Quote:
Originally Posted by SolGTP
FYI
the current S/C kit out there for the Kappas does not keep the engine in boost all the time. It has a boost bypass valve built into the S/C the keeps the engine in vacuum until you go WOT, then it closes and you have instant boost. There is also no addtional maintenance to it as it has it's own oil system that is good for 100k miles
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That is what I was going to say the SC's are superior to turbos for gas mileage and maintence they have a bypass which runs most of the time unless you are on boost. The bypass it always active and modulates through partial throttle and then WOT. It is instant boost not laggy like some of the turbo even the sky RL turbo.
Now I have 2.0 liter Acura RSX Type S is makes a little more stock 180 Whp compared to 135 whp, but with the SC at 11PSI. I make 200 whp at 2500 rpm (Which is more than stock at just off idle) then a whopping 320 whp at 8800 rpms. With torque dropping past 8K. I hardly have to drive hard or even get on the car to accelerate quickly and making so much power down low means that I can remain in the lower rpm not engaging Vtec. Still using the variable valve timing though thus saving gas.
Yet, I get 35 mpg on a bad day. Now if I get into the pedal I can suck gas at an incredible rate and get down to 15 mpg or less. Yet trips where I am just cruising 70-80 mph 35 mpg or just town crusing it sipps fuel.
Now with my car stock (no more SC) I find that I have to beat on it to get it to move meaning my gas mileage goes down. 22-28 zone.
I also find this with the Redline it needs a great tune to wake it up. The BSR is good, but it still needs some more gusto off idle and up top.
I know when I have a good tune when the car is silky smooth on acceleration and just seems to want to go effortlessly instead of having to force it. Turbo act different on different days good some days and bad others. Unless you can tune it daily.