Sometimes I scare myself with the things I do. The head work was done simply because it was sitting next to me on a TV tray, and I was bored because the valves hand't arrived. I have to keep busy!Hopefully some day when my car is finished I'll stand a better chance on the Prelude of the month contest. I was nominated last month, but I would feel like a fraud if I had of won before the car was finished.
My initial plan was to take the valves out of my existing H22A4 head and swap them over to the Type-S. I thought better of it when I considered those valves have been mated to those seats now since at least October '98, and have been in service for 200000kms. I don't have any question about their longevity, but rather their ability to seal in different seats, in a completely different head. OEM valves are rather expensive from the dealer, and since I am on a limited budget, I decided, after reading just about every review I could find, on Ferrea.K30DPC wrote:Are those valves any better over OEM ones? and why not 6000 series? And one more. Is it standard size or +1mm?
From Ferrea's site:
"5000 Series Hi Performance Valves
The 5000 Series Hi Performance Valves have become the alternative for performance engine builders that use our competitors “street” or “performance valve”. These valves are machined in our CNC centers allowing tight tolerances and cost effective design.
They feature a one-piece forging made from stainless steel, a special heat treatment process, hard chrome stems, and hard tip. Most applications are available in an undercut stem and dished head, while other applications are available in straight stem and flat head."
"6000 Series Competition Valves
The 6000 Series Competition Valves are designed to provide excellent reliability in an environment of high spring pressures and roller cams, at a budget price. They have higher fatigue resistance and tensile strengths than our competitor’s best offerings.
To manufacture the valves we use our exclusive two-step slow forging process using EV8 stainless steel on both intake and exhaust valves.We provide a special heat-treatment and stress relieving process, along with hard chrome stems and friction-welded hard tips. We finish with a swirl polished head. The valves feature flow improvements to deliver the power needed for today’s sophisticated racing engines."
My plans for this car are OEM+, with as much horsepower as Honda intended them to have. I'll be happy with 220hp with stock or stockish parts. If I get a little more than that I'm happy. I don't plan on racing this car, or driving it hard, or een driving it on a daily basis. That being said, after reading Ferrea's literature, I felt the 5000 series would be sufficient for my plans. The 6000 to me seemed to be a bit of overkill.
I made a silly mistake when I picked the valves up. I didn't open all 16 boxes and check them all. As a result, I found two exhaust valves that are defective. Now I have to go back to the store and have them exchanged.
I went with the standard sizes for my valves.
