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Old February 7th, 2016, 02:39 PM   #1
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J30a4 with j32a2 heads. What do you think?

Hi. I build my j34 engine.
And can use stock heads with RL cams or use j32a2 heads.
What will be better?
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Old February 7th, 2016, 03:29 PM   #2
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Not worth the money. Drop in a j32 block would be money better spent. If you do camshaft aftermarket. For sure. You will see maybe 2-5 who difference with oem camshaft.

Also invest in flashpro. Definitely money well spent also
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Old February 7th, 2016, 04:07 PM   #3
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Hi. I build my j34 engine.
And can use stock heads with RL cams or use j32a2 heads.
What will be better?
Quote:
Originally Posted by thisaznboi88 View Post
Not worth the money. Drop in a j32 block would be money better spent. If you do camshaft aftermarket. For sure. You will see maybe 2-5 who difference with oem camshaft.

Also invest in flashpro. Definitely money well spent also
Partially correct.
It is correct for most people. However due to your location I know that some work can be much cheaper than here stateside.

If you put the j32a2 heads on, you will have to modify your downpipe/j-pipe because the headers of the j32a2 do not reach as far.

If you wish to do this, and gain power, you would want custom headers made to reach our j-pipe, and the heads to be ported. If your heads are ported ( a good amount of port ) AND you get the headers custom made by someone with good knowledge, you have the potential to make more power, since you have a real set of headers instead of our incorporated ones.

If you do not know someone for all of this work, then drop a j32a3 head, j35a8 head, or j32a3 engine in ( ordered from least-most power) for power with no custom work.
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Old February 7th, 2016, 05:53 PM   #4
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Do not drop a j32a3, j35a8 or a j37a head on your j30 block there is a 3mm lip all around that will jack up the compression. You would have to mill the **** out of the heads. Pnp heads gains are minimum . look at my build and accord325 dyno.
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Old February 7th, 2016, 06:27 PM   #5
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Do not drop a j32a3, j35a8 or a j37a head on your j30 block there is a 3mm lip all around that will jack up the compression. You would have to mill the **** out of the heads. Pnp heads gains are minimum . look at my build and accord325 dyno.
pretty sure the CR is least of worries with extra flow. And plenty of j32a2 builds making tons of power due to extra flow and turbo and such.

Isn't gerzand running j32a2?
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Old February 7th, 2016, 06:59 PM   #6
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yeah he is running a j32a2 head... On A ****en sleeved/built j35a8 block and rotrex supercharger.
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Old February 7th, 2016, 11:22 PM   #7
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I cant find J32a3 short block in Russia, only j32a2.
I use Inspire UC1 pistons for higher CR.
Yes, it will be custom headers.

What about ECU? Can i use AT ecu on MT?
What should i use? Acura TL ecu or TLS?
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Old February 7th, 2016, 11:31 PM   #8
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I have j30a5 short block, ZDX rods and camshaft, ZDX TB and IM, Inspire pistons. Now i want to know which heads will be better. Should i stay with j30a4 heads or buy j32a2 heads =)
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Old February 8th, 2016, 08:07 AM   #9
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THe j32a2 head is better, but it will not match up to the cylinder bore. J32a2 head is 89mm the j30a5 bore are 86mm. There is a 3mm difference. Also can you run flashpro for tuning?

I have this for you. If you can run flashpro. A must have if you want to do a head swap

http://www.v6performance.net/forums/...-flashpro.html
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Old February 8th, 2016, 09:03 AM   #10
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yeah he is running a j32a2 head... On A ****en sleeved/built j35a8 block and rotrex supercharger.
Ouch.

I ran the car NA for a year after doing the head swap before adding boost. The eventuality of going supercharged wasn't a reason at the time...because well... I hadn't even thought about designing a Rotrex supercharger kit for the J-Series. In fact, I would FULLY recommend that someone run a Rotrex supercharger setup with a stock J30A4 head all day long with the exception of adding stronger valve springs or shimming some j35a8 springs to increase seat pressure.

The main reason for my head swap was for better exhaust flow when pushing a 225hp shot of nitrous oxide to prevent heat build up from the high exhaust gas temps that are common with nitrous. A person could also see some real world benefits on a mild NA build though, too - so I wont discredit the OP for wanting to do this.

If its worth the money or not is up to the owner. It's not really any more expensive than putting any other head on the car, aside from some MINOR exhaust fab work and mods to the head oil drains. Custom headers are NOT needed, but a modified j-pipe is.
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Old February 8th, 2016, 09:08 AM   #11
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^ not saying bad things about you Andy. You have awesome build going on. Nothing but respect for revolutionizing j-series builds.

But from experience the over size bore on the 89mm heads mated with the 86mm with not net power gain. It will net a lost of compression because there is now a overhang about 2-3mm that does not create a smooth transition between the head and cylinder
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Old February 8th, 2016, 11:03 AM   #12
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^ not saying bad things about you Andy. You have awesome build going on. Nothing but respect for revolutionizing j-series builds.

But from experience the over size bore on the 89mm heads mated with the 86mm with not net power gain. It will net a lost of compression because there is now a overhang about 2-3mm that does not create a smooth transition between the head and cylinder
Yes, you are right :-(
Ok, what about RL cams and springs? I want to buy flashpro
So, all i need is adapter and flashpro, right? And i shouldnt buy new ecu?

(Sorry for my english)
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Old February 8th, 2016, 01:30 PM   #13
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you can buy my harness, you still will need ECU, canbus line, and flashpro my friend. But I am not sure if the inspire ecu is the same as the USDM accord
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Old February 8th, 2016, 05:21 PM   #14
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If its worth the money or not is up to the owner. It's not really any more expensive than putting any other head on the car, aside from some MINOR exhaust fab work and mods to the head oil drains. Custom headers are NOT needed, but a modified j-pipe is.
Would getting custom headers made to fully harness the 3 port design not be a better idea than trying to extend the j pipe anyway though?
I mean if you're going to go with a head that has the option to have headers, might as well put some BFA headers on it vs trying to accommodate mediocre headers from an aftermarket source or even worse... stock
Correct me if i'm wrong though, i'm just theorizing here. I understand where you're coming from with the modified j-pipe being the more logical and cost effective solution, but on the other side of the world, especially in St. Petersburg(from what I hear) getting the headers made and getting the j-pipe modified may not be such a gap in cost/benefit as it would stateside.

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Yes, you are right :-(
Ok, what about RL cams and springs? I want to buy flashpro
So, all i need is adapter and flashpro, right? And i shouldnt buy new ecu?

(Sorry for my english)
The RL springs and cams would be very beneficial, and likely your best option for power unless you wanted to go aftermarket cams ($$$)
And don't worry, your english is very understandable. :-)
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Old February 8th, 2016, 11:32 PM   #15
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you can buy my harness, you still will need ECU, canbus line, and flashpro my friend. But I am not sure if the inspire ecu is the same as the USDM accord
I have AV6 manual trans. 2003
I hear that my ecu dont work with flashpro? Its true?
Can you say me what ecu i need? =) From TL 2004 or TLS 2007.
Or i just buy your harness and flashpro?

Dollar exchange rate is very high in Russia =) And its very expensive to buy something from USA. Average salary its 400-500$.
And they say that Lada its a good car
Its look like Iron curtain =) But for what? I dont know.

So, to made custom headers you need 300-400$
I will buy J35a8 heads from Honda Legend and use cams and springs from it
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Old February 8th, 2016, 11:43 PM   #16
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My car =)
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Old February 9th, 2016, 05:24 AM   #17
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I can supply the ECU also but it is still not going to be cheap. Unless u can get flashpro for cheap in russia its from 07-08 acura TL USDM spec

Last edited by thisaznboi88; February 9th, 2016 at 06:13 AM..
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Old February 10th, 2016, 03:41 AM   #18
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I can supply the ECU also but it is still not going to be cheap. Unless u can get flashpro for cheap in russia its from 07-08 acura TL USDM spec
There is no mt ecu in Russia. I want to buy ecu from USA but cant find it, tls or tl 2007 ecu.

And when i finish my j34 engine it willbe work with my j30a4 ecu?
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Old February 10th, 2016, 05:50 AM   #19
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You will still need my harness, and flashpro. You are looking to spend 1000-1500usd to get flashpro running. That is what most of us have spent to get it running

Message me if you want help finding a tl ecu

Last edited by thisaznboi88; February 10th, 2016 at 06:18 AM..
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Old February 10th, 2016, 08:20 AM   #20
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Here the flashpro manual from hondata.

https://www.hondata.com/images/04-06...structions.pdf

I have part of what you need. Zach can get you the rest.

http://www.v6performance.net/forums/...-flashpro.html
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Old February 10th, 2016, 03:06 PM   #21
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You will still need my harness, and flashpro. You are looking to spend 1000-1500usd to get flashpro running. That is what most of us have spent to get it running

Message me if you want help finding a tl ecu
1500$ its not bad =))) But it need for good work.
First time can i drive with accord ecu?
Yes i need help with tl ecu. What is the price?
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