kirk

Ideal bottom




Hey everyone how's it all going? I'm strongly hoping on receiving some reasonable info on what block I should be consider using with my application. I have a understanding of both bottem ends but I'm still puzzled! And hoping to hear from someone more knowledgeable than me.

So Ill start off with the set up I have, I have a build b16 head with a 3 angle valve job, ported and polish, s2 pro series cams, str cam gears, croWer lifters with a s2 intake manifold, and sir injectors and throttle body that will be changed.


Now this is where my question comes on whether which block to choose for the long run. I like to choose from the b18c (jdm) and or the b20 b?

I plan on going on mild boost anywhere from 14-20 pounds. And yes there are a few things I didn't mention at this time. But that's all I wish to know right now!

So if anyone can kindly give me open suggestions thAt will be greatly appreciated it. Thanks for your time.

Persia

with 14-20 pounds of boost stay away from b20 as they are not high reving engines. For your application i would go with b18c.

D.T.P

Depends on your budget. If money isn't a factor, I would say b20, there is no replacement for displacement . You WILL have to sleeve the block. Then get yourself some low compression pistons/forged rods. Bring her to gord bush or canadian cylinder head and get them to put in some oil squirters. Then slap the head on and you'll be good.

Ah I know somebody will come around knocking on me for saying b20, yes the rod/stroke ratio is not perfect for high revs, so you could get a b18c, stroker kit or just pistons and rods...really depends on budget/rpm range you wish to have most usable and moreover rpm limit. Oh and max power.

Now to explain myself why I said b20, well because everybody gets freaked out about b20v on boost. Just something to prove and be different really...

Persia

whats your budget?

zeeman

iTrader: (1)

Nothing wrong with b20v on boost as long as you dont get crazy and rev the crap out of it bc itll most likely make power until at least 8000rpms. When using a decent sized turbo or the legendary honda turbo e.i. t3/t4 57 or 60 trim or gt35r you'll be making 300whp 230+wtq at like 8-11psi depending on exhaust size and the type of turbo manifold you are using.

D.T.P

^^thats what i was thinking. 14-20lbs of boost is little steep unless you are using a tiny turbo which will not even hold that kind of pressure all the way to the top of rpm band.

MPR

14-20 psi is not mild boost levels. Not for a honda.

I love how people always choose their boost level and not their power goal...lol.

With those cams, you'll really want to get the cam timing set properly, otherwise the exessive overlap will not combine well with boost. If you were planning on building this engine to be boosted, you would have been better off installing cams designed for forced induction.

It'll still make gobs of power none-the-less, don't get me wrong...lol.

Sounds like an interesting build. Keep us posted on your progress.

D.T.P

To add to it, 14-20lbs of boost...on what turbo?

kirk

Same turbo that Andrew mentioned actually, and to let MPR know I know what kind of power I would like too accomplish! Thanks again to you all.

D.T.P

Um what?! You ask for advice, without providing much information. Things like:
-Budget
-Power goals
-Turbo size
-Will it be a street car/track car/both

All of those will suggest different routes you could take. Some are better than others.

zeeman

iTrader: (1)

14-20psi from a t3/t4 57 trim will make holes through the front and back of a b20 block, all day long.

The most i'd run would be maybe 12psi, tops. Even at 12psi you'll be making 270(ish)whp which is more than i would run if it was my b20.

MPR

^To add to that, to even have the remote possibility of running that much boost on a b20, you'd have to be running ultra-low compression pistons, which would kill the off-boost performance. Hence why I said before, 14-20 psi is not mild for a b-series honda, especially a b20. I'd consider 8-12psi mild.

OP: what are you going to be using this car for? Street, track, both? What kind of track?