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K-Series Frankenstein?

Old 11-04-2018, 01:06 AM
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Default K-Series Frankenstein?

So I'm on the debate, and I need input on the idea of it. Since I have the K20A3, I wanted to swap out the block with a K24A and I was wondering if I should keep the head from the A3 or if I should just dump the whole thing after I pick up a different head? I originally wasn't gonna go with it, but the idea sounds very appealing. I had originally planned and sticking with the whole A3 and swapping out to Brian Crower Stage 2 Cams and forged pistons and eagle rods then boost. Still unsure what brand on that. Any input would be nice. Please and thank you!

Also, this is my first build so in the process of trial and error with everything you could say. Do I also have to change my harness? And how would I remap my K-Pro?
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Old 11-04-2018, 09:13 AM
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Default Re: K-Series Frankenstein?

Dump the whole thing. The A3 has no true vtec on the exhaust lobe. You'd either need to get crazy cams that mimic vtec or just a new head from something like an RSX-S, TSX, 06+ Si... The head vs the cams are about the same price honestly, and the upgraded head will have more future potential. I am personally building a JDM K24A block with a 09 Si K20Z3 head, aiming for 250 hp NA. The only harness changes would be to accomodate different sensors (I think my JDM block uses a different crank sensor) and yes, you will need a new kpro map, but I don't know enough to weigh in on that other than look for a preset that's close to what you build.
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Old 11-05-2018, 04:44 AM
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Default Re: K-Series Frankenstein?

You can download a base map remotely with laptop and wifi. But what you should really do is get it professionally tuned soon afterwards.
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Old 11-05-2018, 01:23 PM
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Default Re: K-Series Frankenstein?

Where online could I find one?
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Old 11-06-2018, 12:16 PM
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Default Re: K-Series Frankenstein?

Also, was doing some more research, instead of going with the K24 block, what if I was to keep the A3 block and swap the head with either an A2 or the Z3? Trying to get the best performance on a budget is my goal.
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Old 11-06-2018, 12:29 PM
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Default Re: K-Series Frankenstein?

A3 block is low performance, low compression, not as well ballanced... I rarely see any A2 heads on an A3 block exceed 190 hp, the compression just isn't there
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Old 11-06-2018, 12:49 PM
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Default Re: K-Series Frankenstein?

Frankensteins don't really make sense for our cars, imho. For dowloading maps, you'd have to deal with Hondata directly; I don't know of any available map databases outside of their pool, though I'm sure they exist.
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Old 11-10-2018, 06:45 PM
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Default Re: K-Series Frankenstein?

Ohkay. So a co-worker of mine was able to give me some more info about getting a new map for my K-Pro. But another question popped up, so I've decided, I'm gonna be dumping my A3 and planning on pulling out a Z3 from an 06 Si, it does need a full overhaul since it was a blown head gasket (got it for CHEAP) with no Trans. The question is, would I be able to swap it over and put it in with my 5-Speed Trans? I doubt it but it's something that popped into my mind. If not, would I be able to use a Trans off an A2?
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Old 11-10-2018, 09:36 PM
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Default Re: K-Series Frankenstein?

Either the A3 or a2 trans will work fine.
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Old 11-11-2018, 09:48 AM
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Default Re: K-Series Frankenstein?

Manual K series transmissions from the civics up to '12 and the RSXs are all basically the same case, if not the internals can be moved over to a compatible case.

The 6th gear and LSD is worth it, try to get one if you can
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Old 11-11-2018, 10:01 AM
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Default Re: K-Series Frankenstein?

Originally Posted by tommycrx View Post
Frankensteins don't really make sense for our cars, imho. For dowloading maps, you'd have to deal with Hondata directly; I don't know of any available map databases outside of their pool, though I'm sure they exist.
K20 heads like the A2, Z1, Z3s tend to flow better than their K24 counterparts because the engines are expected to rev higher. K24s, having a larger displacement which generate more torque. So I wouldn't say a frank build is pointless. A well build K24 from the TSX or sport accord with true vtec and a head porting would perform just as well, though
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