Swapping a D14 for a D16

[pinarout]

Hi Guys,

I am interested in swapping a D16 motor into my D14 UK civic EK. My question is I guess would this be a simple swap?

i.e:

- Could I use the same tranny?
- I'd need a new wiring harness / ecu wouldnt I being that the D14A4 is OBD2b
- would the motor mounts fit? I'd get some new ones

I'd build the motor from the bench from the bottom up if needed, if I wanted a CR around 10.5-11 would the stock bottom end be OK? being as im after a vtec i'd stick a big cam in there with some stiffer valve springs

This depends on availability of a D16 motor of course, I'd be l;ooking for a Z6 and Y8 so far as I can tell - which other D16 motors are good and cheap?

thanks for any advice! This will be aproject of mine this year hopefully

[94EXa2]

hmotorsonline.com obd1 sohc zcvtec(z6) with low miles/guarentee etc....you SHOULD be able to keep your trans and motor mounts(dont quote me on that)

[pinarout]

i'm looking at this calculator:

Honda D-Series Compression Calculator by ZealAutowerks

I would be looking to build a Z6 ideally around a a crower stage 3 cam and build from the bottom end with:
- P29 pistons,
- standard Z6 head gasket
- strengthened rod bolts
- balanced crank shaft
- shot peened rods?
- 0.01" milled off head, port & polish

according to the calculator that would yield CR ~ 12.4. In the UK pump gas is 95 octane - would this run reasonably? obviously I could run 100 octane if I prefered but I wouldnt want to do this always!

would 8500rpm be reasonable for this setup or will I need more revs than that to get the best out of the cam? This would be a daily driver

I would appreciate some input here, the crower 3 cam looks badass but from what I can gather it need a very well flowed head, making it ideal for a Z6 project

[ONEuglyEG]

Originally Posted by 94EXa2

hmotorsonline.com

that would be one hell of a shipping charge, pretty sure there are local engines in the UK for less.

you shouldnt have an issue with swapping from a d14 to d16. might want to look for members in the UK that have completed the swap to be 100% sure.

[pinarout]

so, are you saying that I should just be able to bolt on a D16Z6 / Y8, provided that I change the wiring harness / ECU?

[Jyizorz]

I am not sure of the laws in the UK, but "technically" swapping the d16z6 into the EK would be illegal in the states. You would also have to change your wiring harness out, because the plugs on the d16z6 would be OBD1. I'm not sure if there is a difference in the wiring harness from OBD2 and OBD2b. In both scenarios, you will have to change your ECU.

IIRC, Your motor mounts will work for any 92-00 Civic D-series motor.

I'm sure the UK is way cooler though.

[pinarout]

Originally Posted by Jyizorz

I'm sure the UK is way cooler though.

dont bet on it!


From what i've heard the Crower stage 3 is poor on torque even with well flowed heads, is this true? Would I get reasonable MPG when just cruising town and so on or would I be better with a stage 2 in this case?

What woudl be the power differential going from a crower 2 -3 (rough numbers?)

[richy]

If you werent worried about the vtec you could use any number of d16's from various mid 90's rover 200/200coupe/400.they would be cheap and readily availiable over here in england.

[pinarout]

thanks for the replies so far guys. I just need to check that the gearbox on my EK will fit with a Z6 or any other D16 motor

my EK4 has a S40 tranny. Would a D16Z6 fit with this - or would i need to change the gearbox and axles too?

[Eximious]

If you check out Moates or Xenocron IIRC you can buy wiring harness converters to change the dizzy leads thus allowing you to use the existing dizzy. It may be cheapoer than a change but you would have to research the OBD2 conversion more...I run obd0.

[DanSej6]

Pretty sure you mean EJ9 as EK4 is the VTI :P

S40 is the standard code for all 96-2000 D-series boxes.
S20 is 92-95.
You'll have a S40 A0000 box, small bearing, long ratio box.

But to answer your question, your current driveshafts and box will work.But a Z6 would be better (shorter ratios, quicker acceleration)

[hondanickx]

Originally Posted by DanSej6

Pretty sure you mean EJ9 as EK4 is the VTI :P

S40 is the standard code for all 96-2000 D-series boxes.
S20 is 92-95.
You'll have a S40 A0000 box, small bearing, long ratio box.

But to answer your question, your current driveshafts and box will work.But a Z6 would be better (shorter ratios, quicker acceleration)

Fail....
the ratios of the D14a4 tranny are shorter than most S40 /S20 trannies.
They are pretty close to Z6 ratios.
You can swap a D16z6 into a EJ9(Not EK4) without a problem.
BUT you need to convert your engine harness to OBD1 cause the D14a4 is OBD2X (SFI) .You can't use any existing conversion harnesses cause they don't exist for the D14a4.Go to Dodo Upgrades and you have a whole guideline to convert this engine harness ,do a Mini me ,intake manifold swap ,... All D14 related.

[pinarout]

provided i can use the D14 gearbox with a Z6 flywheel / clutch / motor thats where id go to

as for the harness i'd just use a Z6 harness