So today I want to talk about the smooth boost control system kind of what it is and what it isn't so the smooth boost system is a bypass Valve controller so you can take it'll take things like uh pedal position and then control the amount of air bypass that the super seats so for example if you had a smooth boost control installed on your system on your car um it's a a uh actuator that will control the amount of bypass so if you have it at Max and it comes with this little dial deal this is just a linear potentiometer so if you have it on Max and your holy setup will produce 18 PSI then the by pass valve as soon as you go Full Throttle the bypass valve will go fully shut no air will be bypassed and any air ingested will be compressed and ingested by the engine if you have this uh at 50% or somewhere in between so we'll go over this a little bit later then when you go Full Throttle that bypass valve will stay partially open whatever percentage uh or or setting you have on the the trim pot here and this is supplied with the smooth boost the main issue here here is that if you dial it down then your power production throughout the entire RPM range every gear and all the way down the track or during your run will be down and and that's good if if that's what you intend what we normally want is maximum power when we've got traction um or or rather just maximum power for the traction that we have So the faster that you're going the higher the wheel speed is the more boost the the vehicle will take without in the tire so what we do is we take can inputs from the vehicle we just passively listen uh the inputs that we use are are pedal position engine RPM uh front and rear wheel speeds and then we can build boost ramps so as soon as you whack the throttle we can say bring the Boost in from a low level to full Boost from 20 to 60 M hour or we can go from a mid level to a high level or can just have it at fixed or or any variation the smooth boost is an incredible system because you can pulley your setup for maximum power all the time and then you can just trim um the Boost level that the surface will hook or that you want to run based on you know the ethanol content or the fuel that you have Etc so let's do a couple of polls on this car this is about a 975 wheel horsepower uh lt4 with a Maggie 2650 and the smooth boost system on it so we'll do a couple of polls and then we'll talk about kind of what we did and what we're seeing

so we did four different polls with the smooth boost controller and the factory supplied smooth boost knob so this allows for fixed boost levels below what your pulley setting is so if you had a 18 PSI pulley setting you can go anywhere from 18 down to nearly zero so this particular car does make about 18 pounds of boost again it's a Maggie 2650 and so here's the first poll with the full bypass so this is the bypass valve fully open so we go full throttle and here we're about 2369 RPM you can see on the bottom scale there then we get up through uh we're we're climbing an engine RPM again this is all Full Throttle and you'll see boost on the top graph is 08 PSI again this is bypass valve fully open so the absolute minimum boost that this setup can make so as we climb through you'll see that we get to a peak of about three and a half 3.6 PSI then we set it to 30% so there's a little indicators on the factory knob we set it to Knob level three so that's that so again here you'll see with the bypass valve fully open it was making 0.9 PSI here and with the bypass valve at 30% % or the knob set to three you're making about 1.8 PSI so you'll see how the different boost level is here so at setting three you're making five and a half PSI with the bypass valve fully open you're making three and a half PSI then we did 60% so 60% you can see a significant jump so it's not linear the Boost that you'll get by by knob position so you got to take that into account but I mean you'd know that really quickly by driving your car and checking data logs you you'd get an understanding of what um knob setting creates what boost level so again this is 0% here's 30% and here's 60% so to give you an example up here where we were making three and a half pounds of boost that made 489 horsepower where we made 5 and a half pounds of boost we made 556 horsepower and then where we made 14 pounds of boost we made 842 so obviously you could go anywhere in between but these are fixed uh bypass valve openings basically creating a fixed power level throughout the race in every gear and at every mile per hour you're either going to be you know down or up but it's fixed unless you wanted to reach over and try to turn the knob while you were driving which obviously doesn't make sense and then here is bypass valve fully closed so 100% as if you didn't have a smooth boost controller on the vehicle at all so you see here at 3100 we're making 13 pounds of boost and then up here we're making 18 and a half and that was 940 wheel horsepower on this pole so these are the different boost levels and knob settings like what knob setting will achieve what boost level and what power level so you can see it's it's really an awesome system because you can pulle it for the maximum power and then if you tuned it on race gas you could have it maxed out all the time and if you had it on pump gas or some you know porer fuel or you know uh street tires or something you could turn the Boost down and the really cool thing about this is this doesn't require tune changes so you just set the knob once it's tuned for maximum boost level and you're sure that you have the appropriate mods for the fuel system etc etc you can always turn it down without making any tune changes so that's a pretty neat thing the the real benefit here is when you're able to achieve this maximum boost level at the higher RPM or the higher vehicle speeds but you're able to ramp it in so that as soon as you hit the throttle let's say you were cruising at 40 mph so here we're 55 miles an hour as you can see by the uh middle graph here if you just whack the throttle right now and you were on setting here this red setting you'd be making one pound of boost and if you didn't have a smooth boost controller you be making 12 and a half so the difference is hundreds of foot pounds of torque so this is the difference between knocking the tires off and spinning or not so in another video we'll talk about how the Kaizen relay ramps this in so you get the best of both worlds you get Peak power where you want it and not too much power when you don't so stay tuned for that