The black art of turbo sizing...
 

...is really just all about compressor mapping and matching that to your needs. (CIDx0.5xRPMxVE... etc.) There are some great books by SA Design as well as HP Books. I personally think the actual powe-rband of these is so low, you would be wasting money unless you could were going to bolt on some junkyard pieces from an import.

Personally, I just want the instant throttle response of a POSITIVE DISPLACEMENT blower, like a twin screw compressor. THen no matter what RPM your at, when you hit the loud pedal you are getting WHAT YOU PAID FOR. Why pay for a 8PSI kit (50% more power) when it is only MAKING 8PSI at 5000RPM? With a twin screw, the boost is already there, all you gotta do is open up the throttle blade.

Houston area...
 

I am in the Houston area... and have an account with LKQ! :yup:

HP Loss = (elevation x 0.03 x horsepower @ sea level)/1000

For Colorado Springs (approx. elevation 6000 feet), I'm assuming you have a 2011 or earlier = 202 HP for the 3.8 L:

(6000 x 0.03 x 202hp)/1000 = 36hp loss

Now you are running around 166 HP...


33:yup:

Just add boost! (HP

Just add boost! You get 6.8% horsepower, at the same power band, per every pound of boost. So you would adjust your wastegate or pulley for another 3psi...or 39hp!

The EASY part is adding boost. The hard part is adding boost thats there WHEN YOU NEED IT... not where it showed up on a dyno. Go twin screw for a non-race JK, or a well designed turbo.

Forgive my stupid question, but what is an example of a twin-screw

Attachment 377682



Attachment 377681

These two are roots type and are less efficient then the newer twin screw where two machined helices compress the air better and generate less heat

Attachment 377683
New style twin screw supercharger, although they both do the same thing the twin screw is new technology

...now imagine your air intake is above those screws/lobes and your throttle body is below them. Think of allll that boost just waiting for you to hit the loud pedal! BANG! Whatever you paid for, 8lbs... 10... 22? It is INSTANTLY THERE. Thats why it is called a positive displacement blower.

Instant boost... from about 1,500 rpm all the way to redline.

Plus a viper t.b

The 3.8l has 2.5" diameter t.b and the viper t.b diameter is 3" so its a increase in air volume. The 3.6l has 3" t.b diameter already so its pointless.

and there are programers that will acount for the t.b diameter 3"

33:yup:

That good info. My concern was the same when I contacted the only company I know of offering the Stroker Kit short block, requested dyno results. No response? That tells me lots, plus I was thinking that you can add cubes but with no mods to the heads would it still be clogging on the exhaust stroke?