What octane needed for SBC with 13 to 1 compres, steel heads

Geerhead55 · 08-10-2013, 01:50 AM

I too run 110, in an iron head 406 with 13.2 to 1 compression,(Probe pistons), typical Comp Cam roller with 630/672 lift, with Manley crank and rods. The heads are some old Motown 220s we had laying around,, did a freshen up on them and port match on a 2925 Super Victor,, threw a Proform/Holley hybrid 750 on it and made 625 on the dyno,, not earth shattering, but decent. The motor liked the smaller carb, as it lost hp with an 850 and a 950 we had with us. The 110 fuel seems fine. Good luck with your project.
Danny Durham

08-10-2013, 01:50 AM	#1
Geerhead55 VIP Member Join Date: Sep 2002 Location: Tacoma, Washington Posts: 1,632 Likes: 0 Liked 5 Times in 5 Posts	Re: What octane needed for SBC with 13 to 1 compres, steel h I too run 110, in an iron head 406 with 13.2 to 1 compression,(Probe pistons), typical Comp Cam roller with 630/672 lift, with Manley crank and rods. The heads are some old Motown 220s we had laying around,, did a freshen up on them and port match on a 2925 Super Victor,, threw a Proform/Holley hybrid 750 on it and made 625 on the dyno,, not earth shattering, but decent. The motor liked the smaller carb, as it lost hp with an 850 and a 950 we had with us. The 110 fuel seems fine. Good luck with your project. Danny Durham

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