piston question

[LiTtLe xOx BitT]

Im starting to look into parts for some engine work. I now have a head with 300 miles on it, so its pretty new. I also have a intake manifold from a 90-93 integra. Im going to rebuild the bottom end before putting these on. My question is how much can i safely bore it for everyday driving, and where can i get the pistons? I know the parts store sells pistons with a .50 milimeter bore, how much will that do?. I don't know too much about boring so any help is useful.

[ZackieDarko]

there was somebody on here last year that had his bored out to 2.5L

dimond makes custom pistons and im sure there are others...dimond seems to be the popular choice here

[mkymonkey]

i think the max you should go for every day driving is 30-40

[MessyHonda]

yeah i think derec has.040 over....and bobafett has .050 and he is going turbo later on.....according to bobafett you cant bore it out more than like 21** so that means like a 2.1L

[HostileJava]

Are you doing a motor build or are you going turbo? I have an extra new set of DX pistons(lower compression), if you are going turbo with it. I can bring them to the meet if you are interested.

[LiTtLe xOx BitT]

im not going to turbo it, i just want to get some more power. I just need to know where to get the pistons from.

[guaynabo89]

You can call around and ask to see if a perticular company makes em. Diamond I think is the only one.

If not any company can custom make you a set but you have to send in one of the pistons on your engine.

[FyreDaug]

im not going to turbo it, i just want to get some more power. I just need to know where to get the pistons from.

even if you overbore 0.050 thats nothing, you might get like 3 extra ft/lbs of torque and 2hp from that. You want power? Increase compression.

actually thats a lie with the 3 and 2 numbers, if your rings are shot your walls are worn and your getting excessive blow by it might be worth 50hp.

But seriously dude, if your gonna drop 600 on pistons atleast bring up the compression, because you can bolt on an exhaust for cheaper than that and see more gains

[MessyHonda]

yeah its true i agree with FyreDaug...increase the compression

[snoopyloopy]

check with adam. because he was saying that b16 or b18 pistons fit with some of their rods or maybe even our rods. all you need to do is machine the wrist pins to coincide between rod and piston. so then you don't necessarily have to get custom pistons, just get b18 pistons for a bored b18 with a custom wrist pin.
here's the thread where he talks about it: http://www.3geez.com/forum/showthread.php?t=52447&highlight=adams86lxi

[LiTtLe xOx BitT]

even if you overbore 0.050 thats nothing, you might get like 3 extra ft/lbs of torque and 2hp from that. You want power? Increase compression.
actually thats a lie with the 3 and 2 numbers, if your rings are shot your walls are worn and your getting excessive blow by it might be worth 50hp.
But seriously dude, if your gonna drop 600 on pistons atleast bring up the compression, because you can bolt on an exhaust for cheaper than that and see more gains
I already have an exhaust, header, CAI, adj cam gear, just got a rebuilt head with 300 miles, b18 intake manifold. So im trying to do some work on the bottom end. Im not trying to buy a $600 piston set. I just want to get a good amount power out of the bottom end that i can without spending a crazy amount of money. Im planning on rebuilding the bottom end so i figure i might as well do something a little better then a stock rebuild. I dont want anything wild, just a little better then stock.

[FyreDaug]

I already have an exhaust, header, CAI, adj cam gear, just got a rebuilt head with 300 miles, b18 intake manifold. So im trying to do some work on the bottom end. Im not trying to buy a $600 piston set. I just want to get a good amount power out of the bottom end that i can without spending a crazy amount of money. Im planning on rebuilding the bottom end so i figure i might as well do something a little better then a stock rebuild. I dont want anything wild, just a little better then stock.

Wel if you are overboring 0.050 your gonan need new pistons and the stockers wont cut it, your gonna have to buy a piston set, I suppose it could be cheaper than 600, but dude if your buying pistons, bored over pistons, why not up the compression? Isnt each point of compression equal to 1.5psi or something like that? So it seems like youve got the neccesary bolt ons to make some NA power, why not add another 15-20 with some compression too?

[Cheeseburger]

check with adam. because he was saying that b16 or b18 pistons fit with some of their rods or maybe even our rods. all you need to do is machine the wrist pins to coincide between rod and piston. so then you don't necessarily have to get custom pistons, just get b18 pistons for a bored b18 with a custom wrist pin.
here's the thread where he talks about it: http://www.3geez.com/forum/showthread.php?t=52447&highlight=adams86lxi


dam thats hot!!!

[MessyHonda]

the onlything if you raise compression you will have to run premium gas or else it will detonate if you try to run regular....but yeah you might want go get a 1+ for the compression so it will me 10.3....that would be hotness...lol

[snoopyloopy]

yeah, up the psi's for sure. and if the b20/b18 rod/piston combo thing really works out for us, that'd be pretty nice because those are relatively cheap compared to custom-made shit for us. and they're pre-made too.

[bobafett]

i agree with fyredog for sure. .050 (the bore that i have) isnt going to have a whole lot of whp over .010, but you will notice a bigger difference with tuning.

keeping in mind that higher cr pistons will require much more careful tuning, which can get spendy. :)

oh and .050 over bore gets you 2047cc which might be considered '2.1L' since 1955cc (our engines) are considered 2.0L

[LiTtLe xOx BitT]

How about these? http://www.partsamerica.com/ProductDetail.aspx?mfrcode=BAR&mfrpartnumber=012520320&parttype=154&ptset=A

[FyreDaug]

i agree with fyredog <snip>


:squint:



As for the link, I didnt see anything related to the A20 motor... Are you sure thats for it?

[szvosec]

Yeah I saw them they are:

Beck/Arnley Piston Assy: .50MM Over
Part Number: 012520320

[LiTtLe xOx BitT]

Beck/Arnley Piston Assy: .50MM Over

Part Number: 012520320

For Your Vehicle

Vehicle: 1988 HONDA ACCORD LXI
Engine: L4 2.0 Liter FI

Piston Set: 4 Per Car; Contains Piston Rings

Pricing
Our Price: $163.99

Availability
Ships in 2 business days (6.00 lbs.)
Warranty
1 Year Limited Warranty

[LiTtLe xOx BitT]

anyone ever use these?

[LiTtLe xOx BitT]

Another question. Since i have the head and b18 intake manifold laying around and im not going to put them on until i do the bottom end, what should i have done to them?? I was thinking along the line of port and polish type work, im not going to spent too much, i just want to know what small things i can do to add power.

[rjudgey]

If your not going to get Forged then the best ones to use are stock Honda A20A3/4 pistons have the higher CR and you can buy them in oversizes as well they do 83mm and one up from that but 83mm should be fine. The Beck Arnley, Sealed power are all federal mogul and they all come from the same crappy Mexico factory there poo the valve reliefs are in the wrong place and aren't big enough and they also have a huge dish so the CR ratio is really bad. Okay for Turbo though.