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Discussion Starter · #1 ·
This came up in another thread, I thought I would copy it over here and add it to the FAQ, so here it is. This was originally complied by tyson here.



JDM ZC Sources

1984-1987

DOHC ZC MPFI 9.3 CR 135 ps / 6500 RPM (Integra Gsi, Rsi, Civic / CRX Si)

DOHC ZC Single CARB 9.3 CR 115 ps / 6500 RPM (Integra ZS, LS)

DOHC ZC MPFI 9.3 CR 120 ps / 6500 RPM (4dr Integra Gsi)

DOHC ZC SINGLE CARB 9.3 CR 100 ps / 6500RPM (4dr Integra & hatch GS, ZS)

1988-1991

SOHC ZC DUAL CARB 9.1 CR 105 ps / 6300 RPM (Integra ZX, RX)

SOHC ZC MPFI 9.1 CR 120 ps / 6300 RPM (Integra RXi, Txi, CONCERTO)

DOHC ZC MPFI 9.5 CR 130 ps / 6800 (CIVIC/CRX Si) DYNOS

1992-1995

SOHC ZC DUAL CARB 9.1 CR 105/6300 (PS/rpm) (Integra ZX)

SOHC ZC MPFI 9.1 CR 120/6300 (PS/rpm) (Integra ZXi)

SOHC ZC VTEC MPFI 9.2 CR 130/6600 (ps/rpm) (Domani Vi)

DOHC ZC MPFI 9.5 CR 130 ps / 6800 RPM (Civic Ferio RTSi and Special Edition Civic Si) DYNOS

1996-2000

SOHC ZC MPFI 9.4 CR 120ps/6400 RPM (Integra)
 

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Discussion Starter · #5 ·
I think the issue is due to actually knowing the ZC cam specs. There's a common misconception that the ZC cam is significantly better than the A6 (I think mostly held by ZC owners), so when you see the real numbers it's a bit of a letdown.
 

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personally i think the majority of the RATED hp difference between the jdm zc and a6 is the exhaust manifold, after the conversion between ps and hp.

a stock a6 with typical ihe will dyno around 110 at the wheels. AT THE WHEELS. on a dyno jet no less. its obviously underrated as it is at 108 ENGINE hp. whatever...

i have a y8 cast 4-2-1 manifold on my otherwise stock (even using the stock full intake system with the center snorkel) 88 a6 woke up a lot of peppiness on the 230k mile engine.
 

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without the number what is considered where durations starts, the info is sorta meaningless.

The only number that stands out is the ZC MPFI Intake lift, .2330" vs. .2275"

I've always offered to compare a known ZC cam verus either og my A6 cams, but no one offered it up.

I'm not doubting Kwicko, but I know the meauring routine very well.

My first setup YEARS ago.......





The last time I measured at the valve head





 

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yes, it will always be debated.......

http://www.d-series.org/forums/showthread.php?t=22640

oh yeah, anyone have a SCCA IT tech book???? I'm not talking thr GCR, but the tech book that has all kinds of specs in it. Info got back to me that my stock (USDM) cam measurements were within tolerance with SCCA specs, tolerance from normal wear and such, esp. the base circle measurments which would show any regrinding attempts :)
 

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"lift starts at" was that .001", .010", or what?

What was the base circle dimensions?

I really wanted to know myself......becuase if there wasa better cam for my D15B7 I wanted to try it.

Until I tried Crane 251-0012 and 251-0016 cams.
 
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