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Originally Posted by ZLRob
Update:...
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Hmm, my 2019 ZL1 SC750 from Callaway just has the stock airbox with a green filter.
Actually at WOT the barometric pressure drops up to 1.5 PSI which means the supercharger creates a vacuum in the intake.
This leads to high wear of my LT5 TB which usually only lasts 1-2 seasons each time before it starts dropping off throttle body codes at WOT.
The main restriction is caused by the air filter. The surface is just not large enough.
A cone intake like rotofab offers a lot more filter surface.
For sure doing cuts in the stock airbox allows to suck in more air through the restriction. I see it as 1 main restriction from the filter and another smaller restriction by the small opening.
106 Hz to be fair does not sound like alot to be honest.
I might gonna try this anyway, if I fixed my fender liner. Which basically is barely there anymore.
Can you share what exactly you did on your stock intake?
I did already cut out all the grids from the lower half. Worried about the upper half in terms of MAF reading with changed airflow.
I am considering cutting the lower half like in the first post of this thread.
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Callaway SC750 ZL1, DIY 1LE with added OEM 1LE Wheels, DSSV Suspension and 1LE Aero, FEA front control arms, DIY oil cooler, CWA 150 pump, bigger intercooler, Phenolic blower spacer, 82°C thermostat, BMR lockout kit, CTSV Brake Air Deflectors, Smooth idle cam, LS7 lifters, Bronze trunnion bushings. Tuned by JRE