Nitrous Oxide - need help with dry n2o tune !!

hey guys,just got done instaling my nos 5177 kit and I need help with tunning for 42lb svo green top injectors and the dry shot.my goal is to run no jets but as for now I have the 100 shot jet in it.

I have HP-tunners but i'm lacking the skills at this point to tune.so if someone is willing to help me out I could send you my BIN file.

just for some other info,my car has many bolt-ons, G5X3 114 LSA,hooker long tubes,ported TB,ASP pulley,ect.my last wide band dyno showed 414 corrected rwhp and a/f was 12.9 @ WOT (tunning was done by wait4me performance)

I would like to get my juice up and running so I can get a few dyno's and some track time in before the end of summer...

ANY HELP WOULD BE GREATLY APPRECIATED..

-chris

come on guys help a poor boy out here :)

I can set ya up. It's really quite simple. takes more time in the directing than in doing. I will honestly try to get it posted tonight, but no absolute gurantee. Might be as late as Sat, cause i am racing tommorrow after work, so if ya can hang in there we will do it for sure. I have all the known numbers that work and basically you will just be replacing old numbers with new numbers and it will work great for ya. I am running the 42's also.
Robert

Thanks for the reply Robert.no big hurry, my injectors just arrived today so I need to install them.. :)



-chris

Chris, do you have the injector spreadsheet calculator? If not, download it, simple, you plug in your injectors rated flow @ rated pressure, then maintain new fuel pressure as 58psi (standard value for LS1) hit tab or enter and it will calculate the new offset vs KPa. highlight the Kpa line and copy, paste it into your HPTuners file under engine, fuel, general (at the center of the general fuel screen is flow vs. KPA).
Next, I go to Inj. Min Pulse Width and lower by 50%, and ditto on the Inj Default PW. Now your injectors are set. It would be easier on the phone, or IM....

I used the injector calculator but could figure out how to plug the #'s into the flow vs. KPA ...

my calculator gives me a flow rate of 48.5

ok here are the values I get from the spread sheet.my problem is when I try to copy and paste it only enters the first number in hp-tunners :bang:

48.4983 48.8005 49.1009 49.3995 49.6963 49.9913 50.2846 50.5762 50.8661 51.1543 51.4410 51.7260 52.0095 52.2915 52.5720 52.8509 53.1284

ok guys got the injectors tuned. they where actually pretty easy.I just needed to reasure my self that I could do it :)


what do I need to do for the N20 ? pull timming ?? richen up WOT ?? this is where i'm gonna get lost and afraid to make a mistake.. :emb:

ok guys got the injectors tuned. they where actually pretty easy.I just needed to reasure my self that I could do it :)


what do I need to do for the N20 ? pull timming ?? richen up WOT ?? this is where i'm gonna get lost and afraid to make a mistake.. :emb:
Boy that was fast. the write up in my web site is the how to, to pull timing on the spray for dry hits, only when spraying. If you even need to pull any. Richening up, depends on a/f at wot on the spray, a couple ways to do it for dry hits. You are running dry right, iirc from out talks?
Robert

yes it is a dry shot 100 for now and no jets later (nos 5177 kit )

Robert,I was on your site reading about how to pull timing but this is where I get lost.

how do I see what my timing is set at ?


thanks for the replys !!!!

to the top

bringing this to the to top guys,I need someone to help me tune my dry shot..

Hows it going Chris? Putting my 42's in next week. I am right behind ya, but I am using EFI Live.

bring it to a professional tuner and call it done

yes it is a dry shot 100 for now and no jets later (nos 5177 kit )

Robert,I was on your site reading about how to pull timing but this is where I get lost.

how do I see what my timing is set at ?


thanks for the replys !!!!
You'll need a tuner program that can see parameters and log said parameters.
Robert

Robert he has HPT

I have HP-tunners but i'm lacking the skills at this point to tune.so if someone is willing to help me out I could send you my BIN file.

-chris

I have hp-tunners,but i'm in the very early stages of know how.I'm pretty sure that my timming has been advanced when I was tunned for the cam,so I need to pull some timming.then I want to get on a wide-band dyno to verify A/F.

[QUOTE=cws T/A]bring it to a professional tuner and call it done[/QUOTE

well I would like to learn how myself and save some $$$ .plus there are Pro's in here that can walk me through it :)

Hows it going Chris? Putting my 42's in next week. I am right behind ya, but I am using EFI Live.

hi beer,I got my 42's in and tunned :) I need to pull some timing for the spray to be safe.

Chris, in your logging program in histograms pid #1 should be Main Spark-Timing advance, you can easly see what your timing is at part throttle to wot. Pid #2 shows knock retard, meaning if any timing was needed to be pulled (good way to see if ya need to pull any timing). You can also see your timing value in the chart Display if it is a parameter you use to log.
Here's how to eliminate kr. If you see any kr in your histogram follow this. Say you have 4* in cell (4.0, .20). This should be 0, so subtract 4 from VCM editor>edit>Engine>Spark advance>main spark vs Airflow vs RPM open throttle/moving>high octane (4000, .20) cell. Just subtract by clicking the plus selection (after selecting/highlighting box) after typing in -4. Do this for all corresponding areas with KR. Log again and varify that kr is gone. Hope this makes sense, but am sure once you get to the areas you'll figure it out.

There you can also log duty cycle if you have chose it (injectors big enough). The help files are really good on getting your logging parameters set-up for what you like.

For a/f, also in histogram and chart display, you'll see it in narrow band (stock), but narrow band will not be as accurate as a wb the farther you get from 14.7:1 ratio. But will work in a pinch, to get a basic idea where your at.
here's the numbers to base opinion on .880-.890 is ideal for n/a, lower numbers are leaner ie: .800, and higher are richer ie: .900. Now I don't know what a corresponding number represents (in my notes somewhere) in actual a/f, but someone reading along may have the break down. I allways have used a wb, so...
Hope this helps to get started, as HPt can be quite a learning process. If I didn't make sense somewhere let me know.
Robert