Hondaswap.com | Honda Technical & JDM styling Forums

ride_hard12 · 09-02-2006, 06:31 AM

which engine would u recomend? if the b20 what do i need to change my b21a1 to a b20a5 in my 91 Prelude SI?

d4000@comcast.net · 12-11-2006, 05:40 PM

I would also like to know this information. I have a 91Prelude with a blown b21A1 engine & need to replace it bad. Ca I use the B20a1 engine & if so what do I need to do to gt the job done.

AHHVTEC · 12-11-2006, 10:52 PM

the b21 has more power

1Funryd · 12-12-2006, 01:52 AM

The B20A is more reliable and is ready for boost.

Sean

riding 757 · 04-23-2008, 07:16 PM

but whats better

AHHVTEC · 04-23-2008, 11:47 PM

Quote:

Originally Posted by riding 757

but whats better

depends on what your goal is

BrutalB83 · 04-24-2008, 12:19 AM

Quote:

Originally Posted by riding 757

but whats better

Don't resurrect old threads dude, just start a new one...

AHHVTEC · 04-24-2008, 12:21 AM

Quote:

Originally Posted by BrutalB83

Don't resurrect old threads dude, just start a new one...

ahh hell i thought it was the ts who posted that lol, so yea to old of a thread

1Funryd · 04-24-2008, 01:33 AM

Quote:

Originally Posted by riding 757

but whats better

My personal feeling is the B20a, because you can boost it without killing your rings and it is reliable under boost when built properly.

The B21 has proven to be a good motor as well but it is way more temperamental, and needs more attention to keep it reliable. Even after a rebuild the FRM sleeves just eat thru the new rings that are replaced.

There have been other guys who relseeve the B21, but at that cost what is the point, you might as well have just picked up a B20A5 cheap at a junkyard or someone who is selling theirs.

The B20A5 came with factory sleeved iron sleeves, and are proven to handle 400+ HP. (just the block, the head will need to be strengthened)

Does that answer your question?

Oh and one more thing, dont think about going N/A build on a B20/B21 motor, the most you will get for spending $3000 will be around 150whp. Boost is the only way to pull any real power out of a B20A5 or B20A(JDM) and the B21A1 as well if you choose to boost that motor.

3GP Aftermarket Specialist.
Sean Tydingco

gmoney0517 · 07-02-2008, 02:30 PM

where can you find the neccessary kits/parts to turbo the b20a5? Im new to the honda game and would appreciate some advice.

efhondakid · 07-02-2008, 02:40 PM

You culd start a new thread instead of bringing back an old one.

Uncle Buck · 07-02-2008, 03:04 PM

Quote:

Originally Posted by gmoney0517

where can you find the neccessary kits/parts to turbo the b20a5? Im new to the honda game and would appreciate some advice.

why dont you check the thread where you started asking and i posted a responce..... oh here let me save you some effort and copy and paste the link

Turbo kit for b20a5

BrutalB83 · 07-02-2008, 03:05 PM

Eh, I suppose it's not really his fault. I told him to check out this thread and contact that 1Funryd guy...I was thinking more of a PM type thing, but oh well...at least he's in the right place...

09-02-2006, 06:31 AM	#1
ride_hard12 Chris Join Date: Aug 2006 Posts: 18 iTrader: 0 / 0% Ride: 91' lude Si 4WS Rep Power: 7	Which engine do i want? b20a5 or b21a1. which engine would u recomend? if the b20 what do i need to change my b21a1 to a b20a5 in my 91 Prelude SI?

07-02-2008, 02:40 PM	#11
efhondakid My name is Byron. Join Date: Mar 2007 Location: Akron-Canton, Ohio Age: 20 Posts: 5,421 iTrader: 2 / 100% Ride: 89' DX Hatch w/B16 Rep Power: 221	You culd start a new thread instead of bringing back an old one. __________________ ^ (dont listen) Dont PM me with tech questions. I will not answer them. There is a hidden message here. *"Motor swaps, turbo kit installs, diagnostics, minor repairs, minor fab and bodywork. Located in Akron-Canton area PM me for more details."* "In the dice game of life who gets the last roll?"

07-02-2008, 03:05 PM	#13
BrutalB83 Brutal Moderator Join Date: Jun 2006 Location: Rochester Hills, MI Age: 26 Posts: 7,822 iTrader: 0 / 0% Ride: 97 Integra LS Coupe Rep Power: 191	Eh, I suppose it's not really his fault. I told him to check out this thread and contact that 1Funryd guy...I was thinking more of a PM type thing, but oh well...at least he's in the right place... __________________ If you find something I say helpful, please send some rep my way! Also, DO NOT PM me with tech questions! Use the forums so we can all benefit from the answers. I will NOT respond to tech-related PMs... PSN Network ID: BrutalB83

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12-11-2006, 05:40 PM	#2
d4000@comcast.net Junior Member Join Date: May 2005 Posts: 4 iTrader: 0 / 0% Rep Power: 0	I would also like to know this information. I have a 91Prelude with a blown b21A1 engine & need to replace it bad. Ca I use the B20a1 engine & if so what do I need to do to gt the job done.

12-11-2006, 10:52 PM	#3
AHHVTEC Senior Member Join Date: Oct 2006 Location: Alabama Age: 30 Posts: 11,377 iTrader: 3 / 100% Ride: dc5,mk4 gti,2nd gen civic,92 accord cp,88 crx hf Rep Power: 272	the b21 has more power

12-12-2006, 01:52 AM	#4
1Funryd Member Join Date: Dec 2006 Age: 37 Posts: 72 iTrader: 0 / 0% Rep Power: 6	The B20A is more reliable and is ready for boost. Sean

04-23-2008, 07:16 PM	#5
riding 757 Junior Member Join Date: Feb 2008 Posts: 2 iTrader: 0 / 0% Rep Power: 0	but whats better

07-02-2008, 02:30 PM	#10
gmoney0517 Junior Member Join Date: Jul 2008 Posts: 2 iTrader: 0 / 0% Rep Power: 0	where can you find the neccessary kits/parts to turbo the b20a5? Im new to the honda game and would appreciate some advice.

Hondaswap.com | Honda Technical & JDM styling Forums

Which engine do i want? b20a5 or b21a1.