ECU upgrade for my H23 - Honda Prelude Forum

Qveon · 07-17-2002, 11:44 PM

Is there an ECU upgrade for my H23 motor? Can you tell me about it or link to it if there is.

AND if i add things like intake or exhaust, do i need to reset the computer so it adjusts to the new settings? If so how?

yellowh23a · 07-18-2002, 12:33 AM

To reset your ECU, just remove negative battery cable. As for an upgraded ECU ... Gude makes one to go with their head package ... what exactly do you have done to your car? If you have i/h/e .. etc, pick up an Apexi S-AFC and have it tuned by a shop with a Dyno. It allows you to adjust your Air : Fuel ratio in 500 rpm increments. I'd also recommend getting a fpr and adjustable cam gears and have it all tuned and have the car dynoed. Trust me, you'll be really happy after you have the car tuned and find out it makes ... 13 more hp than before just by having it tuned ... made me happy! =)

-Mike

Z · 07-18-2002, 12:40 AM

I have an ecu for the h23a, its programmed by Gude and gives you a higher redline (about 9k) and better fuel/air ratio throughout all rpm levels...

i think this is the only ecu upgrade you can do for the h23a... i didn't have a chance to try it out myself, i blew my h23a before i could even install the ecu.

Anyone interested, i have it for sale... make a reasonable offer please!

AuSSI · 07-18-2002, 05:04 AM

9000RPM in a stock H23 = BOOM!

Z · 07-18-2002, 01:01 PM

Well, if you build your motor, you can run that high, but its not recommend that you dot hat

Qveon · 07-18-2002, 10:47 PM

So if i installed the new ECU and my redline is 9000, what is the highest i can run it before BOOM?

Z · 07-19-2002, 12:17 AM

i wouldn't go past 7500 under a stock h23a

sporttheimport · 07-19-2002, 10:03 AM

Where can I browse through all the things Gude makes for the H23? I am really interested in their head package and cams. What kind of gains would I get from Gude cams in my H23? anyone have a clue?

later,
tim