Dyno or Datalog Tuning; which is preferred?
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From: West
E55 AMG
Dyno or Datalog Tuning; which is preferred?
As the title states, which method do you think is best? I would tend to lean toward datalog tuning, as one would be able to replicate real world conditions more accurately. The only reservation I would have is regarding the quality of the wideband O2 used by most datalogging tools. The dyno shop I have typically used in the past to tune with states they have a wideband sensor that is close to $1500 and is very accurate. How much more accurate is that sensor versus your standard O2 that comes with a ZT-2 for instance?
Any other caveats, thoughts etc.?
Any other caveats, thoughts etc.?
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From: A to the Z (the state)
'06 E55
Data logging. Like you said, it's "real world", plus you can pull in other measurements like IATs and timing in addition to AFR.
But on a dyno, you can stand somewhere behind the car and hear that glorious exhaust noise.
But on a dyno, you can stand somewhere behind the car and hear that glorious exhaust noise.
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From: A to the Z (the state)
'06 E55
Very valid point. I live out in a somewhat secluded area and even out here I find it hard to get in some good pulls anywhere. I try not to do stupid stuff when other cars are around on the road, or near neighborhoods, etc.
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From: West
E55 AMG
Definitely a consideration for sure. A trip to the local track is one idea.
Does anyone know how much of a difference there is between the cheap ZT-2 sensor and the uber expensive dyno sensor?
Does anyone know how much of a difference there is between the cheap ZT-2 sensor and the uber expensive dyno sensor?
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From: new ringgold pa
99 ford lightning
I have been using the zeitronix since 05 on the cobras, saleens, and lightnings and now my car. On the e55 I like to do a street pull to get the air fuel adjusted then hit the dyno.
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From: West
E55 AMG
So you're using the dyno to dial in further or just to see where your power is at relative to previous dyno pulls you've made?
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A Merc
Down the 1/4 is best with data logging via zt2 because you will nail all 3 gears, next best thing is a dyno with zt2 logging. I was able to get tuned on the dyno in like 2 or 3 pulls with zt2 data logging
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From: Miami, FL
E55 AMG + Mustang GT
From my experience data logging has always been one of the most accurate ways to dial in the tune. However, a good tuner with a load based dyno (like dyno dynamics) can get the tune very spot on. It can be so spot on that when you do data log afterwards, there's no need to change anything sometimes.
I'm not saying that a good tuner cannot do the same thing on a dyno jet, but from my experience the tunes on a load based dyno have typically needed less adjustments.
I'm not saying that a good tuner cannot do the same thing on a dyno jet, but from my experience the tunes on a load based dyno have typically needed less adjustments.
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E63
So on this platform what is rich and what is lean? I have always preferred to be in the 11s for boosted applications and 13s for NA applications, does this hold true here too?
How dangerous is running mid to high 12s AFR on this engine?
How dangerous is running mid to high 12s AFR on this engine?
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From: Texas
2003 CL55
Weather to tune in is another consideration. I like to be tuned in cool, dry weather, so IATs, knock retard and other heat related factors do not effect the base tune. I prefer to dyno tune and then use the limited data log parameters we get feed on our cars to back up live road conditions. Our data log feed info is limited/slow, so as compared to HPtuning live (like on GM cars) it is still lacking , imo. Being able to monitor and control knock retard by degrees pulled @ rpm is crucial for road tuning feedback and tune adjustments. May want to add a knock retard meter for optimum feedback.
Here is a little blog on knock retard for inquiring minds. http://www.zzperformance.com/blog/ab...ock-retard-kr/
Here is a little blog on knock retard for inquiring minds. http://www.zzperformance.com/blog/ab...ock-retard-kr/
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
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From: Florida
A Merc
Yes the GN guys tune off KR, I like to use the timing feedback as a tool for KR. As long as you are only using the obd for timing and iats, you will see timing being retarded very quickly if there's knock.
This is why many tuners love the zt2 and dashdaq combo,it gives them a lot of feedback for tuning instead of just a dyno and afr
This is why many tuners love the zt2 and dashdaq combo,it gives them a lot of feedback for tuning instead of just a dyno and afr
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haters crazy
Depends... If it's a new setup that hasn't been done before you may want to start on the dyno keeping an eye on the vitals so you let out if things start to go bad. Also in reference to the dyno AFR vs on car wideband, keep in mind the dyno reads at the tailpipe whereas the one on the car should read alot closer to the motor and pre cats so in theory it would be a more accurate representation of what's coming out the engine.
I tuned mine on the track last time. This is where a track rental is really helpful
I tuned mine on the track last time. This is where a track rental is really helpful
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From: West
E55 AMG
I have a spare bung (lol) to place a dyno wideband into and have always used that when tuning at the dyno. I plan on taking logs at a track and have the tune based off of those. The last tune done on my car is spot on, and Ive only added a bigger TB, so it may lean out a touch, but still within safety range of the tune I have.
Thanks for the feed back everyone!!
Thanks for the feed back everyone!!
