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GTX JOHN · 01-10-2023, 12:47 AM

Same 440 engine in 73/74 is now 325 HP. (Factory 280)
We have a fresh ready to go engine 440/330HP
on engine stand and will be trying it this year if we race.

Basically 40 more CI and 31 more HP rated than our 400 now in
our 73 400 Roadrunner that runs 1.00 + quite a bit more
when we need to. Same Cam and heads etc.

The compression is the problem in both of the combos but
plenty of piston to valve clearance. We raced the 73/440 combo
many years ago.

01-10-2023, 12:47 AM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,484 Times in 697 Posts	Re: 78 440 mopar Same 440 engine in 73/74 is now 325 HP. (Factory 280) We have a fresh ready to go engine 440/330HP on engine stand and will be trying it this year if we race. Basically 40 more CI and 31 more HP rated than our 400 now in our 73 400 Roadrunner that runs 1.00 + quite a bit more when we need to. Same Cam and heads etc. The compression is the problem in both of the combos but plenty of piston to valve clearance. We raced the 73/440 combo many years ago. __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 01-10-2023 at 10:28 PM.