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Old 09-04-2014, 08:25 AM   #1 (permalink)
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Default D16y7 y8 head questions!

hey okay so i have a honda civic hx, its had two owners the first one i dont really know about but he swtiched the stock motor from the hx i believe with the d16y7 with a y8 head also, not to sure on the stock motor of the hx i believe its the d16y5 with vtec-e correct me if im wrong please, well anyways ive done a rebuild on it but i believe i need a different computer and a better tranny than the stock hx, gears are short @4000 rpm in fifth gear im only hitting like 80-85mph, also which computer should i replace the p2n(vtec-e) with my buddy told me the one from an honda ex which is basically the motor i have so p28 or p2p, trying to get max performance. havent done turbo yet but considering it in the future when the money rolls in.


Modifications: Headers, CAI, 3 Exhaust pipe, Purple hornie glasspak, basic shit,
not sure what to upgrade next will post better pics in a few ive recently painted the car too its no longer red. heres a pic after the rebuild.
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Old 09-04-2014, 08:30 AM   #2 (permalink)
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I think you need the P2P ECU, either OBD2A or B, depending on what year chassis you have (99-00 is OBD2B). Is your intake manifold a Y8 as well?
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Old 09-04-2014, 08:31 AM   #3 (permalink)
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First off.
What are you trying to do?
Have a working HX setup or Convert to and EX setup?

There is a guide on here for converting a hx to an ex. Look that up and i will help alot.
Next post the block code and the head code.
This will help find out what you have in the car now.

A p28 will need to be tune into to work to its fullest.
a p2p ecu will work if you have a y8 head and setup.
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Old 09-04-2014, 08:33 AM   #4 (permalink)
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the paint job
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Old 09-04-2014, 10:25 AM   #5 (permalink)
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Originally Posted by StuckInTexas View Post
I think you need the P2P ECU, either OBD2A or B, depending on what year chassis you have (99-00 is OBD2B). Is your intake manifold a Y8 as well?
not sure how do i check intake, and its a 97 honda civic hx
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Old 09-04-2014, 10:37 AM   #6 (permalink)
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Originally Posted by StuckInTexas View Post
I think you need the P2P ECU, either OBD2A or B, depending on what year chassis you have (99-00 is OBD2B). Is your intake manifold a Y8 as well?
here are these pics might help
intake says on back p2j hf-3 and then on the bottom 7614
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Old 09-04-2014, 10:54 AM   #7 (permalink)
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I think that intake is from a jdm d16y vtec head, which should basically be jdm y8 intake manifold. When I ordered up my d16y vtec head that is the intake mani that came on it. Has the egr located on the mani.
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Old 09-04-2014, 11:37 AM   #8 (permalink)
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Originally Posted by brundell88 View Post
I think that intake is from a jdm d16y vtec head, which should basically be jdm y8 intake manifold. When I ordered up my d16y vtec head that is the intake mani that came on it. Has the egr located on the mani.
what about tranny should i upgrade?
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Old 09-04-2014, 11:38 AM   #9 (permalink)
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Originally Posted by xile6 View Post
First off.
What are you trying to do?
Have a working HX setup or Convert to and EX setup?

There is a guide on here for converting a hx to an ex. Look that up and i will help alot.
Next post the block code and the head code.
This will help find out what you have in the car now.

A p28 will need to be tune into to work to its fullest.
a p2p ecu will work if you have a y8 head and setup.
convert to ex vtec and not vtec-e
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Old 09-04-2014, 12:37 PM   #10 (permalink)
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Quote:
Originally Posted by xile6 View Post
First off.
What are you trying to do?
Have a working HX setup or Convert to and EX setup?

There is a guide on here for converting a hx to an ex. Look that up and i will help alot.
Next post the block code and the head code.
This will help find out what you have in the car now.

A p28 will need to be tune into to work to its fullest.
a p2p ecu will work if you have a y8 head and setup.
the head says p2j-6 97 on right side and has this number stamped into it 707051478

intake says p2m-ao 970618 on side
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Old 09-04-2014, 12:53 PM   #11 (permalink)
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P2J-6 is a Y8 style head.
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Old 09-04-2014, 12:57 PM   #12 (permalink)
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P2J-6 is a Y8 style head.
how bout the intake mani is that y8?
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Old 09-04-2014, 01:12 PM   #13 (permalink)
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So this is what you have.

A hx intake manfiold. (The egr valve gives that away)
The head seems to be a y8 (^as said)
The block is a y7 ( stamp)
the trans is a dx (at lest that's what I remember s40 for dx and s20 for ex)

You need to go to the pass side kick panel and check the ecu code.
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Old 09-04-2014, 01:12 PM   #14 (permalink)
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Except for the EGR on it. That is a little different than a normal Y8, looks identical to the D16y5 intake.
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Old 09-04-2014, 01:18 PM   #15 (permalink)
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Quote:
Originally Posted by xile6 View Post
So this is what you have.

A hx intake manfiold. (The egr valve gives that away)
The head seems to be a y8 (^as said)
The block is a y7 ( stamp)
the trans is a dx (at lest that's what I remember s40 for dx and s20 for ex)

You need to go to the pass side kick panel and check the ecu code.
the ecu is a p2n vtec-e i know this for sure.
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Old 09-04-2014, 01:20 PM   #16 (permalink)
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Originally Posted by BeerDrinkin View Post
Except for the EGR on it. That is a little different than a normal Y8, looks identical to the D16y5 intake.
figured. any tips for an y8 intake mani? best bang for buck/performance.
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Old 09-04-2014, 01:21 PM   #17 (permalink)
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Originally Posted by Maz2112 View Post
the ecu is a p2n vtec-e i know this for sure.
OK your need to find a p2p y8 ecu.
You need to convert the 5 wire o2 sensor to a 4 wire sensor.

You can add the s20 transmission for short gears.

And just search the site hx to ex.
There is a few post on it worth reading.
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Old 09-04-2014, 01:25 PM   #18 (permalink)
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Quote:
Originally Posted by xile6 View Post
So this is what you have.

A hx intake manfiold. (The egr valve gives that away)
The head seems to be a y8 (^as said)
The block is a y7 ( stamp)
the trans is a dx (at lest that's what I remember s40 for dx and s20 for ex)

You need to go to the pass side kick panel and check the ecu code.
*so, so far i should get an y8 intake mani(got any prefrences that you think i should go with)
*p2p ecu
*and s20 tranny? correct?
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Old 09-04-2014, 01:27 PM   #19 (permalink)
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Originally Posted by xile6 View Post
OK your need to find a p2p y8 ecu.
You need to convert the 5 wire o2 sensor to a 4 wire sensor.

You can add the s20 transmission for short gears.

And just search the site hx to ex.
There is a few post on it worth reading.
ill have to research the 5 wire o2 sensor converson to the 4 wire cause i dont know how to do that.
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Old 09-04-2014, 01:30 PM   #20 (permalink)
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Quote:
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*so, so far i should get an y8 intake mani(got any prefrences that you think i should go with)
*p2p ecu
*and s20 tranny? correct?
The manifold is fine.
Ecu is needed
The trans doesn't matter. It will be a bit quicker tho with a s20.
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