TPI Valves for your "do it yourself" Airbox mod

[NOS-PRO]

These TPI Valves from Thunder Products work great for airbox mods! I have these installed on my airbox mod and what's cool is I can open or close them.

The low-boy fits in tight places like the top of my airbox because of minimal hood clearance. I have the knobby installed on the sides. You can use 3 low-boys also.

All TPI valves come with a screen to keep snow and debris out while giving you extra air

https://thunderproducts.com/shop/total-performance-intake-tpi-valve/

 

[RTX]

Looks good.
Reading some of the other posts on airbox mods i was lead to believe there was some science behind the airflow and the turbulence that can be caused when adding airflow.
Looking at your air box its looking like your just plunking these things things in wherever you can fit them.
(Hope that did not come off as an insult because i did not intend it to be one)
Did you do the evo dyno testing with these in your airbox?
Are you running these in addition to the modifications to the intake area on the bottom side of the air box?

 

[stingray719]

I can answer that. Terry has the original air box mod, I tested several designs and found for stock sleds the cut out only on the bottom kept air flow high and I liked that one the best for relatively stock sleds. Terry has header, can other mods and the added air flow of the additional holes hurts air velocity but makes up for it in more air overall. Either design works but I prefer the bottom cut out only for stock sleds. If you go all out performance do the additional holes, the advantage to the TPI valves is you can shut them off.

 

[RTX]

I see what your saying.
Right now im just running the evo can and stock airbox mod.
Makes sense that adding the evo reflash and a header would need more air.
Thanks

 

[NOS-PRO]

Looks good.
Reading some of the other posts on airbox mods i was lead to believe there was some science behind the airflow and the turbulence that can be caused when adding airflow.
Looking at your air box its looking like your just plunking these things things in wherever you can fit them.
(Hope that did not come off as an insult because i did not intend it to be one)
Did you do the evo dyno testing with these in your airbox?
Are you running these in addition to the modifications to the intake area on the bottom side of the air box?

Nope, good post RTX, I was going to just use some other type of screening, but then I couldn't shut them and see if the mod made a difference or not....especially running back to back on the track. The key is to get air in there. You could put 3 low boys TPI Valves right on the top, but I see it best 1 on each side, 1 on the top and then opening up the bottom for the most hpr.

Yes, my airbox was the one used on the dyno all day (besides the stock one).

Yes, I am running both mods (holes on top and sides plus the opening on the bottom). We tested the way mine is now (fully open with both mods) and shut the top vents between pulls on the stock Viper with performance flash and without header/muffler. The airbox mods (both) made more power up on top fully open.

 

[NOS-PRO]

This is a project that Lonn from Thunder Products and I have come up with to help with making the airbox pull in cooler air and provide more flow. On top of the airbox is #1, closest to the venturi, #2, brings in cooler air, #3, keeps snow dust from getting into the intake and #4 creating more power.

Not only can you open or shut the valves (removal of hood is needed to open or close...or some have come up with a cable that will open and close them) in specific instances.

I positioned the 3 TPI valves on top of the airbox, marked where the base of the TPI valve needed to enter the airbox and created a template to position the 3 equally.

Using a roto-zip tool, I cut out the openings and pre-drilled for the screws that come in the TPI valve kit.

Whole thing with disassembly, cutting, trimming and cleaning took me about 30 minutes to do.

These TPI valves are the cats a$$ when it comes to doing airbox mods! No matter where you put them

 

[Alsim]

View attachment 113345 View attachment 113344 View attachment 113346

This is a project that Lonn from Thunder Products and I have come up with to help with making the airbox pull in cooler air and provide more flow. On top of the airbox is #1, closest to the venturi, #2, brings in cooler air, #3, keeps snow dust from getting into the intake and #4 creating more power.

Not only can you open or shut the valves (removal of hood is needed to open or close...or some have come up with a cable that will open and close them) in specific instances.

I positioned the 3 TPI valves on top of the airbox, marked where the base of the TPI valve needed to enter the airbox and created a template to position the 3 equally.

Using a roto-zip tool, I cut out the openings and pre-drilled for the screws that come in the TPI valve kit.

Whole thing with disassembly, cutting, trimming and cleaning took me about 30 minutes to do.

These TPI valves are the cats a$$ when it comes to doing airbox mods! No matter where you put them

Nice Terry!
Is it in addition of Stingray airbox mod update ?

 

[gpxsrx]

Nice install Terry.

 

[NOS-PRO]

Nice Terry!
Is it in addition of Stingray airbox mod update ?

No, this is all by itself and the removal of the snorkel from the inside. Only cutting to this one was to install the TPI valves.

My goal with this one is to see how much air will get into the airbox (using AFR readings, plug color and rpm increase) so if it pulls the right amount....this method will work great for those running 87 octane and want an airbox mod.

I have three airboxs I'm working with now, testing and trying different things.