8.50 index build

Todd Geisler · 06-11-2022, 10:11 AM

So Thursday was dyno day. Day went pretty well, made 6 pulls and decided to stop. The oxygen sensor on the Dyno Holley wasn't cooperating all that well. Felt we had a solid baseline tuneup saved which was really my goal for the day. Didn't hurt that the engine wound up making 15 more peak HP than before. O2's were still on the rich side (dyno o2, not efi) and the top end rpm limit was still a little low so it's safe to say there's still a little more power to be found down the road.

Engine changes since last time were swapping the too tall SV565 intake for a fully ported old school 2927 Super Victor. The last set of titanium valves gave us nothing but fits and were damaged so they were swapped out for a set of custom stainless valves along with a stronger spring package, new titanium retainers and titanium locks. While doing the intake fitment (cylinder heads have dowel shift) and porting on the manifold, the cylinder head guy found a couple small areas on the heads he wanted to adjust a little so we did. My guess is the additional power was from those small tweaks.

Got home from the dyno at 6:30, quick dinner and back out to the garage. Engine set in place by 9:00. lol

06-11-2022, 10:11 AM	#11
Todd Geisler Member Join Date: Feb 2002 Posts: 328 Likes: 64 Liked 345 Times in 149 Posts	Re: 8.50 index build So Thursday was dyno day. Day went pretty well, made 6 pulls and decided to stop. The oxygen sensor on the Dyno Holley wasn't cooperating all that well. Felt we had a solid baseline tuneup saved which was really my goal for the day. Didn't hurt that the engine wound up making 15 more peak HP than before. O2's were still on the rich side (dyno o2, not efi) and the top end rpm limit was still a little low so it's safe to say there's still a little more power to be found down the road. Engine changes since last time were swapping the too tall SV565 intake for a fully ported old school 2927 Super Victor. The last set of titanium valves gave us nothing but fits and were damaged so they were swapped out for a set of custom stainless valves along with a stronger spring package, new titanium retainers and titanium locks. While doing the intake fitment (cylinder heads have dowel shift) and porting on the manifold, the cylinder head guy found a couple small areas on the heads he wanted to adjust a little so we did. My guess is the additional power was from those small tweaks. Got home from the dyno at 6:30, quick dinner and back out to the garage. Engine set in place by 9:00. lol Last edited by Todd Geisler; 06-11-2022 at 10:19 AM.