Title is pretty self explanatory. I have a crappy header, from my h-t reading it probably is restricting my hp compared to an exhaust manifold, so I am looking to upgrade to the tri-y header here soon and was wondering how that would impact my a/f ratio? I am currently running a p72 with a base H22 map from Crome ( I know I know, I NEED to get it tuned) problem is that here in Arizona we don't have anybody set up for Crome, I bought this ecu and all in the middle of the night without doing adequate research. I have been really happy with the performance gains I got from the ECU coming off a P13... I am going to be switching to Neptune but their will be a lag time in between from installing the header to switching to Neptune and currently my car dumps fuel when I hit Vtec (I think the ECU goes wide open throttle in vtec so I don't lean out) ppl bitch about it and I don't like paying for the gas so I am wondering if when I install the tri-y will it lean out my car? Which is what I am hoping for, or will it make it run richer. my guess is it will lean it out because the air will flow out of the head faster therefore more can come in??? Thanks for the help in advance.

 

I installed that header on my car. All I had was intake & exhaust. Here's the before & after A/F ratio.

 

Increase the VE of your motor and a speed-density system will run leaner.

 

^ what he said. The P13 usually runs pretty rich up top so as long as you don't go much over 13.5:1 A/F then you shouldn't have to worry much about running without Neptune.

 

so it looks like "post header" it brought you more towards 13.0... I don't know what VE means. I dont even use the P13 anymore, just to pass emissions lol. I was going to install neptune in the P13, will I loose control of the secondary intake manifold control? BTW car is a 92 with a JDM H22, 3" SRI w/ velocity stack, full exhaust.

 

VE is volumetric efficiency. Wiki it, I can't type everything that it has to say. I could try to sum it up too but I'm not a physic's expert. Maybe matt will chime in with his lame man's interpretation of VE. LOL

P13s support IABs. I'm under the impression you'd need a p72 to tune your car though don't you if you want to retain IABS?. I've also been told by my tuner though that you can use po5s/ po6s too and make them able to run IABS. Not sure how at all though if its true or not. I tend to try to see formyself rather than taking other peoples words of advice for fact.

 

You can rewire about any chipable OBD1 civic ECU to run IABs. Then you use a modified P72 .bin file to open the secondaries.

BTW it's "layman's terms" not "lame man's terms."

 

LOL, I know. I thought I made that an obvious joke. Doesn't everybody pick on the physic's guru?

I'm under the impression you just add a few wires actually to convert auto to manual. r135 to d13 is one of the jumpers. Thats all I can remember off my po6.

Where can you find which ecu's can be converted to manual and how? is it all in pgmfi?

 

yeah but I am trying to get away from Crome due to the fact that I cannot get it tunned here. I was going to either have neptune put on my P13, but an ECU with neptune already on it, or have Crome pulled out of my P72 and neptune put on their. I think the best route would be adding it to my P13 and selling the P72 with Crome to somebody who can use it... my major concern is if I change the header and my A/F ratio gets richer than I might as well connect a tube from the bottom of my gas tank to my exhaust (I am being facetious of course) I am just wondering if I can have a 3 month delay between the Tri-Y and Neptune.

 

I got leaner with the header, so you should be fine.

 

Teambk8. I'm not sure if you understand chips/tuning. I think you might wanna read up a bit because I don't think your clear on everything. Your p72 has a chip on it thats programmed in Crome by the sounds of it. You can use multiple softwares to program a chip than can run on the tunable ecus ie. P72. Crome, ectune, neptune are all just software plateforms you use to pretty much generate and than store data on chips that get read by the ecu. Burning the data is accomplished by using a chip burner. Some softwares use a datalogging hub where you can make real time adjustments to the program in your chip using a laptop while driving or on the dyno.

What this all means is to program your p72 you remove the chip thats in your socket and you have some one generate a program in what ever platform you choose from which you can find someone to tune for you. If your tuner can use neptune, than all you do is bring your car to him and have them burn a new chip for you.

Some people say you can't even tune a p13 or p14. This is one thing you'll have to find out for sure.

 

Neptune is plug, dremel, and play into a ECU chipped in a way that allows Crome w/datalogging to work.

 

mattsnooz: thanks for the info, you were right I didn't know that and I have read through the section on ECU's and tuning before it is a lot of information and I must have glazed over that section. My understand of what you are saying is I can just take my car, as is, over to a tuning shop and they will burn the neptune "image" onto my ecu. That does clarify everything for me! Thanks for your help, also it is good news that the header leaned out everybody's cars (from the feedback)... thanks guys