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Brokedick Millionaire
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Updated measurements in post #9

I had to measure the duration the the cam lobe, didn't have a head setup to read at the valve

Rocker Ratio
Intake......1.63
Exhaust....1.87

92-95 D15B7

Lobe lift Valve lift Dur. @ .010" lobe lift
I .198" .323" 224
E .165" .309" 226

89-91 D16A6

Lobe Lift Valve lift Dur. @ .010" lobe lift
I .225" .367" 230
E .192" .359" 224

Crane 251-0012

Lobe lift Valve lift Dur. @ .010" lobe lift
I .243" .396" 238
E .205" .383" 234
 

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Brokedick Millionaire
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Discussion Starter #2
My notes from late 1998.........

1993 DX factory cam
Intake base 1.218 lobe 1.420 lobe lift = .202"
Exhaust base 1.260 lobe 1.426 lobe lift = .166"

1990 Civic Si A6 facoty cam
Intake base 1.220 lobe 1.445 lobe lift = .225"
Exhaust base 1.262 lobe 1.455 lobe lift = .193"

Gude 88-91 CRX Si HCCS07 regrind
Intake base 1.135 lobe 1.385 lobe lift = .250"
Exhaust basr 1.170 lobe 1.400 lobe lift = .230"

By using Gude's published specs I came up with (seven years ago!)
Intake rocker ratio 1.64
Exhaust racker ratio 1.86

Looking over Crane's cam card specs on their website last week, they list
Intake rocker ratio 1.63
Exhaust rocker ratio 1.87
(pretty damn close!)

Mine you I was using a PLASTIC dial caliper from RCBS from reloading ammo.....



"Fiberglass reinforced super polymid construction. Range of 0-6"/0-150mm. Direct .001" readings. Gradations .001" increments with 0.100" per single revolution of dial; 1.0mm bar scale. Dial adjustable to zero. Four-way measurements: outside, inside, depth and step. Comfortable friction thumb roller opens and closes caliper. Large, easy to read black numbers and markings on white background. Case maximum and trim length chart included. Fitted clear plastic storage case. Imported."
 
C

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hmmm...who said the a6 cam fits into the y7?

while you are at it, you can try putting a vtec cam in your y7, that will give you mad crazy hp and VTECH yo!

....NO! vtec cam will not fit into the y7 nor will the a6 cam.
 

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Brokedick Millionaire
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Discussion Starter #4
HumanResource said:
Hmmm
makes me wanna send you this 92^ SOHC ZC cam I have.
I already know the specs, nothing special :) MAybe a little difference on the LSA, but that is about it.
 

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If I could I'd send you
88-91 SOHC ZC MPFI cam
88-91 D15B Single Carb Cam
88-91 D15B Dual Carb Cam

92-95 SOHC ZC non VTEC MPFI cam
92-95 SOHC ZC Single Carb Cam

96^ SOHC ZC Cam

So far all i got is the 92^ NV

Doing the research on the 88-91 vs. the 92^ from the Honda.jp sites
the 92-95 engines are tuned for low end torque (max Torque at 3000RPM)
while the earlier SOHC ZCs Max Torque were at the above 5K range.
Both rated at 120 ps @ 6300 though
 

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Brokedick Millionaire
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Discussion Starter #6
Time for a update.......

This time I used the cam checker to measure off the retainer, direct read. more accurate.........

SOHC non-VTEC cam specs

D15B8 CX 8V

Lift @ valve
In = .377
Ex = .358

Duration @ .050"
In = 220 deg
Ex = 200 deg


D15B7 92-95 DX 16V

Lift @ valve
In = .321
Ex = .305

Duration @ .050"
In = 190 deg
Ex = 190 deg


D16A6 88-91 EX/Si 16V

Lift @ valve
In = .368
Ex = .356

Duration @ .050"
In = 190
Ex= 190


Crane 251-0016

Lift @ valve
In = .421
Ex = .414

Duration @ .050"
In = 216
Ex = 218

NOTE: Some of the numbers are different than before, three reasons.

1) Error reading the first time right off the lobe
2) Error reading off the retainer (had to get it dead straight!)
3) Normal engine wear!

Anyone has a cam they want to measure up? Only gonna cost shipping. I would like the cam makers to submit their grinds for testing, I promise to be impartial, even to Bill Gude. I did ask Wil @ Exospeed, but he hasn't posted since, hope I didn't scare him away!

More info here.......

http://www.honda-tech.com/zerothread?id=427814&page=1
 

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Brokedick Millionaire
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Discussion Starter #7
OniFactor said:
random question.. how would i compare duration numbers measured at .015 to these?
You can't. Industry standard is .050" valve lift with zero lash.

where's the sohc zc?
Someone ship me one so I can prove the myths wrongs.
 

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Someone please sticky this! I've been searching for this kind of info for a while, but the search function on this site just doesn't find it.

BTW, the specs I have for the Y7 are:
max cam lift, I/E = 0.207/0.239
net valve lift I/E = 0.310/0.359
dur (crank deg) I/E = 174.9/185.8 (not sure how to convert this to adv. duration)
 

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Just copied this from the `91 CRX Service Manual
 

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Brokedick Millionaire
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Discussion Starter #12

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Brokedick Millionaire
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Discussion Starter #13
Dweezil said:
Just copied this from the `91 CRX Service Manual
not all the info is there.........where is the DX info?

And the HF doesn't have that big of a intake lobe.....

Can't always trust the manuals, there are typos :)
 

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Here's the service manual for an EG, and it shows the B7 cam as being larger than either the A6 or B1/2 cam. Of course it dosen't account for base circle either, and dosen't show LSA or duration.
 

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Brokedick Millionaire
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Discussion Starter #15
Like I said, can't trust the manuals..........

Like the 4.33 FD I have in my 93 DX five speed transmission..........what the manual stated.
 

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Here's something that does make it interesting;

14111-PM5-A10 is in the `91 Civic DX
14111-PM5-A00 is in the `91 Civic STD

Nothing shocking there, slight difference but probebly insignificant.

14111-PM6-A10 is in the `91 Civic Si

All of these are 5 speed Federal emissions, checked on both Civic and CRX. Both use the same part number.

14111-PM5-A50 is from the `91 DX Auto Transmission. If the service manual is correct it looks like that uses a slightly larger exhaust lobe.

And just to throw a wrench in everything the D15B7 uses 3 different cams, but dosen't say what was used in what. They are:

14111-P06-A00
14111-P06-A80
14111-P06-A90
 

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Brokedick Millionaire
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Discussion Starter #17
there are differences, can be measured with a dail caliper.
By 91 likely the STD was using the DX cam,

14111 = cam
PM5 = motor series
A = check digit
00-90 = possible revisions, update/backdate parts.
 

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I get that, but other than the manual cam, I'm just wondering what the actuall differences are, like LSA and duration.
 

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Discussion Starter #19
likely, nothing. Every 16v non VTEC cam I measured @ .050" had 95 degrees duration, or 190 degrees crank. I could have gotten a more accurate measurement IF I had the degree wheel on the crank instead of the cam.
 

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D-series Janitor
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Just got done measuring my 88 d15b2 cam . . .

With the old $20 vatozone digital micrometer, the intake cam lobe lift was .223" (1.217 base, 1.440 max).

Exhaust checked it at .184" (1.446 max, and 1.262 base, weird I know)

So at the valve you get .363" I, .344" E
 
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