Yes, I FINALLY got to the dyno!

[Nathan]

number look very good. With a little more tuning that you are gonna do you shoul dbe able to open pandora's box with this thing. Get it to the track and lets see some times from it.

I'm trying to get some folks together to go weekend after next

[klattr1]

to load in the pic, you could pull up the PDF file and then hit the Print Screen function button on your keyboard. After you hit the button, open up a photo editing program or MS Paint and paste it in and save as a JPEG.

[Nathan]

to load in the pic, you could pull up the PDF file and then hit the Print Screen function button on your keyboard. After you hit the button, open up a photo editing program or MS Paint and paste it in and save as a JPEG.

Dammit...your right. Now I REALLY feel stupid!

[Nathan]

Ok guys, I updated the first post in the thread to show three of the dyno charts. As you can see, its rich as all heck. Also, all of those charts are with the highest level of smoothing applied, they are MUCH more jagged without smoothing. In fact, they get more jagged as rpm's increase. I think the stock ignition is just having a hard time keeping up with things, even with a .03 plug gap. I'm going to look to pick up a stronger ignition system and an S-AFC to lean things out a bit within the next few weeks. One thing that concerns me is the afr's on the second dyno chart...as you can see, it ran rather lean up until almost 4k. It made good power during that time but it sure doesn't seem safe to me, I dont know what caused it to do it that time or the one other pull it did that on (I didn't post the other chart, it looked the same) but something did. Maybe Aaron at ATS didn't immediately give it full throttle or something? I dont really know but it worries me a bit. I might plug in a little more fuel down low in the rpms and pull out a bit up high. What do you guys think of these charts and the weird afr's on that second one? I really think with an ignition system, leaning it out, and running a straight pipe I can easily get above 350whp without raising the boost anymore. I'd really like to come in closer to 375 on pump gas and 17psi.

[sultan]

i wanted to go to the dyno but i had to work

in the thread on di about duron's 438hp dyno james said the jwt 3 bar 72lb program has problems with running lean under closed loop, you might be having that same problem. are you going to go back to ats for tuning when you have better ignition and safc?

[Nathan]

i wanted to go to the dyno but i had to work

in the thread on di about duron's 438hp dyno james said the jwt 3 bar 72lb program has problems with running lean under closed loop, you might be having that same problem. are you going to go back to ats for tuning when you have better ignition and safc?

Yep, I probably will...I'm going to have to look into this lean under closed look condition more too. In fact, I'm thinking a call to JWT might be in order.

[GirlRacerS14]

Wow, that leaves alot open in my mind kiddo...

You be nice.....

And looks good Nate. I wanna see the 1/4 mile times too after you get those problems worked out and have a chance to get to the drag strip. Besides you gotta have all this worked out by August anyways since you'll be at the convention.

GR

[Structure240sx]

nathan- when is the o2sensor under closed loop? if its during decleration thats normal. maybe closed is while cruising? then thats a little weird. let me know

[Nathan]

Yeah, it should just be when its in a cruise mode, then the ECU tries to run things as lean as possible. I'm actually thinking they just didn't immediately floor it on those runs and it could have run lean for just an instant if it was starting from a part throttle cruise like condition. I'll just make sure to floor it whenever I need Also, I'll probably plug in a little more fuel down low once I secure an s-afc to screw with things. I'm trying to figure out what ignition system to go with now...perhaps I should start a new thread about ignitions...

[Structure240sx]

ahh yea my car says right around stoich at part throttle but accelerating until i get the turbo spooling. also when it starts spooling my safc swtiches to the high throttle map i have at 40% throttle. i got a new summit catalog in the mail today and the msd sci ignitions seemed good for the price

[Nathan]

ahh yea my car says right around stoich at part throttle but accelerating until i get the turbo spooling. also when it starts spooling my safc swtiches to the high throttle map i have at 40% throttle. i got a new summit catalog in the mail today and the msd sci ignitions seemed good for the price

So how does the s-afc know that the turbo is spooling, to switch to the high throttle map? I might be hitting you up for some info when I get my s-afc Technology confuses me greatly...and yeah, I'm leaning towards an MSD digital 6 ignition with an SS or HVC coil, I'm just trying to figure out if the HVC coil is worth another 70 bucks or so. I want this to be the only ignition upgrade I ever do though, so I'll probably just go all out. Oh, and the digital 6 and sci are identical, so I'm glad you agree it seems good I mostly want it for the 2 step limiter and rotary dial rev limits. I thought about the 7-AL2 also, since I found it for 329...decisions decisions!

[Structure240sx]

yea i wish i at least bought a msd 6btm instead of jsut the btm. do any of those ingnitions have a boost retarding function?

the afc doesnt know that the turbo is spooling. i monitor throttle precentage on the afc and listen for the turbo to start whistleing or to see boost. i remember that precentage which for me is about 35-40%. the afc has a high and low throttle map. it will switch to the high throttle map whne you reach a certain throttle percentage that you input. since im tunning 480's on a stock ecu i have the low map at 0% so my idle and cruise will be stable until is reaches my high throttle at 37% so when the turbo starts spooling extra fuel will be put in. its actually very easy to use once you actually use it. it will also be easier for you since your ecu is already tunned. me on the other hand had to tune the z32 maf and 480's. once you get jsut hit me up

[Nathan]

Thanks for the tips brotha I'll probably order the s-afc and the ignition on the 30th (payday ) I'll see the dyno again soon after that.

[Structure240sx]

sweet im gettin to the dyno finally next saturday, hoping to catch up to your 320rwhp

[Nathan]

Well, I solved the ignition problem today, picked up a 7al-2 for 203 bucks off ebay, and a 3 step rev limiter for 42 bucks, same seller I just have to send the box into MSD and for 35 bucks they'll modify it to work with my 4 cylinder since I bought the 8 cylinder model Check it out:http://cgi.ebay.com/ebaymotors...26570h ... rs...27931