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Dpfi to mpfi swap D15b7

10363 Views 20 Replies 9 Participants Last post by  Pata
I have a 1991 Honda Civic std and id like to get so better performance out of it. The previous owner put installed D15B7 engine and 5spd transmission from a 5th gen DX but, didn't swap to mpfi, leaving the old std dpfi setup and its pm9 ecu.

I have reed many dpfi to mpfi swap forums but should i get the obd0 4th gen Si parts (will they even work with this engine?) or should i upgrade to obd1 and get what the D15B7 engine came with?
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so i can install the Si cam into my D15B7 but where can i get(what car?) can i get the Y8 cam gear from? i was going to go to a junkyard to get the parts soon.
also how much would it cost to get these parts for the junkyard like the ecu, manifold with every thing on it, and the distribor.
Good luck getting a good junk yard dizzy. Make sure it has the cap on it and the seal isn't dry or broken. If so the sensors in their are probably damaged, if cap is tight and well sealed its a good bet. I'd take the cap off and look at it before you buy it though.
If the Si dizzy was bad could i use one from a 5th or 6th gen odb1 dizzy and still run obd0?
I don't want to spend to extra money to convert to obd1 untill i have to.
Alright thank you.
ok so i when to the junk yard and all i found was a 91 ex automatic with a d16a6 eninge so i couldn't do the mpfi swap but i did get the cam but i couldn't find the y8 gear yall were talking abt so i just grabed the a6 gear y wont it work (or will it)? also if i do get an adjustable cam gear what will i have to set it to?
what u need is:
pm6 ecu (88-91 civic/crx si)
td-02u si distributor
u need a d16a6 intake manifold with injectors n resistor box. or u can use a d16z6 or d16y8 intake and swap the injectors from the d16a6.
si throtle cable.

here is a diy for the a6 cam in the b7
DIY D15b7 installing USDM D16a6 Cam for factory upgrade
and here's more info on the dpfi to mpfi swap
DX,STD (DPFI) -> Si,HX (MPFI) wiring
im not swaping the engine to mpfi (ill be doing tat down the road tho) all im doings is swaping cams(just don't have the money right now :/ for the mpfi swap).

i should be getting an adjustable y8/y7 cam gear tomorrow to swap the cams.
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