Do “reputable” tuners use lean spool disable
Jun 1, 2008, 06:33 PM
#1
Do “reputable” tuners use lean spool disable
Does anyone know if the so called reputable tuners tune EVO with lean spool disable? Most big shop tune with EcuTek as oppose to ECUFlash so I am not sure if the option to disable lean spool is available in the EcuTek software.
Jun 1, 2008, 06:37 PM
#2
I think you are going to have to define "reputable".
Anyone that like having control over the fueling from start to finish with the hindrance of an ECU variable does.
The only tuner that I have yet seen even modify the lean spool value is Jestr and he extends its control out to its limit at 8K rpm.
I do not use lean spool because it has a noticeable bump in IPW at 7K when it stops (as set at the factory) and likes to extend the lean spool well into boost in most cases. It doesnt allow for as smooth an AFR curve when left on in my opinion either.
Anyone that like having control over the fueling from start to finish with the hindrance of an ECU variable does.
The only tuner that I have yet seen even modify the lean spool value is Jestr and he extends its control out to its limit at 8K rpm.
I do not use lean spool because it has a noticeable bump in IPW at 7K when it stops (as set at the factory) and likes to extend the lean spool well into boost in most cases. It doesnt allow for as smooth an AFR curve when left on in my opinion either.
Jun 1, 2008, 06:52 PM
#3
Maybe I should not say reputable tuners. But the ones that have you ship the ECU to them for reflash. And ussually uses EcuTek. I am not sure if it is OK to mention names or shops. But tuners like works, vishnu, DynoFlash that use EcuTek for flashing.
Jun 1, 2008, 07:02 PM
#4
I turn it off for all Evo 9's as some of them I just can't get "rich" enough for 91 octane at peak boost through the midrange. It also makes a huge difference in fuel tuning for all the other gears, espically when you row through them instead of just single pulls. Makes the AFR much much much more consistant on the street.
The 03-05's I don't see the same issues of too lean at peak boost through the midrange but I turn it off for them as well for the per gear fuel tuning.
The 03-05's I don't see the same issues of too lean at peak boost through the midrange but I turn it off for them as well for the per gear fuel tuning.
Last edited by razorlab; Jun 1, 2008 at 07:04 PM.
Jun 1, 2008, 07:54 PM
#5
How much do you have to lean the stock values from 2500 up to get an equivalent AFR to the OEM one with it enable. Will adding 1 unit to the original table gives the same AFR (or close) as the one OEM value with Lean Spool enable? I understand people do not tune for all the cells on the map but I guess the ones that does not change should stay about the same as the original values. At least the ones with load less than 100.
Jun 2, 2008, 03:56 PM
#7
Ok lets forget about the "reputable" part. Can you disable it with EcuTek or does it need to be a modified ECUFlash to do it. I am planing to have my car tuned by a local tuner and most of them if not all use EcuTek. So I do not want to have a tune and then have to retune if there is an issue by not having lean spool disable.
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Jun 2, 2008, 04:06 PM
#8
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hmmm interesting... would lean spool have anything to do w/ my odd AFR spike (lean) at around 5400rpm to 6500rpm? basically im at around 11.8 steady... and then it jumps right up to 12.5 (there is a thread about it) anyways, we tried to richen it up but nothing changes... So im having to use an AFCII to do it. So far its working... but its not the cleanest looking curve. Still has that bump... and you can see the IPW and IDC dip on Evoscan...
Jun 2, 2008, 04:46 PM
#9
Ok lets forget about the "reputable" part. Can you disable it with EcuTek or does it need to be a modified ECUFlash to do it. I am planing to have my car tuned by a local tuner and most of them if not all use EcuTek. So I do not want to have a tune and then have to retune if there is an issue by not having lean spool disable.
I do know the Cobb ProTuner has the option, and that is because I requested it during the testing phase. It originally did not.
Jun 2, 2008, 05:29 PM
#10
Thats interesting. I guess I will have to ask the tuner directly to find out. Since there are so many ROM IDs and all of them have different addresses I am kind of concern with the EcuTek flash and the current changes that I have made so far to my ROM. The other thing is that I have direct PSI boost control so I am not sure if an EcuTek flash will mess anything with that.
Jun 2, 2008, 06:20 PM
#11
At this current point in time, EcuFlash is leaps and bounds ahead of any other flash tuning solution for the 8/9 in that regard.
Jun 2, 2008, 06:25 PM
#12
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hmmm interesting... would lean spool have anything to do w/ my odd AFR spike (lean) at around 5400rpm to 6500rpm? basically im at around 11.8 steady... and then it jumps right up to 12.5 (there is a thread about it) anyways, we tried to richen it up but nothing changes... So im having to use an AFCII to do it. So far its working... but its not the cleanest looking curve. Still has that bump... and you can see the IPW and IDC dip on Evoscan...
Jun 2, 2008, 06:41 PM
#13
I am pretty certain that EcuTek does not support Direct PSI-target boost. Pretty much all the "MODS" you see on this board are for ecuflash only.
At this current point in time, EcuFlash is leaps and bounds ahead of any other flash tuning solution for the 8/9 in that regard.
At this current point in time, EcuFlash is leaps and bounds ahead of any other flash tuning solution for the 8/9 in that regard.
Jun 2, 2008, 06:43 PM
#14
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I leave lean spool enabled because I correct me im wrong please but I thought it worked with your temp adjust table to richen up the fuel during hotter weather.
If you tune to the edge with lean spool enabled your running risk of detonation at higher outside temps.
If you tune to the edge with lean spool enabled your running risk of detonation at higher outside temps.