Finding the right ecu
 

Hello all, first time user just now getting my feet wet in the world of Honda! I have a b18c1 from a 98 gsr that I am going to put in a 97 civic lx with an automatic b16. Just wanted to know if anyone knew of an obd2 auto b series ecu with v-tec that I could use for the swap. Thanks

Re: Finding the right ecu
 

there was none...at least USDM

all GSR and SI/Type R were manual trannies.

get an obd1 ecu and chip it. get an obd2 to obd1 converter and your set

Re: Finding the right ecu
 

If it has to pass emissions it flat out can't be done with an automatic. There are no compatible USDM ECUs and JDM OBD2 ECUs wont communicate with a scan tool. Above and beyond that there are clearance issues that require cutting and notching the passenger's side frame rail in a '96 - '00 Civic, as well as fabbing up an upper transmission mount and rear T-bracket. No ECU really works right, other than a JDM SiR-G ECU with the matching transmission and TCM (and wiring the TCM is a royal pain in the ass) You could use a JDM B16A automatic ECU and transmission (B16As didn't typically have a TCM) but the ECU wont have the right fuel and timing maps for the engine.

It's very hard to do this swap and not have issues controlling the transmission. It is significantly easier and cheaper to just swap in a manual transmission.

Re: Finding the right ecu
 

well nuts. I have been planning to do this for almost a year and have been doing nothing but research. It is until this time, I have believed that this was feasible. But tonight, I have been proven wrong. The only reason I am trying to go with an automatic is because it is a rarity to see an automatic Vtech swap and also the main reason is because it is for my wife. If you have any more advice on my situation, I encourage your input. So far, we have established that I have a '98 B18C1 GS-R and it needs to go into a '97 Civic Lx. As far as the ECU's I have on hand, I have a Hondata tuned P28-S100 and a P72-A04 and complete wire harnesses for the Civic and the GS-R. Thank you again for your time and interest in my posts.

Re: Finding the right ecu
 

What is a good ecu to run in a fully built ls vtec on boost gsr head gonna b running on e85 putting out close to 600hp. Can i run a hondata s300 or what yal think would b sufficient? wide band sensor big map sensor the works let me know

Re: Finding the right ecu
 

^super thread jack. but yes the s300 would be the premium choice for tuning.

Re: Finding the right ecu
 

Sorry dude, this swap just isn't likely to happen. It would be much easier to just teach your wife to drive stick. Here's a thread from a couple of years back that more or less shows exactly why this shouldn't be attempted https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/honda-gsr-swap-getting-pita-2364737/

Hondata only supports manual transmissions, also you wont be able to use a P28 with an Integra automatic tranny, even if it's an automatic P28, they're controlled differently. It will control a JDM B16A OBD1 automatic tranny, however you can't adjust shift points, even if it's tuned. You can't use that GS-R ECU with an automatic either. When doing an engine swap in a '96 - '00 Civic keep the original harness and modify it to fit the engine. Btw the GS-R harness is worth something to someone, i'd sell it.

Re: Finding the right ecu
 

I challenge u to be revolutionary: put k-pro in it

Re: Finding the right ecu
 

thanks im trying to get all the feed back i can and so far y'all have been helpful with making my decision