Blown330

There isn't much question that a propely sized turbo will make the most power. Even in the stronger streetable applications the turbo may only take away 10hp or so compared to 60 - 75 for a centrifugal supercharger...even more for roots/twin-screws. There turbo system available for my truck makes boost at only 1900 rpm and makes full boost at 2500. Coupled with a FMIC that is 98% efficient the power just can't be matched with a blower. Guy who made the kit dyno'd 425/535 @ 8psi. Almost 70hp over a centrifugal at the same pressure.

moregrip

iTrader: (8)

i think you can consider the terms hybrid and modified synonymous for now

moregrip

iTrader: (8)

pedal response will always be better with a positive displacement setup. on the street that's what it's all about.

also, where did you get that 98% I/C effiecency number from? and what type of I/C'ing are you referring too?

jephs422

iTrader: (3)

Blown330

That FMIC is a custom dual-pass made for the F-150's. Datalogging during dyno tuning showed near ambient temps at the throttle body. I'm working on doing some of my own datalogging with an LM-1 to figure out compressor and intercooler efficiencies for my truck.

moregrip

iTrader: (8)

so this your typical dual pass air-to-water I/C setup?

GMC_DUDE

Cool! Sorry about the snarl. I'm in bed with the flu, and am a bit cantankerous.

Anyway back on topic. I looked at the options about 2 years ago, and this is my decision path. The 4.8 had OK power above 4000 RPM, but needed help in the low end. Since nearly all my driving is below 2500 RPM, that pretty much ruled out centrifugals. So my choice was Magnuson, Whipple, or Kenne Bell. At that time KB offered pretty much a blower, period. No injectors, no tune , no intercooler, etc.. Plus people were having customer support issues, so I put them at the bottom of the list. At first I was going to go with Whipple, but their piggy-back fuel enrichment system made me suspicious, and after asking their customer support a question, I was even less favorable towards them. I have heard that they have since changed, so you might want to check into them. That left Magnuson and the Radix. I won't sing their praises here, as that's been done enough elsewhere. I did have to swallow hard about coughing up $5000, but rationalized that it's better to pay a lot and get it done right the first time. It went in with only a few glitches, the worst being the fuel pump ('04 and newer trucks won't have this problem). I have been very pleased with its performance, as has nearly everyone else who has driven my truck.

At the time, STS wasn't out yet, so it didn't factor. However, I myself would still probably not go that route because: 1: I can't weld. 2: I wanted a complete kit if possible, so there would be no finger pointing if things went wrong. 3: I wanted the most low-end torque possible.

Hope this helps you in making your decision.

Blown330

No it's and air-to-air front mount.

moregrip

iTrader: (8)

ahh, I see. How do you get a Air to Air I/C to be 98% efficient? I ask because I have never heard of that high of an efficiency rating with this type of I/C'ing.

8ALTNG

iTrader: (1)

MoreGrip- I think that if you run a big enough air-air, on a dyno, with a big enough fan blowing on the truck during a run, on a cool day it would work.