K20A2 Valvetrain and spring rate question
01-09-2019, 07:53 AM
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K20A2 Valvetrain and spring rate question
I've been reasearching about Supertech products since I came across a valvetrain kit from the Supertech in JHPUSA (link below) and went on the internet to do some reasearch. Some say they are very good quality, but some say they aren't as good in quality as others say and I saw that some people mentioned Ferrea valves, most say that these are top quality and one can't go wrong with Ferrea products. Ferrea is more expensive but that doesn't really matter, rather pay for something with quality and lasting. What are your guys opinions? My block is being rebuilt at the moment and now I want to rebuild the head therefore these questions. I also have another question, spring rates. What spring rate should I choose for a engine that will have around 400whp. Will 80lbs be enough or will I have valve float in the higher rpm's?
01-09-2019, 08:27 AM
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Re: K20A2 Valvetrain and spring rate question
4Piston Racing sells PSI valve springs which are one of the top manufacturers of valve springs in the US. They are pricey but you'll never have to worry about valve float at high RPM or the springs fatiguing. I personally run their Indy Car Valve Springs in my daily driver K-swapped civic and after 5 years I have had zero issues. 4Piston has their Pro Stock valve springs listed on their website but they should still be able to offer their Indy Car Valve Springs if you call and ask.
4 Piston Racing PSI Pro Stock Valve Spring and Titanium Retainer Kit | 4 Piston Racing
4 Piston Racing PSI Pro Stock Valve Spring and Titanium Retainer Kit | 4 Piston Racing
We are proud to offer the highest quality, longest lasting valve springs for your K-Series and S2000 engine...Period. Valve control is one of the most important parts of making power and promoting long engine life. Too often springs are pushed beyond their functional limits and valves bounce out of control. We put these kits together after extensive testing and these are a must if you are racing competitvely, turning high rpm, and running large camshafts. You can spend the money now and have a good spring that maintains valve control and lasts several race seasons, or buy cheap now and replace them a couple times a year...along with the other damage caused by out of control valves. We can also machine the seats to fine tune a pressure setting to suit your specific setup.
4PR-SPR-1001K - Pro Stock Race Spring
We developed this single spring kit starting with a PSI Pro Stock single spring with Max Life Treatment and our own custom seat and retainer. This is a lightweight package with plenty of room to run large camshafts beyond .650 lift. 120lbs on the seat, 320lbs @ .600. Package comes with springs, spring seats, and titanium retainers. These have been proven year after year and have a VERY long service life, 20 times that of the cheaper alternatives on the market. Excellent protection against floating valves in the event of a missed gear. Max RPM 11,000+.
These springs have PROVEN 6-10hp gains in high rpm ranges over most springs available on the market. You will find these 4P valve springs in more than 80% of the top all motor and turbo class cars....even under the valve covers of our competition.
MADE WITH PRIDE IN THE USA!!
Fits K-Series and S2000
4PR-SPR-1001K - Pro Stock Race Spring
We developed this single spring kit starting with a PSI Pro Stock single spring with Max Life Treatment and our own custom seat and retainer. This is a lightweight package with plenty of room to run large camshafts beyond .650 lift. 120lbs on the seat, 320lbs @ .600. Package comes with springs, spring seats, and titanium retainers. These have been proven year after year and have a VERY long service life, 20 times that of the cheaper alternatives on the market. Excellent protection against floating valves in the event of a missed gear. Max RPM 11,000+.
These springs have PROVEN 6-10hp gains in high rpm ranges over most springs available on the market. You will find these 4P valve springs in more than 80% of the top all motor and turbo class cars....even under the valve covers of our competition.
MADE WITH PRIDE IN THE USA!!
Fits K-Series and S2000
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