Ok, so I called Procharger again to ask them about supercharger sizes concerning trucks.

P1SC Is what comes standard on for the truck kits. They are good enough for 35 pounds of boost! Plus the impellers are cut strait in the supercharger to create more boost at a lower rpm. And ATI said since the truck weight is a factor this is the reason why they use this one becasuse according to them it creates full boost at a lower rpm (under 3000 RPM).

P1SC-1 Is what comes standard for all F-Body Camaros, Firebirds, and Corvettes. Since they are lighter vechiles and have lowend power the impellers for the P1SC are cut more helical to create boost around 3000 and up.

P1SC-2 Is what they called for the Renegade Racing, the impellers are cut very severe so it makes full boost at the highest RPM.

As far as flowing etc and making more boost for power, and being easier on the blower they all flow the same, have the same housings except for the P1SC-1 which can spin up to 64,000 rpms. ATI also said that the D1 would be a little too much blower for my truck.

Also the prices that ATI gave me are list prices. I called the local dealer which sells Prochargers and they quoted me a price of $3398 for the basic kit and another $243 for the 3-core intercooler!!!! They also said they would order my kit with a smaller pulley for around 10-12 pounds of boost. But they also recommended me getting a new fuel pump and injectors.

According to them a RCSB 4.8 made 348 rwhp on 9 pounds of boost with a custom tune and shorty headers!!!

 

so compared to the radix kit, how complete is the ATI? Is there more ability for more RWHP? Sorry if the info has been covered.

 

That's some good info! I did not know they made so many various versions of the P-1SC.

 

I hope you arent taking what Im saying the wrong way, but what they tell you isnt likely to be the whole truth.
I recommend checking here and through the FI forum and see how many people that went with the P1SC are happy with their choice. Some arent unhappy, but all would RATHER have gone with the D1SC. Some had to eat it later and buy it outright.
Vortech told me the same crap about the V2 S trim I have. They rate it on their sheet as capable of 20# of boost. To get 14# on my smaller 5.3, I have to spin it 6K over MAX impeller speed!! Im spinning it at MAX right now (5K over the max efficiency mind you) to get 10# and shifting at 5800.
Better to spend a little more now than a lot more later.
I was told I could upgrade to a T trim at the time of purchase for $500. I was sold on the salespersons crap and didnt do it. To upgrade now would cost me near $1700 WITH the trade in of my blower. Im hoping to get around it, but we'll see if it happens.

 

Well, like most have said the ATI is capable of making alot more power than the Radix. But the kit isnt complete. If you were wanting to make 8-9psi the stock injectors and the fuel pump by ATI would work fine. But you still need a tune for it. If you were wanting to make boost at 2000 rpms and have a 1 day install that comes with a tune the Radix is the way to go. But if you want to make full boost around 3000 rpms and upgrade all fuel components and make hudge amounts of raw power the ATI is hard to look past. There is some issues with belt slip but you have to get around 500 rwhp before you expierance it. The Radix can spin a max around 18,000 rpms the ATI can spin to 62-64,000!!!!

 

The Radix is making 10# of boost at a little less than 18,000 rpms though. My Vortech is only making 10# at 50K. The smaller P1SC will probably only be making 10-12# at 60K or more!! Look at the G tim Vortech. It has to be spun to 60K to make like 8#. That is my point. The D1SC will make more boost at a lower RPM where as the P1SC will run out of steam and RPM much sooner. The discharge air from the P1SC will be hotter as well since it will be operating out of its efficiency range. Im just trying to point out things I wish others would have pointed out to me.

 

The Radix is making 10# of boost at a little less than 18,000 rpms though. My Vortech is only making 10# at 50K. The smaller P1SC will probably only be making 10-12# at 60K or more!! Look at the G tim Vortech. It has to be spun to 60K to make like 8#. That is my point. The D1SC will make more boost at a lower RPM where as the P1SC will run out of steam and RPM much sooner. The discharge air from the P1SC will be hotter as well since it will be operating out of its efficiency range. Im just trying to point out things I wish others would have pointed out to me.

WOW, thanks Greentahoe that makes sense to me now. Maybe I will look into a D1. The reason why when this motor bites the dust Im lookin into a built up 6.0 and I know the P1SC would run out of steam.

 

OK, NONE of the P1SC's will make anywhere near full boost at 3000 rpm. I have the standard P1SC with a 3.6" pulley. It makes 11psi at 5900rpm, and about 4psi at 3000 rpm. Doesn't sound like full boost to me. Whoever you talked to at ATI is full of ****!

Next thing, due to belt size availability, the smallest pulley you can use on the truck kits is a 3.6". I have a 3.4" ready to install, I had larger idlers machined to take up some belt slack. So that right there limits you to about 11-12 psi with the P1SC. Even if there were smaller belts availiable, smaller pulleys would slip anyway.

The D1SC makes about 11psi with a 4" pulley on a 5.3. A 3.6" would probably make 14-15 psi. Less belt slip, and more room to grow. D1SC all the way.

What are your goals with the truck? HP? Daily driver? ET? Towing?

 

P1SC....Too small. Put the D1 on there. It wont hurt anything. And if you decide to go all crazy then you will already have the size blower you will need. Then your going to have to worry about the brackets flexing and then chunking the belts. But I would recommend a D1.

 

Pretty much a street and strip truck wanting maybe 480 rwhp with a wideband tune and I think I might go with the VHP 045 cam. Of course I will also need a tranny and rearend. But screw what they say Im gonna go with the D1 for sure. What would a D1SC 11 pounds of boost, 5.3 with Dynatech headers, 045 VHP cam (I think 216-220 .551/.551 115 lobe) Borla exhaust make? The P1SC witha comp cam made 480rwhp according to the sites owners list. I think that will be more than enough for power.