Radix kit for H2 boost results
#1
Finally got around to installing a boost gauge today and took the truck out for a couple of hard pulls to see what max boost is on the base H2 kit.
The only mods I have made are three 2-inch holes in the stock airbox bottom (still running stock filter - only 2800 miles on the truck) and a Magnaflow catback. Tuning is that provided with the kit. Pulley size is the 3.1 that was included with the supercharger.
Truck makes about 6.5 pounds of boost with 7 showing at the shift point. What is cool is that it offers up about 5 psi as soon as you hit the throttle.
I'm pretty happy. Now I need some dragstrip results.
Cory
The only mods I have made are three 2-inch holes in the stock airbox bottom (still running stock filter - only 2800 miles on the truck) and a Magnaflow catback. Tuning is that provided with the kit. Pulley size is the 3.1 that was included with the supercharger.
Truck makes about 6.5 pounds of boost with 7 showing at the shift point. What is cool is that it offers up about 5 psi as soon as you hit the throttle.
I'm pretty happy. Now I need some dragstrip results.
Cory
#2
Originally Posted by CHarris
Finally got around to installing a boost gauge today and took the truck out for a couple of hard pulls to see what max boost is on the base H2 kit.
The only mods I have made are three 2-inch holes in the stock airbox bottom (still running stock filter - only 2800 miles on the truck) and a Magnaflow catback. Tuning is that provided with the kit.
Truck makes about 6.5 pounds of boost with 7 showing at the shift point. What is cool is that it offers up about 5 psi as soon as you hit the throttle.
I'm pretty happy. Now I need some dragstrip results.
Cory
The only mods I have made are three 2-inch holes in the stock airbox bottom (still running stock filter - only 2800 miles on the truck) and a Magnaflow catback. Tuning is that provided with the kit.
Truck makes about 6.5 pounds of boost with 7 showing at the shift point. What is cool is that it offers up about 5 psi as soon as you hit the throttle.
I'm pretty happy. Now I need some dragstrip results.
Cory
#4
Originally Posted by Todd@ProDyno
dont chase down those srt10s quite yet...you need a bittttt more work, but youre close.
I also don't want to sacrifice reliability.
The next step is electric fans.
Cory
#6
Originally Posted by OCBC
I saw an SRT10 Crew Cab last night, didnt know they made them in the crews or "quads". It could have been rebadged, but the didnt seem likely.
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Choda
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Jan 22, 2026 02:03 PM







