I need a Y8 head
11-14-2006, 10:42 PM
#21
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: I need a Y8 head
Originally Posted by MADMAX
JD seams to have done nice work with the Y8. I'd take his advice like the bible.
Originally Posted by MADMAX
Using Vitara's with this head "should" get rid of all that quench, so more timing "should" be possible. JD, what pistons combos have you tried on the dyno with this head?
I have a half dozen B-boys wanting dyno time, but they are mostly flakes or you have to roll them out of bed to play with their car. Ridiculous, really, but that's car ppl.
11-15-2006, 09:22 PM
#25
1.0 BAR
Join Date: Mar 2005
Posts: 263
Re: I need a Y8 head
Originally Posted by d16forlife
Does'nt a y8 head give you like 2hp over a z6 head? Wow that would really be worth the $ and 4 hours of labor 
-josh-
11-15-2006, 10:13 PM
#27
1.0 BAR
Join Date: Mar 2005
Posts: 263
Re: I need a Y8 head
Originally Posted by Joseph Davis
Sarcasm, n00b, do you see it?
Originally Posted by d16forlife
Does'nt a y8 head give you like 2hp over a z6 head? <------------legit question
Wow that would really be worth the $ and 4 hours of labor <-----------sarcasm
Wow that would really be worth the $ and 4 hours of labor
<-----------sarcasmSaying that swapping a y8 head for a z6 head only results in 2hp, since the factory hp ratings of these motors reflect such a change, is re-damn-diculous.
However, going from a z6->y8 head(with a different rocker/cam setup
) could give a significant gain in mileage(I've seen 5-6mpg in highway and city) and a "hp" increase due to the mild compression increase... Porting the 4 crappy intake bowls only helps...-josh-
11-16-2006, 07:32 PM
#29
1.0 BAR
Join Date: Mar 2005
Posts: 263
Re: I need a Y8 head
I guess you're right. High 14sec N/A d15 with 45mpg mixed driving w/ o2 enabled is sorta crappy anyway... I know, I've got lots of excuses in there, but I think it's impressive for what it is. Just like the stock bottom turbo'd crx's out there running 12.7's @ 106mph. It's fast for what it is. Everything is relative.
Also, I wanted to mention that less spark advance, with the same burn, leads to more power. People always think this is a bad aspect of the y8 heads, but in actuality, it means the mixture burns faster, and needs less timing advance. This means less force is exerted before tdc, which is good.
-josh-
Also, I wanted to mention that less spark advance, with the same burn, leads to more power. People always think this is a bad aspect of the y8 heads, but in actuality, it means the mixture burns faster, and needs less timing advance. This means less force is exerted before tdc, which is good.
-josh-
11-16-2006, 08:55 PM
#30
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: I need a Y8 head
No, it doesn't mean much of anything.
Burn happens so quickly, and in such a manner, that unless timing is grossly out of wack there is no appreciable pressure built at or before TDC. There is no situation here where ignition timing is varied and burn held constant. All the Y8 head design does is promote initial ------ of burn via quench. As such, your insinuation of Y8 > Z6 is invalid; aside from what timing they both like for a given airmass, they might as well be twins and dress up like each other.
Can you stop turning a silly thread based on misinformation into a pseudo tech debate based on the finer points of nothing? Thanks.
PS - 12.7@106 is a reflection on the suspension, 200-220 whp on a stock engine is nothing to write home about.
Burn happens so quickly, and in such a manner, that unless timing is grossly out of wack there is no appreciable pressure built at or before TDC. There is no situation here where ignition timing is varied and burn held constant. All the Y8 head design does is promote initial ------ of burn via quench. As such, your insinuation of Y8 > Z6 is invalid; aside from what timing they both like for a given airmass, they might as well be twins and dress up like each other.
Can you stop turning a silly thread based on misinformation into a pseudo tech debate based on the finer points of nothing? Thanks.
PS - 12.7@106 is a reflection on the suspension, 200-220 whp on a stock engine is nothing to write home about.
