markpa

Is anyone running this setup? Would anyone recommand against it or, could recoomand some slight mods (that wouldnt cost to much $$)that would strenghten it. And lastly how high could you rev the motor? Thanks in advance.

imported_Team Rukus

y would u do that?
to me it sounds like a downgrade.
i rather go wit the b18c top and b20 bottom.

markpa

I messed up the title anyways what i meant was , i wanna get a b20b bottom and slap a b16 head ontop and have b20vtec.

bbarbulo

iTrader: (2)

B16 head > B18 head

need lotsa $$$$

Can't rev high enough on stock internals to take adv of B16 head. Need to destroke it in which case it's better to bore out B18C block by Leitner.

markpa

thanks again bbarbulo for the quick reply.

Sassafrass

If you were to use the stock block and head, that would equal explosion in a short time.

Personally I wouldn't use a B20 block either, use a B18B, may not have as much displacement, but I've heard bad things about B20 blocks, if not reinforced properly.

imported_JookSingKid

recommend against it.

R0Y

u should get B20Z instead of B20B....

imported_gatherer

basically stock internals in a b20B were not made to have a vtec head on top of it (whether the head is stock or not) basically the valve reliefs on the pistons are not big enough so whenever you hit VTEC your going to bend valves .... not a good Idea now if yyou get the motor properly built a b16 head would be fine ... so long as both are built to be compatible thats what they used at www.theoldone.com

markpa

And would you happen to know how much $$$ it be to build the bottom up enough?

imported_gatherer

well you'd need new pistons... that have valve clearances .. then you'd need the asembly done ... not sure if that involves machining or not ....

ok thats the bottom end speak to Steve at Leitner performance...

and the top end starting with the combustion chambers you'd need those resized to the 84 mm bore of the block and you'd probably also want to get it P&P while your at it.... again speak to Steve for pricing ....

you might also need to destroke the engine (new crank and rods) if you want to keep a b16's high red high, however I'm not sure on this. you might also want to get the block posted while your at it so that it's stronger but still allows enough coolant to flow (unlike block guards) ... anyways thats a bit of work if you ask me. speak to steve for pricing.

markpa

Thanks for the info ill give steve a call on thrusday.

Jugglez

you don't destroke a b20 if you're building a frank. that would defeat the purpose.

Jugglez

it shouldn't matter which one if you're building a frank, the blocks are gonna be torn apart and everything replaced with high compression pistons anyways. the only difference between the Z and B is the piston type.

if you were to go with a straight B20 and keep the block stock , then the Z will be better of course.. (higher compression.. more power).

dingus8

haha thank you jugglles for actually not being a douche like other peopel who are keyboard racer/mechanics...you dont' destroke a b20...a completely stock setup woudl be able to rev 77-7800 max..the b20 block has slightly thinner cylinder walls so take that into consideration....this is not a set up that you jsut mickey mouse together, it is a very effective I guess you coudl say "hard edge" setup to build...a decent setup woudl be b20 block itr pistons gsr girdle shot peened ls rods is a must with vtec head of choice oh ya and oil squirters......I woudl say don't do this caus you abviously dotn' knwo much abotu it and arent' willign to build it right so in the end a stock b20vtec setup = Kaboom and wasted money...

I hate every 2 seconds soem dude bud here's about this setup liek you jsut put a vtec head on and yoru running 12's in you rusted out civic. Jsut get a gsr or b16 and be doen with it....

markpa

Yeah but some people like to be different thats why i was looking into this possibilty.

dingus8

fare enoguh but int his case beign different will cost lot's of money....and it really isnt' different at all....dude do a b20 without the vtec head jsut put some big cams i/h/e and a gsr tranny with alittle tunign and it woudl kick ***

h22a

hey guys, i hv some discussion here.
I read some magazine in HK, who they also built some b20vtec, what they use is a b20 block, bore out and fit in the f20(accord sir-t) piston and rod i think. thinner gasket......and so on

can some knowledged guy correct me if this is a stupid idea?

R0Y

I say just go with B20Z + turbo

donesixer

I like this setup.
If you want a cheap build, replace the rod bolts with some from ARP. It is usually the bolts that let go when you spin it.
Keep it below 7500 rpm, and it should be fairly reliable.
Definitely keep the B16 head.
I would get a B18B block, some Leitner 84mm (or bigger) sleeves, some rods, some pistons, and a buttload of headwork.
Will be a beauty engine...

Oh yeah, page 2 is mine...