I am confussed with the results.

I blew 4 of my coil packs right after the dyno.

Why?

Here is the dyno chart.


Recap:
2000 maxima
V-2 SC 2.875" pulley
CAI
510 injectors.
Front mount aftercooler
water injection (turned off)
2.5" Catman exhaust
J&S
E-manage

 

Your Dyno chart look weird... I see your tq getting to 220ft-lbs fairly quick but then it take forever to climb and it end up to 500ft-lbs, euhm... also I see your run lean until 76mph, then it stay between 11.7 & 13.5 maybe I need to drink another beer. Sound like you need to play with the E-manage fuel map. How do you translate the dyno graph ? I mean what's your impression ?

 

im drinking, continue

 

whats up gabe, how have you been.

I am not sure but i think maybe the dips and all the curves were maybe caused by the transmission shifting? Did you dyno it in third gear? The coilpack issue is probably related to the J&S.

 

Don't know about the coil packs but your air/fuel ratio is dangerously lean.

 

If you take out the dips and bumps, your torque curve is amazingly flat... 200-250. The small dips seem to be the J&S pulling timing. I have no idea why the huge bumps are there. What's more weird is that they're not showing up in your hp graph.

Looks sort of like you hit the nitrous button a split second on 2 different occasions.

Are you tuning the car yourself?

 

Yes Iam tuning myself with some help from Thomas.
I am puzzled on all the results. My wide band doesn't show me running that lean. The prob was in my tail pipe so I don't know if it is less accrate there then my wideband in the y-pipe.

Can the J&S cause the coil packs to blow?

 

3rd gear run only

 

I think if the correct diodes are not used it can. Kinda like what happens with the emanage timming harness if not wired correctly.

Deff go by what your wideband is saying. That AEM you have is much more accurate than a tail pipe sniffer


Gabe, how much timming are you pulling? From what i remember from our previous converstaions you may have to much timming pulled. I know you don't want to blow another motor but i think you are being to conservative since you are running a intercooler.

 

Something is not right. You shouldn't be running that lean because the variance between pre-cat exhaust gas (i.e. where you installed the AEM UEGO I assume) and post-cat exhaust gas should yield similar A/F results.

Here is some info on what the variance might be. The LM-1 is a wideband like the AEM UEGO, and like the AEM is very accurate (except it can read below 11.0 unlike the AEM).
http://www.innovatemotorsports.com/f...php/t-668.html
"In other cases, we've seen as much as 0.5-1.0 AFR leaner."

However, your A/F reading is MUCH greater than that from 110 mph and up... up to 1.5-2.0 points leaner if you're trying to get 11.2 A/F. If you compare 98 mph to 118 mph, you're 1 full A/F point leaner.

Definitely double check the A/F reading you are getting on your AEM with something else. From the looks of it, your J&S is pulling timing at the dips because of knock (or engine noise). The cause of knock is too little fuel.

 

I shortened the wire from the metere to the probe when I installed it. Could that cause a different reading?

 

He could have an exhaust leak downstream of the his WBO2 which could also explain the large discrepancy between his WBO2 and the sniffer.

I'd be busting out the emanage for some datalogging or at least realtime data monitoring if I were you, just to see what's going on at the places you are seeing torque dips and to make sure your fuel and timing maps are as you want them.

 

Just spoke to John at J&S and he said that I have one of the first units (the one's Mardi setup GB) and that the firmware in it causes the coil packs to fry. So he said to send it him and he would make mme a new one for free. Really nice guy.

So, to start the J&S was causing some problems.

 

is that like 500ft lbs of torque and 300HP? graph is kind of hard to read. Maybe I need to put on my glasses or something.

 

That's what it says but it's obviously not right.

 

Yes that what it shows, but that's why I posted it looks all wrong and I just wanted some opinions.
Hopefully with the New J&S and alittle or alot of ajusting I can try to get another dyno run.

Oh I think tourque was alittle more like 285...give or take without the spikes.

 

[QUOTE=Y2KevSE]Something is not right. You shouldn't be running that lean because the variance between pre-cat exhaust gas (i.e. where you installed the AEM UEGO I assume) and post-cat exhaust gas should yield similar A/F results.

Here is some info on what the variance might be. The LM-1 is a wideband like the AEM UEGO, and like the AEM is very accurate (except it can read below 11.0 unlike the AEM).
http://www.innovatemotorsports.com/f...php/t-668.html
"In other cases, we've seen as much as 0.5-1.0 AFR leaner."

QUOTE]


a couple buddies of mine have the innovate wideband, and they just got tuned in arlington last week. one of their wideband gauge is reading an entire point less that what the dyno tailpipe wideband read.....he called innovate, and they told him that it was fine, but his methanol injection makes it read a little different......


your cat will affect your a/f reading from the tailpipe wideband, though....they should have taken the reading from yours that is before the cat....it is more accurate.