6 replies to this topic

[P.John]

Hi there!

I hoping you can help me:

I have 3G civic with D15A1 (carb) in it and donor 3G civic with D15A3 (PGM-FI). 

Will it works if I swap D15A3 head (+manifolds, wires and fuel system) on D15A1 block?

[kedwards]

Yes, though compression ratio will be lower, since the D15A1 piston tops have more recess.

[gtpilot]

It is a lot of work to convert it over to PGMFI - see if you can find a CDM cam from the PE3 head, put it in the Si head and retain your carb/manifolds and bolt it all back together?

[P.John]

Yes, though compression ratio will be lower, since the D15A1 piston tops have more recess.

So it gonna work but with less power? 

 

It is a lot of work to convert it over to PGMFI - see if you can find a CDM cam from the PE3 head, put it in the Si head and retain your carb/manifolds and bolt it all back together?

But I don't want to retain carb

[kedwards]

So it gonna work but with less power? 

 

But I don't want to retain carb

 

Yes. It will work, with a little less power. Change the pistons to Si pistons, if you think you need the higher compression, but you should be fine.

[gtpilot]

If you have a donor d15a3, why not swap over the complete motor?

[P.John]

If you have a donor d15a3, why not swap over the complete motor?

It may couse problems with registration (engine number will change)

Now i research how to do swap legally in my country and gonna choose one of these ways