Join Date: Feb 2003
Location: melbourne, australia
Re: 9.5 compression ok for blown LPG engine?
im doing some thing similar, a 400ci, b&m 162ci blower, 302 heads. with a rv cam, close overlap, it blew the boost out the exhaust, making about 2lb's, and pinging with twin convertors, and twin 425's. ive rebuilt the motor, blower cam, and opened up the 302 heads, almost as big as open chambers. i can still run 2 head gaskets, if needed, as i dont want to go coppers. i dont think you can get thicker composite gaskets, but hopefully im wrong. i dont know what the comp was, but 4" bore, 4" stroke, dished pistons and closed chambers, would be pretty high.
ford 79 f150 4wd, lifted 6", 15 x 10 alloys,38.5 x 14.5 swampers, 400ci supercharged, c6, np205, 9" and dana 44, side pipes, big stereo, step side body