B18C built vs b20vtec built

**Chris S15** · 29-09-2010 05:07 PM

Hi All,

I'm in a big of a situation where, i've got an EG5 with a B20vtec + ITBs.

The problem with this is....engineering. If you know what i'm talking about, it's a bit of stuffing around. But basically, i have to change the itb to stock intake to pass an engineering certificate. I also need a stock/aftermarket quiet exhaust to pass emissions. I also want to have aircon and cold start, but with ITB's it just that more painful.

So, i've decided i'll be going to a B18C (integra vti-r) bottom end build.

The original b18 that was in my EG is still with the engine builder, so at least i can build that up and it's still registered to my chassis. =) (massive bonus!)

I'll be removing my head from my b20vtec and putting that on the b18c block. I'll just be running OEM parts in the bottom end rebuild, as i don't have to cash to use forged/strengthened items. I'll also be getting rid of the ITB in exchange for an DC2R ported Intake Manifold with a 68mm throttle body and a CAI. If i can find a mugen intake for an EG with a B series, i'll be snapping that up too. =)

It's heartbreaking taking apart the b20vtec build, as it's just so satisfying to drive.

Just wanted to see what experiences everyone else has with a b18c/b16 build compared to a b20vtec.

It's my daily driver and with summer coming up...i'd really like aircon. Or....am i just being a wuss about the aircon?

Is it worth going BACK to a b18???

Thanks!

Chris

**DNYALL** · 29-09-2010 05:29 PM

Hey mate, I went from a b16a to a b18c and that was a decent difference, then it blew so i had it built, camms, forged pistons etc etc and it was awesome, massive improvement!! Then I went to a built b20vtec with ITB's like you and the difference was ridiculous!! the built b20 with itbs was such a massive improvement on midrange over the b18. If i had a choice i would go the b20 with itbs no doubt but sounds like you don't have much choice. The built b18 will no doubt be awesome, but prob won't match your current setup. mind you, in the end, it all comes down to who builds it and who tunes it.

**quangsuke** · 29-09-2010 06:59 PM

u can always just at the moment slap on the head to your b18c block and get a stroker kit down the track.... but im not sure if that affects ur engineering etc.
just food for thought.

**Chris S15** · 29-09-2010 10:44 PM

Originally Posted by quangsuke

u can always just at the moment slap on the head to your b18c block and get a stroker kit down the track.... but im not sure if that affects ur engineering etc.
just food for thought.

This path actually works out as the most easiest way to avoid an engineering certificate. As long as the engine number is B18xxxx, then it's within the 15% maximum increase from the stock 1.6 litre capacity. But, having to stroke and sleeve a B18 is very expensive, compared to starting with a b20.

**JDM-EGG** · 29-09-2010 07:09 PM

why dont you, take off the itb's put on a intake manifold + stock exhaust to get it engineered then put everything back.. trust me its all worth it , you have a b20 with ITBS for sure craazy , wouldnt wanna waste it .. and your car use to be in my area was a machhhiinnneee

cheers

**dougie_504** · 29-09-2010 07:34 PM

Originally Posted by JDM-EGG

why dont you, take off the itb's put on a intake manifold + stock exhaust to get it engineered then put everything back.. trust me its all worth it , you have a b20 with ITBS for sure craazy , wouldnt wanna waste it .. and your car use to be in my area was a machhhiinnneee

cheers

Agreed.

You have a tough motor, built well. Get an OEM exhaust and intake for like $100 total and just pay for it to be engineered. How much is engineering up in NSW?

Friggin' worth it

**JDM-EGG** · 29-09-2010 07:52 PM

its all worth it , as u said ur willing to build a b18c ? when u can get ur b20 to get it up and registered for the money your spending on your b18 .

**eg5civic** · 29-09-2010 08:36 PM

would you sell the b20 block?

**Chris S15** · 29-09-2010 10:51 PM

Originally Posted by eg5civic

would you sell the b20 block?

No. The engine builder wants any part of my engine returned to him, instead of being sold. Perfectly understandable.

**TODA AU** · 30-09-2010 07:16 AM

Originally Posted by Chris S15

No. The engine builder wants any part of my engine returned to him, instead of being sold. Perfectly understandable.

Actually no, that sounds kinda weird & a bit like you're being led down the garden path.
Who is giving you the advice to spend more money & get another engine?
& "give" your old engine back? (That you paid for) Really?

**meatball** · 30-09-2010 08:14 AM

Originally Posted by TODA AU

Actually no, that sounds kinda weird & a bit like you're being led down the garden path.
Who is giving you the advice to spend more money & get another engine?
& "give" your old engine back? (That you paid for) Really?

^^^^^^^^^^

**Chris S15** · 30-09-2010 11:02 AM

Originally Posted by TODA AU

Actually no, that sounds kinda weird & a bit like you're being led down the garden path.
Who is giving you the advice to spend more money & get another engine?
& "give" your old engine back? (That you paid for) Really?

The reason is, I don't own the b18 anymore. It's just fortunate that it's still sitting there.

The reason why i have to fork out money for the b18 is because it's just the bare block we're starting with. I have to get new rods, pistons, etc for the bottom end.

The only things I'll be keeping from my b20 is the head and things that bolt on. Water pump, oil pump, alternator, etc. Basically trading in a b20 bottom end.