Quote Originally Posted by Fivefingerdeathpunch View Post
Turbo car with straight rape a twincharged car when done right.
Um...no. At the track, with drag radials or slicks, I guarantee my twincharged car would destroy most turbo cars with the same internal mods. I only have a ST2 cam and 105# springs. If I was to upgrade to a ST5 cam, some ported heads, 130# springs, and up the boost to 20psi, I guarantee I would decimate mos, if not all turbo 3.8s out there (minus DarkHorizon who's Fiero weighs half of what a GP does )

The OP is right about how the power is distributed. The supercharger is there for low end power and it spools the bigger turbo faster. Most turbo GPs run a T61 turbo so it makes some power around 3500rpms. A properly setup twincharged setup (like mine) will be able to spin a larger turbo (T67 in my case) at around the same, if not lower, rpms. I'm at full spool at 3000rpms, and making a lot more power than a T61 would be making at those rpms.

Quote Originally Posted by ctracer View Post
unless you have a diff blower the eaton will max out pretty quickly on a turbo setup.
by that time it'll be a restriction rather than a help.
stock heads will be fine on a turbo build, but porting will def help especially if you get a nice turbo cam.
yes turbo lag sucks...but at the same time how much power is actually usable in those low rpm's? usually low rpm power translates to wheel spinning. our 3.8's have the capability for a lot of torque as it is.
WAY WAY WAY incorrect info here. The supercharger is NOT a restriction when it comes to a twincharged setup. It's a positive displacement blower, so it literally takes everything that is put in front of it and slings it into the motor. The best analogy I've heard is this: Think of the blower as a garbage can that can normally hold 50 gallons of trash. his is a normal GTP motor with the M90. Now, lets say you have a trash compactor and you put all of your trash into the compactor before you put i in the trash can. You can fit a lo more trash into the trash can after it's been compacted, right? This is how a twincharged setup works.

Also, spinning wheels is not something that should be corrected be limiting the power of the motor. Upgrading to better tires and learning how to launch a high powered car on the street is how you compensate for spinning wheels.