Hi guys, im planning on a built i'll start this winter but i need a little help to have the best combo for my budget.

I plan to do the built in two step:

Step 1:
-f23a1 block/crank/rods
-k20a3 pistons (comp. bump to 11.45:1cr )
-f23a1 vtec head stock
-Short ram intake
-4-2-1 headers

Step 2:
-head swap for f22a6
-bisimoto lvl 2 cam regrind
-h23 intake manifold/trottle body
-acura rdx 410cc injectors
-4-2-1 headers + SRI
-2,25 in exhaust
-p06 ECU tuned + obd1 harness convertion

BUT i have a problem..
I'll run maybe a year with the step 1 setup.. but i dont have the money to tune it twice, so will i be able to run the k20a3 high comp. pistons with 94 octane gas in the stock block/head with the stock ECU?? Or i should just wait and do a complete stock rebuilt until i swap the head?

i just want to do do the swap once. so if i drop it in with stock f23 pistons, they will stay there so no k20's.. i just want to plan my built so i dont mess up everything!

Just need info on what's the best for my budget and my engine. Thanks!

 

You never mentioned what your budget is.

Aside from that, you will not be able to run 11.5:1 CR on the stock ECU. Better off to wait and do everything all at once and tune it.

 

yeah, forgot the part about my budjet lol i calculated everything (will cost me more for sure) and i think i could get aroud 200 horses off the hybrid by putting around 1,5 to 2 k in it.. and thanks for the info, so stock f23 until i finish the f22 head and swap it ( its a DD so it gotta work until then )

 

200whp from $2000 would be really stretching it.

Now depending on whether or not you go new or used with the K20A3 pistons you are looking at approx. $100 used + New rings $120, or new OEM with rings for $340.

Head swap - $150 +/-
H23 IM TB - $150 +/-
RDX Inj + clips - $200-$250
Cam regrind - $280
Chipped P06 - $100
OBD conversion harness - Min $75 (if you buy one of the $30 ones you are only looking for issues)
Tune - $300-$500
That's right around $1700 just for those add on parts.

What is this hybrid going into? Do you already have the F23 and proper mounts and transmission? You should also add in engine gaskets and seals on top of that. So you will be pushing it to get in under $2k. It can be done, however everything has to go 100% without a hitch. and I have yet to see anyone do one of these swaps where everything goes without a hitch. A little extra machine work here or a missing part there....

I think you should add an extra $1500 to your budget. If not more! I'm sure I forgot some parts or machining costs in there. Like fuel system and having the block honed, unless you plan on just dropping the pistons in as is.... Cutting corners will only lead to throwing reliability out the window.

 

Damn, just get a straight K20 lol

 

I've been slowly working on a similar build for a while now. I got the stock, low-mileage engine for free, but purchased an adapter kit to fit my civic transmission so they sort of cancel out. the only expense left is tuning at this point, but the total cost so far has been about $2500. However I've spent a good deal of time and effort finding the best deals, learning to do things myself, buying tools that allow me do do things myself... it's most pragmatic to plan for a budget of about $3500. this is enough to meet your goal and still have reliable, long-lasting results.

 

K&N filter: $40
BLOX 4" velocity stack: $35
AEM BB6 V2 SRI: $250
Maxbore 70mm>64mm H23vtec throttle body: $130
Skunk2 Pro series V2 H22 intake manifold: $380
Evolution Industries F2H adapter: $130
OEM RDX 410cc injectors: $220
K-tuned injector hats & pigtails: $40
AEM adjustable FPR set at 40psi: $120
balance shaft belt removed: $ free
PT3 (F22A) cylinder head milled .020" (bumps compression to 9.7:1): $50
Bisimoto level 2 regrind: $280
Bisimoto Pro valve springs: $220
Bisimoto billet aluminum rocker spacers: $210
Bisimoto cam gear: $140
NGK blue wires: $40
OEM Honda new Cap and Rotor button: $30
JDM F23A short block: $100
Bisimoto V2 4-1 header: $600
3" exhaust turn down: $50
valve adjustment .009"/.011": $ free
fully wrapped exhaust: $60
M2S4 trans
E85 fuel
-1º cam gear
40deg ambient temp vs the 61deg earlier

It makes 204whp with full 2.5" exhaust and 93oct gas. That's still only $3,125 by my count. Money well spent and its behind a h23 manual trans. From what I've seen a b or d series is good for 4-5% less power train loss and a cheap ebay 3" exhaust should be good for another 3-4whp.

 

How much did you spend on your engine management system and tuning? The OP is not doing that sort of stuff himself.

So for $3500 - $4k you can have yourself a 200WHP build. That is as long as you can find those engine parts as cheaply as he did.

 

Well hondata plus the ecu and installation and tuning is roughly $900. So yah, a little over
$4,000 is good for 204whp at the minimum. That reminds me, pm me about your cylinder head ghost, I have some questions.

 

i came close to 200 on a delta cam. no problems. got 8k miles out of mine before i took it apart to upgrade.

https://honda-tech.com/forums/hybrid-engine-swaps-18/f23-long-block-k20-pistons-delta-272-grind-3000109/

 

You also made it on E85, K20A2 pistons and a bseries trans. These cost quite a bit conidering the fuel lines and filter needs to be changed to e85 approved, an H2B kit and ripping appart a motor to rebuild with used pistons. Your plans now from what I've read is anall out all motor race car with 14:1's so the h2b and the e85 stuff were all completely worth it. But for someone wanting 200whp~ it can be done with:
3" intake: $30
Bored H22 TB: $110
H23 plenum F22A6 runner: $50
F22A6 head: $50
Bisimoto valve springs: $180
Bisimoto level 2 cam $270
Bisimoto cam gear: $140
Mill head .020": $50
F23A short block:$450 from jdmenginedepot.com
Tri-Y h22 header with flange mod from H23 stainless header: $600
RDX injectors with pigtails: $260
Chipped p06: $150
That's $2340 but it can be done cheaper if you're looking. We have a local pick-a-part and if you put a f22a6 head on a f23 block with f22a6 lower and h22 upper with s2000 throttle body you can get it for $150. That knocks $500 off it. Then you under $1900.

 

jdm92 didnt even mention the 'budget' setup that he put down 206/191 with ;]

"kswap.." HA!! Whats the F going in?

 

Or... Injector Nation IN400's or IN700's, both have dual-cone sprays like RDX (4-hole atomizer caps on IN400's, 16-hole for IN700's), come with adapters for no extra cost (wireless obd0 & obd1 or wired obd2), free shipping, and both are on sale for $60-85 less than the RDX injectors & adapters.

 

its the same setup with full 2.5" exhaust, a proper valve adjustment and on pump 93 octane.

to HiProfile,

the rdx's are also e85 compatible and have a more consistent and linear patter. the amount of holes and the dual cone may seem similar but at 90% duty cycle the rdx injectors are much more consistent which means more reliable power. reliable and consistent power is the name of the game in a dd aplication like mine. just a heads up to anyone who is riding the F-train im looking into some more budget friendly ways to build power from an f-series. 1mm over bore is roughly $80 most places, tsx pistons can be had for $300 with rings, new acl race rod/main bearings are $180 at most, head gasket is $120, porting an h23 manifold like this vvvvvvv should be $100


and the manifold should be around $35, one of these can be bought and modded for less than $600 (ive done it before vvvvvv).


a custom cam from web or ddtech or bisi can be had for $800, cam gear for $130, aftermarket valvesprings with new oem retainers/keepers can be had for around $350, $600 for P&P head, 70mm tb can be had for $120, injectors for $250, and hondata for $600. that coupled with $150 for a f23 block with an f22a6 head on it puts me at roughly a little over $3600 to build a 230-240whp f-series that will live 100,000miles+ unless something stupid happens, lol. i think that most people, if patient, can replicate this in 2yrs time. if you over shoot at 4k thats less than $42 a week to have 240whp n/a single slammer that can be daily driven on pump and provide usable power in a broad spectrum(if the proper camshaft is selected).

 

Question why run the hideous a3 pistons. Why not something alil smoother on the dome