B20vtec questions.

[lil_foy]

Hi all,

It's coming up time that i'm looking to build a b20.

I'm just collecting up a list of parts at the moment.
I currently own a vtir integra + bolt on's so i'm just looking at engine parts.

Here's a list of parts I think i'll need?
b20 block (b20b or b20z ?)
Arp rod bolts
New timing belt (b18? since i'm using vtir head)
Vtec conversion kit
Computer+tune (not sure what computer)

I'm also going to rebuild it so it's a fresh motor (0km)
So i'd be including:
Bearings
Pistons
Full gasket kit

Since i'll be using stock vtir cams/head what pistons should I be using?

Also reuseable parts from my current engine?
Head assembly
Water & Oil pump

That's all I can think of at the moment.

Thanks,
Foy.

[GSi_PSi]

Stock pistons are fine but if you are going to take them out you might aswell notch them to be safe , or buy some cheap RS machines
If your going to keep the stock pistons then make sure you get the B20B8 with PHK written on the intake manifold cover, due to the better compression ratio
Everything seems to be right except you forgot breather kit. Computer there are many options, i would go for a hondata s200 pretty cheap these days.

[MikeyG]

Get type r water and oil pump

[Webby_roller]

I am very keen on watching this as i am in the same position. Aren't the water and oil pumps the same for the b18c2 and c7??? So you may be able to reuse them, but they are not that expensive to get new ones so it may be good to just get them for a bit of extra security.

[NSPYRE]

Stock pistons are fine but if you are going to take them out you might aswell notch them to be safe , or buy some cheap RS machines
If your going to keep the stock pistons then make sure you get the B20B8 with PHK written on the intake manifold cover, due to the better compression ratio
Everything seems to be right except you forgot breather kit. Computer there are many options, i would go for a hondata s200 pretty cheap these days.

is there an "off the shelf" breather kit you can buy specifically or is it custom fabricated?

[GSi_PSi]

you can buy the ENDYN kit

but its not nesessary. what you will need is
2 X prelude fitting for the back of the block (ill try get the part numbers)
2 X long hoses with clamps for each end
and can get an breather can with two ports off ebay or source one from somewere

[fatboyz39]

Late model b20vtec (B8) has the same oil pump as type R. Seems like you have the list sorted.

[lil_foy]

Stock pistons are fine but if you are going to take them out you might aswell notch them to be safe , or buy some cheap RS machines
If your going to keep the stock pistons then make sure you get the B20B8 with PHK written on the intake manifold cover, due to the better compression ratio
Everything seems to be right except you forgot breather kit. Computer there are many options, i would go for a hondata s200 pretty cheap these days.

Cheers mate.
What's the compression ratio going to be with stock pistons (b20b8 and stock b18c2 head)?
I'm happy to get aftermarket pistons if needed to bump up comp (11-1 ish) that's no problem with me, aslong as I don't have valve to piston problems.

B20's don't come with breather kits do they? I'm sure I can knock one up easy enough.

Also if i didn't get the golden eagle kit (we can make the braided lines+fittings ourselfs) what headgasket would I be using? b20? I realise i'll need to enlarge some holes on it slightly.

[GSi_PSi]

you can buy the gasket on its own, heaps of kits out there now, the compression ratio would just be over 10:+

[MikeyG]

Use a vtec head gasket as the b20 covers the holes

[lil_foy]

you can buy the gasket on its own, heaps of kits out there now, the compression ratio would just be over 10:+

From what i've read I could use itr Rs machine pistons? Will I need to machine these though? I'm presuming these will bump up the comp abit more aswell?

Use a vtec head gasket as the b20 covers the holes

See now i'm confused.
From everywhere i've read it's all said to use a b20 one and i'll have to enlarge the dowel pin holes.

[MikeyG]

well from what ive read the b20 non vtec head gasket covers the holes while the actual vtec head gasket doesnt. there was a graph lil foy let me get it for you 1 sec.