Today I tested the difference between SD and MAF mode both in open loop (Dyno inside)
05-21-2006, 11:33 PM
#22
Originally Posted by Riddlerls1
i think he posted on the efilive forum that he had the MAF actually removed. i could be wrong though
He had a descreened ls6 maf. It should not be a restriction at all.
Great findings larry. I have to say I never approved of the SD bandwagon, looks like my holdout was worth the wait.
05-22-2006, 12:09 PM
#32
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I wish the search would fully work so that we could reference even more threads over a year ago that prove the SD vs MAF expectations. I think there are those of us out there that are almost blue in the face from screaming that there is little difference b/w the two for 99% of the setups out there. Don't get me wrong, tuning in SD is neat and intuitive and all, but in the end, all we are doing is buliding airflow models. Just so happens that one method tends to stay more stable over the long run, but if you're constantly tuning your car, then keeping things inline shouldn't be an issue either. I personally like everything set, and to be left alone.
BTW, Larry and Chad, nice to see that you guys have come so far!!! Now that you guys are "official" maybe people will start listening!!!
BTW, Larry and Chad, nice to see that you guys have come so far!!! Now that you guys are "official" maybe people will start listening!!!
05-22-2006, 12:41 PM
#33
Great results. The Speed Density tune definitely has its place and I do believe when you get to the higher RWHP setups you will see a gain by removing the MAF restriction. Lets face it our engines are only as good as the smallest point. If your running a 90mm TB than you should have a 90mm MAF.
05-22-2006, 01:56 PM
#34
The thing is though, if you have a DD you can run the MAF and then if you really feel the need to pull the MAF and run SD for a night at the track, its not hard to do. Put the SD tune in the car, yank out the MAF and be done with it 
I think having the MAF on a DD is good to prevent some of the SD issues there still are.
I think having the MAF on a DD is good to prevent some of the SD issues there still are.
05-22-2006, 02:05 PM
#35
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The weather changes is what got me the most so i am going to drive it around and see how much it is affected now. I think its a combo of a few things SD with the weahter and the OL part of the tune. So guess whose buying o2 sensors for test numero dos
I doubt it.
05-22-2006, 06:24 PM
#39
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It makes sense. There shouldn't be a difference in WOT with and without the MAF if you tune in a/f ratio.
At part throttle, with my car, there's no doubt in my mind the car has more low end tq and better throttle response without my MAF. I spent a month trying to tune the MAF. No matter what I did, the car was felt significantly faster around 2-3k rpms at part throttle without it.
At part throttle, with my car, there's no doubt in my mind the car has more low end tq and better throttle response without my MAF. I spent a month trying to tune the MAF. No matter what I did, the car was felt significantly faster around 2-3k rpms at part throttle without it.
05-22-2006, 07:36 PM
#40
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Originally Posted by silverTA2002
It makes sense. There shouldn't be a difference in WOT with and without the MAF if you tune in a/f ratio.
At part throttle, with my car, there's no doubt in my mind the car has more low end tq and better throttle response without my MAF. I spent a month trying to tune the MAF. No matter what I did, the car was felt significantly faster around 2-3k rpms at part throttle without it.
At part throttle, with my car, there's no doubt in my mind the car has more low end tq and better throttle response without my MAF. I spent a month trying to tune the MAF. No matter what I did, the car was felt significantly faster around 2-3k rpms at part throttle without it.