important

please move thread to off general discussion!


I am debating on what i want to get,i will either get a full d16y7 swap or a full d16z6 swap.Now im sure the y7 has less miles which is a plus,but comes with a dx tranny with is a negative.While the z6 has higher miles,comes with the ex tranny.For future options if i get the y7 i will put a y8 head on it just to be able to keep up in traffic.But i do not have a p28 so i wont even have vtec running in the d16z6 quite yet.So what would you choose and why:

d16y7 full swap
d16z6 full swap

Im staying d series because its easy,and i can keep my ac with no altercations(sp).

any opinions are greatly appreciated!!!!!!!!

99EJ6T

judge them as you want:
1) y7/y8 oil pumps are crap
2) y7/y8 heads have quench pads
3) z6 has the best flowing stock oil pump of d-series motors
4) y7 has vtec sized valves
5) y7/y8 have small ports
6) vtec is useless in a boosted d-series
7) z6 crank has four oiling holes in the crank vs the y7/y8's two holes
8 ) y7/y8 have bearing issues (spinning them)
9) y7/y8 mini will net more CR then a z6
10) y7 has the same design IM as a DPFI d15
11) s20 a/b000 trans has aluminum shifter forks (spares the gear set when they break)
12) s40 a/b000 trans has steel shifter forks (ruins the gear set when they bend)

personally, built for boost z6 block w/ y7 head and a bisi stg.2 cam & bisi springs. and then of course add boost

important

so the z6 sounds like a better choice,im just worried about mileage,i dont want a smoking ass motor.

99EJ6T

depends on if your planning on building the engine or not. if you build it, it doesn't matter which one you start with. just takes some additional steps, but for the price difference for a y7 vs a z6..... four steps to be exact. port/shim the pump, open up the bearings, open up the oiling holes.

however, if you don't plan on touching the block a z6 will be a better engine.

also, a y7 will pull on a z6 when the z6 has no vtec.

important

im staying stock motor,just intake header exhaust.now for the p28,will i need to have the secondary o2 removed as well as the knock sensor,or are they both already disabled?

99EJ6T

huh? what do you have now?

important

its a 93 civic dx,im curious if the ecu will be plug and play.or will i need it to be chipped to run vtec without a secondary o2,and knock sensor.I know for my obd0 pr3 i did.

99EJ6T

you will need to add a sub harness for the sensors. or you could chip the ecu you have now, and add the vtec wires. then tune it.

important

i would like to just run the vtec wires straight to the ecu,like i did in my crx.But i have never dealt with obd1 so im not sure what codes i will be throwing with a p28.

99EJ6T

if you chip your P06 you can just disable the secondary and knock. adding vtec to the P06 is cheap (when combined with a chip service), and it will be just like the P28.