Hi all... I think this is where I should post this...

I have an 03 Avalanche with some mods..check sig.. I am looking into supercharging my truck. Ok here is my question..

Which of these would be a better setup for a 5.3L

Vortec S-Trim (4GL218-058SQ)
ATI P-1 Procharger with aftercooler (1GI212-SCIP3C)
Whipple (99025P)

I am not going with the Radix because of cost... I don't see the reason to spend 6K on a blower.

Thanks for any info.
Bonedog

 

The cost of the other superchargers in question will come close if not equal the cost of the Radix in the long run.

If you want to truly bolt on trouble free performance.....Radix is the only way to go. If you have any questions please feel free to ask away!

 

You say they are all close to price as the Radix correct?? I can pick up the ATI with Aftercooler in polished for 4200 cheapest Radix I have seen is 55 or 5600 in satin. The Vortec was 3700 and the Wipple was 4000 last time I checked.

What else do I need with these systems? This will strictly be a street performance truck running between 6-8 psi.

Any help would be appreciated. I am new to the huffers on EFI.. I have a 8-71 with 2 4's on my hot rod. That was a simple fuel and spark upgrade. Am I missing something with the setup for EFI's??

 

What else do I need with these systems? This will strictly be a street performance truck running between 6-8 psi.

For street, the Radix can not be beat for bang for the dollar. The sponsor's here can beat any of those prices
A Radix truck would smoke me at this point.
My necessary "other mods" are
1. Vortech s/c $3000
2. PI 3000 converter $795
3. 43lb injectors $400
4. Tune $420
Like I said after all this a Radix truck would own me. The $4600 Ive spent could buy a new Radix.
I still need
1. Alk injection $350-$400
2. LT headers
3. smaller pulley
After that I should be pretty even, hopefully a little quicker.

 

Its crazy how many of these posts there are! The radix comes with about $1000 of stuff you still need to buy with the other kits(injectors and tune) You can go without these things, but you're leaving alot of performance on the table.

Try doing a search using Radix, vortech, ATI, and whipple as keywords. There is a ton of info comparing the kits.

 

Ok.. I did the search read the threads till I was red in the face. I still don't see the difference.

Example... the Radix comes with everything you say.. injectors all that jaz... ok the P-1 is a bolt on that can use stock injectors and I already have a program plus the tune they give me... I am not looking to race this truck WHATSOEVER.. I have my 79 malibu if I want to race... this is STRICTLY a street truck that weighs in close to 7 grand and can't really move the way I want her to. If I bought one of those kits and street drove it with the setup they gave me and I was around 6-7-8 psi the truck would still be close to 450HP at the tires correct?? That is plenty for the street and also.. what performance am I leaving on the table if I am not looking to race?

Why do I need a 3000 stall for the street? 46lb injectors?? all that other stuff? These other things are for max HP and TQ correct?? i just want reliability and some extra umph without spending 6 grand. 3300-4200 sounds like a good price range... 6 grand!!! I will put a worked 6.0L all motor in her and call it a day.

 

This quote pretty much sums up the reason you should buy the Radix kit. Spend a little more now and you will be much happier. There is NO other kit that offers more "under the curve" HP than the Magnacharger Radix supercharger. The other items that people are talking about are needed to help the other superchargers come "close" to what the Radix is. If you have any questions, please feel free to drop me a PM.

 

ok the vortec and ati are both centrifigual supercharger. so pretty much their turbo's running off of belt drives. so they have to really spin to get any boost out of them. you won't fell any boost until about 2500-3000rpm's that's why you need the TQ conv. the whipple is tried and true performer and works it just needs a litle tuning on most trucks and the kit doesn't come complete with everything just like the rest of them. If your not looking at racing your just wasting your money on the vortec and the ati. get the whipple if you don't want to spend the money on a radix.

 

Since you arent going to be racing your Avy and dont want a converter, I would go ahead and throw out any Centrificial charger (ATI, Vortec, Powerdyne, Paxton, etc). You want off idle boost to build the torque to get your boat moving. You want either a roots type (Magnacharger) or a twin screw(Whipple, Kenne Bell). With the radix kit you get everything to install it properly. The other kits use addon computers, supplimental injectors and fmu's to satisfy the added fuel demands of the blower. Since you dont plan on pushing it hard the Whipple or KB may work fine for your application but they just don't work well for a true performance application where the user is trying to get everything they can out of it.

 

all signs point to : Radix