LOST 10mph AND ABOUT 6 TENTHS

[MR DERBY CITY]

Check fuel system, , the 30 second jug test is a good start, replace the battery/batteries....Have you done any welding close to the car ? .....Some racers have reported that their car became MAGNETIZED and they lost plenty of ET and MPH ......3 ideas to PONDER ......

[monte8616]

Originally Posted by MR DERBY CITY

Check fuel system, , the 30 second jug test is a good start, replace the battery/batteries....Have you done any welding close to the car ? .....Some racers have reported that their car became MAGNETIZED and they lost plenty of ET and MPH ......3 ideas to PONDER ......

What else do you know about the magnetized thing? Very interesting...

[Jeff Stout]

Originally Posted by monte8616

What else do you know about the magnetized thing? Very interesting...

I know a local racer that determined the spun bearings came from arcing on crank to bearing clearance and made pit mark's on journal. He had connected ground to block and welded on frame.

[MR DERBY CITY]

Originally Posted by monte8616

What else do you know about the magnetized thing? Very interesting...

When I weld on my car I ALWAYS disconnect my MSD and all grounds to the engine block. Jerry Doughty from Louisiana was the racer that had to DE MAGNETIZE his stocker. Perhaps him or his brothers could jump in here on this thread. I remember it involved a compass and a cell phone ...his stocker had the same symptoms as your car....

[monte8616]

Originally Posted by MR DERBY CITY

When I weld on my car I ALWAYS disconnect my MSD and all grounds to the engine block. Jerry Doughty from Louisiana was the racer that had to DE MAGNETIZE his stocker. Perhaps him or his brothers could jump in here on this thread. I remember it involved a compass and a cell phone ...his stocker had the same symptoms as your car....

I don’t think anything was in the car when we welded but still a good thought - thank you! Nothing is a bad idea at this point!

[Greg Hill]

Is this a Quadrajet motor or Holley? If it’s a q-jet I would bet money it’s in the fuel system.
It’s critical to have enough fuel volume and a q-jet on a 454 SS motor would really stress your fuel system. A good pump like a Magnafuel, a #10 line from the cell to the regulator, appropriate return line, and a # 8 line from the regulator to the carb would ne required. Even if it’s a Holley I would do the same thing.

[Lee Jordan (3223) A/S]

Is the chassis still lose? Are all the wheels free, brakes bearings? What about the rear end? Could it be getting tight and slowing the car? Just something else to think about.

Lee.

[Jeff Niceswanger]

To slow down that much, and not have a miss, or a bog and not blow up quickly, has me thinking the timing is backing up on it. Somehow.....We had a bad transmission last year after the filter gasket became unseated and lost .13, but our MPH never budged, and your loosing both. That's a hundred horsepower your dropping. Do your headers look like they are getting hotter than normal? Like its baking the coatings ect?

[Kenney Kelley]

Originally Posted by Lee Jordan (3223) A/S

Is the chassis still lose? Are all the wheels free, brakes bearings? What about the rear end? Could it be getting tight and slowing the car? Just something else to think about.

Lee.

It might be time to check the Rubber brake lines or Stainless Steel hoses they might look good on the outside but swollen on the inside. I've had to change them on my pick-up truck so i know they go bad. Kenney Kelley

[Travis Miller]

Originally Posted by Lee Jordan (3223) A/S

Is the chassis still lose? Are all the wheels free, brakes bearings? What about the rear end? Could it be getting tight and slowing the car? Just something else to think about.

After years of working around dragstrips I am still surprised at the number of cars that are hard to push. Sometimes a car might not start at the scales and has to be pushed out of the way. A racecar should roll easily. The best example of how easy a racecar should roll belongs to our old friend Al Provoast (RIP). Al could push that big heavy station wagon all by himself. While that may not be the issue in this case, everyone should make it a point throughout the year to see how easily your car can roll. If something is causing it to become harder to push by hand, rest assured it has nothing to do with how the engine is running.