what CR are you turbo guys running?
Apr 8, 2009 | 10:29 PM
#13
The rule of thumb I was told is that if your compression is low off the boost it will be more of a dog, once the boost comes on though it will be more of a monster because the transistion will be greater from nothing to hold the hell on. I just sold a 408 a built for boost and desided against going that route, it was almost 9.1 but I was planning on lots a boost in my Camaro and shooting for 1000rwhp. I would build it if it were be 10.1 and run 12-15 and meth. That way off boost it will respond a lot better and won't be such a dog.
However, mpg sucks ***. lol
Apr 8, 2009 | 11:38 PM
#14
9 Second Truck Club
iTrader: (16)
Joined: Sep 2006
Posts: 3,655
Likes: 5
From: Colorado Springs, Co/ Central, Ca
9:1 here. It's noticably stronger off boost than my 9.5:1 stock bottem end was, but ring seal is better, 5 more CI's, and bottom end is a little lighter. MPG seems to have taken a little hit with the lower CR.
Apr 8, 2009 | 11:47 PM
#15
Apr 9, 2009 | 07:58 AM
#18
My 370 is at 9.857:1 with -11cc pistons and 241 heads. Currently running 9.5# but plan on 15-16# very soon. Any additionaly boost from there, I am only a head change away from lowering the compression.
Apr 9, 2009 | 05:03 PM
#19
took the first plunge today. pick up my compstar crank and rods from RPM to day. guess 408 it is....LOL going to get a bigger turbo and sell the 1 week old tc-76. should have it next week in the truck!!
