Winter Project - Intake Valve Upgrade - ZR-1 Net Registry Forums

Jagdpanzer · 02-05-2016

Working the heads over this winter installing a larger intake valve package I work out with Ferrea. Stock 39 mm intakes valves, seats, and springs to be replaced with 41.8mm stainless steel valves, springs and titanium retainers.Though 16% larger in area the Ferrea valve, locks and retainer weigh 8 grams less than the stock pieces. This setup is designed to work with a set 0.500" lift cams being made. Right now I plan to leave the stock exhaust valve setup more or less as is.

new valves in mock-up head

02-05-2016	#1
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,662	Winter Project - Intake Valve Upgrade Working the heads over this winter installing a larger intake valve package I work out with Ferrea. Stock 39 mm intakes valves, seats, and springs to be replaced with 41.8mm stainless steel valves, springs and titanium retainers.Though 16% larger in area the Ferrea valve, locks and retainer weigh 8 grams less than the stock pieces. This setup is designed to work with a set 0.500" lift cams being made. Right now I plan to leave the stock exhaust valve setup more or less as is. new valves in mock-up head __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake Last edited by Jagdpanzer; 02-05-2016 at 10:35 PM.