Overbore and intake valve size

Bob Mulry · 08-28-2017, 12:09 PM

Well,

Just looking at an engine as an air pump.....

With a +.030 overbore the displacement is 308 ci

With a +.060 overbore the displacement is 314 ci

With a +.080 overbore the displacement is 318 ci

If you make 1 hp/ci you would gain 6 hp going to +.060 plus the additional compression.....

Just my thoughts,

PS:
Don't forget to stroke the crankshaft for additional displacement and compression
With a +.060 bore and a .013 stroke you end up with 315 ci

08-28-2017, 12:09 PM	#2
Bob Mulry VIP Member Join Date: Apr 2002 Location: Coarsegold, CA Posts: 1,016 Likes: 57 Liked 320 Times in 102 Posts	Re: Overbore and intake valve size Well, Just looking at an engine as an air pump..... With a +.030 overbore the displacement is 308 ci With a +.060 overbore the displacement is 314 ci With a +.080 overbore the displacement is 318 ci If you make 1 hp/ci you would gain 6 hp going to +.060 plus the additional compression..... Just my thoughts, PS: Don't forget to stroke the crankshaft for additional displacement and compression With a +.060 bore and a .013 stroke you end up with 315 ci __________________ Bob Mulry 7516 STK A & M Motorsports Last edited by Bob Mulry; 08-28-2017 at 12:12 PM. Reason: more math