Hi,
I purchased a soch zc engine but this thing looks very different from what's currently in my car

I have both engines out already
Main difference is the valve cover only, really has me concerned because there is so many different zc engines and I only ordered a long block so no other identifying accessories are on it
I wanted a 1.6 non vtec sohc zc for my 91 crx
It looks like this one;




and mine has the regular a6 valve cover

there is no vtec solenoid on it
the crank pulley has holes in it, for lightening I assume
It has an external fuel pump on the back of the head!


I know that valve cover is from a d15b
but the block is stamped sohc zc


Do I have a 1.5 sohc zc?

 

thats a carb'd model zc sohc with a mechanical fuel pump on the back of the head with a block off plate...the one in the first pic is a mpfi zc sohc...!!!

 

I'm hoping since the d15b distributor is different, if mine fits. That means I have a 1.6 sohc zc non vtec

 

Is the block and head the same?
I have to swap my manifold onto it so all I need is the block and head to be the same
I did lots of research, I just block off the pump

I think there's just different versions but I'm hoping they're all the same

http://www.honda.co.jp/factbook/auto.../co88-018.html

 

both blocks and head are the same...i think the carb'd version has a different cam but all parts from a d16a6 are interchangable on both blocks...!!!

 

the 2nd pic is not the engine just a example of what's there
it has carb pump but the valve cover is exactly the same as in the 1st picture
That valve cover is also on d15b's
But I'm certain sohc zc do not come in a 1.5 liter

 

http://www.norcalcrx.org/tyson/SOHC_Cam.html

 

http://crxcommunity.com/viewtopic.php?t=5796

 

Ok, I think I just have to swap my cam

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/ordered-jdm-dual-carb-d15-recieved-jdm-sohc-zc-dual-carb-what-do-i-have-2448608/

 

Wait, if you scroll a bit down more in that link I posted, the carb'd cam is the most aggressive?
So I should keep that cam in there.
I don't understand those numbers in the list you posted

 

you dont need to swap nothing over .....JUST....
tranny
intake manifold
headers
dizzy
flywheel

 

yes, I have to swap the cam
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/cam-specs-sohc-zc-1732231/

 

UHMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM ive used `zc about 5 times. never did shiyet to the head/cam. so go head knock yourself out bruhhh

 

FFuuuuuu,I am confused lol
I am just going to check for the carb lobe, car was still on

^hey, did yours ever come with a pump attached?

 

YUPPPPPP.
Looks like a egr with a lever type thing that goes inside head.
infact; all of the 5 came with it and the shop i buy it from gives me the block off plate.

 

It's called a Mechanical Fuel Pump... there is a lobe on the camshaft that it is driven off of. Similar to practically all Caburated Domestics / V8's from the mid-80's and earlier.

 

Is the rest of the cam the same as the mpfi one>

 

this is SOHC dual carb ZC - 104hp

 

yea, I know that, mine is only the block and head, but has the pump attached still.
is the hp difference from different cams or the manifolds

 

i don't know for sure but i would guess from the manifold - from the spec sheets, the ZC carb camshaft has slightly higher lifts than the D16A6, but only slightly - can't find anything on camshaft durations

this is D16A6, D16B2 and D16B6 cam specs:



this is the carbed cam specs:

 

Treat it like a sore dick, don't f@ck with it!!!
I used to import these motors and sell them as factory replacement engines. We sold ours with the blockoff plate but they are the same basic engines. You will not gain anything by swapping cams only the liability that you put it together instead of Honda.
Bolt up all of your parts and you are done.

Also all zc blocks are 1.6

 

c-c-c-comBO BREAKER

Ithink I have a carb zc cam in mine already



I only need to know ONE thing.

Are the cams between single car zc and dual carb zc the same or different.

Would really help for a quick answer please.

Thanks

 

Will the carb cam run ok with the mpfi?
I'm worried about that

 

lol, specs say carb cam is better, al the forums I searched, the people say no

 

I would say don't mess with it if it anit broken but that is just me, think of it this way are you willing to sacrifice the reliability of the motor that you just bought for a potential few HP gain it doesn't seem worth it.