I'm pleased with the results after dyno testing my new N/A 331.Here's a list of the goodies...
Factory 5.0 .030 Block
Scatt Crank & Rods
Mahle Dome Pistons (11.9 compression)
AFR 205 Heads
Custom Ground SR bump stick 250ish @ .050 .653 lift ground on 108 (Thanks Nat's Racing! )
Joe Sherman ported Victor Jr
750 Mighty Demon
Once on the Stuska dyno we had issues getting the 1 3/4 headers to fit with my AFR heads. even with spacers the headers we're hitting the plugs so we had to settle with 1 5/8 headers which more than likely hold back a few ponnies on my 331 but atleast it would give us a real good idea of what we we're working with..(Nat's Racing builds mostly circle track stuff and most of the guys run Chevy stuff...so we we're limited on header options).Anyways...after the break in we did some baseline pulls trying different timing jetting and some experimenting with spacers we we're very pleased with the results Timing was set at 33 total, 2 inch open spacer worked the best. My Mighty Demon liked lots of jet 80 / 88 (as Demons usually do) We made a best of 515 HP @ 7,243 RPM and 432 Ft Lbs of torque at 5,200. We could have made a bit more if we spun it higher (as it never peaked) but I wanted to be conservative ( It is a stock block). Looking back I would have liked to made another pull and take a round of jets out (as it was a tad rich) But we decided to call it a day...I think if we had 1 3/4 headers it would have gained an honest 10 HP but who knows.... But that's fine cause I'm not racing the dyno anyway.....I'll let my time slips do that for me LOL...I can't wait to get in my ride now I know they're not on this forum but a HUGE thanks to my friend Mike Marsella & Nat Chiavettone over at Nat's Racing in Swansea Massachusetts. Great work! Great people! Below are a few pics and video....Hope you guys enjoy it!
Factory 5.0 .030 Block
Scatt Crank & Rods
Mahle Dome Pistons (11.9 compression)
AFR 205 Heads
Custom Ground SR bump stick 250ish @ .050 .653 lift ground on 108 (Thanks Nat's Racing! )
Joe Sherman ported Victor Jr
750 Mighty Demon
Once on the Stuska dyno we had issues getting the 1 3/4 headers to fit with my AFR heads. even with spacers the headers we're hitting the plugs so we had to settle with 1 5/8 headers which more than likely hold back a few ponnies on my 331 but atleast it would give us a real good idea of what we we're working with..(Nat's Racing builds mostly circle track stuff and most of the guys run Chevy stuff...so we we're limited on header options).Anyways...after the break in we did some baseline pulls trying different timing jetting and some experimenting with spacers we we're very pleased with the results Timing was set at 33 total, 2 inch open spacer worked the best. My Mighty Demon liked lots of jet 80 / 88 (as Demons usually do) We made a best of 515 HP @ 7,243 RPM and 432 Ft Lbs of torque at 5,200. We could have made a bit more if we spun it higher (as it never peaked) but I wanted to be conservative ( It is a stock block). Looking back I would have liked to made another pull and take a round of jets out (as it was a tad rich) But we decided to call it a day...I think if we had 1 3/4 headers it would have gained an honest 10 HP but who knows.... But that's fine cause I'm not racing the dyno anyway.....I'll let my time slips do that for me LOL...I can't wait to get in my ride now I know they're not on this forum but a HUGE thanks to my friend Mike Marsella & Nat Chiavettone over at Nat's Racing in Swansea Massachusetts. Great work! Great people! Below are a few pics and video....Hope you guys enjoy it!