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TreeFrog169 · 01-18-2006, 06:55 AM

Ok, I need a D motor education.

I currently have a D16Y7 with just a touch over 200,000 on the clock. I am thinking of a rebuild, but here is the questions.

What D motor has VTEC and would be an easy swap or good head swap candidate? I was thinking of a head swap to get the VTEC but is it worth the wiring time and swapping a comp? What does the VTEC gain me?

Also bottom end. Is there any differences between my motor and any other D motors? If so what is it and which is better?

D16Y7 vs other D motors, which can be built better as far as reliability and reliable power and still be somewhat economical?

This is a DD and I am just looking for a mild rebuild with some more power. The D motor is what I want because they bolt up to the trans and stuff I have. I am leaning towards just rebuilding the motor I got just for the fact that I have it and I don't want to have to find a comp, head and wiring, and do any rewiring. But if it is justifiable gains to swap heads or motors than I will consider it.

Also what are some mods I can do to my current motor if I rebuild it for good power gains but not hurt its reliabilty? What is a good source for rebuild parts?

Thanks

cheese9988 · 01-18-2006, 07:30 AM

You can put the d16z6 or d16y8 head on there for vtec, that on a new motor will give you ~130hp. There are pistons/ring/rod packages you can buy for under $1000 to rebuild it. Rollerwave pistons, eagle rods etc. If it were me with just a dd and no turbo, I would just either put new pistons of the same make in it, or get some pm7 pistons out of a dohc zc to bump up the compression, those pistons you can find used much cheaper and probably just have to find new rings for.

trappd-in-859 · 01-18-2006, 10:16 AM

If you want some OK gains with the engine you have, I would go: I/H/E along with a ZEX cam and gear.

That setup should get you about an extra 10whp if tuned right.

reikoshea · 01-18-2006, 10:47 AM

200k on the engine...find a z6 or y8 and just do a full swap...those engines are everywhere...it shouldnt be too hard to find. If you want you can add a little home made turbo setup to it and then you have yourself a 13(ish) second civic [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

formby · 01-18-2006, 11:35 AM

I'm with reik...get the whole swap and use the pm7 pistons.........then street tune .....with that CR you could even use N2o once in a while.....

but i think a D is a better platform to FI just because of its low HP output....but a high CR D is a nice daily

somethingclever · 01-18-2006, 12:10 PM

if you decide to go with a swap- i have a d16z6 out of a 95 ex that had 50k on it when i wreck'd it.

Calesta · 01-19-2006, 12:35 AM

The previous post is right on the money.

Swap in a lightly used D16Y8. Wiring for VTEC is easy. If you have the desire to take the power up a bit, drop in a set of PM7/P29 pistons- but don't run the thicker head gasket to drop your compression. I know that I wouldn't- but tuning in the high 12s (compression) is a cakewalk for me on 93 octane. If you don't want to screw with tuning, just swap in a totally stock Y8 and be happy. It's still a big improvement over your tired Y7.

b18_speed · 01-20-2006, 01:40 AM

yeah i would have to agree, just save your money and get a different car which has more power goals that are easdier to obtain or do a big engine swap...

TreeFrog169 · 01-20-2006, 07:10 AM

Ok, I found a Y8 that needs a rebuild. Will I need the Computer from it for the VTEC? Also what is factory compression ratio on this motor? What wiring is needed for this swap? Thanks.

reikoshea · 01-20-2006, 08:44 AM

yes, you will need the computer from the 96-00 Civic EX (P2P). The Factory compression is 9.6:1. You need to wire for VTEC, that should be about it. Its gonna be 3 wires (if you count a ground as one of the wires).

divisii · 07-23-2006, 05:31 AM

Blanco nailed it.
Y7 & Y8 have identical bottom ends. What does VTEC gain you? 20 horsepower in stock form, that's nearly a 20% gain.
From what I've read the weakness comes from the need to enlarge and smooth oil supply through the block.

Calesta · 07-23-2006, 11:50 AM

Eh? You just pull the oil squirter thingy between cylinders 2 and 3. There's no englarging involved. This is a 6 month dead thread anyway. Check your dates next time!

01-19-2006, 12:35 AM	#7
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 25,391 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 391	The previous post is right on the money. Swap in a lightly used D16Y8. Wiring for VTEC is easy. If you have the desire to take the power up a bit, drop in a set of PM7/P29 pistons- but don't run the thicker head gasket to drop your compression. I know that I wouldn't- but tuning in the high 12s (compression) is a cakewalk for me on 93 octane. If you don't want to screw with tuning, just swap in a totally stock Y8 and be happy. It's still a big improvement over your tired Y7. __________________ DO NOT PM me with tech questions! Use the forums! Intercrew Auto Salon - (972) 485-8688


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01-18-2006, 06:55 AM	#1
TreeFrog169 Junior Member Join Date: Sep 2003 Posts: 5 iTrader: 0 / 0% Rep Power: 0	Ok, I need a D motor education. I currently have a D16Y7 with just a touch over 200,000 on the clock. I am thinking of a rebuild, but here is the questions. What D motor has VTEC and would be an easy swap or good head swap candidate? I was thinking of a head swap to get the VTEC but is it worth the wiring time and swapping a comp? What does the VTEC gain me? Also bottom end. Is there any differences between my motor and any other D motors? If so what is it and which is better? D16Y7 vs other D motors, which can be built better as far as reliability and reliable power and still be somewhat economical? This is a DD and I am just looking for a mild rebuild with some more power. The D motor is what I want because they bolt up to the trans and stuff I have. I am leaning towards just rebuilding the motor I got just for the fact that I have it and I don't want to have to find a comp, head and wiring, and do any rewiring. But if it is justifiable gains to swap heads or motors than I will consider it. Also what are some mods I can do to my current motor if I rebuild it for good power gains but not hurt its reliabilty? What is a good source for rebuild parts? Thanks

01-18-2006, 07:30 AM	#2
cheese9988 Senior Member Join Date: Apr 2003 Location: Rochester, NY Age: 29 Posts: 1,640 iTrader: 1 / 100% Ride: 2007 Chevrolet Cobalt SS Supercharged Rep Power: 31	You can put the d16z6 or d16y8 head on there for vtec, that on a new motor will give you ~130hp. There are pistons/ring/rod packages you can buy for under $1000 to rebuild it. Rollerwave pistons, eagle rods etc. If it were me with just a dd and no turbo, I would just either put new pistons of the same make in it, or get some pm7 pistons out of a dohc zc to bump up the compression, those pistons you can find used much cheaper and probably just have to find new rings for.

01-18-2006, 10:16 AM	#3
trappd-in-859 Senior Member Join Date: Jan 2005 Location: burlington, ky Age: 21 Posts: 595 iTrader: 0 / 0% Ride: 2009 mazda3i Rep Power: 16	If you want some OK gains with the engine you have, I would go: I/H/E along with a ZEX cam and gear. That setup should get you about an extra 10whp if tuned right.

01-18-2006, 10:47 AM	#4
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,941 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	200k on the engine...find a z6 or y8 and just do a full swap...those engines are everywhere...it shouldnt be too hard to find. If you want you can add a little home made turbo setup to it and then you have yourself a 13(ish) second civic [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

01-18-2006, 11:35 AM	#5
formby learning in progress Join Date: Feb 2003 Age: 27 Posts: 5,742 iTrader: 4 / 100% Ride: 00' Montero sport, 99' lsv civic Rep Power: 94	I'm with reik...get the whole swap and use the pm7 pistons.........then street tune .....with that CR you could even use N2o once in a while..... but i think a D is a better platform to FI just because of its low HP output....but a high CR D is a nice daily

01-18-2006, 12:10 PM	#6
somethingclever Junior Member Join Date: Nov 2004 Posts: 28 iTrader: 0 / 0% Rep Power: 11	if you decide to go with a swap- i have a d16z6 out of a 95 ex that had 50k on it when i wreck'd it.

01-20-2006, 01:40 AM	#8
b18_speed Junior Member Join Date: Jan 2006 Posts: 5 iTrader: 0 / 0% Rep Power: 0	yeah i would have to agree, just save your money and get a different car which has more power goals that are easdier to obtain or do a big engine swap...

01-20-2006, 07:10 AM	#9
TreeFrog169 Junior Member Join Date: Sep 2003 Posts: 5 iTrader: 0 / 0% Rep Power: 0	Ok, I found a Y8 that needs a rebuild. Will I need the Computer from it for the VTEC? Also what is factory compression ratio on this motor? What wiring is needed for this swap? Thanks.

01-20-2006, 08:44 AM	#10
reikoshea HS Troll...And Mod Join Date: Apr 2005 Location: San Antonio, TX Age: 24 Posts: 10,941 iTrader: 0 / 0% Ride: 2001 Honda S2000 Rep Power: 254	yes, you will need the computer from the 96-00 Civic EX (P2P). The Factory compression is 9.6:1. You need to wire for VTEC, that should be about it. Its gonna be 3 wires (if you count a ground as one of the wires).

07-23-2006, 05:31 AM	#11
divisii Member Join Date: Nov 2003 Posts: 162 iTrader: 0 / 0% Rep Power: 14	Blanco nailed it. Y7 & Y8 have identical bottom ends. What does VTEC gain you? 20 horsepower in stock form, that's nearly a 20% gain. From what I've read the weakness comes from the need to enlarge and smooth oil supply through the block.

07-23-2006, 11:50 AM	#12
Calesta Admin with a big stick Join Date: Sep 2002 Location: Dallas / Fort Worth, TX Age: 32 Posts: 25,391 iTrader: 0 / 0% Ride: 2003 S2000 Rep Power: 391	Eh? You just pull the oil squirter thingy between cylinders 2 and 3. There's no englarging involved. This is a 6 month dead thread anyway. Check your dates next time!