How much could a real dirty MAF affect tune?
11-22-2009, 02:41 PM
#1
How much could a real dirty MAF affect tune? Well I just put in a new cam and dyno tuned it, that should be gauranteed HP/TQ gains and I actually lost a bit across the board and only gained 3 peak HP. 
As soon as I left the dyno and got on the HWY the SES light went on and ended up being a MAF default. Previously I had pulled the screen on the stocker( it was damaged) and ever since then it hasnt put up as much HP even with the old set up and no changes. So I get the car home and pull the MAF, all the sensors are completely black and sooty. I wanted a new screen anyways so I went and got a new MAF.
Now the car seems to pull alot better drive better and Idle better than ever
b4.
My 2 questions are
1. How much could a very dirty descreened MAF affect the tune, even though it did seem to be working on the dyno.
2. Since the car was tuned with the dirty de screened MAF, how would putting a new one on effect the current tune?
PS Im going back on Wed to get on the dyno and check/adjust the tune for the new MAF.
Sorry for the long read. Just curious to see what you guys think.
Thanks
As soon as I left the dyno and got on the HWY the SES light went on and ended up being a MAF default. Previously I had pulled the screen on the stocker( it was damaged) and ever since then it hasnt put up as much HP even with the old set up and no changes. So I get the car home and pull the MAF, all the sensors are completely black and sooty. I wanted a new screen anyways so I went and got a new MAF.
Now the car seems to pull alot better drive better and Idle better than ever
b4.
My 2 questions are
1. How much could a very dirty descreened MAF affect the tune, even though it did seem to be working on the dyno.
2. Since the car was tuned with the dirty de screened MAF, how would putting a new one on effect the current tune?
PS Im going back on Wed to get on the dyno and check/adjust the tune for the new MAF.
Sorry for the long read. Just curious to see what you guys think.
Thanks
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11-29-2009, 04:44 PM
#8
LS1Tech Sponsor
the de-screen would affect it more than being a little dirty...
you want/need to have the screen in there for proper airflow across the sensor...
removing it does nothing for you, except cause problems/issues when you try to tune it...
you want/need to have the screen in there for proper airflow across the sensor...
removing it does nothing for you, except cause problems/issues when you try to tune it...
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
I would have never pulled the screen but it was damaged, probably causing more harm than good. So I yanked it. 