The most common kits on the market are the CT engineering “roots” style kit that gives instant response, and the Kraftwerks “centrifugal” style Rotrex kit that builds maximum power/boost towards redline. Supercharging is the most reliable route, but wont produce maximum horsepower.
ETUNES SUPPLIES SERIES
There are numerous ways to go about forced induction on a k series engine. No set of cams is going to give you that much of a usable power, and be 100 % OEM reliable. So you'll have a broader more usable power band, typically torque is 180-200 ft/lbs, and typical horsepower is 240-250, if everything else remains the same. If you don't change anything else (keeping the same intake, intake manifold, header, exhaust), we have seen 30-40 horsepower and torque gains.
ETUNES SUPPLIES UPGRADE
If you want to see big increase in horsepower and torque gain, without going forced induction, we recommend a TSX bottom end upgrade (assuming you are a K20 engine).
We have found that once you drop in a non-OEM cam in a K-series engine, you open up a can of worms for unreliability. The timing chain tensioner is unfortunately one of the pitfalls of the K-series motors. Any aftermarket cam in the k series engine has the potential for increased timing chain tensioner failure to occur. We have found that the 06+ TSX cams to be 100% OEM reliable and drop in (no valve train change needed), and give 5-10 ft-lb torque and 5-10 whp increase in power. On a stock engine doing a drop in aftermarket cam, you’ll see approximately 10-15 horsepower. Whats Next After Bolt On Modifications?Ī drop in camshaft is next after bolt on parts. I’ve actually seen better overall power band with the stock intake manifold, if you don't plan on switch over to the 50 degree VTC gear found on the K20/a2/z3 engines. If you have a TSX (K24A2 motor) doing an RBC intake manifold on that engine will lose a lot of midrange torque if you’re keeping the 25 degree variable timing gear in place. The best bang for the buck modifications on a naturally aspirated k series are RBC intake manifold, 3 inch cold air intake, race header, and 3 inch exhaust.
7 Things You Should Know Before Tuning Your Honda K series 1.
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