Power Mod EMS for N/A tune - installed
09-02-2006, 02:21 AM
#26
Yes I have it . Had major problems with my laptop (hardrive failed) so tried my mates one & that did not have the right serial port - bought an adapter - that didn't work . Long story short SNAFU . So no pre mod tests 
Have a look at how I did the duct to factory box join in another thread
Hoping to get my laptop back this week & do some tuning .
Have a look at how I did the duct to factory box join in another thread
Hoping to get my laptop back this week & do some tuning .
09-02-2006, 02:25 AM
#27
Originally Posted by Brettus
Yes I have it . Had major problems with my laptop (hardrive failed) so tried my mates one & that did not have the right serial port - bought an adapter - that didn't work . Long story short SNAFU . So no pre mod tests
Have a look at how I did the duct to factory box join in another thread
Hoping to get my laptop back this week & do some tuning .
Have a look at how I did the duct to factory box join in another thread
Hoping to get my laptop back this week & do some tuning .
as to the adapter.. the serial port to usb is very picky.
beers
09-11-2006, 09:10 PM
#28
update:
Been fiddling with tuning the ems & logging with scanalyser . Had a lot of fun playing around with the tune but now realise there is quite a bit to it & doing repeated runs up to 9000 rpm in third can be a bit crazy.
Have got what I think is a good tune in it & found most power at around 0.85 lambda (approx.12.5 AFR) going off the factory 02 sensor . This seems to differ from what others have done with the interceptor etc , but I think it is due to sensor variations rather than anything else.
Also did some logging to find closed loop/open loop switch positions & found big differences with what others have reported on this site. Did this to check we could tune to 50% throttle position with out affecting closed loop - looks like we can .
I get (approx.) either /or
1st gear 40% throttle & 4100rpm
2nd gear 30% throttle & 4000rpm
3rd gear 30% throttle & 4000rpm
One of the big issues I have come up against is the major difference in AFR between gears . I got 3rd gear tuned very close then did a run in 2nd & found it was running too lean in varoius places.
I wonder if this is normal or if it is a result of the RB ram air duct ............
Timing the runs confirmed it - 3rd gear was 1.3s faster (than the tune supplied with the power mod) over a 13s acceleration run in third .
However 2nd gear run for same tune (over approx. 5s) was 0.1s slower - so have had to compromise between the two. Have not tested the other gears but figure 2nd & 3rd are the gears that will get most use in 100% throttle situations.
I am beginning to understand why Mazda tuned the car the way they did - so many things can affect the mixture .
Been fiddling with tuning the ems & logging with scanalyser . Had a lot of fun playing around with the tune but now realise there is quite a bit to it & doing repeated runs up to 9000 rpm in third can be a bit crazy.
Have got what I think is a good tune in it & found most power at around 0.85 lambda (approx.12.5 AFR) going off the factory 02 sensor . This seems to differ from what others have done with the interceptor etc , but I think it is due to sensor variations rather than anything else.
Also did some logging to find closed loop/open loop switch positions & found big differences with what others have reported on this site. Did this to check we could tune to 50% throttle position with out affecting closed loop - looks like we can .
I get (approx.) either /or
1st gear 40% throttle & 4100rpm
2nd gear 30% throttle & 4000rpm
3rd gear 30% throttle & 4000rpm
One of the big issues I have come up against is the major difference in AFR between gears . I got 3rd gear tuned very close then did a run in 2nd & found it was running too lean in varoius places.
I wonder if this is normal or if it is a result of the RB ram air duct ............
Timing the runs confirmed it - 3rd gear was 1.3s faster (than the tune supplied with the power mod) over a 13s acceleration run in third .
However 2nd gear run for same tune (over approx. 5s) was 0.1s slower - so have had to compromise between the two. Have not tested the other gears but figure 2nd & 3rd are the gears that will get most use in 100% throttle situations.
I am beginning to understand why Mazda tuned the car the way they did - so many things can affect the mixture .
Last edited by Brettus; 09-12-2006 at 05:36 AM.
09-21-2006, 04:35 AM
#29
Finally got the car dynotuned today & I'm very happy with the result.
189whp on a Dyno dynamics is equivalent to over 200 on US dynojet by all accounts.
We initially did some pulls with the map I had worked on to smooth out the afrs & found we were making less power than the original tune. Tried adding timing to that tune with no success .
Then Alec (from Kiwi RE ) tried taking out timing up top which gave more power but made it run too lean . Adding the fuel back in gave us more power again so that is where we left it . Ended up taking 6 degrees timing out from 6500rpm up.
According to Alec it is due to our crappy fuel - he finds that engines tuned in other countries never make the same power on our fuel & often has to take out timing to get the power back. Never heard this from anyone else here but it worked .
Green line is stock - no mods (4th gear run)
Blue line is- after duct,pulley & flywheel & ems set to zero. (4th gear run)
Black line is after dynotune. (3rd gear run)
189whp on a Dyno dynamics is equivalent to over 200 on US dynojet by all accounts.
We initially did some pulls with the map I had worked on to smooth out the afrs & found we were making less power than the original tune. Tried adding timing to that tune with no success .
Then Alec (from Kiwi RE ) tried taking out timing up top which gave more power but made it run too lean . Adding the fuel back in gave us more power again so that is where we left it . Ended up taking 6 degrees timing out from 6500rpm up.
According to Alec it is due to our crappy fuel - he finds that engines tuned in other countries never make the same power on our fuel & often has to take out timing to get the power back. Never heard this from anyone else here but it worked .
Green line is stock - no mods (4th gear run)
Blue line is- after duct,pulley & flywheel & ems set to zero. (4th gear run)
Black line is after dynotune. (3rd gear run)
Last edited by Brettus; 04-28-2013 at 04:06 PM.
09-21-2006, 07:27 PM
#30
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so it seems its not that hard to tune it, you just got to play with it right? This unit sounds like a good option for me because i am staying naturally asperated for now. What was your overall increase in whp from this unit? i understand that this is still just a rough tune.
09-21-2006, 07:42 PM
#31
Very easy to tune . Alec did say that a Motec would give me more tuning resolution but from what I saw I don't think it would be worth spending triple the price of this unit to get that.
Can't give an exact figure for OA increase as earlier (4th gear) runs did not go right to redline. Looks like just over 20whp up top & right back to 7500 rpm.
Wish I could go past the rev limiter as I'm sure that would improve 1/4 mile times etc now that peak power is at 8800rpm.
May be possible if I drive the injectors directly (which this unit can do) but i'm not sure what the factory ECU does when the rev limiter kicks in. Anyone know ?
Yes , this is a rough tune only . But when you are paying $150/hr for dyno time ..........
Don't think there is much more to be had anyway.
Someone asked about LTFT earlier & what effect it is having . Have run the unit over a month now & monitored what is happening with LTFT . In the first few weeks it was at -0.8% and now has settled at -1.6% .
Will this affect the tune ?
Well - we have tuned with this trim in place so the only time it will affect the tune will be for the first few days after a battery disconnect & then by only a small %.
Can't give an exact figure for OA increase as earlier (4th gear) runs did not go right to redline. Looks like just over 20whp up top & right back to 7500 rpm.
Wish I could go past the rev limiter as I'm sure that would improve 1/4 mile times etc now that peak power is at 8800rpm.
May be possible if I drive the injectors directly (which this unit can do) but i'm not sure what the factory ECU does when the rev limiter kicks in. Anyone know ?
Yes , this is a rough tune only . But when you are paying $150/hr for dyno time ..........
Don't think there is much more to be had anyway.
Someone asked about LTFT earlier & what effect it is having . Have run the unit over a month now & monitored what is happening with LTFT . In the first few weeks it was at -0.8% and now has settled at -1.6% .
Will this affect the tune ?
Well - we have tuned with this trim in place so the only time it will affect the tune will be for the first few days after a battery disconnect & then by only a small %.
Last edited by Brettus; 09-21-2006 at 08:06 PM.
09-30-2006, 06:28 PM
#34
Originally Posted by Brettus
Been fiddling with tuning the ems & logging with scanalyser . Had a lot of fun playing around with the tune but now realise there is quite a bit to it & doing repeated runs up to 9000 rpm in third can be a bit crazy.
Originally Posted by Brettus
Wish I could go past the rev limiter as I'm sure that would improve 1/4 mile times etc now that peak power is at 8800rpm.
I thought those pullies were freeing up so much power up there.
Originally Posted by Brettus
Someone asked about LTFT earlier & what effect it is having . Have run the unit over a month now & monitored what is happening with LTFT . In the first few weeks it was at -0.8% and now has settled at -1.6%
10-01-2006, 03:11 AM
#35
Originally Posted by MazdaManiac
If your LTFTs are negative, then you can still pull more fuel - you are not done tuning. 12:5 is a bit rich for some ranges (especially off the torque peak). You might want to shoot for 13:1.
LTFT's are calculated by factory ECU in closed loop aren't they ? So whatever I do in open loop ( I am only changing map points in open loop) should not be seen by the factory ECU .
Have been tuning in Lambda & checking acceleration at various rpm points . Am not finding any gains either side of my current tune which sits between . 0.85 - 0.89 lambda & minus 6deg timing above 6500 rpm .
10-01-2006, 03:33 PM
#37
Originally Posted by MazdaManiac
The rev limiter has nothing to do with that. The motor simply stops breathing at that point. Running it past 9200 achieves nothing without severe porting and balancing.
.
.
10-01-2006, 04:25 PM
#40
mine won't go over about 8900 according to scanalyser - which is about 9400 according the dash revcounter .
Moot point now - I've found I can't get rid of rev limiter with power mod as it must shut down ignition & I cant directly control ignition.
Moot point now - I've found I can't get rid of rev limiter with power mod
as it must shut down ignition & I cant directly control ignition.
Last edited by Brettus; 10-01-2006 at 06:44 PM.
10-31-2006, 02:42 AM
#45
Thought this might be of interest - its a chart showing acceleration with best tune to date vs no tune at all . Also has AFRs on there .
As you can see almost 0.5s better for 4000 to 9000 rpm .
As you can see almost 0.5s better for 4000 to 9000 rpm .
Last edited by Brettus; 04-28-2013 at 04:07 PM.
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