428 on 87 octane
428 on 87 octane
FE "Freakin Expensive"
Joined: Dec 2003
Posts: 6,461
Likes: 4
From: Smith Mountain Lake, VA
I guess it all depends on how much compression your running?
Depending on compression..you can aleays retard the timing a few degrees... but you will lose a little HP and torque!
Good luck!! Russ!
Depending on compression..you can aleays retard the timing a few degrees... but you will lose a little HP and torque!
Good luck!! Russ!
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
You could also modify the combustion chamber and unshroud the valves to gain CC's there. That will lower the compression ratio and also help put back some of the power that the lower compression ratio will lose. While you're in there, polish the combustion chamber. Theory is that it makes the carbon not stick as easily. Also free's up some CC's.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
I don't see why it wouldn't run with higher compression, the 10.25 to 1 comp ratio 390 runs fine on 87 octane. Initial timing is 12 degrees, heads are C8AE-H's ( completely stock),pistons are the original cast flat-tops cam is a Crane 272 degree Energizer, intake is a 428PI with a 750 Holley. We use 87 octane mixed every other tank with CD-2 lead substitute.
