with thinner lobes. aggggghhhh

so ive eye witnessed FOUR D16z6 engines and FIVE d15b engines... heres the conclusion

1. all d15b's had the same cam and it had lobe heights exactly the same as a d16z6 given in the honda workshop manual.

2. 3 d16z6's had the cam with thinner lobes which 4dr was reffering to as the d15b cam and one d16z6 had the same cam that was found to be in all the d15b's

3. the cam with thinner lobes has the same lobe height for the exhaust and infact has larger lobes for intake by 0.20 mm (for all three lobes)


what do u say? i really am confused

b.serious

LOL.. this means that the d15b cam is no different from the d16z6.....infact there could be a different version of d16z6 running the cam with thinner and higher lobes for the intake.

this starts another mystery for the d16z6 with agressive stock cams LOL...

No-Gi

did you get the code written on the dizzy side of the cam? My D15b cams says C330 but I have heard of others saying something else.

v-6 hatch

you most likely pulled a vx motor ... not the jdm d15b

No-Gi

BTW, this post sucks w/o pics...

b.serious

i cant be wrong.. am talking about the d15b motor not the d15z1... .. and ill get some pics and also the code on the cams .. l8rz

v-6 hatch

so ur tellin me u found 5 jdm d15b otors in the junk yard .... i ain't buyin it

spectacle

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v-6 hatch &raquo;</TD></TR><TR><TD CLASS="quote">so ur tellin me u found 5 jdm d15b otors in the junk yard .... i ain't buyin it </TD></TR></TABLE>

especially in alabama lol...PM more details, I'm coming up to Selma/Montgomery area tommorow

b.serious

not in AL.. am on vacations from school and i found these motors i took the pics.. someone mite want to host for me.. PM the email address ill send the pictures..

the conclusion is d15b & d16z6 cams are both the same.. however theres a different z6 which has a bit agressive cam. measurements below (cam lobe heights in mm)

D16z6 D15B D16z6(thinner lobes)

EXHAUST 38.00 38.00 38.00
Intake:
PRI 35.86 35.88 36.15
MID 38.03 38.08 38.20
SEC 36.12 36.14 36.15

codes for cams with thinner lobes
d152
dw38
df46

Otherwise (D15b & d16z6 normal cams)
B537
b539
b132

so cams starting with code number B*** is the normal cam found in the d15b and d16z6.... and cams with code starting with D*** are the agressive cams ONLY FOUND IN D16Z6




Modified by b.serious at 4:08 PM 2/11/2007

v-6 hatch

my d15b a tottally differnt number .... so i dunno

b.serious

take ure valve cover off and take a look from the intake side.. you can actually see the intake MID lobe very clear... let us know if its thin or thick...

for reference ve a look at the picture of both the cams in the link below...

http://sohchonda.com/v-web/bul...art=0

am assuming u bought the complete motor not just the cylinder head

v-6 hatch

yeah i had a complete motor and over sea's they have some weird motors like the d18 so maybe it's a differnt motor but who knows .... i don't have my d-15b anythin any more all i got is the vavle cover and head casing eveyrthing is biger and better

b.serious

bottom line.... d15b & z6 cams are exactly the same

hatchinprogress

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by v-6 hatch &raquo;</TD></TR><TR><TD CLASS="quote">so ur tellin me u found 5 jdm d15b otors in the junk yard .... i ain't buyin it </TD></TR></TABLE> yeah what us junkyard has 5 jdm's layin around?? are you sure your reading the code right?

D15powerd

I found this **** out like a year ago. Look up my posts on SohcHonda, particularly the discussion i had with 4Dr. It's the exact same cam, i think the cam he got was from an OBD2 D15B or something. I did both measurement with a dial caliper and they came out to factory specs of a D16Z6, right on the dot. And those that say the D15B is better than the CompCams stage 1 or even 2 cam...are ******* retarded.

lek9l

D15b cam is not the same, I will create an article and take some pictures to compare my old d15b vtec against d16z6 from ex. The D15b cam has advance duration and timing, and its vtec and exhaust lobes are more aggressive by .10 mm in lift. The D15b has thicker lobes while the d16z6 has thinner lobes. Easy to tell, the cam gears are the same.