Reading AFR values?
#1
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Apr 2009
Location: Chesterfield, UK
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
Reading AFR values?
Hi guys,
I've recently fitted a K&N Shortram induction kit with the heatshield jobby... while i suspect everything will be OK i just wanted to make sure it wasnt sucking in too much hot-air and making engine run rich (and possibily killing it!)
whats the best / cheapest way to get some diagnostics in realtime? is there anyway I can plug my laptop into the car and get some software to plot a chart while i rag it down road..... or am i getting a bit optimistic there lmao
any ideas guys?!
Cheers
Will
I've recently fitted a K&N Shortram induction kit with the heatshield jobby... while i suspect everything will be OK i just wanted to make sure it wasnt sucking in too much hot-air and making engine run rich (and possibily killing it!)
whats the best / cheapest way to get some diagnostics in realtime? is there anyway I can plug my laptop into the car and get some software to plot a chart while i rag it down road..... or am i getting a bit optimistic there lmao
any ideas guys?!
Cheers
Will
#3
Unmapped 12.4s @ 105
iTrader: (29)
Join Date: Apr 2005
Location: Newcastle. 330bhp-289lb/ft @ 1bar boost - 12.4s @ 105mph
Posts: 11,776
Likes: 0
Received 4 Likes
on
4 Posts
EcuTek DeltaDash
There's also plenty of open source software available.
For checking AFR's you'll need something like this.
LM-2 Wideband O2 Digital Air/fuel Ratio Meter
#7
Scooby Regular
Thread Starter
iTrader: (1)
Join Date: Apr 2009
Location: Chesterfield, UK
Posts: 225
Likes: 0
Received 0 Likes
on
0 Posts
yeh it a newage mate..... so i dont need to worry about lean / rich then
on that topic... is it worth taking the resinator off the wing to help improve the airflow the IK?
on that topic... is it worth taking the resinator off the wing to help improve the airflow the IK?
Trending Topics
#8
Scooby Regular
iTrader: (2)
Join Date: Mar 2002
Location: Spec C - 12.5 @ 110(340/350)
Posts: 2,314
Likes: 0
Received 0 Likes
on
0 Posts
No that's bad advice. The ECU can only do so much with it's fuel trims to compensate, so depending on the diam of the induction kit you might want to get it checked out.
#9
Former Sponsor
iTrader: (4)
Join Date: Jan 2001
Location: ECU Mapping - www.JollyGreenMonster.co.uk
Posts: 16,548
Likes: 0
Received 2 Likes
on
2 Posts
as blue says, plus the temp of the air is not the main concern but the aomunt of air and how the induction kit alters the maf sensor reading whcih the ecu uses to know how much fuel to inject and ignitiobn advance to run.
It need mapping with induction kit on there
Simon
It need mapping with induction kit on there
Simon
#10
Surely if the MAF is in the OEM housing then the volume of air being measured by the MAF sensor does not change. All the MAF is measuring is airflow and whether the air comes from an induction kit or from the OEM induction it doesn't matter.
Or am I missing something, I usually am LOL
I've got a RCMS induction kit with a larger housing so the MAF needs re-scaling.
Is your MAF using the OEM housing ??
Shaun
Or am I missing something, I usually am LOL
I've got a RCMS induction kit with a larger housing so the MAF needs re-scaling.
Is your MAF using the OEM housing ??
Shaun
#11
Former Sponsor
iTrader: (4)
Join Date: Jan 2001
Location: ECU Mapping - www.JollyGreenMonster.co.uk
Posts: 16,548
Likes: 0
Received 2 Likes
on
2 Posts
the filter on the end of the maf housing effects the air flow reading..
Agreed it should be in a similar ball park with same maf housing but tend to find the maf reading is lower with less restriction on the filter and therefore the load seen by the ecu is lower and therefore it runs more ignition advance and less fuel.. bad.
Simon
Agreed it should be in a similar ball park with same maf housing but tend to find the maf reading is lower with less restriction on the filter and therefore the load seen by the ecu is lower and therefore it runs more ignition advance and less fuel.. bad.
Simon
#14
Thanks Simon
Just looking at my RCMS induction kit I can't imagine the airflow over the area the MAF is situated is particularly "laminar" and smooth.
I guess the ECU needs to be sorted for whatever induction cone takes the air in
I was thinking back to my A level days (I'm old !!) of Bernoulli's laws and Reynolds number LOL
Reynolds number - Wikipedia, the free encyclopedia
Cheers
Shaun
Shauh
Just looking at my RCMS induction kit I can't imagine the airflow over the area the MAF is situated is particularly "laminar" and smooth.
I guess the ECU needs to be sorted for whatever induction cone takes the air in
I was thinking back to my A level days (I'm old !!) of Bernoulli's laws and Reynolds number LOL
Reynolds number - Wikipedia, the free encyclopedia
Cheers
Shaun
Shauh
Thread
Thread Starter
Forum
Replies
Last Post
Sam Witwicky
Engine Management and ECU Remapping
17
13 November 2015 10:49 AM