is it worth buying a b20 for 749 + shipping or getting a b18a for 250 + shipping and boring the b18 to a 84mm bore to match the b20's bore. if i am going to sleeve the b20 or the b18 anyways what will be cheeper the b18 to 84 like b20 or b20 sleeve to 84.5mm bore. please, i need to know whats cheeper.

 

if you are going to do the same modifications to both engines (sleeving, pistons, etc.) then the b18a is going to be cheaper. 700 compared to 250.

 

so your saying that its going to be much cheaper, and possible, to take a b18a for $250 bore it to a 84.5mm and sleeave it then it will be to take a b20 for $750 and bore it too 84.5mm?. ill get the same power out of both?.dosent the b20b have a spot for a knock sensor or something and a oil pump or somethin when the b18 does not?

 

First, i wouldn't pay 800 dollars for a b20 block. What are your plans for the engine? what compression to you want? pistons and rods could run a pretty penny. Are you going to run frankenstein engines or non-vtec?

 

well i want to add a vtec head,and i want lower compression so i can run boost, which is the reason i want to sleeve. thats why i want to know if it would just be cheaper to match the same bore that i would do to a b20 only do it for cheaper since i got a b18a for 250. i do plan to get new rods, pistons, and arp rod bolts. to reinforce the block and make sure its strong enough to handle alot of boost with the sleeves and to make it more reliable while runing vtec.

 

If you are planning on running boost, there is a forum called forced induction right above this one where you'll find all the info you want.

if you are talking about boost, its a whole idfferent story than NA.

If you want a boosted 2.0 liter, either way you are going to have to sleeve.

 

i realise that im trying to go forced induction but its not a forced induction question, its a simple question of weather or not boring a b18a to 94.5mm or boring a b20 to a 84.5mm is the same and will put out the same power and if the b18a sleeves dont get to thin if you bore from 81mm to 84.5mm. i dont care about internals at all right now i only want to know about sleeves and that does not fall into the FI section set

 

Go with the B18a/b block if you're certain you're going to sleeve it, same result as the B20b/z for cheaper. I'd sleeve it to 85-86mm though.

 

god thanks, finally someone finally answered my question, im so happy.........

 

Happy to be of assistance.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bolivianstrtwpn &raquo;</TD></TR><TR><TD CLASS="quote">if you are going to do the same modifications to both engines (sleeving, pistons, etc.) then the b18a is going to be cheaper. 700 compared to 250.</TD></TR></TABLE>

 

Well first of all when you are building for all motor you are building a motor for much displacement high bore high stroke high compression large cams and a lot of overlap.

Why would any of us in here build a motor for boost? Do you think the guys in the FI forum are running stock motors? Not hardly. So go ask them what has given them good luck.

I would never boost a stock b20 block or I would never boost a stock Honda block. That's just not me.

Boost does not need big bore. I would NEVER go over 84mm for boost.

If I were in your posistion I would buy a GSR motor, sleeve it to 81.50mm, Pauter rods, CP 9.5:1 compression, SC63 turbo, Full Race manifold, 1060's, FAST EMS, and 110 octane tuned on around 26psi or so with a skyline 4 core. Maybe that's just me.

 

well yes i do plan to boost the block in the future. but what i am trying to do first is have a street respectful, and reliable motor. respectible in my eyes is something that is not done often, at least not near me, which is the reason i am going to do a frankenstien. but they are very unreliable unless they are built right now the b20 already has weak sleeves as it is. so i would have to sleave it in the first place if i want to run vtec and not blow it up after 30,000 miles also since the rods of a b20/and an ls are weak as it is they can not handle vtec because of the long stroke and the power gain that comes with adding vtec. but i want the desplacement and with the b20 you get more displacement then the gsr because of the bore of the cylinders and the long stroke. but i also would like to be cost effective and not have to pay for something that i can possibly get out of shomething cheaper. which is why i now have chosen the ls i am getting a b18a longblock for 250+shipping as opposed to 750+shipping and i can easily bore the b18a to the same as that of a b20 when i have it sleeved. this im sure anyone would agree is more cost effective. as for future plans to boost the block the B18a/b and b20 have a much lower c/r then a b16 or gsr and the b20 and b18a are more affordable then a gsr or b16. so as a conclution i have a powerfull, sleeved,respectible, lower compression motor then a gsr, for cheaper then it would cost to build a gsr, and will run boost very nicely...i appreciate all the information that everyone has offered. but from hearing my decission i would still like to hear what you think. again thanks

 

how about you stop spending money on goddamn body kits and subs and be a real man so you dont have to worry about the money thing. rice boy.

see you at work dan.

 

haha *******, yeah see ya man

 

I would get the b18a and get it sleeved, it will be worth it in the long run.