im just curious as to what ppls afr is if u just rev it up hard in neutral my car was 11.8 on ottps stage 2 tune and my mods are in my sig im hoping its running fatter then that under load so when i get my tune i will have more things to change any info will help

 

and bump

 

dont make me bump this **** all night

 

im almost positive u won't be able to tell ur AFR till u hit the gas in say 3rd. I know when i was helping a buddy tune his srt-4 he would let off the gas and u could tell it wasn't right. U should be 11-12afr at WOT im almost certain

 

so u think ill be runnin richer if i run a wot in third i cant right now cuz my car is in storage or i wouldnt even of asked this stupid question lol

 

Ok a good tune. Idle and cruising is 14.3-15.3ish to keep a stoch afr of 14.69999 [14.7]. Wot everytune is diff but best wot afr for a lsj is 11.3-11.8 i think.

 

ya i know that i am wondering about afr's when u rev it up in nuetral like wot in nuetral what do u hit

 

cmon guys

 

1. why you reving it up in neutral

2. it shouldnt matter that the afr is in neutral, if its around 14.6 during idle/light throttle and at your target afr during wot, then its good to go.

3. in theroy, if you rev in neutral and u rev with the peddal fully to the floor, then your afr should be the same as your target afr at wot.

 

Seriously, you're going to bump a thread 5 times in an hour?

Why don't you check your afr under load instead of just asking us what it will be?...

 

if u would read u would realize my car is in storage just saying im just wondering and i dont think reving it up would give the same load on the motor as wot

and yes im gonnna bump it 5 times cuz i was kinda in a hurry

 

If you can't drive it.. why are you in a hurry again?..lol

Its hard to compare neutral to loaded because the engine revs so much more freely and quickly in neutral.

however, 4th is usually richer than 3rd... 3rd richer than 2nd.. due to load.. soo.. maybe

 

i never thought about it, cuz i never wonderd what my afr is in neutral, but, being in gear and underload, vs being in neutral has no effect on the afr. Think about it, you hit the gas, it allows air, fuel and spark to combust, greating power in the engine. Just because your engine is connected to the transmission, whether its in gear or not, will not have any effect on how your engine makes power. Once again, i could be wrong, but in my mind it makes sence. That being said, i highly recommend u dont rev the **** out of your car. If you are that despret to find out the afr, take the car out of store, do a 3rd gear pull and find out.

 

i see where ur coming from but im pretty sure that it does make a difference and i didnt rev the **** out of it im not a ricer boy i reved it once and recorded the afr at 11.8 idk i guess ill just wait till i get it out if nobody knows

 

reving it once, even hitting the rev limiter wont give you the actual target afr, it takes a second or two of WOT for it to reach the target afr. For example, when i go WOT in my truck, from whatever rpm im at till about 4000rpm it drops, then from 4000 to my shifting point its the actual afr.

lol, now that i just thought that out, i really dont think my previous post was correct. I'll tell you in about 30mins when i go pick my gf up from work, ill rev my truck then ill try to go WOT (havent been able to do it since its winter and my tires just spin like crazy)

 

11.8 = exactly what you want on a canned tune

 

ya thats what u want at wot under load but is free reving (no load) the same as under load im leaning twards no and i want my car to be running fat so that it runs even better after i tune it what did u find out with ur truck srt?

 

you'll never know without driving.. you need to hit a target MAP, plus you probably have a rpm minimum for PE so it takes a couple seconds after the rpm to actually hit the actually PE because of your enrichment rate (ottp=pretty low), in neutral your PE will not be your actually driving AFR at WOT. So in short, your probably gonna be pegging 10.0 on your wideband because CAN tunes are generally really rich.

 

this is what i wanna hear lol, this is what i thought to start with but when my buddy tried this in his mustang he hit 10.3 and at wot on the street he only hits 9.9 so i was a little worried ha.

 

crusing afrs should be in the mid 14s to low 15s same with idle....

 

u didnt read did u

 

Didn't really feel it necessary to read about you reving at idle.... there is no load so its not entering PE... so there for it's just whatever....

 

lol ya i know its a dumb question but im new to tuning and im reading as much as i can cuz i wanna be able to tune myself but my brain can only absorb so much lol what exactly is PE all the abreviations are screwing me over

 

m-dub to be technically serious your car can go into a power enrichment siting and reving. All that needs to happen is the car needs to be within the factors. Like when i tune i usally have pe come in at 135 kpa (35) which in return is close to 5 lbs. But it also cant come in unless its over a certain rpm usually around 3k no less then 2500. So it can come into pe. But there is no point to rev it up to see your afrs. Your car will do wuts its commanaded. Try to stay closest to stioch 14.69999 ect.

 

p.e stands for power enrichment, there is a lot of tables to mess with when fulling with it. Something you also need to notice is theres alot to tuning the lsj. You have ve tuning, you have maf tuning, then timing of course , then you have the p.e, and ect. If you are a newbie id recommend not changing anything unless you have a wide band, learn the basics first, you have a few thousand saved up just in case, and you have enough time for datalogging.