1968 Mercury Cougar GT-E 427/390 HP

Paul Ceasrine · 01-02-2013, 03:26 PM

Some general specifications,,,,

* Car Weight #3616 lbs.
* 123 lbs. of added 'Sound Deadener'
* The 427 engine weighed in at a heavy 675 lbs.
* Expensive to build
* Regular 390 GT Exhaust manifolds
* Single-point distributor
* Simulated hood scoops
* Nose-heavy car (Bumper, Hide-Away Light Assembly, Die-Cast Hood)

* Camshaft (Hydraulic) .481/.490 lift - 270*/290* Duration - 46* Overlap

* Rating = 390 HP @ 5600 RPM
* Torque = 460 Foot/Pounds @ 3200 RPM

Performance complaint. The car wouldn't rev near the numbers the factory stated. The valves started to float at 4600 RPM's.

Recommendation (For Street Applications)
* 3.91 Traction-lock gears (at a minimum)
* TRW .515 Lift - 300* Duration (Hydraulic Camshaft)
* Higher-rate valve springs
* Adjustable rocker arms

01-02-2013, 03:26 PM	#33
Paul Ceasrine VIP Member Join Date: Apr 2009 Posts: 2,546 Likes: 0 Liked 10 Times in 10 Posts	Re: 1968 Mercury Cougar GT-E 427/390 HP Some general specifications,,,, * Car Weight #3616 lbs. * 123 lbs. of added 'Sound Deadener' * The 427 engine weighed in at a heavy 675 lbs. * Expensive to build * Regular 390 GT Exhaust manifolds * Single-point distributor * Simulated hood scoops * Nose-heavy car (Bumper, Hide-Away Light Assembly, Die-Cast Hood) * Camshaft (Hydraulic) .481/.490 lift - 270/290 Duration - 46* Overlap * Rating = 390 HP @ 5600 RPM * Torque = 460 Foot/Pounds @ 3200 RPM Performance complaint. The car wouldn't rev near the numbers the factory stated. The valves started to float at 4600 RPM's. Recommendation (For Street Applications) * 3.91 Traction-lock gears (at a minimum) * TRW .515 Lift - 300* Duration (Hydraulic Camshaft) * Higher-rate valve springs * Adjustable rocker arms Last edited by Paul Ceasrine; 01-03-2013 at 10:12 AM.