LS2 Intake manifold and LS7 maf swap thread
#143
I'm trying, some parts of the mid range wont take it, the top end seems like i can go 24-25, but thats something ill play with at the track. Car is very sensitive about timing for some reason, where as superglides car was not. I even desensitized the knock sensors by about 25% and it still shows up.
#156
So minor update to this thread, wound up ditching the MAF honeycomb in this instance with the LS7 maf. Did some research regarding the honeycombs and while the lower end clarity is better with the honeycomb, there is a slight overall reduction in the volume of air that can enter the intake at WOT causing a bit of a restriction regardless of how free flowing the honeycomb is compared to the stock one. The newer card style MAF's seem to be better suited to be used without honeycombs because of integrated air channeling built onto the MAF itself (see bosch example below). I wound up picking up about 4% increased fuel requirements across the board without the honeycomb which will net a little bit of a gain, but nothing I can actively measure. You can visually tell why our MAF sensors among other older styles require a honeycomb, they are straight open wire designs.
#158
Yeh, it was a negligible change in hz frequency, it went about 1-2 cells lower in the hz range without the honeycomb and I lost 1 or 2 overall, but the response across the mid range and top end is what I was looking for and that also picked up a little. Next thing on my list is going to be the vmax ported LS3 and the dynomax axle back.
#159
oh the whistling sound this LS3 tb makes never gets old lol i had a couple people already ask if it was a 3800 SC already. Although its not nearly as pronounced as a blower car, it is loud enough to easily hear it with the window down, sounds like someone whistling loudly from the front of the car.
#160
So minor update to this thread, wound up ditching the MAF honeycomb in this instance with the LS7 maf. Did some research regarding the honeycombs and while the lower end clarity is better with the honeycomb, there is a slight overall reduction in the volume of air that can enter the intake at WOT causing a bit of a restriction regardless of how free flowing the honeycomb is compared to the stock one. The newer card style MAF's seem to be better suited to be used without honeycombs because of integrated air channeling built onto the MAF itself (see bosch example below). I wound up picking up about 4% increased fuel requirements across the board without the honeycomb which will net a little bit of a gain, but nothing I can actively measure. You can visually tell why our MAF sensors among other older styles require a honeycomb, they are straight open wire designs.
You are referring to the stock ls4 honey comb right? And I'm in need of another, where did you order yours from?