2 Bar Map Sensor
Team Owner
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From: cookeville tennessee
Team Owner
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From: Here
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Tech Contributor
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From: Forney Texas
Many MAF tuned cars are running stock MAPs. How? The car is tuned to add fuel through a multiplier table that kicks in at a certain throttle position and your MAF is based on how much air is flowing through it and adjusted accordingly.
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From: Forney Texas
Not definitely. There's some tricks to scale the MAF back if you want to keep it. The problem with going 2-bar is that many tuners lack experience with it and it can be very time consuming to get all of the driveability stuff properly worked out. Many capable tuners don't have or aren't willing to spend the time to dial in all of the tables properly.
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Not definitely. There's some tricks to scale the MAF back if you want to keep it. The problem with going 2-bar is that many tuners lack experience with it and it can be very time consuming to get all of the driveability stuff properly worked out. Many capable tuners don't have or aren't willing to spend the time to dial in all of the tables properly.
Former Vendor
Joined: Jul 1999
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From: Indianapolis Indiana
St. Jude Donor '11
We have been tuning SC'd C5's for years on stock MAP's and MAF's for a long time and have even done 800+ at the tires with such. This was before 2 Bar MAP's were talked about and we worked through the problems. It was not the correct way to do it but it worked.
The 2 Bar MAP I use on C5 Vettes is a GM 12615136 and works great up to 15 PSI and I would just keep the MAF for better driveability. It does take a while to get through everything and therefore costs more to tune, but it is nice to have at least a base line tune from a few cars here to have a good start.
Hope this helps.
Mike Norris
The 2 Bar MAP I use on C5 Vettes is a GM 12615136 and works great up to 15 PSI and I would just keep the MAF for better driveability. It does take a while to get through everything and therefore costs more to tune, but it is nice to have at least a base line tune from a few cars here to have a good start.
Hope this helps.
Mike Norris
Burning Brakes
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Melting Slicks
Joined: Nov 2008
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From: NOLA
My car is much better speed density than before. I have the cobalt sensor and my tuner spent quite a while getting everything just right
Former Vendor
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From: Indianapolis Indiana
St. Jude Donor '11
First, someone did not properly calibrate the MAF.
Second, the BOV was too close to the MAF and causing a lot of turbulence in the MAF.
I see the second issue with the BOV a lot as folks like to mount a BOV up high to show it off. If it is within 10-12 inches of the MAF it can skew it terribly, especially if it has no screen or is a blade style MAF. I just had to changeover a 2002 TA to SD for this very reason. The idle was crazy erratic (as well as the MAF readings) and the BOV was 6 inches in front of the MAF. While it was sitting there idling we pulled the boost/vacuum reference off the BOV to close it and the idle (and MAF readings) smoothed right out.
Again, a few ways to skin this cat for sure.
Mike Norris
