Honda Prelude Forum

i have a 3rd gen prelude the b20a5 motor blew a couple days ago i want to go with the b20a7 but cant find one anywhere can anyone help me out. i was wanting to know will it drop right in there without having to do anymods to my car it is the 1991 prelude si

Welcome to the site.

B20a7 is hard to find because it's a Euro-version of your motor. The extra 10 hp isn't worth the hassle of locating one. There are emission differences that give it that power rating. Not much too different than the a5, probably different pistons...but yeaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhh >

Your best bet is to do 3 things:
1) READ the 3rd gen forum stickies and resource guide.
2) Use the Search function
3) Purchase a JDM B20a Motor and call it a day.

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90 Si
04 TSX

Everyone! Resource guides are here:
5th gen.
4th gen.
3rd gen.
2nd gen.

prechate it man. im prolly just going to get the b20a5 again. i dont know i just didnt feel that much power with mine. 3rd and 4th wa kinda tourquey but not like everyone was putting these motors out to be.

This is why our motors are called "Bastard B series."

If you want the power, do it the good old' Prelude way.
H22.

:newangel:

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90 Si
04 TSX

Everyone! Resource guides are here:
5th gen.
4th gen.
3rd gen.
2nd gen.

You could always build and boost the B20.

or slap on a couple +5hp stickers, i hear thats what the cool kids are doing lol

thats not a really good idea boosting 3rd gens
the motor cant handle the stress of boost

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False.
B20a's take boost just fine. They double horsepower with 6psi with a turbine.


Search. Dont give out bad information...

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90 Si
04 TSX

Everyone! Resource guides are here:
5th gen.
4th gen.
3rd gen.
2nd gen.

can anyone help me find a b20 a5 engine? i cant find one anywhere?

Well, i'd have to disagree. I boosted my car last spring, ran hard all summer at the drag strip as well as some open lapping days. Still running fine to this day. Oh, 6lbs daily driven.

Where are you located?

douglasville ga

gonna have to disagree mang.


As far as a full drop-in. either use another b20a5, the JDM B20A: I think that one is rated 10+ hp than the B20A5, or if you could do a B21a1 if you're desperate (I wouldn't recomend it though: burns good amount of oil)

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i have the b20a5 in it already but it slung a rod. and i cant find another b20a5 for it at all