1st Scan on Nos
1st Scan on Nos Just hooked up everything figured out my Interface settings and made my maiden Nitrous pass. Everything was fine power was great for a 75 shot and even though I jetted VERY rich .041 Nitrous and .033 Fuel it was still reading lean on my wideband. 12-4 to 12-5
Is this normal I was targeting the 11's for AFR. Normaly aspirated my " PCM For Less" tune is seeing 13.2 AFR. What do you all think of the scan posted
Is this normal I was targeting the 11's for AFR. Normaly aspirated my " PCM For Less" tune is seeing 13.2 AFR. What do you all think of the scan posted
You have this all wrong. Plugs>wideband
Just an example.
Last outing I had at the track. Hooked the wide bands outputs up to the EIO inputs on HPT. Did a pass, looked at the logs, and it showed the right reading at idle, right reading on the two-step, but as soon as I entered power enrich and the computer commanded a richer afr, the wide band would read nearly 2 to 2.5 points leaner than the computer was commanding. It was like it was reading the opposite of what the ecu was commanding.
Well pulled the plugs, and they showed rich which didn't go along with what it said. Ran it again same thing. Then I realized my afr gauge wasn't showing any reading.
Unhooked the wide bands outputs from HPT eio inputs and whaddya know it starts reading out fine again like it should. Didn't make another pass after that as I was leaving and unhooking the scanner when I realized it wasn't reading this whole time. When I log I don't have to look at the gauge during a run so I never looked at it to see it wasn't reading out until then.
Just an example.
Last outing I had at the track. Hooked the wide bands outputs up to the EIO inputs on HPT. Did a pass, looked at the logs, and it showed the right reading at idle, right reading on the two-step, but as soon as I entered power enrich and the computer commanded a richer afr, the wide band would read nearly 2 to 2.5 points leaner than the computer was commanding. It was like it was reading the opposite of what the ecu was commanding.
Well pulled the plugs, and they showed rich which didn't go along with what it said. Ran it again same thing. Then I realized my afr gauge wasn't showing any reading.
Unhooked the wide bands outputs from HPT eio inputs and whaddya know it starts reading out fine again like it should. Didn't make another pass after that as I was leaving and unhooking the scanner when I realized it wasn't reading this whole time. When I log I don't have to look at the gauge during a run so I never looked at it to see it wasn't reading out until then.
Last edited by Fbodyjunkie06; Jun 10, 2012 at 08:01 PM.
Trending Topics
my AFR gage shows dead rich 10.0-10.5, and my plugs are almost perfect... you tell me which one I should trust...
You don't know what the motor wants based of a numerical reading on some "gage", its a great tuning tool if you know what number you are shooting for. The only way to find the number is match a great plug that gave the optimal performance to that number on your "gage". and that just fuel, timing works the same way.
goodluck and keep learning. it will only benefit you in the future. If its truthfully that lean on that jetting something is funky
You don't know what the motor wants based of a numerical reading on some "gage", its a great tuning tool if you know what number you are shooting for. The only way to find the number is match a great plug that gave the optimal performance to that number on your "gage". and that just fuel, timing works the same way.
goodluck and keep learning. it will only benefit you in the future. If its truthfully that lean on that jetting something is funky
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thanks for the replies and I will definitely begin by reading the plugs before I up the jets. Going to the track this weekend to scan and read the plugs.
But I want to lower my AFR Normally aspirated from 13.2 TO 12.5 - 12.8 first
A few questions before I do this
1. If I am not knocking I am assuming it shouldnt be an issue to test even if seeing leaner in the mid 12's for AFR ?
2. Should I run a quatermile then read the plugs or WOT a gear or two
3) Can I wat to get to my parking space at the track to read the plugs or I need to shut down and read the plugs after I hit the return lane.
But I want to lower my AFR Normally aspirated from 13.2 TO 12.5 - 12.8 first
A few questions before I do this
1. If I am not knocking I am assuming it shouldnt be an issue to test even if seeing leaner in the mid 12's for AFR ?
2. Should I run a quatermile then read the plugs or WOT a gear or two
3) Can I wat to get to my parking space at the track to read the plugs or I need to shut down and read the plugs after I hit the return lane.
Last edited by 1BaddLS2; Jun 12, 2012 at 08:42 AM.
Thanks for the replies and I will definitely begin by reading the plugs before I up the jets. Going to the track this weekend to scan and read the plugs.
But I want to lower my AFR Normally aspirated from 13.2 TO 12.5 - 12.8 first
A few questions before I do this
1. If I am not knocking I am assuming it shouldnt be an issue to test even if seeing leaner in the mid 12's for AFR ?
2. Should I run a quatermile then read the plugs or WOT a gear or two
3) Can I wat to get to my parking space at the track to read the plugs or I need to shut down and read the plugs after I hit the return lane.
But I want to lower my AFR Normally aspirated from 13.2 TO 12.5 - 12.8 first
A few questions before I do this
1. If I am not knocking I am assuming it shouldnt be an issue to test even if seeing leaner in the mid 12's for AFR ?
2. Should I run a quatermile then read the plugs or WOT a gear or two
3) Can I wat to get to my parking space at the track to read the plugs or I need to shut down and read the plugs after I hit the return lane.
Do an 1/8th mile pull to start with and shut it off after the 1/8th, just don't put it into N when you cross the stripe wait until you're slowed down under 40-50mph to put it in N so you don't overspeed the drum and send it through your floorboard after it abruptly exits your transmission case causing some nasty damage to your car and possibly you.
I would put a set of gloves in the car with you along with your socket wrench and pull the plugs on the return road or if you can get a small truck or atv to pull it even better. We used my reg. cab s-10 to pull Thadd's car back to the pits last weekend..
Just to add on what fbody posted, if you don't have a small atv or something to pull you back, just keep a couple of the old plugs and when you get to the return road just pull like 3 plugs and put 3 old ones in and drive back to the pits. This way you can read the plugs you made the pass on in the pits.
TECH Fanatic
Joined: Sep 2003
Posts: 1,058
Likes: 1
Just hooked up everything figured out my Interface settings and made my maiden Nitrous pass. Everything was fine power was great for a 75 shot and even though I jetted VERY rich .041 Nitrous and .033 Fuel it was still reading lean on my wideband. 12-4 to 12-5
Is this normal I was targeting the 11's for AFR. Normaly aspirated my " PCM For Less" tune is seeing 13.2 AFR. What do you all think of the scan posted
Is this normal I was targeting the 11's for AFR. Normaly aspirated my " PCM For Less" tune is seeing 13.2 AFR. What do you all think of the scan posted
