1-?? psi gains with small pulleys at higher boost.
The idea behind the design is to reduce or eliminate the harsh inlet bend (180* here) and open up the inlet with larger opening. More air means the compressor has to do less work to achieve the same amount of boost. I've seen some pretty original homemade stuff. $250 up vs small$. :joy:
Heres my homemade powerpipe. My Vortech SQ kit was purchased in 2000 and came with a funky flex tubing that entered into the fender to hook up the Mass air meter. I kept having problems with this flex hose slipping off and I was worried that the fender may cut into it causing a unmetered air leak. The pipe is made from a 3.5" Mandral bent Exhaust Pipe. I cut the pipe in half and then cut the bend off of another so that I would have the angles I needed. The fittings for the Bypass hose and such is PVC. I drilled into the pipe then loaded the fittings up with heat resistent 2 ton epoxy. Then I forced the fittings into the pipe. After the fittings setup I dremeled the fittings smooth on the inside of the pipe for smooth air flow. I also added more expoxy to the inside and outside of the fittings to make sure that they were good and strong. I used Marine Exhaust silicone tubing to connect the pipes together. Much cheaper then buying those sleaves from vortech or whoever. I then shot the pipe in and out with primer and then some silver paint I had laying around.
Most pipes are 4", the hard part is finding the parts to mate different sizes..
If I had all the right parts it would take 5-10 min. to install. I have the 90mm MAF = 3.54 in. venturi opening, so that is the bottleneck. Every other pipe should be larger. There are gains by getting rid of sharp bends and dryer hose. Need to achive smooth surface and as large pipe that still fits.
Diesel Components Inc stocks all the materials for power pipes/high-flow MAF-to-TB pipes. They carry stock mandrel bent tubing (90's and 45's) up to 6" diameter, large diameter straight tubing, and polymer connectors (hump connectors, 45's and 90's).
Their phone numbers are 800-252-6625 or 952-890-2885. Their website is: www.dieselcomponentsinc.
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