Hi, I am currently running a P06 ECU with my 1999 b18b engine and everything is running great, idle etc.... Now my question is, would I see any différence in Performance if I put in a OBD1 b18b ECU (wich I don't remember the alias code). Would it be noticeable??? And at the moment, is there any harm made to the engine when running the incorrect ECU (like running lean etc....). The fact is I just cannot keep spending and spending anymore on the car, and if the difference is huge between both ecu, I will reconsider my choice.

Any input would be great,

Cheers

 

they are basically the same except the Ls has more aggressive fuel curves slightly above the dx. just chip the dx and you'll be fine

 

you're prolly running pretty lean right now, i think the fuel maps are way off

 

"dr. do you concur?"

I concur with what the others are saying.
You can run on the DX ecu, but it will be a bit on the lean side....

Do you by chance, hear any pinging when you 'put the pedal to the metal' ??

If you have a chance to use an actual LS ECU (PR4 or P75), you might notice it will 'feel' almost the same or slightly better. (plug time) If you need your P06 ecu reprogramemd with a close-to-stock LS program, I can help you in that deptartment, as I provide ecu reprogramming services for jdmhondaparts.com. Check my signature for more info on that if you're interested.

 

Sorry... but what is pinging? How to recognize ?

Thanks

 

its a unique ticking noise you can distinctly hear from the engine when you're on the throttle, usually when you're hard on the throttle. I think there's some sites with a sample sound file...I'll try to find one..

and no, these are not the same ping you'd hear in your engine bay:

ping 1
ping 2

here's some info on pinging/detonation also:

http://www.allfordmustangs.com/Detailed/60.shtml

You can also check your spark plugs for symptoms of running lean. If the plugs are an ashy-grey color, you're running lean.




[Modified by Katman, 11:30 AM 12/18/2002]

 

You are so lucky! That's RAD! The Honda god KATMAN has posted in reply to your post! You are soooo lucky. I can't wait until the FF-Squad web site is back up! I can hardly sleep because of all the anxiety I have built up inside just WAITING for the new site!

anyone know where I can get an autographed photo of Katman? I want to get it framed and hang it on my wall. That would be sooo cool!

 

James, you can be a real idiot sometimes, and right now, is one of those times.

 

Ok, but, is it dangerous for my engine?

 

Detontation/pinging is said to be dangerous in the books, but from my personal experience with natrually aspirated Honda motors, its only an issue if you have a high compression engine, which is around 11.5 or higher, and run low octane fuel. I dunno anybody who built their NA motor up to 11.0+ compression and isn't using 91+ octane.. That's just absurd if they don't.

I've also never heard of any stories of a built up NA B or H-series engine that died of detonation/pinging. I think it's more of an issue when you force induct upon either type of engine (B or H-series)...or any engine in fact, if its not built for forced induction from the factory.. Natural Aspiration is more forgiving than forced induction when it comes to tolerance thresholds.

If your motor.... mainly the engine block.. is untouched and totally stock...you shouldn't worry about a thing, even if you run 87 octane. The compression on a stock B-series non-typeR engine's are range from 10.0-10.6, and is considered low-to-medium compression ratio, which can handle low octane fuel, but if you run premium petrol, you have nothing to worry about at all to begin with ...




[Modified by Katman, 10:20 AM 12/19/2002]