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View Full Version : Stock shortblock strength...D16Y8 vs. D16Y7

torbs
10-16-2006, 06:57 AM
what's the differences in strength?...I found an EK hatch I wanna boost/mini me (mini me gives it 9.9:1 with a y8 head and 9.6:1 with a z6)...i want around 220whp...is the y7 shortblock up to it?
Jcazz
10-16-2006, 07:46 AM
the real difference i bealive is aftermarket support...i would just build that bottem end for realiblity, and keep the non-vtec head, just boost the crapola out of it. Run a good tune and get it dynoyed...this has been covered alot! search as well....Remeber that on ANY D-series Block, the weakeast link are the RODS!!! if you can get yourself a y8 head, that would also be a another option but will require more crap to go along with it...
skoracing
10-16-2006, 08:15 AM
both the same blocks..
chowmien
10-16-2006, 01:26 PM
what's the differences in strength?...I found an EK hatch I wanna boost/mini me (mini me gives it 9.9:1 with a y8 head and 9.6:1 with a z6)...i want around 220whp...is the y7 shortblock up to it?

It'll handle it fine. I make ~220whp and 171wtq on my stock y7 block with y8 head. Daily drive it and beat it to shit if I wanted to and it doesn't flinch.
gpny
10-16-2006, 02:35 PM
Y7 and Y8 are pretty much the same... only the head is different...
97blkcivic
10-16-2006, 03:08 PM
same block differnt heads really what u wanna do is keep the y7 head v-tech is overrated
torbs
10-17-2006, 02:46 PM
if they are the same then why according the the compression calc. do I get 9.9:1 when you put a y8 head on it?
drunkinmaster1
10-17-2006, 06:29 PM
theyre the same. only differance is the y8 has a knock sensor. both will do fine for boost.
sql_civic
10-17-2006, 08:36 PM
theyre the same. only differance is the y8 has a knock sensor. both will do fine for boost.

...and they have different pistons in them.

Y8 - P2P-000 pistons (compression height 29.50mm)
Y7 - P2E-000 pistons (cpmpression height 30.00mm)

Somewhere I think I recall reading that there is some slight difference in the block itself, but I can't remember. I could be wrong.
NEP-tuningalltheway
10-17-2006, 08:45 PM
same block differnt heads really what u wanna do is keep the y7 head v-tech is overrated

:slap: VTEC, ......


maybe vtecH is over rated

i'd run the y8 head with a cam get a little better mpg vtec is for economy soyour not on high cam all the time for a week end only car i'd run sohc non vtec with a fat cam but if it was a dd i'd run the y8 head with like a crower stg2 in it, personally i dont like the y bottom ends id rather just run a a6 or z6
cory jordan
10-17-2006, 08:56 PM
a6 =steel main girdle. also cheap and are proven race quality blocks.
SovXietday
10-17-2006, 09:14 PM
Same block, just port the oil pump whatever you do.
drunkinmaster1
10-17-2006, 09:30 PM
Same block, just port the oil pump whatever you do.

agreed. if you have an obd2 block, doing the edyn mods are a must to prevent a spun bearing.
http://www.theoldone.com/articles/d_series_engine_building_tips/
bearings can be hogged out as well.
SovXietday
10-17-2006, 09:36 PM
Haha, I want to get rid of my Y8 head because of the bastardization honda made of it, and I want to get rid of my Y8 block because of the oil pump.

Pain in the ass huh?