Can anyone figure this out? No one seems to know.

[safe]

Originally Posted by Newbie911

I already have the SC. SC are low boost so the CR is different. I'm going to make it work. Thank you for your post.

I would pass on the TPC supercharger to someone else (like someone did to you). Inefficient supercharger and inefficient intake. The 50+ hp on a 3.6 with 0.7 bar is really piss poor at best....

Opposite to most else here I would not look at what Porsche did on boosted engines, Porsche had to make do with K-jet and primitive ignition control on most boosted air cooled engines.
I think you could get away with stock CR with boost if you have good control of fuel, timing, heat and boost.

I've been thinking about and calculating on a SC setup for my 3.6, its not very straight forward. A turbo setup would be easier because the boost is easier to control, not to mention that it would be much more efficient and much more power "under the curve".

YOU are the engine builder, YOU must figure out how to go about this. No one will tell you "go with 8.5 cr for a 3.6 tpc supercharger kit on a 3.0 sc engine", or something like that. Because no one really knows probably, and besides why should you believe them?
The alternative is to give the project to a professional and pay them to do all this.

Whatever you do E85 will help you a lot, if you have access to that!

[Steam Driver]

11:1 is way to too much CR for a supercharged engine. 8:1 to around 8.5 works well. Too low a CR makes the engine feel flat before the boost takes effect. The factory turbo CR is a good example of that situation.

Moving back in the thread some, one reason for bolt-on low boost is that at that level you’re operating within the parameters of the stock ECU program, thus no retuning is required.

There is more power to be had by backing down the CR, staying around 8:1, and increasing the boost rather than going to a high CR and backing off the boost and/or timing.