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Discussion Starter #1
Im new to k series and I am slowly selling off my K series stuff to build a frank block for my FG2. So my question is how do the DC stage 4s handle I'm trying to squeeze 300+ hp NA out of my Si. Ppl will tell me to go FI it's just not my thing. Is 300whp achievable with these cams+ bolt ons and tune? Thanks in advance.
 

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I'm not going to say 300 whp is impossible out of an 8th gen in naturally aspirated format... But the most likely way it will happen(read: no crazy race car RPMs) will include swapping a k24 bottom over, with a lot of other goodies.

Without a k24 bottom end/stroker... I'm not entirely confident you can get a NA k20 to 300 without some serious, serious modifications.
 

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I'm always up for a challenge I'm currently sourcing parts for a Frankenstein set up K20/K24 I was just hoping the DC4.5 cams might get me close to my goal with at least 12:5 CR thanks for the input guys.
 

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I'm always up for a challenge I'm currently sourcing parts for a Frankenstein set up K20/K24 I was just hoping the DC4.5 cams might get me close to my goal with at least 12:5 CR thanks for the input guys.
I've been building a k20a2/k24a2 for my 08 FA5, and my goal is 300+ whp while retaining all the luxuries of the car.

My head is a k20a2, I'll be getting the 4Piston 156v2 port and polish, with ferrea 6000 valves, supertech valvetrain, and dc4 cams.

My bottom end is a k24a2 donor, stock crank. Running Brian Crower Lightweight Sportman rods. Ceramic coated Wiseco 12.5:1 pistons. Ported RRC oil pump from Hytech, as well as his oil pan baffle.

Induction will be a custom intake tube, feeding into modified Lexus RC-F throttle body(84mm at the plate), a Hayward Performance centerfeed intake manifold. I'll have to do a tube support/hood latch to actually fit this beast.

Exhaust is a custom Hytech header, gave him all my engine specs and he designed it. From there it's going out a 3" Full Race exhaust... oh yeah, both are ceramic coated.

We'll see what I get when I get there! Slow going, military pay ain't that great when you're low on the totem pole.
 

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I've been building a k20a2/k24a2 for my 08 FA5, and my goal is 300+ whp while retaining all the luxuries of the car.

My head is a k20a2, I'll be getting the 4Piston 156v2 port and polish, with ferrea 6000 valves, supertech valvetrain, and dc4 cams.

My bottom end is a k24a2 donor, stock crank. Running Brian Crower Lightweight Sportman rods. Ceramic coated Wiseco 12.5:1 pistons. Ported RRC oil pump from Hytech, as well as his oil pan baffle.

Induction will be a custom intake tube, feeding into modified Lexus RC-F throttle body(84mm at the plate), a Hayward Performance centerfeed intake manifold. I'll have to do a tube support/hood latch to actually fit this beast.

Exhaust is a custom Hytech header, gave him all my engine specs and he designed it. From there it's going out a 3" Full Race exhaust... oh yeah, both are ceramic coated.

We'll see what I get when I get there! Slow going, military pay ain't that great when you're low on the totem pole.
i have a question, where in the world do you get a modified lexus RCF throttle body to work on a honda ECU?
 
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