Rydaddy

Does anyone have experience with a B20b/z block & CTR head swap? I am about to purchase a B20 longblock to begin my "Project Swap". I plan on staying N/A and using all stock internals (modified B20 pistons, B20 rods & crank, ctr head, etc...) Its gonna get dropped into an EK hatch. Anyone with this setup have some 1/4mi. times or dyno numbers? Thanks...

Vanilla4215

better get some better pistons

broke1

that really should be first on your list. get with halo he has (had) a nice gsr head for sale.

Plan B

b20's are hard to do right. And very expensive. I personally do not suggest it.

Rydaddy

From what i understand it isnt very expensive - actually rather cheap. B20 longblock goes for about $600-$800, $1000 for the b16b head, another $1000 for tranny, $1000 for other misc. stuff. As for difficult, its almost identical to an LS/VTEC swap, which is not very difficult. A b20b block with a 1G B16a, stock B20 pistons is getting 173whp and 130 lb/ft. of torque...thats damn good.
http://crx.honda-perf.org/articles/crvtec/crvtec.html


[Modified by Rydaddy, 6:57 AM 7/16/2002]

polymath

Hard to do right? Not really. Expensive? Only as much as you want it to be.

I would recommend ditching the stock slugs...

Mine baselined 189hp & 144lb/ft.


[Modified by Coyote2000cc, 6:59 AM 7/16/2002]

Halo

A note of advice, compared to the other B series the 20 has the thinnest cylinder walls, if you go oversize go 84.5, I went to 85mm and recently thought I cracked a cylinder wall, turned out to be a blown headgasket but I was really sweating it there for awhile

Looose_R

for all teh b20vtec haters BONE STOCK block, mild NA head

DOHCtorTHRUST

nice dyno numbers! im not to familiar with b20s but i am familiar with ls/vtec.... my friend is dropping his second one in tomorrow..... i have another friend that just bought a b20z w/gsr head..... for my project i just got my b16a head ported and polished with 3 angle valve job for my ls/vtec... and im waiting to get my ctr pistons......i will post the pics but i can figure out how to up load it!(flame away) i think ls/vtec is the best bang for your buck NA motor but b20 has crazy torque....... for more info you can check out http://www.clubsi.com NA forum

Rydaddy

Im performing the swap with a friend. B16 swaps are so played out. I looked at these originally, but the torque just isnt there. B20 has neck-snapping torgue from about 2000 rpms on up the power band.


[Modified by Rydaddy, 3:50 PM 7/16/2002]

vtecvoodoo

are we calling your motor "bone stock" again? lol

Don`t expect the same numbers by simply slapping a vtec head on.

Ryan


[Modified by vtecvoodoo, 3:53 PM 7/16/2002]

Jason kiDD

h22 ownz joo!! hehe

SiBirdie

b20 ownz j00 go b20bastard!! =P

Rydaddy

I am slapping either a b16b or a b18c5 head on the b20 block...new pistons will prolly be the only thing not made by Honda in my engine (except STP cam seals ) BTW, would CTR pistons/rods work in a b20 block?


[Modified by Rydaddy, 1:38 AM 7/17/2002]

DOHCtorTHRUST

how much are you getting the b16b/b18c5 head for? if its a good deal go for it, but if it cost 1500 and up you should buy a b16a head and get it ported........thats my opion..... good luck

itr/ctr rods will not work.... the stroke is diff..... if it works in the b20, whats the use of getting b20?


[Modified by DOHCtorTHRUST, 9:25 AM 7/17/2002]

Rydaddy

Torque

polymath

Uuuhhh...are you sure about that?

Remember the B20 uses a totally different cylinder liner design than any of the other B-series. Its also siamesed unlike any of the other B-series. When I was trading my bare B18c for my B20 and compared them side-by-side, the cylinder walls looked hella thicker on the B20. And i got several comments to the fact from several other Honda hotroders while tearing it down...

Ya@inlinePRO

its the same as an LS motor? is the b series into an ek hard? and actually the b20 setup is one of the cheapest out of all the b series. am i correct?

Looose_R

82mm pistons wont work in an 84mm cylinder
b16 slugs and ctr slugs wont work!

Rydaddy

Are you implying that I get a piece of **** domestic? Or are you refering to another import? If you would look at my response in the context of this thread, i chose the B20 because it has the most torque out of all the B-series motors. Go back to school and take Critical Thinking before you make yourself look like a bigger dumbass.
www. HONDA-tech.com


[Modified by Rydaddy, 4:59 AM 7/18/2002]

NA EJ1

youll only get the torque if you use the B20 rods...CTR pistons will give you the most compression gains, B16 pistons run a close 2nd...get the Z10 girdle also...for an extra $300, itll save you a lot of headaches

rainmanEK

rudy has point! dont be so ignorent! excpet fact that although hondas are nice, they arnt " all that" eric

SiBirdie

b20vtec is the best of both worlds , YOu get the most torque ever on a B series.. and you have vtec which also make top end power with some head work.
I dont know but I love my b20vtec because I dont need to downshift to pass anyone in the hwy just give it a little gas =P

Rydaddy

I hear you brother. I dig hondas, and Im guessing everyone else here does too. From all the information that i have been able to come across, CRVTEC has consistantly been referred to as THE choice swap. More torque than any other B-series, no weight distribution problems like with the H22 - basically the IDEAL daily driver - with a rather cheap price tag. If you can name a better swap for a daily driven honda civic, do it and back it up.

C1V1C

WTF? B20 block is 84mm bore, CTR is 81mm.

B20/VTEC
check out this one, has ITB's too: