J32A2 ported & polsihed heads- Tweaking towards perfection
03-24-2013, 12:30 AM
#1
J32A2 ported & polsihed heads- Tweaking towards perfection
Some of you may have seen these heads before in build threads, for sale threads (as mock up), random pictures in threads, etc... I originally bought them for a build I was doing that has since been cancelled due to the turbo j35a8 98 Accord build thats nearing completion. Anyhow, Ive recently regained interest in them due to a top secret build Im doing for my 03 TL-S and wanted to dedicate this thread to making the perfect set of j32a2 heads...and I mean that in every aspect possible. 
Originally, they were ported (not polished) by a long time friend of mine and he opened them up pretty big. They WERE destined for a 3.5 large cam, NA build so I wanted big ports to make some great power. He himself did some amazing work in the 30+ hours or so he invested in them. I decided that I would take his work further and really tweak them by doing a polish for both the exhaust ports and combustion chambers. This will be done one thing at a time and I will update it with pictures for those who carry any interest in it. Just something for fun. As time progresses (up till the next build) I will add more to them here and there.
For now, Ive started and completed one head on polishing the combustion chambers. This was easily about 5-6 hours of work alone. I took some before and after pictures BUT the before pics were taken AFTER the progressive sanding process so it doesnt really illustrate the casting inperfections in the head. But even from sanding only, its a pretty big difference. Check it out.
Two pics taken after sanding down with 400 grit custom made rolls...
And then after polishing them...
Thanks, and stay tuned for even more!
Originally, they were ported (not polished) by a long time friend of mine and he opened them up pretty big. They WERE destined for a 3.5 large cam, NA build so I wanted big ports to make some great power. He himself did some amazing work in the 30+ hours or so he invested in them. I decided that I would take his work further and really tweak them by doing a polish for both the exhaust ports and combustion chambers. This will be done one thing at a time and I will update it with pictures for those who carry any interest in it. Just something for fun. As time progresses (up till the next build) I will add more to them here and there.
For now, Ive started and completed one head on polishing the combustion chambers. This was easily about 5-6 hours of work alone. I took some before and after pictures BUT the before pics were taken AFTER the progressive sanding process so it doesnt really illustrate the casting inperfections in the head. But even from sanding only, its a pretty big difference. Check it out.
Two pics taken after sanding down with 400 grit custom made rolls...
And then after polishing them...
Thanks, and stay tuned for even more!
The following 6 users liked this post by yungone501:
1foxbody (03-25-2013),
97BlackAckCL (03-29-2013),
deematic (03-24-2013),
Sonnick (03-24-2013),
Stephen00TL (03-24-2013),
and 1 others liked this post.
03-24-2013, 06:56 AM
#2
Senior Moderator
Very nice
03-24-2013, 09:53 AM
#4
All motor
Sick!
03-24-2013, 11:15 AM
#5
Murp.
If your going for perfection you need to take care of the high and low spots around the seats not just polish the chamber.
Those will give your chamber hot spots.
Also the more you work/polish the chambers you are losing compression.
But you know everything so you already know those things aswell.
Please resurface the heads when your done too,looks like you've had a few skip out's.
You don't wan't no leaking head gaskets.
If your going for perfection you need to take care of the high and low spots around the seats not just polish the chamber.
Those will give your chamber hot spots.
Also the more you work/polish the chambers you are losing compression.
But you know everything so you already know those things aswell.
Please resurface the heads when your done too,looks like you've had a few skip out's.
You don't wan't no leaking head gaskets.
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03-28-2013, 11:18 PM
#8
I wont disclose the persons name (as Im unsure if the person wants the info to be known) but there is a person here on Azine that says the stock head flowed a whopping 290 BEFORE porting was done to the head. This person also will have the heads ported post-p&p but Im not sure how much longer until theyre completed.
If these heads are flowing 290 stock, imagine what it could be afterwards. I know back when I was into small block V8's, the cylinder head manufacturer Air Flow Research (AFR) was making numbers around 320-340 on CNC'd top of the line heads that were several thousand dollars.
Our biggest obstacle IS NOT with the heads on these things...its being able to lift the valve high enough (and long enough) using a complementary camshaft. Funny how one of the engines best features (heads) is the limiting factor on producing horsepower!
04-02-2013, 09:52 AM
#11
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Shiny 
04-02-2013, 03:15 PM
#12
Oh geez, you really want me to type all of this? 
Let me summarize:
- six step sanding process from 60 to 400 grit. This includes rolls, wheels, pads and sand paper.
- three step abrasive buffing pads and compounds
- two step polishing using mainly bobs and cones with compounds. I always end using jewelers rouge to give it resilience.
Let me summarize:
- six step sanding process from 60 to 400 grit. This includes rolls, wheels, pads and sand paper.
- three step abrasive buffing pads and compounds
- two step polishing using mainly bobs and cones with compounds. I always end using jewelers rouge to give it resilience.
04-04-2013, 08:44 AM
#13
Senior Moderator
Awesome.
04-04-2013, 08:46 AM
#14
Senior Moderator
If somebody can find a reasonably priced shop with a good reputation, Id be happy to ship one out for flow bench testing.
I wont disclose the persons name (as Im unsure if the person wants the info to be known) but there is a person here on Azine that says the stock head flowed a whopping 290 BEFORE porting was done to the head. This person also will have the heads ported post-p&p but Im not sure how much longer until theyre completed.
If these heads are flowing 290 stock, imagine what it could be afterwards. I know back when I was into small block V8's, the cylinder head manufacturer Air Flow Research (AFR) was making numbers around 320-340 on CNC'd top of the line heads that were several thousand dollars.
Our biggest obstacle IS NOT with the heads on these things...its being able to lift the valve high enough (and long enough) using a complementary camshaft. Funny how one of the engines best features (heads) is the limiting factor on producing horsepower!
I wont disclose the persons name (as Im unsure if the person wants the info to be known) but there is a person here on Azine that says the stock head flowed a whopping 290 BEFORE porting was done to the head. This person also will have the heads ported post-p&p but Im not sure how much longer until theyre completed.
If these heads are flowing 290 stock, imagine what it could be afterwards. I know back when I was into small block V8's, the cylinder head manufacturer Air Flow Research (AFR) was making numbers around 320-340 on CNC'd top of the line heads that were several thousand dollars.
Our biggest obstacle IS NOT with the heads on these things...its being able to lift the valve high enough (and long enough) using a complementary camshaft. Funny how one of the engines best features (heads) is the limiting factor on producing horsepower!
04-04-2013, 11:53 AM
#15
They look great keep up the good work!! I'll send mine in the mail to you, and you can send me these. That would be a nice exchange program lmao!
04-04-2013, 02:02 PM
#16
These heads are destined for a 3.7 build that I'm currently in the process of getting together. They were opened up ALOT and I'm not so sure these would be suitable for daily driving as the torque would be greatly diminished. Hopefully, the displacement of the motor keeps that decent. The real purpose of the build is to make this 3.7 rev like a j32 and produce all of its power up top. Now that I've got cams...I'm pretty damn anxious.
04-19-2013, 12:42 AM
#18
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how did I miss this thread....am slacking 
Great work bro....the heads look awesome
Great work bro....the heads look awesome
02-03-2014, 04:03 AM
#21
Want to do that exchange program lmao?
02-03-2014, 09:13 PM
#23
02-03-2014, 09:58 PM
#24
These heads are destined for a 3.7 build that I'm currently in the process of getting together. They were opened up ALOT and I'm not so sure these would be suitable for daily driving as the torque would be greatly diminished. Hopefully, the displacement of the motor keeps that decent. The real purpose of the build is to make this 3.7 rev like a j32 and produce all of its power up top. Now that I've got cams...I'm pretty damn anxious.
I'm reading the torque will be "greatly diminished" with the ported/polished heads. I only like to concentrate on torque gains as I'm a huge fan of torque far more over than horsepower. My question to you is:
HOW MUCH will the torque be diminished on a j32 bored/stroked to a 3.7L (with these ported/polished heads) compared to a stock 3.7L (j32 bored/stroked to 3.7L with stock j32 heads)?
02-04-2014, 10:21 PM
#26
I'm reading the torque will be "greatly diminished" with the ported/polished heads. I only like to concentrate on torque gains as I'm a huge fan of torque far more over than horsepower. My question to you is:
HOW MUCH will the torque be diminished on a j32 bored/stroked to a 3.7L (with these ported/polished heads) compared to a stock 3.7L (j32 bored/stroked to 3.7L with stock j32 heads)?
HOW MUCH will the torque be diminished on a j32 bored/stroked to a 3.7L (with these ported/polished heads) compared to a stock 3.7L (j32 bored/stroked to 3.7L with stock j32 heads)?
The following users liked this post:
1foxbody (02-05-2014)
02-05-2014, 09:55 AM
#27
Senior Moderator
As you can see, they were sold. If you are truly shooting for four digit horsepower figures, then get the heads I sold Cocoa or hog out a set of j32a2 heads. Im sure at 25lbs+ of boost, stock ports will become quite restrictive meeting the airflow demands.
Hard to say really but I'd expect around 10-15ft lbs, give or take. If its torque you are after, I'd consider using the j37a1 heads. They have shorter/wider ports that actually help in maintaining airflow velocity which in turn helps the fuel stay suspended and thereby creating more power. This requires using the runners from the same engine (j37a1) and I recommend using the manifold from the j35z1 or j35z2 which has less volume/trumpet length than the larger j37 intakes which is ideal for supporting torque.
Hard to say really but I'd expect around 10-15ft lbs, give or take. If its torque you are after, I'd consider using the j37a1 heads. They have shorter/wider ports that actually help in maintaining airflow velocity which in turn helps the fuel stay suspended and thereby creating more power. This requires using the runners from the same engine (j37a1) and I recommend using the manifold from the j35z1 or j35z2 which has less volume/trumpet length than the larger j37 intakes which is ideal for supporting torque.
what my exact figures are yet but the torque i gained with my 3.7 build (fully ported and polished) is huge over the 3.2. This thing does things down low that the old 3.2 couldnt do nearing vtec cross over
02-05-2014, 02:13 PM
#28
02-09-2014, 12:48 PM
#29
Btw, just in case many haven't seen or read, the j-series type s heads flow around 270-280 cfm's on the stock intake ports. The biggest issue in terms of power production (as I've always said) is opening the valves up enough to cram air into the chambers. In other words, cams are the reason the ponies are still inside the stable.
02-09-2014, 07:00 PM
#31
Senior Moderator
There could be many reasons for why an engine would or wouldn't gain torque but in my case, the heads I had were gutted. Meaning the ports were opened up quite a bit and although the larger displacement would take better advantage of producing torque with them over a 3.2, I think they will really prove themselves wayyyyy up top in the rev range.
Btw, just in case many haven't seen or read, the j-series type s heads flow around 270-280 cfm's on the stock intake ports. The biggest issue in terms of power production (as I've always said) is opening the valves up enough to cram air into the chambers. In other words, cams are the reason the ponies are still inside the stable.
Btw, just in case many haven't seen or read, the j-series type s heads flow around 270-280 cfm's on the stock intake ports. The biggest issue in terms of power production (as I've always said) is opening the valves up enough to cram air into the chambers. In other words, cams are the reason the ponies are still inside the stable.
02-11-2014, 08:49 PM
#34
Senior Moderator
its winter here. Wake up to -10+ deg just about every morning. Im working on it though. Im focusing on some of the body work stuff right now to fit the 18x9.5 rims with 275s on them 
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