I'm looking to be able to tune a stock block h23 on up to 6 psi (approximately 220 whp) off a p28 ecu with crome. I've been working on stock programs without any problems at all. Car fires up, and idles perfect. Now I'd like to add in boost. My whole problem is not having any dyno tuners even remotely close to me. Locally I have no support at all so thus me having to do this myself. I'm willing to buy most of the stuff I need (wide-band, and real time programming equipment/ data-logging) but wouldn't mind having a hand learn how to tune an ecu of a boosted setup.

I would really love to have a decent boost base-map (In Crome) off a well running boosted h23 with at least 6 extra boost columns that I could reference off of and study. I've retarded my ignition by .75' per lb of boost using a turbocharger effeciency number of 120% so far, as I've read. I'm unsure if thats conservative enough but thought I'd start there.

I've read as much as I can get my eyes on but now I need real practical direct information that specifically applies to my particular situation. Any help or input would be very welcome. I apologize for being a bit ignorant on this subject so please don't flame my a$$ off.
Thanks in advance for anybody that can be of any help!

 

You're on the right track... just kinda have to get out there and start actually tuning it. Nobody can give you a basemap that will work 100% perfect. Pretty much what I do is start fresh with P30 code, get the ign/fuel tables for the engine you're working with (H23 in this case) copied over, and start driving it. If you have to add boost, seems like you already figured out boost tools, you'll probably want to add fuel tools as well. Then like I said, get out there and get the fuel straight, I usually do all the part throttle on the street before hitting the dyno to clean up all the fuel and then get the timing dialed in.


If you want real help you need to post more about what you have, 6psi means nothing...

 

Intercooled td05h b14. Still looking for injectors. I was looking to use the V-tec model injectors, would that work fine? Even with my stock injectors my injector duty cycle only gets to 120%. I've changed injectors out on the map to the V-tec injectors, and my map falls in under 100%. I know thats high, but thats up in 11PSI and theres no way I'll hit that. There is no future expansion on this setup. Once I've got it running off 6psi or around 220 whp, than thats my goal.

So the ignition tables arn't too much to worry about I guess?

I have a solid H23 program with literally zero flaws. So I'm building off that. I expanded it with 6 boost columns. Retarded timing by .75' per lb as I stated, and based it off a turbo efficiency of 120%(<this number I'm unsure of aswell, what does that actually mean?) I know turbos don't run that efficient (80% approximately for most) so is that number the inverse or something?

So what is the goal with the low cam fuel map anyway though? What should I be doing with fuel tools. I press the fuel tool botton, and it asks if I want to add in fuel tools, but when I say yes, nothing different happens. I've added in a fuel offset to get the basemap even running my car properly in the first place but is there anything else I can do? . Do you want it to be as smooth as possible? Does the smoothness effect how linear your power band is? I would like to understand what I'm doing. I know what I'm suppose to be doing, but I don't reallly know how what I'm doing affects the cars running status. Ie. I'm book educated in this matter but no practical experience.

 

Ok, first off it's VTEC not V-tec...

The H22A VTEC injectors will support mid 200whp, you will be ok with those, just make sure you use the resistor box with them. I'm also not sure if the clips you have work with them, I know the H22A clips are different but I haven't tried installing mine on my normal CRX harness yet. Fuel tools will allow you to set the correct battery offset for the injectors, as well as make crome keep the scaling factor for the injectors saved.

Duty cycle in Crome especially means nothing, don't worry about it. Obviously if it's 200% or something, you're probably too high, but for now don't worry about it because it's not accurate.

I'm not sure what the issues are if you haven't actually started tuning it. You don't know how much fuel it will need, so there's no way to tell yet how to build the map correctly. Really you just need to stop being scared and get out there and start making changes.

 

I have tuned it but not for boost. I've made a boost map, but I was nervous that I might miss something and cause some sort of detonation. I've decided I like my h23 ((oh and my bad on the V-tec...damn wheres the dash in variable timing engagement cam....I can't believe I did that lol)) and don't want to drop in another motor again any time soon.

Anyways I just wanted some pointers before I jump into something. Try not to be like my journeyman who expects me to start working on 600 Volt 200 amp panels live, and not ask any questions. lol (and he did, and I asked only one question, wheres my PPE?).

I've sunk almost 20 grand into my 4th gen with purchase price over the last 7 years, and I'm not about to screw up the last most important part.

I know with every car, with every different ecu, with every different program base, and even with every different programmer the results are always different. There are methods to doing it properly though and that's what I need to know. Like I stated I have no local support nor anything else helpful in this process, being I live in Canada which doesn't support the auto enthusiasts as well as they do in the United States.

Main thing I want to know is how smooth the cam graph is suppose to be. I figure the smoother the graph, the more linear the power band.
Also, I was curious theoretically if you went from 0 psi, to lets say 6(similar to boost spike), the ecu has no problems compensating by adding fuel immediately?
One more question a bit off topic but I hear its good for your head to run in vacuum. Is it because the moving parts/fluids etc all operate better in lower "gravity"? I was curious about how the vacuum benefited things in the head either way.

Thanks again for any input (sorry about my novel)