24-03-09, 02:36 PM
Sul forum delle Lincoln ho trovato questa interessante discussione. La copio:
I think Mark V owners may be interested in this.
My Mark V is one of those "time capsules" previously owned by the little old lady who hardly drove it. Mileage is 14,000. Triple white, it is like new.
I was well aware of the potential problems cars like this may have, through lack of use and/or maintenance.
After importing it here to Sydney and finally getting it on the road, I had been greatly disappointed in the performance-I mean, it just did not react when I hit the gas & it had no acceleration, although it started up well and ran smoothly and was ok on the highway once it got rolling. All the terrible things I had heard about 400 engines came to mind!
Everything on the car is original down to plug wires, hoses etc, so I checked the usual things-spark plugs, vacuum connections, vacuum advance, egr-all appeared to be OK.
I took it to my auto electrician who checked the timing on his machine & it was right where the book said it should be.
I eventually took it to a tune-up shop with a dynomometer.
Well, they got it on the dyno and it was putting out a blistering 45 hp at the rear wheels at 70 mph!
They found that the ignition timing was way off.
Apart from the timing, which they adjusted on the dyno-the only real way of getting it right it seems), several gizmos associated with emissions & exhaust were either blocked or seized, which they rectified.
The auto trans was also found to be slipping (hadn't been serviced) and the fluid burnt.
After proper adjustment, the car registered 120 hp at the rear wheels (with A/C on) at 70mph-hardly anything to get excited about, but obviously a huge improvement!
I was advised that this was as good as I could expect from the car without further modifications, and that the factory exhaust system with the restrictive twists & bends absolutely stifles the 400 engine in particular & that it seems to suffer power loss from this more than other engines.
They recommended that a properly made exhaust system in the original pattern but with larger pipework using mandrel bends for smoother flow to minimize restriction and maximize breathability would result in bigger hp gains.
If it were not such an original car, I would go with an intake manifold and Edelbrock carb as talked about elsewhere on this site, but I prefer to leave it stock at this point, and maybe just try the better exhaust system.
At least until the power lack drives me nuts!
I think Mark V owners may be interested in this.
My Mark V is one of those "time capsules" previously owned by the little old lady who hardly drove it. Mileage is 14,000. Triple white, it is like new.
I was well aware of the potential problems cars like this may have, through lack of use and/or maintenance.
After importing it here to Sydney and finally getting it on the road, I had been greatly disappointed in the performance-I mean, it just did not react when I hit the gas & it had no acceleration, although it started up well and ran smoothly and was ok on the highway once it got rolling. All the terrible things I had heard about 400 engines came to mind!
Everything on the car is original down to plug wires, hoses etc, so I checked the usual things-spark plugs, vacuum connections, vacuum advance, egr-all appeared to be OK.
I took it to my auto electrician who checked the timing on his machine & it was right where the book said it should be.
I eventually took it to a tune-up shop with a dynomometer.
Well, they got it on the dyno and it was putting out a blistering 45 hp at the rear wheels at 70 mph!
They found that the ignition timing was way off.
Apart from the timing, which they adjusted on the dyno-the only real way of getting it right it seems), several gizmos associated with emissions & exhaust were either blocked or seized, which they rectified.
The auto trans was also found to be slipping (hadn't been serviced) and the fluid burnt.
After proper adjustment, the car registered 120 hp at the rear wheels (with A/C on) at 70mph-hardly anything to get excited about, but obviously a huge improvement!
I was advised that this was as good as I could expect from the car without further modifications, and that the factory exhaust system with the restrictive twists & bends absolutely stifles the 400 engine in particular & that it seems to suffer power loss from this more than other engines.
They recommended that a properly made exhaust system in the original pattern but with larger pipework using mandrel bends for smoother flow to minimize restriction and maximize breathability would result in bigger hp gains.
If it were not such an original car, I would go with an intake manifold and Edelbrock carb as talked about elsewhere on this site, but I prefer to leave it stock at this point, and maybe just try the better exhaust system.
At least until the power lack drives me nuts!
![[Immagine: mbarn.jpg]](http://www.pdani.it/public/mbar/mbarn.jpg)
