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B20b engine swap

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Old 10-04-2009, 05:03 AM
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Default B20b engine swap

b16a it is lol...

i have a HUGE problem though.

My sisters car which has a D16z6 in it.. it FAILED our emissions test. I will Give you information:

No PPM= Limit: 0636....... Reading at 40km/hr: 2569 = FAIL

here are some of the common causes of why that area failed:

High HC (carbon monoxide) during Driving Test or High Idle Test:
- Vacuum Leaks
- Ignition System Malfunction
- Faulty computerized engine management system and/or oxygen sensors
- Faulty Air Injection System
- Internal Engine Problem
- Failed Catalytic Converter.

High NOx (nitrogen oxides) on Driving Test:
- Inoperative/ineffective exhaust gas recirculation (EGR system)
- Excessively lean air/fuel ratio
- Malfunctioning or missing catalytic converter (3-way catalyst only)
- Excessive spark advance
- Faulty Thermostatic Air Cleaner System

Last edited by Mike95Civic; 03-30-2010 at 10:39 AM. Reason: MAIN PROBLEM
Old 10-04-2009, 01:01 PM
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Default Re: B20b engine swap

definatly should have searched that one. For the swap your going from a sohc to dohc so yah your going to have to buy mounts, and depending on the year of the civic you mught need a adapter for your ecu
Old 10-04-2009, 01:02 PM
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Default Re: B20b engine swap

haha someone lied to you...b20 isnt even on the same level as a k swap!
Old 10-04-2009, 01:05 PM
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Default Re: B20b engine swap

Please search the FAQ's.
Old 10-06-2009, 09:24 AM
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Default Re: B20b engine swap

well i'd think the B20b is easier to swap in than a K-series?.. plus i wouldn't want my engine to be backwards lol, from the civics i've seen.
Old 10-06-2009, 11:42 AM
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Default Re: B20b engine swap

B20bs are 126hp and 133tq.... nowhere near a k-series swap lol.... you were lied to...

B16 swaps are popular, although they have low torque... An ls motor is pretty boss, even stock... You could go ls motor with a b16 tranny... or a ls with a b16 head to make a lsv... or if you really want a b20b, you can put a gsr head on it to make a b20v... it's all up to what you want, any of those setups are decent on power and somewhat popular... Do you want a stock dohc nonvtec, or stock dohc vtec, built dohc vtec.... turbo? what do you plan on doing?

Last edited by 00 civic si; 10-06-2009 at 11:55 AM.
Old 10-06-2009, 11:53 AM
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Default Re: B20b engine swap

Of course a B swap is easier than a K swap, its like legos and you can pull a engine out of an integra and put it into whatever with stock parts. K series maybe "backwards" but they sure are worth the power cause a backwards K will eat up a B series all day. If your gonna do a B20 swap at least but a vtec head on it so it wont be such a turd up in the upper RPMs. If your car is a 92-95 your car motor will drop right in with stock integra mounts, shift linkages, axles, wire harness, ecu, ect.. 96+ your gonna need 00 all the B series linkages and axles as well, but your gonna use the 99-00 SI mounts and wire harness and then depending if your keeping it obd2 an ECU to match the motor your running. Either way its a simple swap tho and you can use factory parts to achieve it.
Old 10-06-2009, 07:50 PM
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Default Re: B20b engine swap

i was thinking of doing just keeping whatever transmission thats in the car im getting, and dropping in the B20b engine, until i can find a good transmission.

I DO infact want it to be a B20b Vtec, so once again, i will drop it in, until i find a GSR vtec head, and put new timing belt, headgaskets ect, when i get the GSR head.

The car im planning on getting is the 92-95 hatchback civic. I won't be driving it right away, because of the work i have to do. Right now i'm rebuilding the cylinder heads on my Stealth R/T.

Once i'm done, which should be next week, i will put the stealth on the road, and drive that until the civic is done, which should be when it JUST starts to snow.
Old 10-06-2009, 07:52 PM
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Default Re: B20b engine swap

when i do the B20b swap, i know about the Motor/Tranny mounts.. but could i use the same wiring harness thats in the car already? and just swap the ECU's?

sorry, i am currently a DSM owner, so thats all i know lol.. I'm new to honda.
Old 10-06-2009, 08:20 PM
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Default Re: B20b engine swap

not sure about the harness, but you will need a new ecu.

and a new waterpump to do things right. the b20 block has a non-vtec waterpump, which has 19 teeth on the gear, the vtec waterpump has 22 teeth. this means non-vtec pump will just churn the coolant at high rpm (vtec) and it won't work. get a vtec waterpump.
Old 10-07-2009, 02:51 AM
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Default Re: B20b engine swap

When doing the B20 swap you need a B series wire harness, id personally get a GSR harness that way you have VTEC wired up already from factory and not have to worry about anything down the road when you do decide to put a GSR head on it. As far as the ECU goes your goin to need to get a non-VTEC B series ECU (P75) and once you get the vtec head on your gonna need a VTEC ECU (chipped P28, P30, P61, P72, or P73). When you do change the head over with the GSR make sure you put a VTEC oil pump on it. The water pump doesnt matter, I had a 19T water pump on mine cause I couldnt get any B series timing belts to fit with the 22T water pump. I NEVER had any cooling issues with my B20vtec running the 19T pump either and I was wrapping it to almost 9000rpm's.
Old 03-27-2010, 10:58 AM
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Default Re: B20b engine swap

im guessing you have to rip the whole dash out to remove the old harness lol (which isn't THAT hard)... just a lot of work..

funny thing is, that a couple months after we swapped my sisters D16z6 engine in, the MLS headgasket started to leak out oil.. and now the car is starting to chug sometimes, and feels like its running on 3 cylinders.
Old 03-27-2010, 11:11 AM
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Default Re: B20b engine swap

I'm pretty sure you can use the wiring harness in your car, your just going to need to splice some wires into the existing harness i think...
Old 03-27-2010, 11:17 AM
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Default Re: B20b engine swap

hmmm thats something im not good at yet lol.

a leaking headgasket would cause chugging, and make the car feel like its running on 3 cylinders, right?

It started as a little leak, but now theres oil underneath the tranny, and oil pan is covered in oil, and oil is dripping onto the downpipe lol.
Old 03-27-2010, 11:55 AM
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Default Re: B20b engine swap

the best choice for money/ power would be the b20 it has more torque then the ls, you can use integra motor mounts (the eg civic and dc integra have identical engine bays) but you'll need b series axles w half shaft, shift linkage, and most likely an ecu and wiring harness
Old 03-28-2010, 07:04 PM
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Default Re: B20b engine swap

a lot of good information.
Old 03-28-2010, 08:49 PM
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Default Re: B20b engine swap

B20B/Z are similar to LS motor but more TQ probably put more whp then b18bs
Old 03-29-2010, 01:16 AM
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Default Re: B20b engine swap

Originally Posted by Mike95Civic
i was thinking of doing just keeping whatever transmission thats in the car im getting, and dropping in the B20b engine, until i can find a good transmission.
Umm, if the car you're getting has a SOHC engine, you can't just swap in the B20 cuz thats a DOHC engine. You're going to need a B series transmission.
Old 03-29-2010, 05:08 AM
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Default Re: B20b engine swap

Originally Posted by Smash03
Umm, if the car you're getting has a SOHC engine, you can't just swap in the B20 cuz thats a DOHC engine. You're going to need a B series transmission.
You beat me to it. OP, this is correct. If your planning to just keep the D-Series tranny in there and bolt the B20 to it, your going to be very surprised when they DON'T bolt together. You need to read more..you have a lot to learn. We all had to learn, I found reading the best way.
Old 03-29-2010, 05:30 AM
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Default Re: B20b engine swap

When I did my B16 swap i used my stock SOHC wireharness plus an obd2-obd1 conv. harness and a p28 ecu if my memory serves me well...I then took it to a local shop were they spliced in the necesary wires for vtec and my TPS.
Old 03-29-2010, 05:46 AM
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Default Re: B20b engine swap

WOW all the false information thats in this thread!

b20b(usdm)126hp
b20z(usdm)146hp
b20b(96-98 jdm)126hp
b20b(98-01 jdm)146hp
b20b(p8r head) 142hp
all the above with **** load of tq in low rpms ranging from 131 to 134tq= a monster!

this swap with the help of bolt-ons will be a very pleasant to drive as a dd,actually much faster,reliable,cheaper and practicle then any other b series if you ask me.

the cheapest and easiest way to swap this is get a full ls swap and a b20b longblock(I would get a b20z though) and uttilize the intake manifold,exhaust manifold,dizzy,ecu of the ls(meaning just pass them onto the b20z) and just drop it in and your done. then sell the ls longblock heres the list

ls swap $750
with ecu,motor,tranny,mounts,shafts,dizzy,clutch,intake & exhaust manifold

b20z $500

sell the ls longblock $250

total=$1000 and you have a 2lt b-series with near 150hp and loads of tq not to mention much more potential for future mods too.
Old 03-29-2010, 12:32 PM
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Default Re: B20b engine swap

that to much work get the b20 with a b16 trans and ur good call it a day no need to buy two motors
Old 03-29-2010, 04:39 PM
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Default Re: B20b engine swap

i think the b20 and b16 trans will do.. im not lookin to go stupid fast here... i just want a civic with a little ***** under the hood
Old 03-29-2010, 06:18 PM
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Default Re: B20b engine swap

if your going vtec on that b20 your better off getting a b18b1 because a b20 on a vtec head wont let you rev as high since the vavles wouldn't have enough clearance and it will blow.. if you have a 92-95 civic then all you need is b series swap mounts and a b series shift linkage thats basically all you need for your swap i have a b18b1 in my eg civic and it only took me less than 3 hours to do the whole swap. besides if you get the b18b1 and put vtec on it the you do less conversion work on it compared to the b20 and save some money as well. but for that price look for a turbo for the b18 since its better for boost and the b20 block is thinner and easier to blow and the b20 head doesnt flow like a b18 head... just think about your budget and what power your trying to get out of your swap you can go to swapshopracing.com and you can find your conversion parts for your b series
Old 03-30-2010, 06:55 AM
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Default Re: B20b engine swap

dear god the miss leading full of crap in this thread keeps commin!

I ask the smart guy here,should the op buy a b20 engine and b16 tranny how much do you think he would spend?B20=500
B16 tranny=500
Total 1000= you have jackass to run as of yet!

are you sure he is in need of no other parts?
what about the ecu(NEEDS EITHER LS OR THE ORIGINAL TUNED)?The clutch(B series),the flywheel(B series)the dizzy(CAN USE STOCK BUT LS RUNS SMOOTHER),the mounts(B SERIES),the intake manifold(B20B WONT CLEAR LS) ever consider those parts?

one by one all the above have to be delt with and cannot be handled unless modified or changed=money unless you simply buy an ls swap which is easier,more reliable and cheaper so off with the BS!


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