B20/vtec?

[95CIVICex]

I was wondering anyone who's owned a B20/VTEC or knows someone who's had one for a while thinks about this setup and how reliable it actually is in the long run. I had one in my Integra for about 8 months (before it got stolen last november), and i had no problems with it. I had a stock b16a2 head on top of it and pulled hella hard. I'm kind of thinking about doing the same thing to my civic eventually cuz i'm starting to blow smoke and eat oil out of my gsr motor.

[*inFamous*]

i had one in my car for about 8 months turbocharged on 10psi, never had an issue with it.

[ek-juan]

I give it a 4 :thumbup: and :smile: b20's never had a problem with them......

[95CIVICex]

yeah, i miss that torque that it had. Should i use my gsr head or would a b16 head be the best way to go?
I'm bout to get some cams, springs/retainers, vafc, and a dynotune on my gsr motor next week thats why i ask.

[*inFamous*]

im a big fan of a B16 head with proper valvetrain :)

As long as you treat your b20/vtec like a non-vtec motor in terms of rev's , it should last quite a while.

[95CIVICex]

does the b20 block like high compression pistons and if so, how high can i go and still be safe? if so, are stronger rods and a blockguard a must?

[Type - O]

i think the highest comp pistons come with the b20z. but thats with the b20z head and even then its only 9.6:1. arias sell the pistons youll need for higher compression

[*inFamous*]

Everything is 'safe' if you invest the proper amount of money in beefing it all up :)

[97BaggedDually]

also i heard that b20's have a little bit thinner cylinder walls. true i believe?

[CRX_N/a beast]

i have a jdm b20 block w/ jdm b16 head and i love this motor ive had no issues:clap:

[Mr.Burner]

also i heard that b20's have a little bit thinner cylinder walls. true i believe?

they are thinner, one piece sleeve. If your going to keep it stock. make sure to flycut the pistons and do rod bolts!!!

[YewllowDA]

i have a completely dissasembled b20z, hangin out on the stand. and GSR tranny internals also.
after looking at this thread.
it makes me wann put VTec on it too......hmmhttp://i48.photobucket.com/albums/f238/dateg/smileys/drool.gif

[honduh_head]

i would use the gsr head...it will net higher compression...ITR cams and a good header and that thing will smash

[95CIVICex]

So should i go ahead and get my gsr head built (buddy club spec3 cams, supertech valvesrings/retainers, apexi neo vafc) next week like i was planning or should i just buy an already built b16 head with 11k miles and the same shit on it?
...I'm gonna use the gsr block for now till i can save up enough for th b20 block later this year.
What would you guys do?

[YewllowDA]

i thought all heads have the same cc?

[Mr.Burner]

Nope, the GSR has a 'closed combustion" chamber

[95CIVICex]

i have a completely dissasembled b20z, hangin out on the stand. and GSR tranny internals also.
after looking at this thread.
it makes me wann put VTec on it too......hmmhttp://i48.photobucket.com/albums/f238/dateg/smileys/drool.gif

I had both cars at the same time and B20/VTEC Integra pulled harder than my B18C1 Civic ex. And it was a stock b16a head with a stock b20b bottom end.

[noVtecHERE]

i has a B20 Vtec with GSR crank and rods and 84mm CTR copys by RS i believe... dont remember which brand anyways they were from ebay, i know ebay right, revved it to 8k, there r soo many ways to go about things.. just figure it out, the cool thing is if u can get the compression around 10:1 at least, u can use a good set of cams, OEM honda would be ur best bet to keep Vtec engagment low and stay in Vtec with low shifts, i revved mine with the stock B20 bottom end to 7200 and after all Vtec at 4300 RPM was the best for me... just depends on setup...

[95CIVICex]

Nope, the GSR has a 'closed combustion" chamber

which one's better and why?

[noVtecHERE]

the flow is very similar but some argue that if u use the GSR you wontbe satisfied with the Flow... i argue that and say that it is better to use the GSR as u can retain a thinner head gasket and the PHK pistons and yield a decent amount of compression...

[CRX_N/a beast]

i had a gsr head same built as my b16 head and the b16 head seems to be the better 1 so thts my opinion b16 head is the 1 i would go with thts just from me having tried both

[Mr.Burner]

which one's better and why?
the both flow about the same, the only diff is the combustion chamber is closed. If youlook at a b16 or type R head they look the same. The GSR head as less volume in the cylinder which gives you more compression, if you welded the bottom of the head on the b16's or the type R's, I guess they would have the same combustion properties

[honduh_head]

good post ^

[DJ NeX]

well...I'm not going to go into detail, because it all depends on the amount of work you plan on doing to the head.

If you're doing a mild build, I'd roll with the b16 head, and use the pistons and head gasket to raise compression.

Don't go for a crazy compression ratio either. You should only do that if you really know what you're doing.

[95CIVICex]

well...I'm not going to go into detail, because it all depends on the amount of work you plan on doing to the head.

If you're doing a mild build, I'd roll with the b16 head, and use the pistons and head gasket to raise compression.

Don't go for a crazy compression ratio either. You should only do that if you really know what you're doing.

so would 11:1 be too crazy for the b20?

[noVtecHERE]

no... just dont go over i mid elevens.. cause then u start to push some limits... ur engine is going to peak early, for a mild build u dont need crazy compression..

[95CIVICex]

some ITR pistons should fit in there, right?
if so, around how much does it usually cost to have em installed?

[honduh_head]

some ITR pistons should fit in there, right?
if so, around how much does it usually cost to have em installed?

no ITR's are 81 mm bore...the b20 is 84 mm...import powerhouse offers an ITR replica piston for a b20....with an ITR header/b16 head and a vtec controller they made 205 whp and 150 ft lbs with those pistons...i believe it was 10.8 to 1 to 11.0 to 1 comp

[95CIVICex]

no ITR's are 81 mm bore...the b20 is 84 mm...import powerhouse offers an ITR replica piston for a b20....with an ITR header/b16 head and a vtec controller they made 205 whp and 150 ft lbs with those pistons...i believe it was 10.8 to 1 to 11.0 to 1 comp


coo man thanks! gonna go shop round now and start piecing shit together. also, thanks for all the replies from everyone else. all your input helps me out alot.

[honduh_head]

coo man thanks! gonna go shop round now and start piecing shit together. also, thanks for all the replies from everyone else. all your input helps me out alot.

no prob man...i love allmotor set ups...so any time someone asks a question i try to answer it if i can... :thumbup:

[Scott A.]

What about the oil squirters, or lack of on the B20, would that be of any concern on a B20/VTEC? I have also considered a B20/VTEC but was told its hard on the bottom-end because it was never designed to run VTEC, and the RPM associated with it...
I would love to drop a new drivetrain into my DA with stock B18A and LS tranny. I want something INEXPENSIVE,simple, clean and effective, I was just wondering what benifits (if any), my stock top-end, head, intake, ecu, etc. would do with a low mile B20 bottom end would have, vs. the stock B20 top-end. If that would get me just a little more pep than the 130hp I have now that would be great! Plus I would like to have a GSR tranny behind that combo.

[Type - O]

you have a LS motor? just do a LS/Vtec. get a b16 head and do a lil bit of work and throw on the head (short story). if done properly you motor will run strong and healthy

[Scott A.]

Will the LS/VTEC set-up gernade my high milage short block? I have 220k miles on what I was lead to believe is original and never over hauled, just kept up on the maintenance. My car is all stock and unmolested except for, removed silencer, Skunk2 sleeve coilovers w/Tokico struts, and Fat Fives. I bought it from an Acura Tech. Im new to Hondas but I really love em' now. Blah Blah, sorry. What about wiring for VTEC on my OBD0 non-VTEC ECU?

[honduh_head]

Will the LS/VTEC set-up gernade my high milage short block? I have 220k miles on what I was lead to believe is original and never over hauled, just kept up on the maintenance. My car is all stock and unmolested except for, removed silencer, Skunk2 sleeve coilovers w/Tokico struts, and Fat Fives. I bought it from an Acura Tech. Im new to Hondas but I really love em' now. Blah Blah, sorry. What about wiring for VTEC on my OBD0 non-VTEC ECU?

you can get a pr3 ecu and re pin it for hard wiring the vtec...its not too difficult, and honda tech has a ton of threads on doing this...have a compression check done to see if the motor would hold up to a vtec head....if the compression is good then i would try this first and build something else on the side in the mean time....g/l man

[Type - O]

^^^x2

[onefst91hatch]

and also if your gonna do a LS/vtec or CR/vtec then IMO you should always upgrade the oil pump to a GSR/Type R pump! but thats just my .02

[Scott A.]

Sweet thanks for the feedback!

[b20forlife]

i have a b20 vtec wit 12.1 compression pistons, eagle rods, stock crank and sleeves. i put a block guard and a port flow b16 head wit ferrera valve train and had it for about 24k miles and still runs good. its my dd. still doesnt smoke or anything. and pulls hard.