Any way to add lost motion springs to K20A3/K24A1 head yet? - K20A.org .:. The K Series Source . Honda / Acura K20a k24a Engine Forum
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Old 01-10-2010, 07:36 PM   #1
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Question Any way to add lost motion springs to K20A3/K24A1 head yet?

Seems to be an abundance of "gay" VTEC heads out there now. I'm in possession of one of them (CRV head). They sell for next to nothing ATM so I'm wondering if there's a way to add some value to these heads.

I can see 2 methods. The weaker method is probably a "slip on" method that slides over the tubes leading to the spark plugs with arms coming out with a place for the lost motion spring.

The other method would be to drill 8 holes and press aluminum cylinderical slugs into them, then drill into these slugs a little for a place for the spring to sit. Is this possible without drilling into the ports or into where the spark plugs would sit? Would this affect the head's integrity? Would it be cheap to do this?

Does anyone know what angle the springs sit at? Is it the same angle the valves are?
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How to make your own charge harness: https://www.k20a.org/forum/showthread.php?t=37856 06+ Civic Si vs TSX shifter, cables and tranny: https://www.k20a.org/forum/showthread.php?t=38033 OEM wheel bearing dimensions: https://www.k20a.org/forum/showthread.php?t=37607
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Old 01-10-2010, 10:02 PM   #2
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

im sure it can be done. few alluminum sleeves the right diameter , good measurements and a good welder. but how much would it cost vs selling a couple of those heads and buying one that comes with them , lol.
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Old 01-10-2010, 10:08 PM   #3
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

Getting the sleeves aligned 100%,I dont see it unless CNC is used and a lot of work to get it right each time.. Just use a new rsx type s head :P
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Old 01-10-2010, 11:06 PM   #4
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

I'm broke.
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How to make your own charge harness: https://www.k20a.org/forum/showthread.php?t=37856 06+ Civic Si vs TSX shifter, cables and tranny: https://www.k20a.org/forum/showthread.php?t=38033 OEM wheel bearing dimensions: https://www.k20a.org/forum/showthread.php?t=37607
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Old 01-11-2010, 06:13 AM   #5
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

use the vtec killer route with the locked rockers
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Old 01-11-2010, 06:23 AM   #6
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

Quote:
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use the vtec killer route with the locked rockers
+ 1. It's cheap and has been proven to work just fine. I've been daily driving mine for almost 10k miles now.
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Old 01-11-2010, 07:21 AM   #7
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

Quote:
Originally Posted by nikos View Post
use the vtec killer route with the locked rockers
+2... I have a ported a1 head that im doing the vtec killer setup with.
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Old 01-12-2010, 06:31 AM   #8
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

I'll think I'm going to do the VTEC killer for a pure track car. Either got to find some 3 lobe rockers (or 1 lobe exhaust rockers) plus shaft for the intake side.

So, should the track car get the K24A1 (changed to 12.5:1 CR) block or K20Z3 (stock) short block? Which should the DD get? Leaning towards the K24 for the DD cuz I'll be driving it more.
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How to make your own charge harness: https://www.k20a.org/forum/showthread.php?t=37856 06+ Civic Si vs TSX shifter, cables and tranny: https://www.k20a.org/forum/showthread.php?t=38033 OEM wheel bearing dimensions: https://www.k20a.org/forum/showthread.php?t=37607
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Old 01-12-2010, 06:44 AM   #9
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

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Originally Posted by Scourge View Post
I'll think I'm going to do the VTEC killer for a pure track car. Either got to find some 3 lobe rockers (or 1 lobe exhaust rockers) plus shaft for the intake side.

So, should the track car get the K24A1 (changed to 12.5:1 CR) block or K20Z3 (stock) short block? Which should the DD get? Leaning towards the K24 for the DD cuz I'll be driving it more.
That extra torque from the 2.4 will be great for the track.
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Old 01-12-2010, 07:04 AM   #10
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Default Re: Any way to add lost motion springs to K20A3/K24A1 head yet?

https://k20a.org/forum/showthread.php?t=10907
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