FORCED INDUCTION Turbos | Superchargers | Intercoolers | H2O/Meth Injection

5# Radix, what's a good AFR for WOT?

Thread Tools
 
Search this Thread
 
Old 03-08-2008, 08:57 PM
  #11  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 216 Likes on 172 Posts
Default

Originally Posted by brobradh77
Honestly at WOT if your AFR gets into the 12's you need to let off.
Agreed, when I see mine at 11.9 I start getting concerned in case it drifts leaner.
Old 03-09-2008, 10:38 AM
  #12  
TECH Apprentice
iTrader: (2)
 
Doobie's Avatar
 
Join Date: Dec 2004
Location: Roch. NY.
Posts: 390
Likes: 0
Received 0 Likes on 0 Posts
Default

I agree with trever1t that 11.2~11.8 is safe. I called Magnuson several months back and spoke with their tuner and asked for WOT recommendations, he told me that they felt up to 12.1 was safe but no higher. Where is you WB o2 sensor mtd.? I would be concerned with your WB calibration because It seems that with a 13.9 WOT afr your motor should have by now.

Last edited by Doobie; 03-09-2008 at 10:50 AM.
Old 03-09-2008, 04:46 PM
  #13  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 216 Likes on 172 Posts
Default

You AFR's are lean for a NA application let alone a boosted application, I cant believe it didnt blow yet either. Unless you wideband is reading incorrectly.
Old 03-09-2008, 11:47 PM
  #14  
TECH Addict
iTrader: (10)
 
Stoichiometric's Avatar
 
Join Date: Nov 2005
Location: Way out there
Posts: 2,199
Likes: 0
Received 0 Likes on 0 Posts
Default

Post your tune?
Old 03-14-2008, 01:33 AM
  #15  
TECH Addict
Thread Starter
iTrader: (5)
 
CashDudeHomie's Avatar
 
Join Date: Apr 2002
Posts: 2,911
Likes: 0
Received 1 Like on 1 Post
Default

Hey guys, the PLX brand wideband reads about 14.68 at idle, so I think it's accurate. It's mounted on bank 1 just before the transmission cross member. I did some VE and PE tuning the night after I posted this and got the AFR into the high 11s. It needed a bit more tweaking but my laptop ran out of juice. Apparently the tuning made a big difference, because on the way home I did a 20 punch and broke my ring and pinion.

Please tell me if I am interpreting this correctly: Since I have the stock map sensor, the bottom row of the VE table is going to be hit at any amount of boost, whether 1# or 5#. So the bottom row is going to have much higher numbers than the row above it, correct?

Also, thanks for the tips. Next I'll work on the timing. I'm only running 15* at the moment. What do you guys recommend?

And I guess this shows the 6.0 is pretty stout if it stood up to my botched tune for 6 months.
Old 03-14-2008, 01:46 AM
  #16  
9 Second Truck Club
iTrader: (16)
 
stock48's Avatar
 
Join Date: Sep 2006
Location: Colorado Springs, Co/ Central, Ca
Posts: 3,655
Received 5 Likes on 5 Posts
Default

Mine hits 12-12.2:1. Im out of fuel pump so I can't do anything about it. If it gets past 12.2 I let off.
Old 03-14-2008, 10:20 AM
  #17  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 216 Likes on 172 Posts
Default

Originally Posted by CashDudeHomie

Please tell me if I am interpreting this correctly: Since I have the stock map sensor, the bottom row of the VE table is going to be hit at any amount of boost, whether 1# or 5#. So the bottom row is going to have much higher numbers than the row above it, correct?

Also, thanks for the tips. Next I'll work on the timing. I'm only running 15* at the moment. What do you guys recommend?
.

Well yes an no, your MAF determines the majority of your fueling past 4k rpm. You need to tune your MAF table for WO throttle. You should set up a Error histogram for your MAF table so it tells you how far you need to scale it to get the correct fueling. Do you have HPT or EFI live?
Old 03-14-2008, 10:21 AM
  #18  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 216 Likes on 172 Posts
Default

I cant believe it stayed in one piece however with that being said I think your only saving grace was low boost and lower timing. As for timing it depends on what your IAT's are and how good the fuel is around you.
Old 03-15-2008, 03:17 AM
  #19  
TECH Addict
Thread Starter
iTrader: (5)
 
CashDudeHomie's Avatar
 
Join Date: Apr 2002
Posts: 2,911
Likes: 0
Received 1 Like on 1 Post
Default

Alright, I was thinking the MAF was disregarded during power enrichment. I logged the MAF that day, but the errors were only 1-3 % or so, so I just left it alone. When I fixed the VE table, my AFR went to the proper range. When I get the new gears put in, I'll check it again to be safe. So 15* is low timing? What do you think I could raise it to? I have HPTuners. I also have a cammed 6.0 with a 2.9 pulley, so I'm not going to get much more boost out of it than the 5 or 6# I'm making now. I could go to a 2.8 down the road, but it's plenty fast for me right now, just want to get the most out of it now.
Old 03-15-2008, 04:42 AM
  #20  
Admin
iTrader: (22)
 
03sierraslt's Avatar
 
Join Date: Jul 2004
Location: Western PA
Posts: 19,004
Received 216 Likes on 172 Posts
Default

What cam are you running? What fuel do you run, what is the highest they have out there? As for timing you'll just have to add 1 degree at a time and watch for KR. I would guess you should get at least 18-20 at 5lb but maybe not. It depends on fuel and iat's as well.


Quick Reply: 5# Radix, what's a good AFR for WOT?



All times are GMT -5. The time now is 10:15 PM.