B-series Mild NA Buildup

Builds
1

I got a GSR Longblock as part of a trade for my old built long block and stuff. OBD1, supposedly 70k on it. I was almost going to just throw it in my EK Hatch (CX w/ AC WOOT), which is currently powered by a 188,000 mile D16Y7 (burns no oil, still going strong!), but then I broke down. I really really didn’t want to get sucked into too much of a money pit with this but ah well, at least I didn’t go buy a turbo right?

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1000633.jpg

The idea is to build a stock-ish replacement motor for the EK. I even bought a CRV Air conditioning bracket so I can use the D-series AC Compressor on the B-series motor w/o having to rebend the AC lines for a B-series compressor haha. I still have my Quaife LSD so I’m looking for a B16 trans (WTB Btw) to throw it in so I can have an ITR (gearing)spec tranny for the setup.

Since the EK is 96-00, mine being 96 specifically, so OBD2a, I have to keep in mind I have to pass OBD2 inspection. So I’m using a 96-98 EX 5speed harness, and replacing plugs with the OBD1 plugs from the GSR harness that came w/ the motor, and I’m lengthening certain wires (O2 sensor) and bypassing other shit (CFK sensor on the oil pump—read the bypass here: http://ff-squad.com/wp/?p=309 ) as well as all this other bullshit crap I’m prolly going to take forever to get around to doing.

I was going to just use a GSR obd2a ECU, but then this longblock has a skunk2 mani so I didn’t want any bullshit going on with possible IAB compatibility bullshit issues, so I waited around and snagged a super rare 97 ITR ECU…obd2a. the 98 is also obd2a, but it apparently throws a code for some bullshit emissions crap that’s not on the civic, so good luck with that. JDM OBD2 ECU’s are the same as US OBD2 PLUG-WISE, but are basically OBD1 internally, so don’t bother trying to pass inspection with a JDM OBD2 ecu.

So, since I already bought an ITR ECU, why not get ITR cams? And since I’m getting the cams, I need to upgrade the valvetrain, as the GSR isn’t good past 8k rpm, nor can it really handle the extra lift of the ITR cams. I actually got CTR cams, which are the same as 00-01 ITR…different than 97-98 by 3 degrees of intake duration (243 vs 240 whoopee, every lil bit helps I suppose, esp. with shitty NA setups).

And since I’m pulling the head and sending it to CC Cylinder heads to get a resurface, 3 angle valvejob, and do a very minor port job (basic street package), might as well rebuild the bottom end!

So I got 82mm (1mm overbore) PR3 (b16) pistons, for a calculated compression of 11.58:1 and a displacement of 1842cc’s vs. 10:1 and 1797cc’s stock. Found some ITR rods for a good deal along with the ITR valve springs and cams, so I’m throwing those in as well.

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010168.jpg
http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010169.jpg

I’m a bit cautious about running a stock ITR ECU for this motor, but I figure if it runs like shit, I can always do an OBD2-1 conversion harness and run any of the obd1 ems programs for Hondas, and just plug in the ECU for inspection days. However, US ITR is 10.6:1 with the same cams, so I’m only off by 1 compression point…not too bad. Throw in the fact JDM ITR motors are 11:1 and u gotta figure the timing maps aren’t that different at all. With the extra 1mm bore, I figure it works to cancel out some of the effects of the 11.6:1 compression ratio. Lastly add in the fact that factory ECU’s run super duper rich and really pussy timing, I figure this motor will me A-OK running on the ITR ECU…if it pings, I’ll knock it back a few degrees at the distributor :lol:
(Disclaimer: I’m super lazy, and used to tune B-series motors all the time, so I sorta know what I’m doing. If you blow your shit up cuz you saw me say it, tough lol)

eventually I’ll want to get it running on OBD1 so I can tune it…check out this graph of a I/H/E 98 ITR motor stock vs tuned on OBD1 lol:

http://dynos.evans-tuning.com/stockvstuned.jpg

Pistons look ok. Soon to be paperweights.

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010148.jpg

Tore the head off, looks ok so far. Valves have a fair amount of carbon encrustation, but I’m sending the head out so the guy can clean it for me :lol:

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010149.jpg

Still gotta tear the block down, but I need to find a crank pulley holder thing, so I’m holding off on that for a bit. I’ll post the tear down when I get around to it. Still to come, the build up, the swap, the dyno, and maybe I’ll tune it to see how much more I can get out of it.

My splurge of the build was the Toda Header. So so leet. I just couldn’t not buy it for what it was listed for (650 shipped new!!!).

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010171.jpg
http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010170.jpg

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010172.jpg

2

Very nice man, If you need any help or info on swapping b series into an ek lmk.( I know you know your honda shit lol, but I dont think ive ever heard of you messing with ek’s) Ive been thru hell and back with mine and know all the details, bumps in the road to avoid.

good luck, that should be fun when its finished.:tup:

3

cool thanks :slight_smile: yeah its my first EK

I know the wiring is gay, but I have the obd1 harness for this motor + a 96-98 ex harness so hopefully I can get everything done before the motor is in the engine bay…get all the wire lengths right and all that shit.

I think the guys broke the knock sensor pulling the motor, so I gotta see if I can bypass it or if I need to get a new gay sensor.

Question on the mounts, I know the rear mount and tranny mount I can re-use from any B-series…but what about the rear Tbracket? I’ve heard use a Del Sol VTEC Bracket, I’ve also heard Si, and I’ve also heard any B-series T-bracket fits but I doubt that cuz I know there’s minor differences…

anything else super gay I’m not aware of?

4

First and more importantly ,You will need the rear t bracket from a 99 civic si ( not all b series are the same so get an si one). The left tranny mount you can re use from your civic.Youll be able to re use you drivers side stock motor mount, but you will need to order from a honda dealer ship, a 99 civic si block mount bracket( sits on block by timing belt and attches to motor mount).

Youll have to lengthen the primary o2 sensor, oil pressure sensor, knock sensor, and the crank position sensor you will need to mess with as well.

It might be hard for you to do that because your harness is obd1, im not too sure. Mine was obd2 so i had to cut the crank sensor off my civic harness and cut the one off the integra harness and wire that one in.

But yes def get your harness and sensors in place before you drop that motor in , I made the mistake of not doing that and it sucked lol.

For the fuel purge sensor on top of the intake manifold youll have to wire and lengthen that as well, I dont know if the connector is on the stock civic harness (I dont think soo, I forgot exactly what I did for that ill have to look in the morning)

Basically as long as you get the two mounts from a civic si( I highly recommend hitting up ray laks or another honda stealership for that) because those mounts are not very common, and have a whole harness from a teg with you, you should be pretty much set to go.

I see you found out how to retain the ac, but if youd like to retain power steering as well youll need a b series power steering line because the metal fitting on the d series line will not fit inside a b series pump.( do this before the motor goes in as well because I didnt lol)

5

OK cool thanks for the mount clarification.

Yeah wiring sucks. I have a spare OBD2 civic vtec harness. I just gotta change a few plugs (obd1 alternator, etc). Mostly just lengthening or shortening wires.

Head all wrapped up and ready to get cut uppppp. Gotta find a big enough box to fit this…

http://img.photobucket.com/albums/v320/todaparty/EK%20Civic/P1010153.jpg

6

:tup: no prob, theres a shit load of incorrect information about this specific swap on honda-tech and other honda oriented sites, as I found out the hard way. If you need anymore info or have any questions feel free to ask me man. Im prob the most recent person on this forum to b series swap an ek, so everything’s still pretty much fresh in my mind.

7

Oh yea and id label your injectors and dont mix them up lol, it took me hours to find the correct order of them when mine got switched. You may want to lengthen them, mine are kinda short and fit snug but aren’t too bad.

8

Ahh I see your edit.

Lucky for me I have a CX, so no PS…only AC and Alternator belts and im good to go :smiley:

9

swap is easy man, good luck with it, nothing wrong with a nice little n/a build for a daily

btw i dont think that’s a stock ecu controlling the car or the vtec would be at 5600 not 6400, although we all know gains from a tune can be great, what exhaust do you plan on running?

10

Another sign that the world is coming to an end…Toda builds an NA Honda LOL.

11

“might-as-well’s” can get expensive. lol

Looks good. Retaining A/C is always a plus!

12

:rofl: that one made me lol. i kind of want to do something mild with my EK too :stuck_out_tongue:

13

im doing almost the same build in my ek hb

14

yeah ur right, i dunno, maybe the guy was running a vafc…not sure why vtec was so high haha, but yeah u got the point…altho im not sure if I feel like dropping 300+dynotime for like 20-30 whp over 2k rpm basically haha…we’ll see.

exhaust i’m either gonna just make a 2.5 custom, or use parts of my 3" from my old turbo setup…I don’t want it to be too loud tho, so we’ll see again haha.

its sort of a do things as I go type of thing…no real parts list laid out other than the shit I listed.

once stuff starts breaking, then i’ll use the “might as well…since its broken / since its out of the engine bay” rationalization to get other goodies lol

15

This build sucks. No boost wtf :tdown:

16

:cry:

17

if you do want a “chip” for an obd1 ecu john kerr of j-k-tuning.com has a chip that my friends 97 spec itr with i/h/e put down 184whp

i see no reason you shouldn’t be around that power

18

word i’ll remember that, i’ll prolly just tune it myself. I’m sure vtec is super rich and the ign can be jacked up like 4 degrees across the board haha.

I work part time for Xenocron tuning now so I have dyno access. Woot!

19

i kinda like this build, keepin it simple n clean. nothing rele over the top, n i bet it will be a blast to drive when its done :tup:

20

You sound like a noob when it comes to EK’s, lol, and I know your good with hondas so it should come out nice. Looks like a fun build.