383 & 20 , 520 makes a complete circle now connecting to 20 btw.. just opened new sc exit 6Originally Posted by stephensimmons
I knew I saw the Summerville sign somewhere but couldnt remember. I was in N Chas in Dec. and got lost on a wrong turn. 213 a and b or something like that, it was dark and I wound up in Santa wonder land lights everywhere.. some kind of park. I was supposed to go the other way to embassy suites lol.
Last edited by 2oodoor; 03-19-2010 at 06:55 AM.
Bout time they finished that! !ts been a while sence I been over there!
still trying to get the larger pics.
Last edited by stephensimmons; 03-20-2010 at 11:56 AM.
Ok here's the deal. I tore my a20a3 apart today. I wanted to build an 11.0 n/a motor. Well I ordered a new set of stock std bore(clevite) pistons for my rebuild and there the 8.8 compression ones not the 9.3 compression ones. I know the difference in the two is that the 8.8 engine had 110hp and the 9.3 engine had 120hp. No one makes the a20a3 pistons anymore which is the 9.3 compression pistons. The difference in the pistons is that the 8.8 has more of a dish than the 9.3 that hardly has any dish at all (ill post pics later when i get them cleaned up) also the 8.8 pistons has PJO stamped on the dome and the 9.3 pistons have PJOY stamped on it. What I wana know is should I install the new pistons or reuse my old ones sence ima shave my head .080 to get the 11.0 with the 9.3 pistons I should get 10.5 (sence there is a .5 difference in compression) with the 8.8 pistons which would be more friendly with the 93 octan than 11.0 plus ill have new pistons for when I do use my 50hp nos?
Ok here's the deal. I tore my a20a3 apart today. I wanted to build an 11.0 n/a motor. Well I ordered a new set of stock std bore(clevite) pistons for my rebuild and there the 8.8 compression ones not the 9.3 compression ones. I know the difference in the two is that the 8.8 engine had 110hp and the 9.3 engine had 120hp. No one makes the a20a3 pistons anymore which is the 9.3 compression pistons. The difference in the pistons is that the 8.8 has more of a dish than the 9.3 that hardly has any dish at all (ill post pics later when i get them cleaned up) also the 8.8 pistons has PJO stamped on the dome and the 9.3 pistons have PJOY stamped on it. What I wana know is should I install the new pistons or reuse my old ones sence ima shave my head .080 to get the 11.0 with the 9.3 pistons I should get 10.5 (sence there is a .5 difference in compression) with the 8.8 pistons which would be more friendly with the 93 octan than 11.0 plus ill have new pistons for when I do use my 50hp nos?
Would be cool to see a picture of the dish on these. Anyway, the first question is, how is the block? Does it need to be rebored? If so then you need oversize pistons and the ones you have are useless. The 9.3CR pistons should still be available from Honda in a slight oversize (0.3mm). IF the cylinders are too far out then aftermarket is the only option. Before you do anything else get that block checked.
If the block is still ok, check the stock pistons for wear. If they are ok too you could just put on new rings and go. Or if the block is ok but the old pistons are worn you could use the new ones. Although if that was the case I would return the Clevites and try to get the oversized Honda ones.
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The bore in the block is good and the pistons look good just they have 261,000 miles on them. this engine is being built so I can drive the car (and make it to the east coast meet in north carolina have a lil fun and make it back home) till I build my other a20a3 with forged pistons,rods,big valves,all ARP fasteners a GOOD set of headers and exaust and obd1 convertion.
If you're going to be building another engine with forged pistons and such then you might as well just throw in what you have now. With that kind of mileage I'm surprised the cylinders aren't worn. Hondas are reliable but that's a fair bit of miles.
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They are not perfect but ive seen worse and it has no ridge at all at the top of the cylinders ima just give them a good honing and insall the new piston and rings and a few other things. besides
I feel like if i do this one with the 10.5-11.0 compressions no one will be able to tell when i swap in my otha engine because ima use the same cam in both.
Last edited by stephensimmons; 03-22-2010 at 08:35 PM.
yeah you wont get 11:1 comp on stock pistons...you will need to get some aftermarket ones...
1989 Honda Accord LX-i
B18c1 swap since 7/2011
175whp and 132tq
Redzone tuned
I read that if I shave .080 off the head that i would get 11.1. They say for every .040 you gain 1.0 in compression so if I go .080 I would gain 2:0. So ima go .080 off the head so that would give me 9.3 + 2.0= 11.3 with the pistons in there now but i bought the 8.8 pistons so that would be 8.8 + 2.0= 10.8. I git a couple of extra heads so ima go for the .080 shave!
These were my estimations based on measurements of a stock chamber. I do have a chunk of a head that was cut up for research. I took off 0.080" and everything looks ok as far as the casting. One thing to watch for is the oil jet between cyls 2/3. It may be too long with the super milled head and might need to be cut down as well. Otherwise it should be fine.
Here's a picture:
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i would not shave the head that much...if you warp it you would have to replace it because it might not be safe to cut it up more...easyer to get high compression b18 pistons and get the pin on the rod bored out to 20mm to they can fit
1989 Honda Accord LX-i
B18c1 swap since 7/2011
175whp and 132tq
Redzone tuned
Now thats a good idea! Wish i thought of this(or talked to you before bought the stock pistons and dropped th head off but i got two extra heads) Thanks for the idea Messy!
Well this is what its all going in.
well for some reason i cant up load pics
Last edited by stephensimmons; 04-02-2010 at 08:54 AM.
if you are using IE 8 you have to allow it thru pop up block , look at notice about 1/3 from top of screen. Its not pop up block but in the same place that notice comes in usually. then re try the image.
Actually you could probably skim off a few more thousandths than 0.080", but pretty much you're right. If you milled to 0.080" it would be mostly a one way trip. Although if you're going to this extreme then you probably aren't that concerned about long term reliability anyway.
Easier? I don't think so. And I wouldn't want to bore out the stock rods anyway. That spot is already the weakest link. Boring it out would make it weaker. It's also more expensive than simply milling the head.
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Here's the pic of the pistons you asked for. The one on the left is the 88-89 a20a3 9.3 compression piston and the one on the rightis the 86-87 8.8 compression pistons. You can see that the one on the left has less of a dish than the one on the right and thats what made the difference in compression. Also you will notice that the 8.8 piston has a PJO part number and the 9.3 piston has a PJOY part number.
Here's the pic of the pistons you asked for. The one on the left is the 88-89 a20a3 9.3 compression piston and the one on the rightis the 86-87 8.8 compression pistons. You can see that the one on the left has less of a dish than the one on the right and thats what made the difference in compression. Also you will notice that the 8.8 piston has a PJO part number and the 9.3 piston has a PJOY part number.
Excellent! I've never seen the lower comp pistons before now. This makes it obvious why the CR is higher in the later A20s. Cool stuff.
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The funny part it that both engines has a20a3 on them.
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