Hmmmm nearly free B, should I!?!

[Waffles]

There is more than one version of the B20. The one that can take the 15 psi is the only honda engine with a closed deck. I dont remeber the ful b20?? crap but one does exist.

[Mwprs37]

There is more than one version of the B20. The one that can take the 15 psi is the only honda engine with a closed deck. I dont remeber the ful b20?? crap but one does exist.

H22a's and a1's I know for a fact are closed deck...

There are more than one version on the b20...I know one has higher compression...that would be the B20z...I dont know what the other one is for sure...

[99PreludeSh]

H22a's and a1's I know for a fact are closed deck...

There are more than one version on the b20...I know one has higher compression...that would be the B20z...I dont know what the other one is for sure...

Correct and the H22a4 is an open deck. Im lookin for some info on the b20's while being bored at work, as soon as I find some good stuff I will post it, because I could always learn more!

[Spork]

b20s can be decent runners, but you'll need to boost it to see any real performance out of it. $300 isn't nearly free, its pretty much the going rate for those motors, just remember when you replace the headgasket, you'll want to replace teh headstuds too (esp if you plan on boost) so thats more $$ to spend... the project *could* 'nickle and dime' you to death, so be careful

[Waffles]

From Wikipedia
Partially unrelated to the Honda B-series engines are the B20A and B21A. By some, these are not considered to be part of the B-series group of engines because they are not compatible with any of the other B-series parts or chassis.

There were 2 versions of the B20A

* The first generation of B20A engines was available in the 86-87 Prelude 2.0SI in Japan, the 86-89 Honda Vigor and Accord . It leaned towards the front of the car just like the A20A engine found in the same cars. This B20A produces 160 hp and 140 ft·lbf torque.

*
o There was also a similar engine named B18A for the 86-89 Accords. It was a destroked B20A powered by 2 Sidedraft Keihin carbs.

* The second generation of B20A was found in the 88-91 Prelude. The 88-91 Prelude B20A and B21A blocks are cast so they lay at an 18-degree angle leaning towards the firewall. This was done to please the exterior specifications for the 1988-1991 3rd Generation Prelude due to its ultra-low hoodline which Honda dubs the "engineless design".

The B20A, B20A3, and B20A5 engines consisted of closed-deck aluminum blocks with thicker-than-average iron sleeves where as the B21A1 had some special material.

The B21A1 was basically a re-worked B20A5 with an increase in bore to 83 mm. The external block dimensions had to stay identical to the B20A5 block so Honda called upon Saffil to create a thin but strong cylinder liner called FRM (Fiber Reinforced Metal) which basically consisted of a carbon fiber matrix, aluminum alloy, and aluminum oxide to make a very strong cylinder sleeve. These sleeves are so strong that they often do not lose their factory cross-hatching marks after 200,000 miles! A lot of B21A1 engines burn oil and have low cylinder compression numbers because the FRM material is so strong that it tears up piston rings. Good news though, you can usually replace the piston rings without any honing to the sleeves and go another 100,000+ miles without any sleeve wear.

[andyjt]

alright. i have the ability to get a b20 for 300+the 75$ towing fee to get it out of the shop its at.

it has a bad headgasket and thats all that is known to be wrong with it. its at the shop because the gasket and tranny are toast.

with these damages what do i need to look for to see if its still good, and also, what kinda price should i be looking at? i know B swaps are expensive as hell, but what if i already have the motor? what all needs to be replaced inorder to get her to work?

i drive a d16y8 ek.

Back to an original overlooked detail. Is it a prelude b20 or CRV b20.

CRV b20s bolt in as normal, Prelude b20s wont fit

[b18b-t]

actually its the weakest in stock form, it has siamese sleeves. They are also thinner than any of the other b-s.

:msntongue:

yep this is true... 375 is not a good deal for a b20 w/ blown head gasket and who knows what else.