01-17-2004, 06:31 AM
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Thread Killah
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Join Date: Feb 2001
Location: Greenville, SC
Posts: 5,835
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We are really only dohc - just 2 cams for each cylinder but 4 total due to the boxer layout
The iris varies the air intake into the runners before it hits the valves. (open/ closed to both sets of runners)
vvt/vtec (or whatever) varies the actual opening of the valves (lift/ duration)
I think it might be a stretch to call ours variable valve timing - since it is not varying the actual valve timing one bit. But it does do something and you can definitely feel it when it comes on.
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Matt
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2015 BRZ Limited 6MT
92 Ebony LS-L ECUtune Stage2av1, Z32 MAF, 370cc injectors, TomsSVX intake, BontragerWorks 22mm RSB #003, HID Hi and Lo beams, OT endlink and bushing mods, PWR Aluminum radiator, Harvey's QC shift kit, 2.5" flowmaster 80 exhaust, 17" Michelin Pilot Sport A/S, Poly sway bar bushings, Slotted Bradi rotors, AFBeefcake powdercoated calipers, 97 grill, and a huge set of air horns. 300,000 miles and counting
92 Ebony LS-L. ecutune stage1v4, motorsport 1pc pulley. Garage Queen - sold to Dad in upstate NY 155,000 miles
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89 DL 4x4 little red wagon - a.k.a. The immortal suby. 275k R.I.P.
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