Visit The Dirt Forum for More Information

Author Topic:   Mopar 48 Degree block
posted June 14, 2003 12:13 AM
Ok guys,
Help me out with this one. I have an AFTER MARKET 48 DEGREE SMALL BLOCK MOPAR block. I had to go back and redrill the lifter galley because it galded the lifters. I have been having problems with it also spinning the cam bearings. Can any of you Mopar guys help me out?

Hi Guys,
I have an 86 Olds Cutlass/#3600 Dirt track car... I need some suggestions and tricks to help make it handle better on a 3/8 mile med. tacky dirt track. The track has tight corners and 6 degrees banking. Right now we use 8" rims (Max. Track rules) with 3" back spaceing on the right and 4" back spaceing on the left. We do use about 2"-3" stagger on the rear.
HEY! If any of you winning racers have some hot tips then E-Mail me at:
Thanks for looking and reading,

rico 08
posted June 14, 2003 12:43 AM
man if the winston cup guy's blow em too i don't know.

Brad haddix
posted June 15, 2003 08:15 AM
check out they have a circle track forum. I've seen them all blow in fantasy cup, maybe the toyotas won't


The Rascal
posted June 18, 2003 07:03 PM
What heads/valvetrain? Shaft or Pushrod oiled? What Stroke?

Basic necessary mods include:

Drill all block holes to 9/16", from main galley to main's is 5/16"

SLOT main bearing to 1/2" inch at center

Cut Groove in main saddles from center up to 3/4" from pan deck, drill a 5/32" hole 1" down from edge in main bearing on both ends

Basic rule for dirt is Pressure over Volume...unless the stroke's over 3.580"

For very detailed info look for Mr Sanborn's "typical oiling mods" in the moparchat circletrack forum...Rascal

Race the TRACK...not the dyno...

The Rascal
posted June 18, 2003 07:16 PM

Longshot...but 48 degree/roller cam above .700" lift & victor intake the roller lifters kiss the kiss the manifold...

Stick fo federal mogul & durabond cam bearings....especially with roller cams...and System 1 filters offere much less pressure restriction over conventional types...Rascal

Back to the Archives