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Discussion Starter #1
Well I finally got my k20a3 dynoed over the weekend and here are the results.



This is a before after comparison from the stock k20a3 cams vs. k20a2 cams.

I went with the k20a3 exhaust rocker set-up, i think i'm herd about it being used other places, i think* this might be one of the first times results have been posted from a a3. The rest of the engine is stock internally.

Here are some pictures of the rocker set-up...





I've actually been running this set up for a little over a month now (~1100miles) and have had no problems at all.

other comparison (Green=k20z1,e85,race header, 76mm exhaust ect. Red=My vtec killer k20a3)



I'm very happy with how this has turned out.
 

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very nice setup, cheap power.

I can only imagine with better cams and header...:up:

thanks for posting the results, now people can know some good insights regarding simple upgrade..
 

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Discussion Starter #12

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ok i run the k20a2 intake and exhaust cam with the k20a2 rocker arms modified to run vtec properly what is the difference betwwen my set up and yours is there any advantage of running it your way without the low cam
 

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thats good power for a sort of simle mod...will this have any effect on longevity?
 

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damn, after all the work i did to do an a1 headswap on my a3 block with skunk2 stage II cams and I only hit 180 with a PRC intake manifold, 3in intake, dcrh, and small 2.25in exhaust. I should have just done something like this with the a1 head. Maybe I will try porting my a3 head and trying this. So explain this, did you do any swapping order of the exhaust side rockers? Or is it just plain a2 cams on the exhaust side.
 

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man this thing was LOUD!!!
 

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u make less hp and tq below 4700rpm with this setup than your stock k20a3 that is why i use the k20a2 rocker arms modified for vtec so you run on the low cams till 4700 and then switch to the high cam to get a better powerband how ur idle do u have a vid
 
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