Rebuild - 3geez.com - One Site. Three Generations of Classic Accords

Scott · 05-21-2010, 12:02 AM

Ok, I'm rebuilding a '86 Prelude Si. It had 278,000 miles, but it still had plenty left if it hadn't spun a bearing. I've decided to put a little bit of money into it rebuilding and making it better, I'm not looking to pay a fortune. I starting with the basic stuff, headers, reman. crank, pistons and rings, rods, and probably porting the head too. Oh, and a tranny rebuild for the 5-speed too. Thinking about shaving the head a few thousanths. I've helped buddies rebuild some V8's, but this is my first solo rebuild. I'm looking for help on where the best places are to find these. Can I get forged internals? Can I buy oversized pistons if I bore it, and is it really worth boring it? Also, what is the flow on the stock injectors? How much flow can I go before it's too much? I don't know much about the head, is it something that I can tackle on my own? Is there anything else that I can do? I need help.

eduardo i. · 05-21-2010, 03:53 AM

I have only seen forged internals before on thirdgen preludes.If preludes are your questions, you should check out the following forums:

http://www.preludezone.com/
http://www.preludepower.com/forums/index.php?

As far as the head, you can really damage it if you dont use a flow bench, i would leave it to a good machine shop.The heather can be custom made or bought on ebay or craiglist( as the rest of the parts)Good luck

*2ndGenGuy* · 05-21-2010, 09:21 AM

Actually, your 86 Si has the A20A3 motor in it... so all your info can be found here on this site. Everything that applies to the Accord LXi motor will apply to yours, but you won't find any of that info here in the 2geez section, since the A20A3 only came in the 3g Accord.

eduardo i. · 05-21-2010, 11:58 AM

Wow cool to know

, so its basically a thirdgen accord engine? Any more details on this?

*2ndGenGuy* · 05-21-2010, 02:34 PM

I dunno what details to give. I just know that they are pretty much identical.

Scott · 05-22-2010, 07:59 AM

Yeah, I think it is a A20A3. Is there anything I can get for it, like forged internals? Pretty much the only thing I can find are cast alumn. from Summit Racing.

MessyHonda · 05-22-2010, 10:46 PM

Quote:

Originally Posted by Scott

Yeah, I think it is a A20A3. Is there anything I can get for it, like forged internals? Pretty much the only thing I can find are cast alumn. from Summit Racing.

if you search around you can find what stuff works for the a20

05-21-2010, 12:02 AM	#1
Scott DX User Join Date: May 2010 Posts: 2	Rebuild Ok, I'm rebuilding a '86 Prelude Si. It had 278,000 miles, but it still had plenty left if it hadn't spun a bearing. I've decided to put a little bit of money into it rebuilding and making it better, I'm not looking to pay a fortune. I starting with the basic stuff, headers, reman. crank, pistons and rings, rods, and probably porting the head too. Oh, and a tranny rebuild for the 5-speed too. Thinking about shaving the head a few thousanths. I've helped buddies rebuild some V8's, but this is my first solo rebuild. I'm looking for help on where the best places are to find these. Can I get forged internals? Can I buy oversized pistons if I bore it, and is it really worth boring it? Also, what is the flow on the stock injectors? How much flow can I go before it's too much? I don't know much about the head, is it something that I can tackle on my own? Is there anything else that I can do? I need help.

05-21-2010, 03:53 AM	#2
eduardo i. DX User Join Date: Jul 2009 Location: carolina, puertorico Posts: 65	Re: Rebuild I have only seen forged internals before on thirdgen preludes.If preludes are your questions, you should check out the following forums: http://www.preludezone.com/ http://www.preludepower.com/forums/index.php? As far as the head, you can really damage it if you dont use a flow bench, i would leave it to a good machine shop.The heather can be custom made or bought on ebay or craiglist( as the rest of the parts)Good luck

05-21-2010, 09:21 AM	#3
2ndGenGuy Join Date: Jan 2005 Location: Olympia, WA Vehicle: 1geez and 2geez Posts: 7,170	Re: Rebuild Actually, your 86 Si has the A20A3 motor in it... so all your info can be found here on this site. Everything that applies to the Accord LXi motor will apply to yours, but you won't find any of that info here in the 2geez section, since the A20A3 only came in the 3g Accord. __________________

05-21-2010, 11:58 AM	#4
eduardo i. DX User Join Date: Jul 2009 Location: carolina, puertorico Posts: 65	Re: Rebuild Wow cool to know, so its basically a thirdgen accord engine? Any more details on this?

05-21-2010, 02:34 PM	#5
2ndGenGuy Join Date: Jan 2005 Location: Olympia, WA Vehicle: 1geez and 2geez Posts: 7,170	Re: Rebuild I dunno what details to give. I just know that they are pretty much identical. __________________

05-22-2010, 07:59 AM	#6
Scott DX User Join Date: May 2010 Posts: 2	Re: Rebuild Yeah, I think it is a A20A3. Is there anything I can get for it, like forged internals? Pretty much the only thing I can find are cast alumn. from Summit Racing.