[NordiX]

The D16y7 and y8's share the same bottom end right? The only difference between them being the Vtec head on the y8? (I mean, aside from the ecu, gear ratios and other obvious things related to the y7 being non-vtec and all...)

So would the upgrades civic1999 is doing to his y8 have similar benefits for a y7?

Just curious... I know a swap is the best way to really upgrade power in an LX, but I'm always interested in less expensive alternatives.

 

[kommon_sense]

Yes it would. You might want to look into a d16y8 head swap. It should be fairly inexpensive, you get vtec and another 20hp out of it. Add the cam and pistons and you are probably looking at a nice setup for probably under $1000. Thats great considering that a b16 swap will run you $3k after installation.

 

[NordiX]

Yes it would. You might want to look into a d16y8 head swap. It should be fairly inexpensive, you get vtec and another 20hp out of it. Add the cam and pistons and you are probably looking at a nice setup for probably under $1000. Thats great considering that a b16 swap will run you $3k after installation.

Hmmm, I like this idea... but if I swap the heads, what else needs to be swapped? ECU to control the v-tec obviously, but does the EX use the same cat/o2 sensors layout as the LX? Would I have change wiring harness?

I suppose if I do I/H/E with the head swap that'll solve a few of those issues...

Or I could just buy an EX or SI and start from there...

 

[cmills83]

how high of a compression ratio was your friend running?
i've personally run 11.2:1 on 93 pump gasoline with nothing other than very mild tuning done on a v-afc. the key to getting everything to run correctly is TUNING. your friend was either running above a 12:1 or he was completely ignorant of his car's state of tune. also i believe 117 octane is leaded fuel. his aluminum block and head would have lasted about fifteen minutes with leaded gasoline, unless i'm mistaken the two don't react very well.

Yeah you brought up a good point how 117 is leaded, I think that kid is a lair, I am going to go smack him and find out what he's really got.

 

[klungemonger]

The D16y7 and y8's share the same bottom end right? The only difference between them being the Vtec head on the y8? (I mean, aside from the ecu, gear ratios and other obvious things related to the y7 being non-vtec and all...)

So would the upgrades civic1999 is doing to his y8 have similar benefits for a y7?

The first thing you should do is swap in the EX tranny! Your stock ECU and internals will let you run over 7K rpms (I do it daily on my DX! ). You'll get the most performance gain just from that, since torque on the Y7 is higher at lower RPM than the Y8 even though peak torque is slightly higher with the Y8.

But the VTEC conversion will boost the top end. The internals aren't exactly the same, the pistons are different but if you are swapping in the A6 pistons it doesn't matter anyways. But if you keep your Y7 pistons and put a Y8 head on you will actually have slightly more compression than a stock Y8, based on some figuring I've done...

The converter/exhaust is different from LX/EX, but it's no big deal just get stuff for the EX and then get an EX or aftermarket cat and your good. The O2 sensors I think are the same but the 2nd one is in a different location. You can solve this with an EX harness or by extending the O2 sensor leads.

By the way, if anyone wants A6 pistons, I have a source so tell me the best price you can get and I'll see if I can do better...

 

[just chillin]

how high of a compression ratio was your friend running?
i've personally run 11.2:1 on 93 pump gasoline with nothing other than very mild tuning done on a v-afc. the key to getting everything to run correctly is TUNING. your friend was either running above a 12:1 or he was completely ignorant of his car's state of tune. also i believe 117 octane is leaded fuel. his aluminum block and head would have lasted about fifteen minutes with leaded gasoline, unless i'm mistaken the two don't react very well.

actually a tuned 12 cr CAN be run on pump gas. anything higher than that and you'd need race gas/octane booster. anyway ya there's no reason to run 117 octane (or whatever the top octane level is for unleaded) unless you're running 30 psi of boost. you can run 13 cr on around 100 octane safely.

 

[NordiX]

The first thing you should do is swap in the EX tranny! Your stock ECU and internals will let you run over 7K rpms (I do it daily on my DX! ). You'll get the most performance gain just from that, since torque on the Y7 is higher at lower RPM than the Y8 even though peak torque is slightly higher with the Y8.

Ya, I remeber discussing that with you on another thread. Definitely on my list of "to-do's"

Thanks for the info! (and the free bump I might add! BAAAHAHAHAHAHAAaaaaaooooo... k... inside joke y'all... not very funny either... ) <sigh>

Laterz.

 

[klungemonger]

Ya, I remeber discussing that with you on another thread. Definitely on my list of "to-do's"

Thanks for the info! (and the free bump I might add! BAAAHAHAHAHAHAAaaaaaooooo... k... inside joke y'all... not very funny either... ) <sigh>

Laterz.

Yeah, I say it all the time I guess. Must be sounding like a broken record (you know, those big black things people used to play music on... )

Hey don't mention the bump, I give em away all the time!

 

[DragonRacingCvc]

AEM cold air intke
prelude throttle body
Apex intake manifold
450cc dsm injectors
Venom fuel rail
Apexi fuel pressure regulator
Venom high flow fuel pump
Port/polished head d16y8 vtec
Stainless "V" cut valves
ZEX titanium springs and retainers
Machined dead flat head w/ copper o rings
d16a5 block, over board to 1.9ltr
Golden Eagle stainless sleeves to 1.8ltr
JE 11.5:1 high compression chromolley pistons
Titanium crower rods/pins
Turbo oil pan
Suston cometic 78mm copper head gasket
7lbs flywheel
clutch master stage 3 clutch
obx pullys (under + over)
OBX cam gear
JDM b16 cam cut+grind
Apexi SAFC
Custom program on p28 ecu
135 amp alt.
MSD 6al ignition + 3 stage retard


Total + labor = $13,000 = 315whp
Add on the 150 shot of dry nos = 438whp
2nd fastest all motor d16 civic <- My baby.
Good luck to all SOHC builders, the dream is possable

 

[civic1999]

Hay guys thanks for all the input you guys gave me and so new stuff I did not know,Well I think Iam going to do the A6 pistion swap with obd1 ECU head work,Cam,Vafc and Dyno tuning!! so thanks!!!!!!!! To Be Continued
:vivi: :zombie:

 

[civic1999]

t t t

 

[DragonRacingCvc]

whats up slim??

 

[civic1999]

Whats Up???

 

[civic1999]

Anyone else have any ideas???????