I was not 100 percent sure where I should put this thread. I stuck it here because, well, it's a build thread!
![cool.gif](https://www.redpepperracing.com/forums/style_emoticons/default/cool.gif)
What I'm going to try and do, with some help from the list, is come up with an adapter system for people wanting to run a later model OBD0/OBD1 distributor on their earlier pre-OBD engine. More specifically, the D15A2/D15A3 and the D16A1. I know there could be a half dozen possible combinations for this, so I am limiting it to what I hope will be the most common engines that could benefit the most from being able to have more spark control.
This is where I could use some input from the list. I know what I would do for myself, but that doesn't mean it's a popular decision. I am still learning about Honda/Acura engine and cylinder head codes, as well as the codes of popular distributors. So if I get any of these part numbers wrong, please chime in and correct me.
The engines I have chosen for this project are the:
1. The D15A2 (PE3 cylinder head) carburated 12 valve (Canadian non-CVCC) from the 84-87 CRX/CIVIC (maybe the PEO CVCC as well?).
2. The D15A3 (PE7 cylinder head) fuel injected 12 valve Si from the 85-87 CRX/CIVIC.
3. The D16A1 (HM3 and HM4 cylinder heads) fuel injected 16 valve dual overhead from the 86-87 (HM3) and 88-89 (HM4) Acura Integra.
Did I get those engine and cylinder head numbers right?
Now I know some people run carbs. What I don't know is if they run mechanical fuel pumps off the end of the camshaft like they do on the PEO cylinder heads commonly found on the D15A2. If that is the case, what I want to know is if the cylinder head setup used on the American version of the CVCC D15A2 (PEO cylinder head) has the same distributor mounting as the Canadian non-CVCC D15A2 (PE3 cylinder head). If so, I can just use the PEO I have here in the shop to fit-up the new distributors.
***OR*** do the carburetor people just run electric pumps, using the PE3 head with the short Si cams and eliminate the block that the mechanical fuel pump normally mounts up to?
I am still not 100 percent sure on which distributors to use and would love to get some input on this as well. Here is what I am thinking and why:
For the OBD0 distributor: I chose the TD18U from the 88-91 1.6L CRX. It's a multi-port fuel injected, non-VTEC engine and the distributors are easy to find.
For the OBD1 distributor: I chose the TD41U from the 92-95 1.5L/1.6L CIVIC because it's a multi-port fuel injected, non-VTEC engine and the distributors are also easy to find.
Once I get 100 percent clear on which OBD0 and OBD1 distributors to run, I will start fitting up and cutting aluminum! As usual, I will take lots of pictures so you can follow along and watch me make mistakes! Well, maybe little mistakes.
![tongue.gif](https://www.redpepperracing.com/forums/style_emoticons/default/tongue.gif)
I am also compiling a list of Honda/Acura cylinder head codes for the Wiki as well. Some of you may have already seen my post for the common ECU's and distributors I posted earlier. I put it there after collecting the information from the research I have completed already on this project.
Anywho, any thoughts from the group would be appreciated. Blast away people!
David