Is this running toO lean? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 10-26-2014, 12:32 PM   #1
Newb
Thread Starter
 
Join Date: Sep 2014
Location: Ft Riley, Kansas
Posts: 14
Total Cats: 0
Default Is this running toO lean?

I really have no idea how to read the air/fuel graphic. Could you guys give me a hand? The mechanic says is a "little" lean at 5-6k but it will be fine as it is. Is it safe to run it the way it is of do I need to go back and adjust?


Attached Thumbnails
Is this running toO lean?-20141025_174658_zpsc42f46fe.jpg  
Oso787 is offline   Reply With Quote
Old 10-26-2014, 12:47 PM   #2
Junior Member
iTrader: (4)
 
Join Date: Jun 2013
Location: Dallas TX
Posts: 149
Total Cats: -3
Default

too rich between 3-4.5 and too lean after that, assuming under boost. I know very little about tuning
Baker99miata is offline   Reply With Quote
Old 10-26-2014, 02:20 PM   #3
Elite Member
iTrader: (1)
 
Join Date: May 2009
Location: Jacksonville, FL
Posts: 4,685
Total Cats: 216
Default

Your tuner sucks dick.
Full_Tilt_Boogie is offline   Reply With Quote
Old 10-26-2014, 03:50 PM   #4
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,812
Total Cats: 185
Default

Quote:
Originally Posted by Oso787 View Post
I really have no idea how to read the air/fuel graphic. Could you guys give me a hand? The mechanic says is a "little" lean at 5-6k but it will be fine as it is. Is it safe to run it the way it is of do I need to go back and adjust?
In order...
Surely.
Your mechanic is an idiot and should be working at Subway. I say this, because he can't give good advice on AFR's, so I assume he can't fix a car right either. Maybe he can fix a sandwich?
Go back and adjust. Post a screen shot of your fuel table and we will tell you what to do.
thirdgen is offline   Reply With Quote
Old 10-26-2014, 03:57 PM   #5
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,331
Default

Your tuner is a hack and your mechanic is an idiot. Chargeback the session on your CC, never go back there and don't go WOT until you get it retuned by someone who knows what they are doing.

I like how I agonize over 0.1-0.2 AFR points on cars I tune, and other tuners get away with **** like this. Sigh.
Savington is offline   Reply With Quote
Old 10-26-2014, 04:57 PM   #6
Newb
Thread Starter
 
Join Date: Sep 2014
Location: Ft Riley, Kansas
Posts: 14
Total Cats: 0
Default

Thanks for the opinion guys. The car was built by a different person which was the one who tuned it the way it sits. I asked this shop to run it on the dyno to see if the car had a "safe tune" to drive it on the weekends. The shop has nothing to do with the tune currently on the car. I guess I have some homework to do. Thanks again.
Oso787 is offline   Reply With Quote
Old 10-27-2014, 08:44 AM   #7
Newb
 
Join Date: Sep 2014
Posts: 16
Total Cats: -3
Default

try to get around 12 (AFR) at WOT.
11,5 - 12,0 is allways a good area for turbo cars. Subarus for example are factory richer - but lost power - tuners go around 11.5 AFR for more power and enough fuel for a bit cooling. (ROZ95 or better ROZ98 - dont know which ROZ pumpgas in USA is)

can you post your open loop fuel table?

Last edited by oshiikuru; 10-28-2014 at 03:41 PM.
oshiikuru is offline   Reply With Quote
Old 10-28-2014, 10:48 AM   #8
Senior Member
 
Join Date: Feb 2009
Location: Philadelphia
Posts: 815
Total Cats: 47
Default

I got a chip tune from a vendor here that ran at 12.5:1 at WOT. I asked the same question and was assured everything was OK. I believed them and drove the car with confidence. My motor lasted about 400 miles before the rings gave out and started burning oil, leading to piston skirt damage and eventually a full overhaul. According to the company and their lawyer, I'm no longer allowed to mention it directly, so I'll leave the guesswork of who it was up to the people.

Cliff Notes: get your **** retuned before you end up like me. The point is 12.5AFR is not acceptable for a turbo miata
Mazdaspeeder is offline   Reply With Quote
Old 10-28-2014, 11:02 AM   #9
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Yeah i heard about Begi running flashes like that. ****'s dumb.
concealer404 is offline   Reply With Quote
Old 10-28-2014, 11:07 AM   #10
Senior Member
 
Join Date: Feb 2009
Location: Philadelphia
Posts: 815
Total Cats: 47
Default

Quote:
Originally Posted by concealer404 View Post
Yeah i heard about Begi running flashes like that. ****'s dumb.
Who's that? Lol
Mazdaspeeder is offline   Reply With Quote
Old 10-28-2014, 11:12 AM   #11
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,196
Total Cats: 2,583
Default

You want to be between 11.5 and 12.0 anyone that tells you over 12 is acceptable on pump gas is a moron.

As already stated: you're too rich in the midrange and way dangerously lean up top. That tune is not safe.

Quote:
Originally Posted by Mazdaspeeder View Post
Who's that? Lol
ALPHA OMEGA BOW TO ME PEASANT

18psi is offline   Reply With Quote
Old 10-28-2014, 11:50 AM   #12
Senior Member
 
Join Date: Feb 2009
Location: Philadelphia
Posts: 815
Total Cats: 47
Default

OP, get retuned or your car will end up dead like the ***** of Babylon

My current tune is [email protected] This seems to be a safe area. Can I make more power going to 12? Probably. Is it worth risking my motor for? Nope.
Mazdaspeeder is offline   Reply With Quote
Old 10-28-2014, 01:59 PM   #13
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 8,465
Total Cats: 783
Default

Quote:
Originally Posted by 18psi View Post
You want to be between 11.5 and 12.0 anyone that tells you over 12 is acceptable on pump gas is a moron.

As already stated: you're too rich in the midrange and way dangerously lean up top. That tune is not safe.



ALPHA OMEGA BOW TO ME PEASANT


He was joking. Those people were the ones that fucked up his car.

Anyways, i've been saving that thread to go back and see what Corky said in it until i'm off work so i won't have to try to stifle my guffaws.
concealer404 is offline   Reply With Quote
Old 10-28-2014, 02:56 PM   #14
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,367
Total Cats: 1,331
Default

12.5 = melted ****
11.8 = safe forever
Savington is offline   Reply With Quote
Old 10-28-2014, 03:40 PM   #15
Newb
 
Join Date: Sep 2014
Posts: 16
Total Cats: -3
Default

The Subarus driving fine - the most nissans driving fine around 12AFR. Maybe its the difference in pumpgas? we are running 98+ (ROZ).

under 11 is a bit rich in my opinion.
oshiikuru is offline   Reply With Quote
Old 10-28-2014, 06:42 PM   #16
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,679
Total Cats: 1,561
Default

Quote:
Originally Posted by oshiikuru View Post
The Subarus driving fine - the most nissans driving fine around 12AFR. Maybe its the difference in pumpgas? we are running 98+ (ROZ).

under 11 is a bit rich in my opinion.
Yes, under 11 is too rich. We don't need 10.x

Our engine is different than Nissan and needs more fuel to be safe from detonation. 12.0 can be bad with the wrong timing
sixshooter is online now   Reply With Quote
Old 10-28-2014, 07:48 PM   #17
Newb
 
Join Date: Sep 2014
Posts: 16
Total Cats: -3
Default

On subis - 10.x can be bad with the wrong timing

on 95ROZ and around 10.5 (stock AFR 10.2 - 9.xx at WOT) with ~6PSI more boost, the engine feels some knocking.
on 98ROZ - all fine on my subaru (and at the STI from a buddy too) :-)

more boost and stock timing is always a bad thing. im going to tune the miata around 1degree each 1,4 PSI at the beginning and around safe 11.5 AFR at WOT (thinking this is a good starting point - or im wrong?).
oshiikuru is offline   Reply With Quote
Old 10-29-2014, 03:37 AM   #18
Senior Member
iTrader: (2)
 
Join Date: Mar 2014
Location: Meridian, Mississippi
Posts: 637
Total Cats: 42
Default

I know about RON (Research Octane Number) MON (Motor Octane Number) and AKI (Anti Knock Index (RON+MON)/2 )

Is ROZ the same as RON?

If so, premium fuel in the US ranges between around 95 RON for 91 AKI fuel, 97 RON on 93 AKI, and 99 RON on 94 AKI.

Keith
Twodoor is offline   Reply With Quote
Old 10-29-2014, 09:16 AM   #19
Newb
 
Join Date: Sep 2014
Posts: 16
Total Cats: -3
Default

ah RON must be the same as ROZ. I tought in US theres only 91 or 93 octane fuel (RON/ROZ).

so you turbo guys driving 97 ore 99 RON?


edit: here in germany we got 95RON, 98/100RON, 102RON, E85.
oshiikuru is offline   Reply With Quote
Old 10-29-2014, 11:45 AM   #20
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

Quote:
Originally Posted by Savington View Post
Your tuner is a hack and your mechanic is an idiot. Chargeback the session on your CC, never go back there and don't go WOT until you get it retuned by someone who knows what they are doing.

bolded for truth.
Braineack is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Got bad Crank Angle Sensor and Random Misfire codes, but runs fine. Greasyman General Miata Chat 2 09-28-2015 11:44 AM
why is my car running like pewp? (tune/datalog) itsMikey MSPNP 3 09-28-2015 07:40 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 01:38 AM.