Stock ecu question (p13)

[Mishakol129]

Hey all. I have a real technical question regarding an ecu I'm purchasing from a sell on HT. He says it was converted from at to mt, and that the knock sensor was removed. What I found strange was how a board on the ecu was missing.

This is what I'm talking about. Its this board in the upper right corner:



And this is his OBD I p13 ecu he's selling me. No board.




I also noticed that it had a JDM style chip in it instead of a USDM chip, even though its a USDM ecu.





I really don't know what this means. Someone did some heavy editing to this ecu maybe not just the knock and AT function removed. What do you think? Does it look legit?

[Jarrett]

Personally, I wouldn't buy a modified board from anyone. They're not guaranteeing you anything. Is this thing too cheap to pass up? I doubt it. Look around for an unmolested one. You don't usually have the best luck with things like this.

[sonikaccord]

That board is the knock board. if you aren't using the sensor, there is no need for the board.

I don't see the at to Mt mod unless he did it under the board.

[4GAccordH22]

There was never a US spec OBD1 P13 AT ECU. All of the US 93-96 Preludes VTECs were MT cars.

[deevergote]

MT P13s aren't hard to find, and you'd be doing yourself a favor by running a knock sensor (especially since you're using this ECU with an engine that it's not programmed for...)

[Mishakol129]

MT P13s aren't hard to find, and you'd be doing yourself a favor by running a knock sensor (especially since you're using this ECU with an engine that it's not programmed for...)

Well yeah true, but some ppl said that the knock sensors a pos. Maybe cause they don't know how to wire, lol.

@jarret The offer was too good to pass up. 80 shipped for the ecu.

@4GAccordH22 But that's kidna strange, I was reading that the numbering's on the ecu mean its AT.

Anyways, its a done deal. I got the ecu. I still think that learning to tune my current engine would really liven it up. Its got so much torque and I can see the potential just sitting there. I just need a little guidance on how to do and what I need to tune. The PGFMI forum kinda confuses me and idk what I need to get at Moetes. I heard of a Neptune rtp that they make but I think I need a wideband.

I could run 345 injectors and have it tuned for performance and gas mileage. Then throw in some cams and stiffer springs. Bigger TB, my exhaust is wide enough as it is and my compression ratio is about 9:6:1.

[Mishakol129]

This is what my goal should be I think. Learn how to tune NA, get good at it, and then boost the hell out of it. I want a turbo so bad and it would be incredibly sick to make a turbo engine. Most interesting mod on a car you can do I think.

How many psi can a f23 bottom end take? I know that F22 blocks have weak ringlands, but what of the f23?

[Jarrett]

That is not too go of an offer to pass up. That's pretty much going rate.

[Mishakol129]

Yeah I figured that. CL had it for 100 and ebay has them for 125-150, sometimes 200.

I wonder what would happen if I put a p13 in my engien I got now with 345 h22 injectors, lol. Probably run good up until vtec.

What if I put a f20b vtec head on tho? I could mill the head down to bump the compression and have a H23 vtec already.

EDIT: I mean, I could, but I shouldn't mill the head to increase compression ratio I needed to put K20 pistons in to do that. I need to learn how to tune my current engine. Buy the stuff to do it. Neptune RTP?

I wanna set it up to get good mpg's on the highway and then performance at WOT.

[NTYPE]

sorry to have to break it to you bud but P13's arent supported by neptune or any of the tuning softwares.

You should have gotten a P28 or similar.

Problem with the P13 is you cant datalog. all you can really do is the old fashioned hex editing, its very trial and error and not a good way to get into & learn tuning.

Get a P28 ecu (or similar) learn about modding them and conversion (adding vtec, iab circutry etc etc) and get neptune and a moates demon, and a wideband.
It's gonna be expensive to start out but well worth it for the learning if you really are serious about tuning your own car.

Hey at least you have a cheap working P13 to get you up and running for now..

^^EDIT^^ Crome does have P13 support but its still very limited and does not offer datalogging.. and its crome :-S

[sonikaccord]

I usually buy civic ecu's at the yard, chip and sell for that much. Before you spend money on a tuning setup, take a bit of time and read up on engine management systems

[Jarrett]

Are you ever going to quit jumping the gun on purchases before getting all of the information you need?

[Mishakol129]

I was dropped on my head as a child, I can't help it.

[Mishakol129]

sorry to have to break it to you bud but P13's arent supported by neptune or any of the tuning softwares.

You should have gotten a P28 or similar.

Problem with the P13 is you cant datalog. all you can really do is the old fashioned hex editing, its very trial and error and not a good way to get into & learn tuning.

Get a P28 ecu (or similar) learn about modding them and conversion (adding vtec, iab circutry etc etc) and get neptune and a moates demon, and a wideband.
It's gonna be expensive to start out but well worth it for the learning if you really are serious about tuning your own car.

Hey at least you have a cheap working P13 to get you up and running for now..

^^EDIT^^ Crome does have P13 support but its still very limited and does not offer datalogging.. and its crome :-S

Yeah that was my plan I was gonna have to get a P28 or P72 or something like that. I know the P13's don't chip well.

I decided to just get the H23 Vtec engine. Ordered that sonnabish for 890 shipped. Going to run it with the P13, but if that fails to meet expectations, get a chipped and basemapped ecu. If that fails I might spend the money to get the hardware/software/wideband to tune my own engine. Just gonna be a bish to do me think.

[NTYPE]

P13 will work if you use obd1 H22 injectors and FPR to suit the ecu. Dont try running P13 with H23 injectors cause itll run lean