Turbo Head Builder Options
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Joined: Jun 2018
Posts: 813
Likes: 66
valve failure is pretty rare and when it does happen its always on the exhaust side. I personally run super tech .5mm oversized super tech inconel exhast valves, bronze valve guides, super tech titanium retainers and duel springs all with stock oem intake valves. Valve job and work done by tom at port flow.
Thread Starter
Joined: Jun 2018
Posts: 813
Likes: 66
It seems all shops that port and polish the head can obviously get both exhaust and intake side to flow more cfm but they also claim to be able to get exhaust side cfm to flow even more than the intake side. Even though from the factory intake valves are already bigger than exhaust valves it comes i wonder how this size difference should change as the exhaust port is made to flow even more than intake port?
Last edited by F1TwoThousand; Nov 30, 2018 at 10:18 PM.
Joined: Apr 2006
Posts: 566
Likes: 29
From: Fort Myers, FL
Looks like im going to be the guinea pig, I went with 4Piston Racing. Port and Polish head, Manganese Bronze valve guides, Ferrea S101000 spring kit, Ferrea Retainers, Ferrea competition plus oem size super alloy valves, and cnc open the combustiom chamber. Will post up the flowchart when i get it back.
Joined: Aug 2016
Posts: 1,154
Likes: 183
From: US129 Maryville, TN
Avoid the wait and have an extra cylinder head for about the same cost.
I'm selling my brand new 4piston head here: https://www.s2ki.com/forums/member-s.../#post24539172
I'm selling my brand new 4piston head here: https://www.s2ki.com/forums/member-s.../#post24539172
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