How much boost on forged 10:1 Compression motor?
12-12-2006, 02:14 PM
#1
Teching In
Thread Starter
Join Date: Mar 2006
Posts: 34
Likes: 0
Received 0 Likes
on
0 Posts
How much boost on forged 10:1 Compression motor? I am switching over from a NA/N20 setup to a FI setup and from my calculations, going to a 72cc head will bring me down to 10:1 compression. I currently have a 383 (3.905 bore x 4.0 stroke) with diamond pistons that have -2cc reliefs. I am really trying not to have to switch out my pistons, since this motor is brand new. I am only looking to make 650 whp at this point since my fuel system will only be a racetronix 255 pump and 60lb injectors. I was also told that having a set of LQ9 heads CNC'd to 76cc would not be recommended on a small bore engine such as mine. All help is appreciated.
12-12-2006, 02:52 PM
#3
TECH Junkie
iTrader: (2)
Join Date: Jan 2006
Location: Fort Wayne, IN
Posts: 3,776
Likes: 0
Received 0 Likes
on
0 Posts
not much over 9.5psi, and you will have to switch to 113+ octane. have done it, no problems, just have to keep the boost low. 9.5max unless better fuel. your probably going to have problems with your fuel system though. i did a 383 set up, d1sc 9.5psi, racetronix,msd bap,65lbs. and were out of fuel.
