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New 4-pattern camshafts

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Old Dec 9, 2012 | 02:00 AM
  #21  
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I knew I'd been sent these details....

Winner of "Best New Street Performance Product" at SEMA, the all new COMP® 4-Pattern Camshafts are designed to optimize valve events based on runner length and feature a large increase in area under the curve and stability at high RPM.

NASCAR teams have been using camshafts designed this way for years, but this is the first ever use of technology in street vehicles to balance air/fuel ratio per cylinder.

4-Pattern Cams can net you 1000+ RPM over other hydraulic rollers and anywhere from 5-20+ horsepower peak to peak, depending on cylinder head flow.

4-Pattern Cams feature four different lobe patterns, with one intake and exhaust design for outboard runners, and another intake and exhaust design for the inboard runners.

While the four inboard cylinders are all the same grinds, the outboard exhaust openings are two degrees earlier, with outboard intake closings coming two degrees later.
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Old Dec 9, 2012 | 11:06 PM
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Originally Posted by cuisinartvette
Waiting on aftermarket heads to have direct injection bungs that should take care of any dist issue
Direct injection doesn't necessarily solve distribution issues, though a large plenum dry intake will have much better distribution than a carbed setup.

Originally Posted by gkull
Quality fuel injection uses individual sensor per cylinder. V-8 = 8 Then you use sequential injection that varies the pulse width for each cylinder
Yup. In order to achieve perfect cylinder balance, that's really the only way to go. Even if you solve air distribution, the question of fuel distribution comes in. The mathematical models of the ECM can only compensate for so much, and then experimental data (learning mode) kicks in and the sensors do the rest.

Would be quite awesome.

I don't think any of the modern factory DI cars are running individual lambda sensors - far too expensive for the gains they offer, not to mention you'd need something that would run close to the header and the risk of signal contamination is high in most factory systems, where the exhaust runner lengths are on the order of 4-7".
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