[civicegb16]

put d15b1 block with a y8 head in my 91 si to get it running.
i used the si distributer and intake
and i am keeping it obd0 for now
it is running good but is running retarded and the distributer is all the way advanced
any advice?

 

[BryanK20]

eh..timing is off? what ecu are you running? if you want to stay OBD0 and have vtec, youre gonna have to get a PR3 to make it work...

 

[civicegb16]

using stock ecu
not worried about right now just want it to run good
im going to convert it to 0bd1 later but dont have the money right now

 

[civicegb16]

not absolutely sure it is a y8 head
i was told it came off a 98 ex coupe but it is vtec

 

[EJ6Civic27]

not absolutely sure it is a y8 head
i was told it came off a 98 ex coupe but it is vtec

The 6th Gen EX's are Vtec. DX/LX's are non-vtec.:TU:

 

[civicegb16]

i know it is vtec but im not sure if it is a y8 or a z6

 

[civicegb16]

worked on it some today got it running better but it still seems like the timing needs to be advanced some more and the distibutor is all the way advanced now
will a cam gear help me?

 

[DirtyDC4]

If it's a Z6 head, you need a Y7/Y8 cam gear to correct the cam timing.

 

[civicegb16]

checked the code on the head and it is a 99 ex 5 speed
runs sluggish at low rpms but starts to run pretty from about 4000 to 6000

 

[BryanK20]

yea timing is off most likely. If you got the cash, pick up an adjustable cam gear and play with it some.

 

[civicegb16]

bought a y8 cam gear from honda and runs much better

who ever i bought the head from apparently switched it