B20v_ek plans a B20VTEC build. Details inside
I am currently building a B20v for my ek here’s my plans
gsr head skunk 2 valve spring and retainers skunk 2 pro 3 cams skunk 2 ultra high comp valves skunk 2 ultra intake manifold stock port b20b block css bored to 85 wiseco 12.5:1 pistons eagle rods golden eagle conversion kit on 93 pump gas plan on it being a summer daily let me know what y’all think |
re: B20v_ek plans a B20VTEC build. Details inside
Originally Posted by B20v_ek
(Post 51907718)
I am currently building a B20v for my ek here’s my plans
gsr head skunk 2 valve spring and retainers skunk 2 pro 3 cams skunk 2 ultra high comp valves skunk 2 ultra intake manifold stock port b20b block css bored to 85 wiseco 12.5:1 pistons eagle rods golden eagle conversion kit on 93 pump gas plan on it being a summer daily let me know what y’all think |
re: B20v_ek plans a B20VTEC build. Details inside
Flat valves with 12.5:1 static CR pistons will yield around 12.7:1 compression. I'd recommend Pro 2 cams over Pro 3 for anything under 13:1 (and I wouldn't recommend anything over the 12.5 region for pump gas, you'd need to retard timing too much any any gains would be lost in the mapping).
Don't bore the B20 out to 85mm. The cylinder walls will be paper thin at that point, and you will have NO room for error. The cylinder wall between #2 and #3 is known to be problematic anyway on the B20, don't push your luck like that - an 85mm bore as opposed to an 84 -> 84.5mm bore also yields hardly any difference in overall displacement, it very simply isn't worth it. Bare in mind as well that the CSS process can't do anything about that 2/3 weak spot in the B20 either, Jeff used to mention this specifically on his website. http://performancetrends.com/Calcula...splacement.php Everything else looks good. TL;DR - Use Pro2 cams and stay with an 84 -> 84.5mm bore. |
re: B20v_ek plans a B20VTEC build. Details inside
I recommend Ferrea Competition Plus (or similar, high quality aftermarket valves) or just new OE valves instead of those cheap flat faces. "High-comp" is just marketing, more important is durability and weight because those are moving components. Any reduction in active valvetrain mass means less stress and need of valvespring tension. Stability in higher velocities.
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Re: B20v_ek plans a B20VTEC build. Details inside
I would go 84.5, 11-8-1 comp pistons, pro2 cams for 93 octane
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Re: B20v_ek plans a B20VTEC build. Details inside
first off you would need to talk to your tuner about your build and see what he recommends as far as compression range. higher is not always better as depending on your quality of fuel and temperature ranges in region you are in. higher temps, higher comp = pinging. mid to high 11 ratio is fine for daily and safe for a daily without much worry. I would go with this guy ^^^ for this build as it should be a "simple build" but we all know its never simple
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