What ECU does the C1 have from factory?

Does P30 work fine?

 

The p72 is the factory obd-1 b18c1 ecu
The p30 is for the del sol vtec(b16a3), The b16a doesn't have secondarys like the b18c.The p30 won't operate the secondarys.
I'm running a p72 on my b16a and I noticed that my car ran on the rich side before I went with hondata. I believe the fuel maps are a little different.

 

b18c1 cams have longer durations and the b18c1 has the dual stage manifold, hence the fuel map differences.

 

Also, you have to be careful when buying because there are OBD1 and OBD2 P72 ecus.
-PHiZ