Your 390 Numbers
Your 390 Numbers
Elder User
Joined: Jul 2010
Posts: 970
Likes: 0
I'm not 100% on the numbers because the PO had it built, 390 .10 over, it was a late 60's mustang motor 4v, rebuilt with edelbrock performer and carb, comp cam, around 10.5:1 compression. He said it was around 375-400hp and it feels like it, pulls extremely hard for a 5k lb truck, its in a 64 f250 4x4 4speed. Nice lopey idle and likes to pull till around 6k and that's where I think the heads need some love but it will be getting some ebrock aluminum heads this winter along with a full match port and some cleaning in the chambers and runners, might bump the cam up also.
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
all i have is desktop dyno 5 numbers
67 tbird 390 motor stock bore
10:1 hyperautic flat tops
lunati 62001 cam kit
stock valves home port job on intake /exhaust
HEI dizzy
performer intake
flotech headers
holley 750
67 tbird 390 motor stock bore
10:1 hyperautic flat tops
lunati 62001 cam kit
stock valves home port job on intake /exhaust
HEI dizzy
performer intake
flotech headers
holley 750
Laughing Gas
Joined: Aug 2008
Posts: 840
Likes: 8
Hmmm. Not sure this thread is best aimed at the FE crowd, who own old Ford pick-ups, but I'll add some rather useless, but true info.
When I modded my engine, I used a Crane Cam. I called Crane and the Tech ran all my engine specs through his computer program and came up with 480 peak Hp.
I rather doubt my engine acheives this. First of all, my engine is simliar to the old Police Interceptor, and I think that ran about 425 Hp.
Also, those programs assume a perfect air/fuel mixture and perfect ignition timing. Hard to get both of those dialed in unless you do dyno testing. Mind you, I do seat of the pants testing, and it's probably not horribly bad.
When I modded my engine, I used a Crane Cam. I called Crane and the Tech ran all my engine specs through his computer program and came up with 480 peak Hp.
I rather doubt my engine acheives this. First of all, my engine is simliar to the old Police Interceptor, and I think that ran about 425 Hp.
Also, those programs assume a perfect air/fuel mixture and perfect ignition timing. Hard to get both of those dialed in unless you do dyno testing. Mind you, I do seat of the pants testing, and it's probably not horribly bad.
Logistics Pro
Joined: Jan 2011
Posts: 4,762
Likes: 54
From: Antelope Valley ,CA
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