Stock Power Output of 66-69 427/425 or 427/435
05-03-2009, 05:49 PM
#2
Race Director
No but recently seen a 69 427/435 dynoed. It was stock specs, heads and induction with a hydraulic roller and dyno headers. Just over 500 HP and torque at the flywheel.
Last edited by 63mako; 05-03-2009 at 08:42 PM.
05-03-2009, 07:40 PM
#3
Le Mans Master
Member Since: Mar 2001
Location: Watkinsville, GA and Glen Cove, NY
Posts: 5,789
Received 855 Likes
on
626 Posts
A couple of years ago, one of the magazines dyno tested a freshly rebuilt, stock to the letter 67 427-435 car and it made 287 hp to the tires. Again, that was bone stock through exhaust manifolds and the car had side exhaust.
Bill
Bill
05-04-2009, 12:58 AM
#5
Race Director
It is a 1969 427/435 hp engine. factory compression ratio, unported factory head engine built to factory specs with a correct tripower with a hydraulic roller cam upgrade. Dyno headers were used on the dyno run. Was built for a forum member. I thought this was how I described it the first time through. Sorry if I wasn't clear enough. 
05-04-2009, 12:07 PM
#7
Le Mans Master
Member Since: May 2002
Location: Lebanon Township New Jersey
Posts: 5,005
Received 706 Likes
on
401 Posts
It is a 1969 427/435 hp engine. factory compression ratio, unported factory head engine built to factory specs with a correct tripower with a hydraulic roller cam upgrade. Dyno headers were used on the dyno run. Was built for a forum member. I thought this was how I described it the first time through. Sorry if I wasn't clear enough.
05-04-2009, 02:19 PM
#8
Burning Brakes
Member Since: Sep 2008
Posts: 753
Likes: 0
Received 0 Likes
on
0 Posts
I'm interested because I was thinking to detune , in future , my L88 to L72 but 368hp are not exhactly amazing... I supposed the 427-435 was capable of at least 400hp...
Aldo
05-04-2009, 10:02 PM
#9
Race Director
Factory manifolds and stock side exhaust kill HP. I read somewhere, I think on this forum, they cost you 100 HP compared to headers and free flowing exhaust.
