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1966 Fairlane With 502

1172 Views 32 Replies 11 Participants Last post by  19Fo79rdF250$, 
john48404way
Installed a ATK 502 525 HP engine in the Fairlane. Had some over heating problems at 1st......fixed that with 2 elec fans and water pump fan.......... Now seems not to be producing 525 HP. Should be a screamer but not living up to ATKs HP claim ?

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The Mad Porter
john48404way said:
Installed a ATK 502 525 HP engine in the Fairlane. Had some over heating problems at 1st......fixed that with 2 elec fans and water pump fan.......... Now seems not to be producing 525 HP. Should be a screamer but not living up to ATKs HP claim ?
Click to expand...

Cylinder head type?
Total ignition timing?

AF ratio?



Improper tuning has disappointed more than a few engine owners.

Down on power since running hot?

How hot?







Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
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The Mad Porter
john48404way said:
Initial timing is 22 deg have moved it up and down. Has MSD ign. Holly 780 that has been tuned.
Click to expand...

Eddy heads typically need about 34 to 36* total timing.

Eddy valve springs for the flat tappet cams are inadequate and the engine starts to hit a brick wall.

You'd make 5% more power if you could get your running temps down to 160f






Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
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The Mad Porter
john48404way said:
Engine now is running 170 Carb is 850 Holly miss spoke earlier. Eddy springs are not good ? Humm.

The scoop. I did buy the 545 engine and talking with others was convinced the cam might be too much for street use and would have little or no vacuum. Talked to ATK and they agreed. ATK advised the only difference in the two engines was the cam. The 545 version has a Comp cam 253 253 with 585 585 lift... the 515 engine has a Howards cam 225/225 and 536/541 lift..........I made the cam swap. Now running the Howards cam.
Do have nice 2" headers.
Not a screamer by any means.
Click to expand...

You would think that ATK would know better than to use a single pattern cam especially with any iron head and most aluminum castings.







Scotty J. "AKA" The "Mad Porter"
"EMC 2006" 3rd place finisher
Ported BBF iron head specialist & Aluminum heads from all sources.
Custom ground cams
See our products in the Vendor for sale section
Customized crate engines
ParklandAutoMachine.com
R-H-P.biz
"Parkland Performance Auto Machine" Formerly RHP
(253)-988-6648
Parkland Auto Machine
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