A20A3 question
 

Hello, my name is jon,
I have a 87 honda prelude si with a A20A3, and i was wondering if there is any sort of VTEC mini-me swap that could be done to this car. I was also wondering if there are any problems that people typically run ito when boosting this car, as i am thinking about going down this road as well. Any input is appreciated, thanks for the time and consideration on this.
BTW, just want to say that i love the site, its extremely informative to noobs such as myself, and i have learned quite a bit from this website already.

Re: A20A3 question
 

Hey Jon how are you doing? I appreciate your new post/membership. Unfortunately since I cannot give any advice on your question I just wanted to drop by and say hi!

By the way Jon I have a couple of pics to stash here,,,, do you mind?

Re: A20A3 question
 

go ahead

Re: A20A3 question
 

>:D >:D >:D >:D >:D >:D

Re: A20A3 question
 

There isn't any vtec head that will bolt on to that motor; I prefer a cam anyways. It's a great candidate for boost.

Re: A20A3 question
 

http://fhg.teachmefisting.com/16030/..._16030-075.jpg
http://accel19.mettre-put-idata.over...e/101-0217.jpg
http://www.zombi.dk/images/big_gallery/026a.jpg

Re: A20A3 question
 

thanks for that nsfw warning :3

Re: A20A3 question
 

Some people knew what was coming..

Re: A20A3 question
 

like i said, i am a noob. hahaa. Who makes cams for my engine? Na and boosted?

Re: A20A3 question
 

Re: A20A3 question
 

Check out 3geez.com, they have a lot of advice for that motor since the a20s also came in the 86-89 accords. Read up on them, and yes, boost it.

Good luck.

Re: A20A3 question
 

Damnit I actually clicked that.

A20A3 is an iron block, so it laughs at boost. However, I assume the weak point, as with most stock honda motors, will be the rods. Luckily, B18 rods are the same length and width as stock, and the big ends bolt directly to the crank. And with the use of +.080 B18 pistons (83mm), you can use 21mm wrist pins (19mm is stock A20A3 size pins). Get some blank forged low-compression pistons and have a machine shop machine the valve reliefs into them.

For cams, it's best to stay stock. It's really hard to beat the stock cam for boost. For NA, Colt makes a popular regrind they call "tri-flow", which just steps the opening of the intake valves instead of opening them up at the same time. Anyone that does cam regrinds can regrind your stock cam, though.

Re: A20A3 question
 

thanks, i'm going to check that out. I'll post in FI when i get finished with her. Thanks to all who helped.