The JWT Popcharger/Z tube combo feels sluggish at low rpms in comparison to the stock airbox. Anyone else feel this way? I think I'll put the stock airbox back on this weekend for further comparison.
Registered User
I don't feel that I lost any low-end power, but the gains appear to be in the mid/high rpm range.
Registered User
If there is little air flow down low, there is no restriction there fore no improvement. Oem system are all designed to create no more than 1% restriction at the torque peak rpm.
214 cubic inches /2=[107] .....that x rpm x VE]/1728= air flow in CFM.....thus max air flow 260 CFM at say 4400 rpm......maybe 300 CFM at redline and maybe 30 CFM at 60 mph cruise........7-8 CFM at idle.
The cylinders can never be more than 100% filled by atmospheric pressure.
Many times oem air box and intake are designed to eek out that last fraction of a MPG at 55-60 mph to help CAFE numbers.
When you change things in front of the MAF, the calibration is usually affected.......sometimes good sometimes bad.
214 cubic inches /2=[107] .....that x rpm x VE]/1728= air flow in CFM.....thus max air flow 260 CFM at say 4400 rpm......maybe 300 CFM at redline and maybe 30 CFM at 60 mph cruise........7-8 CFM at idle.
The cylinders can never be more than 100% filled by atmospheric pressure.
Many times oem air box and intake are designed to eek out that last fraction of a MPG at 55-60 mph to help CAFE numbers.
When you change things in front of the MAF, the calibration is usually affected.......sometimes good sometimes bad.