LS7 card style MAF and tube info
02-22-2013, 04:13 PM
#1
LS7 card style MAF and tube info What diameter tubes can the card style MAF adapt to? Most of the aftermarket support is 4" tube, how about 5"
How sensitive is the MAF to non rigid mounts? IE MAF slid into a rubber boot vs hard-mounted to a tube
Reason Im asking is I have a blown engine and a 5" intake would better feed it than a 4" where there is no aftermarket currently. Next, packaging the intake is tricky, and a MAF mounted in a silicone coupler between the airbox and TB would be easier than building the MAF tube into the airbox
Thoughts/comments?
How sensitive is the MAF to non rigid mounts? IE MAF slid into a rubber boot vs hard-mounted to a tube
Reason Im asking is I have a blown engine and a 5" intake would better feed it than a 4" where there is no aftermarket currently. Next, packaging the intake is tricky, and a MAF mounted in a silicone coupler between the airbox and TB would be easier than building the MAF tube into the airbox
Thoughts/comments?
02-23-2013, 12:16 AM
#2
The ls7 maf's are extremely sensitive to turbulence and positioning. I'm not sure on the 5 inch diameter, but I know a lot of people have problems with them on stock f body intake routing. Mounting it in a bend in the tubing would surely cause a tuning nightmare.
02-23-2013, 01:32 AM
#3
i had no problems tuning with mine...seems hit or miss.....what motor needs a 5 inch inlet????
not starting a fight here...but lots of guys make crazy power with no more than a 4...
not starting a fight here...but lots of guys make crazy power with no more than a 4...
02-23-2013, 08:48 AM
#5
The biggest problem is that going from a 4" to 5" is the 56% increase in area, which translates into a 56% reduction in resolution of the sensor.
The sensors are specifically sensitive to turbulence & stratification. The ideal situation would be putting it in a long straight section of pipe. Typically, recommendations are to mount the sensor with a miminmum of 5 diameters upstream & 2 diameters downstream from any bends or transitions. Not an easy task in the typical underhood area.
I actually just put together an inlet system with 4" aluminum tubing & it required a 28% increase in the MAF tables to get it within reason.
As for needing 5", I cannot see why... especially in a forced induction application. There are a lot of 1000+rwhp cars running a 4" inlet. If your airbox is only a coupler distance away from the t-body, you are better off keeping everything the size of the t-body to minimize turbulence & poor readings. This makes speed density sound a lot more appealing.
The sensors are specifically sensitive to turbulence & stratification. The ideal situation would be putting it in a long straight section of pipe. Typically, recommendations are to mount the sensor with a miminmum of 5 diameters upstream & 2 diameters downstream from any bends or transitions. Not an easy task in the typical underhood area.
I actually just put together an inlet system with 4" aluminum tubing & it required a 28% increase in the MAF tables to get it within reason.
As for needing 5", I cannot see why... especially in a forced induction application. There are a lot of 1000+rwhp cars running a 4" inlet. If your airbox is only a coupler distance away from the t-body, you are better off keeping everything the size of the t-body to minimize turbulence & poor readings. This makes speed density sound a lot more appealing.
Last edited by Lonnies Performance; 02-23-2013 at 08:55 AM.
