OBD systems? & interchangeing heads / Blocks

[Sexc86]

Hey guys

Basically strait up, what are the following Engines OBD ?

D15b7 (eg) 1.5 SOHC non vtec
d16y1 (eg) 1.6 SOHC Vtec
D16y4 (ek) 1.6 SOHC non vtec
D16y8 (ek) 1.6 SOHC Vtec
D16z6 (unsure.. probably eg.. US spec) 1.6 SOHC Vtec

Now when interchangeing different heads with blocks what is the go with wireing systems .. sensors... Dizzys etc?

Say if you put a obd2 Head in a car with a obd1 block & loomb? what is the go? is this still fine to run with that loomb or do things need to be changed

is it ok to run say a obd1 dizzy on a odb2 head.

have trouble getting my head around all this mixing and matching. if anyone could clear some stuff up for me in detail.. consider themselves with a few REP points!


Regards Lyle

[lenz]

if your planning to use a y8 engine your obd1 dizzy will fit and with the rest will fit accept your injectors i think and might add a knock sensor but use your eg loom. so basicly you can use watever but use your eg loom as ek loom are diff

[nd55]

US law to blame.

ODB2 mandated the crank angle sensor be placed on the crank.

ODB1 has all this stuff in the dizzy.

Also, the toothed wheel for the angle sensor different tooth counts.


MSD and password JDM make a plug and pray cable.

http://www.msdignition.com/2006/06-25.htm


Local laws seem to follow US laws after a fashion, but there is a few years delay and manufacturers chose whatever combination of hardware available in the mean time.


Australian D16y4 (ek) 1.6 SOHC non vtec has a local specific bastard ECU.

Four injectors driven off two cables, from memory.

D16Y8 (and maybe Y5) use a knock sensor.

Also, different dizzies use slight altered mounting, so you might only be able to use one bolt to hold it on.

(Not 100% sure). A D15B7 dizzy is ODB1 but will bolt up to a D16Y8 head.

D16Y1 == D16Z6. Intake ports are a straight short to CC.

D16y5 and D16y8 are the same casting, the valve train is very different.

D16Y5, D16Y8, same casting. Intake ports are bent to promote swirl. Flow slightly less. Better for emissions and economy. Have quench areas in CC to improve combustion.

If mixing and matching heads, take care with the pistons and the resulting compression ration. The quench clearance will need to be 1mm to be effective.

D16Y5 uses EGR which the other heads don't.

US spec y5 and Aus spec Y5 use very different intake and exhaust manifolds.

Y8 is intake vtec with low lift and high lift lobes.

Y5 cam is single profile lobe, slightly bigger than Y8.
The secondary intake valve either does nothing or locks to the primary valve at about 3000rpm (Vtec-e).
Y5 rocker arms use roller tips for reduced friction.

Nick.