I friend of mine have a 4.6 stroked 5.0 , TFS head and Track cam , longtube and a blower with 17psi .
He had a head gasket failure because the water/meth pump break . he rebuild the engine , and the head . At the same time he change the valve spring , convert to 8 rib set up change the 3.6 blower pulley to a 3.0 , switch to VP MS109 racing fuel and installed a TH400 with a transbrake .
The run he had the head gasket failure , he ran a 10.80@100mph because he lift the throttle at the 1/8 miles .
Since the rebuild the engine never been able to do lower than a 10.95@123mph . I did a test and removed the discharge , convert the engine to run N/A and let the blower push the air in the athmosphere. The engine was not able to go past 5500 ... clearly a problem .
I did a leak down test , 15% +-3% on all cyl , and a compression test 170psi on bank 1 and 190psi on bank2 . I removed the valve cover , I turned the crank until both timing mark and copper timing link aligned , at this time the crank was at TDC . From the instruction sheet of Ford Racing , the bank1 cam is about 3/8 of an inch different than the driver side , that is right where it should be .
Long story but ..
If a cam is one thoot miss-aligned at the crank , this will cause the engine to have no power at all ??
While I was trying to remove the damper , I found that I could move the crank by 1/16 front to rear . I installed a dial indicator on the flywheel and I had .052 of front to rear gap .
the engine have about 15 quarter miles pass and 30 dyno run . I can t explain all that issues .
He had a head gasket failure because the water/meth pump break . he rebuild the engine , and the head . At the same time he change the valve spring , convert to 8 rib set up change the 3.6 blower pulley to a 3.0 , switch to VP MS109 racing fuel and installed a TH400 with a transbrake .
The run he had the head gasket failure , he ran a 10.80@100mph because he lift the throttle at the 1/8 miles .
Since the rebuild the engine never been able to do lower than a 10.95@123mph . I did a test and removed the discharge , convert the engine to run N/A and let the blower push the air in the athmosphere. The engine was not able to go past 5500 ... clearly a problem .
I did a leak down test , 15% +-3% on all cyl , and a compression test 170psi on bank 1 and 190psi on bank2 . I removed the valve cover , I turned the crank until both timing mark and copper timing link aligned , at this time the crank was at TDC . From the instruction sheet of Ford Racing , the bank1 cam is about 3/8 of an inch different than the driver side , that is right where it should be .
Long story but ..
If a cam is one thoot miss-aligned at the crank , this will cause the engine to have no power at all ??
While I was trying to remove the damper , I found that I could move the crank by 1/16 front to rear . I installed a dial indicator on the flywheel and I had .052 of front to rear gap .
the engine have about 15 quarter miles pass and 30 dyno run . I can t explain all that issues .
