I was just wondering if there is any type of formula... like "x" psi of boost equals "x" amout of hp gain, and "x" amout of torque gain. Or even some type of rough estimate for a 4-cyl.
Also, is there a set range of boost-psi limit that you shouldn't go above on a stock 4-cyl engine? If so, what would that be by any chance?
Is it okay to run lower than 92 octane fuel on a stock turbo'd motor, if your not set for insanely high psi. Just for a moderate boost? I know there are chaneces of knocking, but some people say that higher octane fuel doesn't do much. What about 87, or midrange, and then just adding octane booster?
One more thing... I love working on cars, and learning more about them, but I love doing stuff myself, and rather than buy a turbo kit, I would like to get parts and build my own set and ot it on. I don't have a lot of money, so I would have the do it as cheap as possible. Any advice on what parts I should get, and maybe some cheap parts that will still be good in the long run.
I'm just trying to do my research before putting money into stuff.