youtube videos latest cam for chevy 350 and still have good vacuum

There's even a $100 upgrade kit for existing 550hp models, so there's no need to spring for a whole new 1,100hp pump if your power needs keep climbing. This is plenty for Hicks' engine, but an 1,100hp version is also available (that one does need a regulator). It features big NPT side inlet and bottom outlets, a small NPT bottom port for a vapor return or fuel pressure-gauge line, and a 180-degree-rotatable valve body. It supports up to 550 hp at 7 psi without a regulator. It has an interesting line of unique problem-solvers, including the only currently available true high-output Cleveland mechanical fuel pumps (right). Clevelands used to be popular in carbureted oval-track racing back before the SVO hybrid blocks, and that's why niche specialists like RobbMc exist. Throttle response is noticeably crisper, and we don't feel like we have to floor it as often to get where we are going.We also needed to make sure any mechanical fuel pump could keep up with the engine's 450hp-plus projected power output, with ample overhead for the usual 'mission creep.' The problem is the big names don't make (at least not anymore) a truly high-volume Cleveland mechanical fuel pump. The truck is more fun to drive and much quicker. That is when you start to lose a substancial amount of necessary engine vaccum. The magic figure is around 230 degrees duration at.

Now the transmission feels like an actual four-speed. Jaybird, YES that is too much cam without using either an additional vaccum can or an electric vacuum pump. We noticed an immediate improvement in on-road drivability. Our truck rolls on 37-inch tires and weighs 5,400 pounds. Our engine is backed with a stock 4L60E four-speed automatic and 5.29 axle gears. But what is more impressive is the incredibly flat torque curve that hovers around 280 lb-ft all the way up to 5,000 rpm, which makes this a great engine for towing, dirt abuse, and daily driving. The cam swap bumped us up to 245 hp, and with the computer tuning, we hit 268 hp. That 20 percent reduction would have put our stock 255hp 5.7L at around 200 hp at the rear wheels.

For our application, 20 percent is a bit conservative given the Ford 9-inch rear, tight gearing, and bigger tires, but that's what we'll go with to be conservative. However, you can generally figure on about a 20 percent loss of power through the drivetrain. Unfortunately, we were unable to get a baseline on the dyno before the cam swap.

Youtube videos latest cam for chevy 350 and still have good vacuum