second guessing doing the mini-me
12-17-2004 | 03:04 PM
#11
clutch slipping boost
Joined: Jun 2003
Posts: 1,696
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From: Minneapolis MN, Golden CO
first - with tuning compression wont be a problem, just have to be careful and not push the boost level. ive seen a GSR with either 10-11 compression ratio running 15 lbs, its all how you work things. (granted, he was built). not to mention stock GSR compression ratio is 10+ and people turbo those.
just tune, and do things safe and you'll be fine. and running925 is right, it'll be a bit more pleasurable with more compression.
just tune, and do things safe and you'll be fine. and running925 is right, it'll be a bit more pleasurable with more compression.
12-18-2004 | 05:42 AM
#12
Registered User
Joined: Jul 2003
Posts: 395
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From: Nashville, TN
Originally Posted by lkailburn
hmm that 10:1 number i posted seems to be the z6 mini-me.. and i hear that mini-me has a higher compression than the y7/y8
so i may not be so bad afterall. i'm going to look into cometic head gaskets.. just for a lil added thickness.
y7/y8 compression seems to be zero'ing in somewhere around 9:7 - 9:9:1
so i may not be so bad afterall. i'm going to look into cometic head gaskets.. just for a lil added thickness.
y7/y8 compression seems to be zero'ing in somewhere around 9:7 - 9:9:1
Both the Z6 and Y7 head have the same volume, so a swap would keep the stock 9.6:1 compression ratio. The Y8 has a 9.6:1 as well, but has pistons with a greater dish and quench pads in the head. The mini me would put you up over 10:1 for sure. I think this would work out well, the flow on the Y7 SUCKS. Talk to BauleyCivic over on H-T, he has a mini-me (D15B7/D16Z6) boosted, and he might have some tips for you.
12-18-2004 | 04:32 PM
#14
Joined: Jul 2003
Posts: 28,282
Likes: 0
From: michigan
Originally Posted by Running925
i probably would change the spring in your wastegage & lower it down a couple lbs.. running 7+ psi is probably going to be to much for a stock 10:1 compression d-series.. but get on the dyno & find out.. .. the numbers will tell you! 
h:
12-20-2004 | 04:54 PM
#18
Joined: Jul 2003
Posts: 28,282
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From: michigan
Originally Posted by lkailburn
hrmm bauley said: "A Y8 head on a Y7 will actually yield lower compression than a stock Y8 because the Y7 pistons have a larger dish"
hmmm
hmmm
12-20-2004 | 05:01 PM
#19
Your Powder Coater
Joined: Mar 2004
Posts: 4,463
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From: Girard, Ohio
Originally Posted by lkailburn
hrmm bauley said: "A Y8 head on a Y7 will actually yield lower compression than a stock Y8 because the Y7 pistons have a larger dish"
hmmm
hmmm
interesting!.....
12-20-2004 | 06:36 PM
#20
Thread Starter
college kid
Joined: Mar 2003
Posts: 2,000
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From: New York
bauley: "Read up on the Y7 and Y8 pistons...the B7 pistons are flat and the Z6 ones are dished, so the B7/Z6 mini me's have a 10:1 ratio. Both the Y7 and Y8 pistons are dished, the Y7's actually having the larger dishes, meaning less compression. A Y7/Y8 mini me will have lower compression than a stock Y8."
:thinking: could this be tru?
:thinking: could this be tru?