Help Needed, d15z4 block on d15b vtec head
 

Dear HT

i live in the middle east, our civics are little bit different from USDM cars, i have a 99 civic with d15z4 engine, it looks like d16y7 engine with the filter box on top, i'm getting d15b vtec head from jdm 94 civic, i wanna know if i can use the 94 intake manifold on my engine? i read somewhere that i have to splice 2 or 3 wires ......ect. i have no clue,

1)if possible a picture of what should be done
2) what TB should i use.
3) will i have any issues using d16a pistons p29?

Thanks

Re: Help Needed, d15z4 block on d15b vtec head
 

oh and another thing, can i use obd1 injectors and rail too?!

Re: Help Needed, d15z4 block on d15b vtec head
 

anybody?!

Re: Help Needed, d15z4 block on d15b vtec head
 

You can use the intake manifold but you will need to use an OBD1 ECU as well and rewire the IACV. You can use the OBD1 injectors and fuel rail but you will need to splice on OBD1 injector clips. Assuming the car is OBD2B like USDM '99 - '00 Civics here are the instructions for converting to a 2 wire IACV:

http://www.ff-squad.com/tech/wiring/wiring.99-01.jpg
http://www.ff-squad.com/tech/wiring/...-01_b-plug.jpg

Re: Help Needed, d15z4 block on d15b vtec head
 

Hi. the P29 piston is Ok for a set-up. I check with a web to calculate the compression ratio. With the D15 block, D15 crank, D-15 rods ( 134mm) and the P-08 head ( D-15 Vitec/D16z6, camber volume 34.60cc) you get a 10.2:1 C.R. with the regular head gasket ( 1.2 mm ), good for regular gasoline. With the D-16z6 metal head gasket ( 3 layer , 0.9mm) you get 10.5:1 C.R. good for 91 oct fuel ( 95 oct RON ). With the D16y8 head gasket ( two layer metal, 0.6mm) you get 10.8:1 C.R., good if you plan to buy a hot street cam and 91 oct gasoline.

Do not use the D16z6 rods , they are to long 137mm for the D15 block ( C.R. will be over 11.5:1) and they can only be use in a D-15 Vitec crank from Japan because they have a bigger journal diameter.

The D16y8 head ( Vitec) have a smaller camber (32.80 cc ), so you get a higher C.R. Check the head code to be sure which one you have. If your head is from D-16y8 better used the regular head gasket from a D15 NON Vitec engine ( not metal, 1.2mm) for a 10.60:1 C.R.

You can check the C.R by youself in this Web: www.Zealautowerks.com/dseries.html