As I read through the thread "What did you do to your Tahoe today" I keep seeing something about a Swiss cheese mod. I assume it has to do with drilling holes in the bottom of the airbox creating greater airflow. Am I correct and does it have a noticeable improvement in performance
Swiss Cheese Mod
- Thread starter bankswood
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Physh1
Full Access Member
- Joined
- Jul 29, 2010
- Posts
- 773
- Reaction score
- 24
In combination with other mods, yes, it can have a slight seat of the pants improvement...since it's free it's even better.
remove airbox completly, remove metal plate from under air box.
2 methods toopening airbox.
Cut out entire bottom leaving just the mounting boss's
OR
use a bigass hole saw bit to cut out four 4" holes in bottom of airbox.
Best method? cut out entire bottom.
Buy 4" pipe and silicone adapaters and make your own tube from MAF to TB.
Not you have a HDR (Home Depot Racing) CAI, it works very well for the 40$ you will spend on pvc and silicone adapters.
Remember, theres NOTHING different between a K&N, AEM, Specter, etcetc TUBE! They are simply TUBES
Its where you get the air thats the biggest issue. Stock airbox with no bottom is absolutly the best, in terms of cost VS performance.
My AIT's run 199 @ idle with specter, buddie runs the HDR setup above, his IAT's are 178.. I knw this by my predator programmers real time diagnostics setting.
2 methods toopening airbox.
Cut out entire bottom leaving just the mounting boss's
OR
use a bigass hole saw bit to cut out four 4" holes in bottom of airbox.
Best method? cut out entire bottom.
Buy 4" pipe and silicone adapaters and make your own tube from MAF to TB.
Not you have a HDR (Home Depot Racing) CAI, it works very well for the 40$ you will spend on pvc and silicone adapters.
Remember, theres NOTHING different between a K&N, AEM, Specter, etcetc TUBE! They are simply TUBES
Its where you get the air thats the biggest issue. Stock airbox with no bottom is absolutly the best, in terms of cost VS performance.
My AIT's run 199 @ idle with specter, buddie runs the HDR setup above, his IAT's are 178.. I knw this by my predator programmers real time diagnostics setting.
just pull it out one day and look, you will know.
The oem tube is a hemholtz resonator. think of it as a muffler but in reverse.
The oem tube is a hemholtz resonator. think of it as a muffler but in reverse.
Last edited:
the main reason is to quite down the air flow noise. With a straight through intake you will here the air flowing through. kinda like when a 4 barrell carb opens up.
Yeah, I'd like to see it. I plan on cutting the entire bottom of the box out. Will that alone significantly increase air flow or do I need to cut some holes in metal plate also?
